diff --git a/helpers/mock-agent/endpoint-syndicate.js b/helpers/mock-agent/endpoint-syndicate.js
index ea183d606..355140f31 100644
--- a/helpers/mock-agent/endpoint-syndicate.js
+++ b/helpers/mock-agent/endpoint-syndicate.js
@@ -9,19 +9,55 @@ export function mockClient() {
   agent.disableNetConnect();
   agent.enableNetConnect(/(?:127\.0\.0\.1:\d{5})/);
 
-  const origin = "https://store.example";
+  const statusId = "1234567890987654321";
+  const storeOrigin = "https://store.example";
+  const syndicatorOrigin = "https://mastodon.example";
+  const syndicatorResponseOptions = {
+    headers: { "Content-type": "application/json" },
+  };
 
   // Create file on content store
   agent
-    .get(origin)
+    .get(storeOrigin)
     .intercept({ path: /\/user\/.*\.(md|jpg)/, method: "PUT" })
     .reply(201);
 
   // Update file on content store
   agent
-    .get(origin)
+    .get(storeOrigin)
     .intercept({ path: /\/user\/.*\.(md|jpg)/, method: "PATCH" })
     .reply(201);
 
+  // Get instance information from syndication target
+  agent
+    .get(syndicatorOrigin)
+    .intercept({
+      path: `/api/v1/instance`,
+    })
+    .reply(
+      200,
+      {
+        uri: syndicatorOrigin,
+        urls: { streaming_api: "https://streaming.mastodon.example" },
+        version: "4.1.2",
+      },
+      syndicatorResponseOptions
+    )
+    .persist();
+
+  // Post status to syndication target
+  agent
+    .get(syndicatorOrigin)
+    .intercept({ path: `/api/v1/statuses`, method: "POST" })
+    .reply(
+      200,
+      {
+        id: statusId,
+        url: `https://mastodon.example/@username/${statusId}`,
+      },
+      syndicatorResponseOptions
+    )
+    .persist();
+
   return agent;
 }
diff --git a/helpers/mock-agent/syndicator-mastodon.js b/helpers/mock-agent/syndicator-mastodon.js
new file mode 100644
index 000000000..de6075d0a
--- /dev/null
+++ b/helpers/mock-agent/syndicator-mastodon.js
@@ -0,0 +1,126 @@
+import { MockAgent } from "undici";
+import { getFixture } from "@indiekit-test/fixtures";
+
+/**
+ * @returns {import("undici").MockAgent} Undici MockAgent
+ * @see {@link https://undici.nodejs.org/#/docs/api/MockAgent}
+ */
+export function mockClient() {
+  const agent = new MockAgent();
+  agent.disableNetConnect();
+
+  const id = "1234567890987654321";
+  const instanceOrigin = "https://mastodon.example";
+  const instanceResponse = {
+    uri: instanceOrigin,
+    urls: { streaming_api: "https://streaming.mastodon.example" },
+    version: "4.1.2",
+  };
+  const statusResponse = {
+    id,
+    url: `https://mastodon.example/@username/${id}`,
+  };
+  const responseOptions = {
+    headers: { "Content-type": "application/json" },
+  };
+  const websiteOrigin = "https://website.example";
+
+  // Instance information
+  agent
+    .get(instanceOrigin)
+    .intercept({
+      path: `/api/v1/instance`,
+      headers: { authorization: "Bearer token" },
+    })
+    .reply(200, instanceResponse, responseOptions)
+    .persist();
+
+  // Instance information (Unauthorized, invalid access token)
+  agent
+    .get(instanceOrigin)
+    .intercept({
+      path: `/api/v1/instance`,
+      headers: {
+        authorization: "Bearer invalid",
+      },
+    })
+    .reply(401)
+    .persist();
+
+  // Instance information (Unauthorized, no access token provided)
+  agent
+    .get(instanceOrigin)
+    .intercept({
+      path: `/api/v1/instance`,
+    })
+    .reply(401)
+    .persist();
+
+  // Post favourite
+  agent
+    .get(instanceOrigin)
+    .intercept({ path: `/api/v1/statuses/${id}/favourite`, method: "POST" })
+    .reply(200, statusResponse, responseOptions)
+    .persist();
+
+  // Post reblog
+  agent
+    .get(instanceOrigin)
+    .intercept({ path: `/api/v1/statuses/${id}/reblog`, method: "POST" })
+    .reply(200, statusResponse, responseOptions)
+    .persist();
+
+  // Post status
+  agent
+    .get(instanceOrigin)
+    .intercept({ path: `/api/v1/statuses`, method: "POST" })
+    .reply(200, statusResponse, responseOptions)
+    .persist();
+
+  // Media information
+  agent
+    .get(instanceOrigin)
+    .intercept({ path: "/api/v1/media/1" })
+    .reply(
+      200,
+      { id: 1, url: `https://mastodon.example/1.jpg` },
+      responseOptions
+    )
+    .persist();
+
+  // Upload media
+  agent
+    .get(instanceOrigin)
+    .intercept({
+      path: `/api/v2/media`,
+      method: "POST",
+    })
+    .reply(202, { id: 1, type: "image" }, responseOptions)
+    .persist();
+
+  // Upload media (Not Found)
+  agent
+    .get(instanceOrigin)
+    .intercept({
+      path: `/api/v2/media`,
+      method: "POST",
+    })
+    .reply(404, { error: "Record not found" }, responseOptions)
+    .persist();
+
+  // Get media file
+  agent
+    .get(websiteOrigin)
+    .intercept({ path: "/photo1.jpg" })
+    .reply(200, getFixture("file-types/photo.jpg", false))
+    .persist();
+
+  // Get media file (Not Found)
+  agent
+    .get(websiteOrigin)
+    .intercept({ path: "/404.jpg" })
+    .reply(404, {})
+    .persist();
+
+  return agent;
+}
diff --git a/package-lock.json b/package-lock.json
index 660ea25a6..81352a676 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -107,8 +107,7 @@
     },
     "helpers/server/node_modules/get-port": {
       "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/get-port/-/get-port-7.0.0.tgz",
-      "integrity": "sha512-mDHFgApoQd+azgMdwylJrv2DX47ywGq1i5VFJE7fZ0dttNq3iQMfsU4IvEgBHojA3KqEudyu7Vq+oN8kNaNkWw==",
+      "license": "MIT",
       "engines": {
         "node": ">=16"
       },
@@ -2376,6 +2375,23 @@
         "node": ">=8"
       }
     },
+    "node_modules/@mastojs/ponyfills": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@mastojs/ponyfills/-/ponyfills-1.0.4.tgz",
+      "integrity": "sha512-1NaIGmcU7OmyNzx0fk+cYeGTkdXlOJOSdetaC4pStVWsrhht2cdlYSAfe5NDW3FcUmcEm2vVceB9lcClN1RCxw==",
+      "dependencies": {
+        "@types/node": "^18.11.17",
+        "@types/node-fetch": "^2.6.2",
+        "abort-controller": "^3.0.0",
+        "form-data": "^4.0.0",
+        "node-fetch": "^2.6.7"
+      }
+    },
+    "node_modules/@mastojs/ponyfills/node_modules/@types/node": {
+      "version": "18.16.19",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.16.19.tgz",
+      "integrity": "sha512-IXl7o+R9iti9eBW4Wg2hx1xQDig183jj7YLn8F7udNceyfkbn1ZxmzZXuak20gR40D7pIkIY1kYGx5VIGbaHKA=="
+    },
     "node_modules/@messageformat/core": {
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/@messageformat/core/-/core-3.2.0.tgz",
@@ -3951,19 +3967,33 @@
       "resolved": "https://registry.npmjs.org/@types/node/-/node-20.4.2.tgz",
       "integrity": "sha512-Dd0BYtWgnWJKwO1jkmTrzofjK2QXXcai0dmtzvIBhcA+RsG5h8R3xlyta0kGOZRNfL9GuRtb1knmPEhQrePCEw=="
     },
+    "node_modules/@types/node-fetch": {
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/@types/node-fetch/-/node-fetch-2.6.4.tgz",
+      "integrity": "sha512-1ZX9fcN4Rvkvgv4E6PAY5WXUFWFcRWxZa3EW83UjycOB9ljJCedb2CupIP4RZMEwF/M3eTcCihbBRgwtGbg5Rg==",
+      "dependencies": {
+        "@types/node": "*",
+        "form-data": "^3.0.0"
+      }
+    },
+    "node_modules/@types/node-fetch/node_modules/form-data": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-3.0.1.tgz",
+      "integrity": "sha512-RHkBKtLWUVwd7SqRIvCZMEvAMoGUp0XU+seQiZejj0COz3RI3hWP4sCv3gZWWLjJTd7rGwcsF5eKZGii0r/hbg==",
+      "dependencies": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.8",
+        "mime-types": "^2.1.12"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/@types/normalize-package-data": {
       "version": "2.4.1",
       "resolved": "https://registry.npmjs.org/@types/normalize-package-data/-/normalize-package-data-2.4.1.tgz",
       "integrity": "sha512-Gj7cI7z+98M282Tqmp2K5EIsoouUEzbBJhQQzDE3jSIRk6r9gsz0oUokqIUR4u1R3dMHo0pDHM7sNOHyhulypw=="
     },
-    "node_modules/@types/oauth": {
-      "version": "0.9.1",
-      "resolved": "https://registry.npmjs.org/@types/oauth/-/oauth-0.9.1.tgz",
-      "integrity": "sha512-a1iY62/a3yhZ7qH7cNUsxoI3U/0Fe9+RnuFrpTKr+0WVOzbKlSLojShCKe20aOD1Sppv+i8Zlq0pLDuTJnwS4A==",
-      "dependencies": {
-        "@types/node": "*"
-      }
-    },
     "node_modules/@types/qs": {
       "version": "6.9.7",
       "resolved": "https://registry.npmjs.org/@types/qs/-/qs-6.9.7.tgz",
@@ -4022,14 +4052,6 @@
         "@types/webidl-conversions": "*"
       }
     },
-    "node_modules/@types/ws": {
-      "version": "8.5.5",
-      "resolved": "https://registry.npmjs.org/@types/ws/-/ws-8.5.5.tgz",
-      "integrity": "sha512-lwhs8hktwxSjf9UaZ9tG5M03PGogvFaH8gUgLNbN9HKIg0dvv6q+gkSuJ8HN4/VbyxkuLzCjlN7GquQ0gUJfIg==",
-      "dependencies": {
-        "@types/node": "*"
-      }
-    },
     "node_modules/@vitejs/plugin-vue": {
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/@vitejs/plugin-vue/-/plugin-vue-4.2.3.tgz",
@@ -4405,6 +4427,17 @@
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz",
       "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q=="
     },
+    "node_modules/abort-controller": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/abort-controller/-/abort-controller-3.0.0.tgz",
+      "integrity": "sha512-h8lQ8tacZYnR3vNQTgibj+tODHI5/+l06Au2Pcriv/Gmet0eaj4TwWH41sO9wnHDiQsEj19q0drzdWdeAHtweg==",
+      "dependencies": {
+        "event-target-shim": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=6.5"
+      }
+    },
     "node_modules/accepts": {
       "version": "1.3.8",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
@@ -4492,33 +4525,6 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
-    "node_modules/aggregate-error/node_modules/clean-stack": {
-      "version": "4.2.0",
-      "resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-4.2.0.tgz",
-      "integrity": "sha512-LYv6XPxoyODi36Dp976riBtSY27VmFo+MKqEU9QCCWyTrdEPDog+RWA7xQWHi6Vbp61j5c4cdzzX1NidnwtUWg==",
-      "dev": true,
-      "dependencies": {
-        "escape-string-regexp": "5.0.0"
-      },
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/aggregate-error/node_modules/escape-string-regexp": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-5.0.0.tgz",
-      "integrity": "sha512-/veY75JbMK4j1yjvuUxuVsiS/hr/4iHs9FTT6cgTexxdE0Ly/glccBAkloH/DofkjRbZU3bnoj38mOmhkZ0lHw==",
-      "dev": true,
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
     "node_modules/ajv": {
       "version": "8.12.0",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.12.0.tgz",
@@ -5447,6 +5453,15 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/camel-case": {
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/camel-case/-/camel-case-4.1.2.tgz",
+      "integrity": "sha512-gxGWBrTT1JuMx6R+o5PTXMmUnhnVzLQ9SNutD4YqKtI6ap897t3tKECYla6gCWEkplXnlNybEkZg9GEGxKFCgw==",
+      "dependencies": {
+        "pascal-case": "^3.1.2",
+        "tslib": "^2.0.3"
+      }
+    },
     "node_modules/camelcase": {
       "version": "5.3.1",
       "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
@@ -5490,6 +5505,16 @@
         }
       ]
     },
+    "node_modules/capital-case": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/capital-case/-/capital-case-1.0.4.tgz",
+      "integrity": "sha512-ds37W8CytHgwnhGGTi88pcPyR15qoNkOpYwmMMfnWqqWgESapLqvDx6huFjQ5vqWSn2Z06173XNA7LtMOeUh1A==",
+      "dependencies": {
+        "no-case": "^3.0.4",
+        "tslib": "^2.0.3",
+        "upper-case-first": "^2.0.2"
+      }
+    },
     "node_modules/cbor": {
       "version": "8.1.0",
       "resolved": "https://registry.npmjs.org/cbor/-/cbor-8.1.0.tgz",
@@ -5547,6 +5572,25 @@
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
       "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
     },
+    "node_modules/change-case": {
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/change-case/-/change-case-4.1.2.tgz",
+      "integrity": "sha512-bSxY2ws9OtviILG1EiY5K7NNxkqg/JnRnFxLtKQ96JaviiIxi7djMrSd0ECT9AC+lttClmYwKw53BWpOMblo7A==",
+      "dependencies": {
+        "camel-case": "^4.1.2",
+        "capital-case": "^1.0.4",
+        "constant-case": "^3.0.4",
+        "dot-case": "^3.0.4",
+        "header-case": "^2.0.4",
+        "no-case": "^3.0.4",
+        "param-case": "^3.0.4",
+        "pascal-case": "^3.1.2",
+        "path-case": "^3.0.4",
+        "sentence-case": "^3.0.4",
+        "snake-case": "^3.0.4",
+        "tslib": "^2.0.3"
+      }
+    },
     "node_modules/chardet": {
       "version": "0.7.0",
       "resolved": "https://registry.npmjs.org/chardet/-/chardet-0.7.0.tgz",
@@ -5644,14 +5688,15 @@
       }
     },
     "node_modules/clean-stack": {
-      "version": "5.2.0",
-      "resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-5.2.0.tgz",
-      "integrity": "sha512-TyUIUJgdFnCISzG5zu3291TAsE77ddchd0bepon1VVQrKLGKFED4iXFEDQ24mIPdPBbyE16PK3F8MYE1CmcBEQ==",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-4.2.0.tgz",
+      "integrity": "sha512-LYv6XPxoyODi36Dp976riBtSY27VmFo+MKqEU9QCCWyTrdEPDog+RWA7xQWHi6Vbp61j5c4cdzzX1NidnwtUWg==",
+      "dev": true,
       "dependencies": {
         "escape-string-regexp": "5.0.0"
       },
       "engines": {
-        "node": ">=14.16"
+        "node": ">=12"
       },
       "funding": {
         "url": "https://github.com/sponsors/sindresorhus"
@@ -5661,6 +5706,7 @@
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-5.0.0.tgz",
       "integrity": "sha512-/veY75JbMK4j1yjvuUxuVsiS/hr/4iHs9FTT6cgTexxdE0Ly/glccBAkloH/DofkjRbZU3bnoj38mOmhkZ0lHw==",
+      "dev": true,
       "engines": {
         "node": ">=12"
       },
@@ -6030,6 +6076,16 @@
       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
       "integrity": "sha512-ty/fTekppD2fIwRvnZAVdeOiGd1c7YXEixbgJTNzqcxJWKQnjJ/V1bNEEE6hygpM3WjwHFUVK6HTjWSzV4a8sQ=="
     },
+    "node_modules/constant-case": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/constant-case/-/constant-case-3.0.4.tgz",
+      "integrity": "sha512-I2hSBi7Vvs7BEuJDr5dDHfzb/Ruj3FyvFyh7KLilAjNQw3Be+xgqUBA2W6scVEcL0hL1dwPRtIqEPVUCKkSsyQ==",
+      "dependencies": {
+        "no-case": "^3.0.4",
+        "tslib": "^2.0.3",
+        "upper-case": "^2.0.2"
+      }
+    },
     "node_modules/content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -6624,11 +6680,6 @@
         "node": "*"
       }
     },
-    "node_modules/dayjs": {
-      "version": "1.11.9",
-      "resolved": "https://registry.npmjs.org/dayjs/-/dayjs-1.11.9.tgz",
-      "integrity": "sha512-QvzAURSbQ0pKdIye2txOzNaHmxtUBXerpY0FJsFXUMKbIZeFm5ht1LS/jFsrncjnmtv8HsG0W2g6c0zUjZWmpA=="
-    },
     "node_modules/debug": {
       "version": "4.3.4",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz",
@@ -6927,6 +6978,15 @@
         "url": "https://github.com/fb55/domutils?sponsor=1"
       }
     },
+    "node_modules/dot-case": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/dot-case/-/dot-case-3.0.4.tgz",
+      "integrity": "sha512-Kv5nKlh6yRrdrGvxeJ2e5y2eRUpkUosIW4A2AS38zwSz27zu7ufDwQPi5Jhs3XAlGNetl3bmnGhQsMtkKJnj3w==",
+      "dependencies": {
+        "no-case": "^3.0.4",
+        "tslib": "^2.0.3"
+      }
+    },
     "node_modules/dot-prop": {
       "version": "5.3.0",
       "resolved": "https://registry.npmjs.org/dot-prop/-/dot-prop-5.3.0.tgz",
@@ -7473,6 +7533,14 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/event-target-shim": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/event-target-shim/-/event-target-shim-5.0.1.tgz",
+      "integrity": "sha512-i/2XbnSz/uxRCU6+NdVJgKWDTM427+MqYbkQzD321DuCQJUqOuJKIA0IM2+W2xtYHdKOmZ4dR6fExsd4SXL+WQ==",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/eventemitter3": {
       "version": "4.0.7",
       "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-4.0.7.tgz",
@@ -8654,6 +8722,15 @@
       "resolved": "https://registry.npmjs.org/has-unicode/-/has-unicode-2.0.1.tgz",
       "integrity": "sha512-8Rf9Y83NBReMnx0gFzA8JImQACstCYWUplepDa9xprwwtmgEZUF0h/i5xSA625zB/I37EtrswSST6OXxwaaIJQ=="
     },
+    "node_modules/header-case": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/header-case/-/header-case-2.0.4.tgz",
+      "integrity": "sha512-H/vuk5TEEVZwrR0lp2zed9OCo1uAILMlx0JEMgC26rzyJJ3N1v6XkwHHXJQdR2doSjcGPM6OKPYoJgf0plJ11Q==",
+      "dependencies": {
+        "capital-case": "^1.0.4",
+        "tslib": "^2.0.3"
+      }
+    },
     "node_modules/hexoid": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/hexoid/-/hexoid-1.0.0.tgz",
@@ -9426,6 +9503,14 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/isomorphic-ws": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/isomorphic-ws/-/isomorphic-ws-5.0.0.tgz",
+      "integrity": "sha512-muId7Zzn9ywDsyXgTIafTry2sV3nySZeUDe6YedVd1Hvuuep5AsIlqK+XefWpYTyJG5e503F2xIuT2lcU6rCSw==",
+      "peerDependencies": {
+        "ws": "*"
+      }
+    },
     "node_modules/istanbul-lib-coverage": {
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-3.2.0.tgz",
@@ -11160,6 +11245,14 @@
         "node": ">=8"
       }
     },
+    "node_modules/lower-case": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/lower-case/-/lower-case-2.0.2.tgz",
+      "integrity": "sha512-7fm3l3NAF9WfN6W3JOmf5drwpVqX78JtoGJ3A6W0a6ZnldM41w2fV5D490psKFTpMds8TJse/eHLFFsNHHjHgg==",
+      "dependencies": {
+        "tslib": "^2.0.3"
+      }
+    },
     "node_modules/lru-cache": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
@@ -11337,6 +11430,25 @@
       "integrity": "sha512-TxFAc76Jnhb2OUu+n3yz9RMu4CwGfaT788br6HhEDlvWfdeJcLUsxk1Hgw2yJio0OXsxv7pyIPmvECY7bMbluA==",
       "dev": true
     },
+    "node_modules/masto": {
+      "version": "5.11.4",
+      "resolved": "https://registry.npmjs.org/masto/-/masto-5.11.4.tgz",
+      "integrity": "sha512-sLF3SJTNZDAP57Y+8vAdd1KQTuWWxmGUrBF1R2GLPL6zij/1wXxV05+h8GZhnfg+696arkt+w6ZlKvEEfH1yvg==",
+      "dependencies": {
+        "@mastojs/ponyfills": "^1.0.4",
+        "change-case": "^4.1.2",
+        "eventemitter3": "^5.0.0",
+        "isomorphic-ws": "^5.0.0",
+        "qs": "^6.11.0",
+        "semver": "^7.3.7",
+        "ws": "^8.13.0"
+      }
+    },
+    "node_modules/masto/node_modules/eventemitter3": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-5.0.1.tgz",
+      "integrity": "sha512-GWkBvjiSZK87ELrYOSESUYeVIc9mvLLf/nXalMOS5dYrgZq9o5OVkbZAVM06CVxYsCwH9BDZFPlQTlPA1j4ahA=="
+    },
     "node_modules/matcher": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/matcher/-/matcher-5.0.0.tgz",
@@ -11425,77 +11537,6 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/megalodon": {
-      "version": "6.1.2",
-      "resolved": "https://registry.npmjs.org/megalodon/-/megalodon-6.1.2.tgz",
-      "integrity": "sha512-sLftVOMUvgaBGcZ/hKAyLI2PcyZIbcqrGGsNX5UzPBX9GbCmIBub1BM7MNSs25zAJhAJiA3BuHB63k4eb5ul3Q==",
-      "dependencies": {
-        "@types/oauth": "^0.9.0",
-        "@types/ws": "^8.5.5",
-        "axios": "1.4.0",
-        "dayjs": "^1.11.8",
-        "form-data": "^4.0.0",
-        "https-proxy-agent": "^7.0.0",
-        "oauth": "^0.10.0",
-        "object-assign-deep": "^0.4.0",
-        "parse-link-header": "^2.0.0",
-        "socks-proxy-agent": "^8.0.1",
-        "typescript": "5.0.4",
-        "uuid": "^9.0.0",
-        "ws": "8.13.0"
-      },
-      "engines": {
-        "node": ">=15.0.0"
-      }
-    },
-    "node_modules/megalodon/node_modules/agent-base": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.0.tgz",
-      "integrity": "sha512-o/zjMZRhJxny7OyEF+Op8X+efiELC7k7yOjMzgfzVqOzXqkBkWI79YoTdOtsuWd5BWhAGAuOY/Xa6xpiaWXiNg==",
-      "dependencies": {
-        "debug": "^4.3.4"
-      },
-      "engines": {
-        "node": ">= 14"
-      }
-    },
-    "node_modules/megalodon/node_modules/https-proxy-agent": {
-      "version": "7.0.1",
-      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-7.0.1.tgz",
-      "integrity": "sha512-Eun8zV0kcYS1g19r78osiQLEFIRspRUDd9tIfBCTBPBeMieF/EsJNL8VI3xOIdYRDEkjQnqOYPsZ2DsWsVsFwQ==",
-      "dependencies": {
-        "agent-base": "^7.0.2",
-        "debug": "4"
-      },
-      "engines": {
-        "node": ">= 14"
-      }
-    },
-    "node_modules/megalodon/node_modules/socks-proxy-agent": {
-      "version": "8.0.1",
-      "resolved": "https://registry.npmjs.org/socks-proxy-agent/-/socks-proxy-agent-8.0.1.tgz",
-      "integrity": "sha512-59EjPbbgg8U3x62hhKOFVAmySQUcfRQ4C7Q/D5sEHnZTQRrQlNKINks44DMR1gwXp0p4LaVIeccX2KHTTcHVqQ==",
-      "dependencies": {
-        "agent-base": "^7.0.1",
-        "debug": "^4.3.4",
-        "socks": "^2.7.1"
-      },
-      "engines": {
-        "node": ">= 14"
-      }
-    },
-    "node_modules/megalodon/node_modules/typescript": {
-      "version": "5.0.4",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.0.4.tgz",
-      "integrity": "sha512-cW9T5W9xY37cc+jfEnaUvX91foxtHkza3Nw3wkoF4sSlKn0MONdkdEndig/qPBWXNkmplh3NzayQzCiHM4/hqw==",
-      "bin": {
-        "tsc": "bin/tsc",
-        "tsserver": "bin/tsserver"
-      },
-      "engines": {
-        "node": ">=12.20"
-      }
-    },
     "node_modules/mem": {
       "version": "9.0.2",
       "resolved": "https://registry.npmjs.org/mem/-/mem-9.0.2.tgz",
@@ -12215,6 +12256,15 @@
         "isarray": "0.0.1"
       }
     },
+    "node_modules/no-case": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/no-case/-/no-case-3.0.4.tgz",
+      "integrity": "sha512-fgAN3jGAh+RoxUGZHTSOLJIqUc2wmoBwGR4tbpNAKmmovFoWq0OdRkb0VkldReO2a2iBT/OEulG9XSUc10r3zg==",
+      "dependencies": {
+        "lower-case": "^2.0.2",
+        "tslib": "^2.0.3"
+      }
+    },
     "node_modules/nock": {
       "version": "13.3.2",
       "resolved": "https://registry.npmjs.org/nock/-/nock-13.3.2.tgz",
@@ -12939,11 +12989,6 @@
         "node": ">=12"
       }
     },
-    "node_modules/oauth": {
-      "version": "0.10.0",
-      "resolved": "https://registry.npmjs.org/oauth/-/oauth-0.10.0.tgz",
-      "integrity": "sha512-1orQ9MT1vHFGQxhuy7E/0gECD3fd2fCC+PIX+/jgmU/gI3EpRocXtmtvxCO5x3WZ443FLTLFWNDjl5MPJf9u+Q=="
-    },
     "node_modules/oauth-1.0a": {
       "version": "2.2.6",
       "resolved": "https://registry.npmjs.org/oauth-1.0a/-/oauth-1.0a-2.2.6.tgz",
@@ -12957,14 +13002,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/object-assign-deep": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/object-assign-deep/-/object-assign-deep-0.4.0.tgz",
-      "integrity": "sha512-54Uvn3s+4A/cMWx9tlRez1qtc7pN7pbQ+Yi7mjLjcBpWLlP+XbSHiHbQW6CElDiV4OvuzqnMrBdkgxI1mT8V/Q==",
-      "engines": {
-        "node": ">=6"
-      }
-    },
     "node_modules/object-inspect": {
       "version": "1.12.3",
       "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.12.3.tgz",
@@ -13398,6 +13435,15 @@
         "node": "^14.17.0 || ^16.13.0 || >=18.0.0"
       }
     },
+    "node_modules/param-case": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/param-case/-/param-case-3.0.4.tgz",
+      "integrity": "sha512-RXlj7zCYokReqWpOPH9oYivUzLYZ5vAPIfEmCTNViosC78F8F0H9y7T7gG2M39ymgutxF5gcFEsyZQSph9Bp3A==",
+      "dependencies": {
+        "dot-case": "^3.0.4",
+        "tslib": "^2.0.3"
+      }
+    },
     "node_modules/parent-module": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/parent-module/-/parent-module-1.0.1.tgz",
@@ -13439,14 +13485,6 @@
       "resolved": "https://registry.npmjs.org/lines-and-columns/-/lines-and-columns-1.2.4.tgz",
       "integrity": "sha512-7ylylesZQ/PV29jhEDl3Ufjo6ZX7gCqJr5F7PKrqc93v7fzSymt1BpwEU8nAUXs8qzzvqhbjhK5QZg6Mt/HkBg=="
     },
-    "node_modules/parse-link-header": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/parse-link-header/-/parse-link-header-2.0.0.tgz",
-      "integrity": "sha512-xjU87V0VyHZybn2RrCX5TIFGxTVZE6zqqZWMPlIKiSKuWh/X5WZdt+w1Ki1nXB+8L/KtL+nZ4iq+sfI6MrhhMw==",
-      "dependencies": {
-        "xtend": "~4.0.1"
-      }
-    },
     "node_modules/parse-ms": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/parse-ms/-/parse-ms-3.0.0.tgz",
@@ -13519,6 +13557,24 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/pascal-case": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/pascal-case/-/pascal-case-3.1.2.tgz",
+      "integrity": "sha512-uWlGT3YSnK9x3BQJaOdcZwrnV6hPpd8jFH1/ucpiLRPh/2zCVJKS19E4GvYHvaCcACn3foXZ0cLB9Wrx1KGe5g==",
+      "dependencies": {
+        "no-case": "^3.0.4",
+        "tslib": "^2.0.3"
+      }
+    },
+    "node_modules/path-case": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/path-case/-/path-case-3.0.4.tgz",
+      "integrity": "sha512-qO4qCFjXqVTrcbPt/hQfhTQ+VhFsqNKOPtytgNKkKxSoEp3XPUQ8ObFuePylOIok5gjn69ry8XiULxCwot3Wfg==",
+      "dependencies": {
+        "dot-case": "^3.0.4",
+        "tslib": "^2.0.3"
+      }
+    },
     "node_modules/path-exists": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-4.0.0.tgz",
@@ -15217,6 +15273,16 @@
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
       "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
     },
+    "node_modules/sentence-case": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/sentence-case/-/sentence-case-3.0.4.tgz",
+      "integrity": "sha512-8LS0JInaQMCRoQ7YUytAo/xUu5W2XnQxV2HI/6uM6U7CITS1RqPElr30V6uIqyMKM9lJGRVFy5/4CuzcixNYSg==",
+      "dependencies": {
+        "no-case": "^3.0.4",
+        "tslib": "^2.0.3",
+        "upper-case-first": "^2.0.2"
+      }
+    },
     "node_modules/serialize-error": {
       "version": "7.0.1",
       "resolved": "https://registry.npmjs.org/serialize-error/-/serialize-error-7.0.1.tgz",
@@ -15534,6 +15600,15 @@
         "npm": ">= 3.0.0"
       }
     },
+    "node_modules/snake-case": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/snake-case/-/snake-case-3.0.4.tgz",
+      "integrity": "sha512-LAOh4z89bGQvl9pFfNF8V146i7o7/CqFPbqzYgP+yYzDIDeS9HaNFtXABamRW+AQzEVODcvE79ljJ+8a9YSdMg==",
+      "dependencies": {
+        "dot-case": "^3.0.4",
+        "tslib": "^2.0.3"
+      }
+    },
     "node_modules/socks": {
       "version": "2.7.1",
       "resolved": "https://registry.npmjs.org/socks/-/socks-2.7.1.tgz",
@@ -17077,6 +17152,22 @@
         "browserslist": ">= 4.21.0"
       }
     },
+    "node_modules/upper-case": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/upper-case/-/upper-case-2.0.2.tgz",
+      "integrity": "sha512-KgdgDGJt2TpuwBUIjgG6lzw2GWFRCW9Qkfkiv0DxqHHLYJHmtmdUIKcZd8rHgFSjopVTlw6ggzCm1b8MFQwikg==",
+      "dependencies": {
+        "tslib": "^2.0.3"
+      }
+    },
+    "node_modules/upper-case-first": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/upper-case-first/-/upper-case-first-2.0.2.tgz",
+      "integrity": "sha512-514ppYHBaKwfJRK/pNC6c/OxfGa0obSnAl106u97Ed0I625Nin96KAjttZF6ZL3e1XLtphxnqrOi9iWgm+u+bg==",
+      "dependencies": {
+        "tslib": "^2.0.3"
+      }
+    },
     "node_modules/uri-js": {
       "version": "4.4.1",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
@@ -18032,8 +18123,7 @@
     },
     "packages/create-indiekit/node_modules/chalk": {
       "version": "5.3.0",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-5.3.0.tgz",
-      "integrity": "sha512-dLitG79d+GV1Nb/VYcCDFivJeK1hiukt9QjRNVOsUtTy1rR1YJsmpGGTZ3qJos+uw7WmWF4wUwBd9jxjocFC2w==",
+      "license": "MIT",
       "engines": {
         "node": "^12.17.0 || ^14.13 || >=16.0.0"
       },
@@ -18242,14 +18332,38 @@
         "node": ">=18"
       }
     },
+    "packages/indiekit/node_modules/clean-stack": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-5.2.0.tgz",
+      "integrity": "sha512-TyUIUJgdFnCISzG5zu3291TAsE77ddchd0bepon1VVQrKLGKFED4iXFEDQ24mIPdPBbyE16PK3F8MYE1CmcBEQ==",
+      "dependencies": {
+        "escape-string-regexp": "5.0.0"
+      },
+      "engines": {
+        "node": ">=14.16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "packages/indiekit/node_modules/commander": {
       "version": "11.0.0",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-11.0.0.tgz",
-      "integrity": "sha512-9HMlXtt/BNoYr8ooyjjNRdIilOTkVJXB+GhxMTtOKwk0R4j4lS4NpjuqmRxroBfnfTSHQIHQB7wryHhXarNjmQ==",
+      "license": "MIT",
       "engines": {
         "node": ">=16"
       }
     },
+    "packages/indiekit/node_modules/escape-string-regexp": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-5.0.0.tgz",
+      "integrity": "sha512-/veY75JbMK4j1yjvuUxuVsiS/hr/4iHs9FTT6cgTexxdE0Ly/glccBAkloH/DofkjRbZU3bnoj38mOmhkZ0lHw==",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "packages/preset-hugo": {
       "name": "@indiekit/preset-hugo",
       "version": "1.0.0-beta.4",
@@ -18265,8 +18379,7 @@
     },
     "packages/preset-hugo/node_modules/camelcase": {
       "version": "7.0.1",
-      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-7.0.1.tgz",
-      "integrity": "sha512-xlx1yCK2Oc1APsPXDL2LdlNP6+uu8OCDdhOBSVT279M/S+y75O30C2VuD8T2ogdePBBl7PfPF4504tnLgX3zfw==",
+      "license": "MIT",
       "engines": {
         "node": ">=14.16"
       },
@@ -18276,8 +18389,7 @@
     },
     "packages/preset-hugo/node_modules/camelcase-keys": {
       "version": "8.0.2",
-      "resolved": "https://registry.npmjs.org/camelcase-keys/-/camelcase-keys-8.0.2.tgz",
-      "integrity": "sha512-qMKdlOfsjlezMqxkUGGMaWWs17i2HoL15tM+wtx8ld4nLrUwU58TFdvyGOz/piNP842KeO8yXvggVQSdQ828NA==",
+      "license": "MIT",
       "dependencies": {
         "camelcase": "^7.0.0",
         "map-obj": "^4.3.0",
@@ -18293,8 +18405,7 @@
     },
     "packages/preset-hugo/node_modules/quick-lru": {
       "version": "6.1.1",
-      "resolved": "https://registry.npmjs.org/quick-lru/-/quick-lru-6.1.1.tgz",
-      "integrity": "sha512-S27GBT+F0NTRiehtbrgaSE1idUAJ5bX8dPAQTdylEyNlrdcH5X4Lz7Edz3DYzecbsCluD5zO8ZNEe04z3D3u6Q==",
+      "license": "MIT",
       "engines": {
         "node": ">=12"
       },
@@ -18304,8 +18415,7 @@
     },
     "packages/preset-hugo/node_modules/type-fest": {
       "version": "2.19.0",
-      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-2.19.0.tgz",
-      "integrity": "sha512-RAH822pAdBgcNMAfWnCBU3CFZcfZ/i1eZjwFU/dsLKumyuuP3niueg2UAukXYF0E2AAoc82ZSSf9J0WQBinzHA==",
+      "license": "(MIT OR CC0-1.0)",
       "engines": {
         "node": ">=12.20"
       },
@@ -18411,10 +18521,9 @@
       "dependencies": {
         "@indiekit/error": "^1.0.0-beta.3",
         "@indiekit/util": "^1.0.0-beta.4",
-        "axios": "^1.1.3",
         "brevity": "^0.2.9",
         "html-to-text": "^9.0.0",
-        "megalodon": "^6.0.0"
+        "masto": "^5.11.3"
       },
       "engines": {
         "node": ">=18"
diff --git a/packages/endpoint-syndicate/tests/integration/200-syndicates-recent-post.js b/packages/endpoint-syndicate/tests/integration/200-syndicates-recent-post.js
index 198e2df42..ed2165c1a 100644
--- a/packages/endpoint-syndicate/tests/integration/200-syndicates-recent-post.js
+++ b/packages/endpoint-syndicate/tests/integration/200-syndicates-recent-post.js
@@ -1,7 +1,6 @@
 import { createHash } from "node:crypto";
 import process from "node:process";
 import test from "ava";
-import nock from "nock";
 import supertest from "supertest";
 import jwt from "jsonwebtoken";
 import { mockAgent } from "@indiekit-test/mock-agent";
@@ -16,10 +15,6 @@ test.beforeEach(() => {
 });
 
 test("Syndicates recent post (via Netlify webhook)", async (t) => {
-  nock("https://mastodon.example").post("/api/v1/statuses").reply(200, {
-    url: "https://mastodon.example/@username/1234567890987654321",
-  });
-
   const sha256 = createHash("sha256").update("foo").digest("hex");
   const webhookSignature = jwt.sign(
     { iss: "netlify", sha256 },
diff --git a/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-multiple-targets.js b/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-multiple-targets.js
index 8202d57ee..f3c93e190 100644
--- a/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-multiple-targets.js
+++ b/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-multiple-targets.js
@@ -1,5 +1,4 @@
 import test from "ava";
-import nock from "nock";
 import sinon from "sinon";
 import supertest from "supertest";
 import { mockAgent } from "@indiekit-test/mock-agent";
@@ -12,10 +11,6 @@ await mockAgent("endpoint-syndicate");
 test("Syndicates a URL to multiple targets (one fails)", async (t) => {
   sinon.stub(console, "error");
 
-  nock("https://mastodon.example").post("/api/v1/statuses").reply(200, {
-    url: "https://mastodon.example/@username/1234567890987654321",
-  });
-
   const server = await testServer({
     plugins: [
       "@indiekit/syndicator-internet-archive",
diff --git a/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-target.js b/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-target.js
index b39e8d879..090b2b675 100644
--- a/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-target.js
+++ b/packages/endpoint-syndicate/tests/integration/200-syndicates-url-for-target.js
@@ -1,5 +1,4 @@
 import test from "ava";
-import nock from "nock";
 import supertest from "supertest";
 import { mockAgent } from "@indiekit-test/mock-agent";
 import { testServer } from "@indiekit-test/server";
@@ -8,10 +7,6 @@ import { testToken } from "@indiekit-test/token";
 await mockAgent("endpoint-syndicate");
 
 test("Syndicates a URL", async (t) => {
-  nock("https://mastodon.example").post("/api/v1/statuses").reply(200, {
-    url: "https://mastodon.example/@username/1234567890987654321",
-  });
-
   const server = await testServer({
     plugins: ["@indiekit/syndicator-mastodon"],
   });
diff --git a/packages/endpoint-syndicate/tests/integration/302-syndicates-url-with-redirect.js b/packages/endpoint-syndicate/tests/integration/302-syndicates-url-with-redirect.js
index 07c575acc..5dc61aa9c 100644
--- a/packages/endpoint-syndicate/tests/integration/302-syndicates-url-with-redirect.js
+++ b/packages/endpoint-syndicate/tests/integration/302-syndicates-url-with-redirect.js
@@ -1,5 +1,4 @@
 import test from "ava";
-import nock from "nock";
 import supertest from "supertest";
 import { mockAgent } from "@indiekit-test/mock-agent";
 import { testServer } from "@indiekit-test/server";
@@ -8,10 +7,6 @@ import { testToken } from "@indiekit-test/token";
 await mockAgent("endpoint-syndicate");
 
 test("Syndicates a URL and redirects", async (t) => {
-  nock("https://mastodon.example").post("/api/v1/statuses").reply(200, {
-    url: "https://mastodon.example/@username/1234567890987654321",
-  });
-
   const server = await testServer({
     plugins: ["@indiekit/syndicator-mastodon"],
   });
diff --git a/packages/endpoint-syndicate/tests/integration/403-syndicates-url-missing-update-scope.js b/packages/endpoint-syndicate/tests/integration/403-syndicates-url-missing-update-scope.js
index 8e968e188..622472974 100644
--- a/packages/endpoint-syndicate/tests/integration/403-syndicates-url-missing-update-scope.js
+++ b/packages/endpoint-syndicate/tests/integration/403-syndicates-url-missing-update-scope.js
@@ -1,5 +1,4 @@
 import test from "ava";
-import nock from "nock";
 import supertest from "supertest";
 import { mockAgent } from "@indiekit-test/mock-agent";
 import { testServer } from "@indiekit-test/server";
@@ -8,10 +7,6 @@ import { testToken } from "@indiekit-test/token";
 await mockAgent("endpoint-syndicate");
 
 test("Syndicates a URL and redirects", async (t) => {
-  nock("https://mastodon.example").post("/api/v1/statuses").reply(200, {
-    url: "https://mastodon.example/@username/1234567890987654321",
-  });
-
   const access_token = testToken({ scope: "create" });
   const server = await testServer({
     plugins: ["@indiekit/syndicator-mastodon"],
diff --git a/packages/syndicator-mastodon/index.js b/packages/syndicator-mastodon/index.js
index 3ba624c1f..43ad1446e 100644
--- a/packages/syndicator-mastodon/index.js
+++ b/packages/syndicator-mastodon/index.js
@@ -91,7 +91,7 @@ export default class MastodonSyndicator {
       throw new IndiekitError(error.message, {
         cause: error,
         plugin: this.name,
-        status: error.status,
+        status: error.statusCode,
       });
     }
   }
diff --git a/packages/syndicator-mastodon/lib/mastodon.js b/packages/syndicator-mastodon/lib/mastodon.js
index afe118655..07956a8aa 100644
--- a/packages/syndicator-mastodon/lib/mastodon.js
+++ b/packages/syndicator-mastodon/lib/mastodon.js
@@ -1,12 +1,14 @@
+import { IndiekitError } from "@indiekit/error";
 import { getCanonicalUrl, isSameOrigin } from "@indiekit/util";
-import axios from "axios";
-import megalodon from "megalodon";
+import { login } from "masto";
 import { createStatus, getStatusIdFromUrl } from "./utils.js";
 
 export const mastodon = ({ accessToken, characterLimit, serverUrl }) => ({
-  client() {
-    const generator = megalodon.default;
-    return generator("mastodon", serverUrl, accessToken);
+  async client() {
+    return login({
+      accessToken: accessToken,
+      url: serverUrl,
+    });
   },
 
   /**
@@ -15,9 +17,10 @@ export const mastodon = ({ accessToken, characterLimit, serverUrl }) => ({
    * @returns {Promise<string>} Mastodon status URL
    */
   async postFavourite(statusUrl) {
+    const { v1 } = await this.client();
     const statusId = getStatusIdFromUrl(statusUrl);
-    const { data } = await this.client().favouriteStatus(statusId);
-    return data.url;
+    const status = await v1.statuses.favourite(statusId);
+    return status.url;
   },
 
   /**
@@ -26,9 +29,10 @@ export const mastodon = ({ accessToken, characterLimit, serverUrl }) => ({
    * @returns {Promise<string>} Mastodon status URL
    */
   async postReblog(statusUrl) {
+    const { v1 } = await this.client();
     const statusId = getStatusIdFromUrl(statusUrl);
-    const { data } = await this.client().reblogStatus(statusId);
-    return data.url;
+    const status = await v1.statuses.reblog(statusId);
+    return status.url;
   },
 
   /**
@@ -37,11 +41,9 @@ export const mastodon = ({ accessToken, characterLimit, serverUrl }) => ({
    * @returns {Promise<string>} Mastodon status URL
    */
   async postStatus(parameters) {
-    const { data } = await this.client().postStatus(parameters.status, {
-      in_reply_to_id: parameters.in_reply_to_status_id,
-      media_ids: parameters.media_ids,
-    });
-    return data.url;
+    const { v1 } = await this.client();
+    const status = await v1.statuses.create(parameters);
+    return status.url;
   },
 
   /**
@@ -59,15 +61,22 @@ export const mastodon = ({ accessToken, characterLimit, serverUrl }) => ({
 
     try {
       const mediaUrl = getCanonicalUrl(url, me);
-      const response = await axios(mediaUrl, {
-        responseType: "stream",
-      });
-      const { data } = await this.client().uploadMedia(response.data, {
+      const mediaResponse = await fetch(mediaUrl);
+
+      if (!mediaResponse.ok) {
+        throw await IndiekitError.fromFetch(mediaResponse);
+      }
+
+      const { v2 } = await this.client();
+      const blob = await mediaResponse.blob();
+      const attachment = await v2.mediaAttachments.create({
+        file: new Blob([blob]),
         description: alt,
       });
-      return data.id;
+
+      return attachment.id;
     } catch (error) {
-      const message = error.response?.data?.error || error.message;
+      const message = error.message;
       throw new Error(message);
     }
   },
diff --git a/packages/syndicator-mastodon/lib/utils.js b/packages/syndicator-mastodon/lib/utils.js
index 48a73e747..7998f79bc 100644
--- a/packages/syndicator-mastodon/lib/utils.js
+++ b/packages/syndicator-mastodon/lib/utils.js
@@ -9,7 +9,7 @@ import { htmlToText } from "html-to-text";
  * @param {object} [options] - Options
  * @param {number} [options.characterLimit] - Character limit
  * @param {Array} [options.mediaIds] - Mastodon media IDs
- * @param {string} [options.serverUrl] - Server URL, i.e. https://mastodon.social
+ * @param {string} [options.serverUrl] - Server URL
  * @returns {object} Status parameters
  */
 export const createStatus = (properties, options = {}) => {
@@ -47,7 +47,7 @@ export const createStatus = (properties, options = {}) => {
 
   // Add media IDs
   if (mediaIds) {
-    parameters.media_ids = mediaIds;
+    parameters.mediaIds = mediaIds;
   }
 
   // If post is in reply to a status, add respective parameter
@@ -59,7 +59,7 @@ export const createStatus = (properties, options = {}) => {
     if (inReplyToHostname === serverHostname) {
       // Reply to status
       const statusId = getStatusIdFromUrl(inReplyTo);
-      parameters.in_reply_to_status_id = statusId;
+      parameters.inReplyToId = statusId;
     } else {
       throw IndiekitError.badRequest("Not a reply to a URL at this target");
     }
diff --git a/packages/syndicator-mastodon/package.json b/packages/syndicator-mastodon/package.json
index ed23fa1cb..6f9a38ceb 100644
--- a/packages/syndicator-mastodon/package.json
+++ b/packages/syndicator-mastodon/package.json
@@ -36,10 +36,9 @@
   "dependencies": {
     "@indiekit/error": "^1.0.0-beta.3",
     "@indiekit/util": "^1.0.0-beta.4",
-    "axios": "^1.1.3",
     "brevity": "^0.2.9",
     "html-to-text": "^9.0.0",
-    "megalodon": "^6.0.0"
+    "masto": "^5.11.3"
   },
   "publishConfig": {
     "access": "public"
diff --git a/packages/syndicator-mastodon/tests/index.js b/packages/syndicator-mastodon/tests/index.js
index 90319cfb8..2f2428046 100644
--- a/packages/syndicator-mastodon/tests/index.js
+++ b/packages/syndicator-mastodon/tests/index.js
@@ -1,9 +1,11 @@
 import test from "ava";
-import nock from "nock";
 import { Indiekit } from "@indiekit/indiekit";
 import { getFixture } from "@indiekit-test/fixtures";
+import { mockAgent } from "@indiekit-test/mock-agent";
 import MastodonSyndicator from "../index.js";
 
+await mockAgent("syndicator-mastodon");
+
 const mastodon = new MastodonSyndicator({
   accessToken: "token",
   url: "https://mastodon.example",
@@ -12,21 +14,12 @@ const mastodon = new MastodonSyndicator({
 
 test.beforeEach((t) => {
   t.context = {
-    apiResponse: {
-      emojis: [],
-      id: "1234567890987654321",
-      media_attachments: [],
-      mentions: [],
-      tags: [],
-      url: "https://mastodon.example/@username/1234567890987654321",
-    },
     properties: JSON.parse(
       getFixture("jf2/article-content-provided-html-text.jf2")
     ),
     publication: {
       me: "https://website.example",
     },
-    instanceUrl: "https://mastodon.example",
   };
 });
 
@@ -53,10 +46,7 @@ test("Initiates plug-in", async (t) => {
 });
 
 test("Returns syndicated URL", async (t) => {
-  const { apiResponse, instanceUrl, properties, publication } = t.context;
-
-  nock(instanceUrl).post("/api/v1/statuses").reply(200, apiResponse);
-
+  const { properties, publication } = t.context;
   const result = await mastodon.syndicate(properties, publication);
 
   t.is(result, "https://mastodon.example/@username/1234567890987654321");
@@ -77,7 +67,7 @@ test("Throws error getting syndicated URL if no server URL provided", async (t)
 test("Throws error getting username if no username provided", (t) => {
   const mastodonNoUser = new MastodonSyndicator({
     accessToken: "token",
-    url: t.context.instanceUrl,
+    url: "https://mastodon.example",
   });
 
   t.throws(
@@ -89,24 +79,13 @@ test("Throws error getting username if no username provided", (t) => {
 });
 
 test("Throws error getting syndicated URL if no access token provided", async (t) => {
-  const { instanceUrl, properties, publication } = t.context;
-
-  nock(instanceUrl)
-    .post("/api/v1/statuses")
-    .reply(401, {
-      errors: [
-        {
-          message: "Mastodon syndicator: Request failed with status code 401",
-        },
-      ],
-    });
-
+  const { properties, publication } = t.context;
   const mastodonNoToken = new MastodonSyndicator({
-    url: instanceUrl,
+    url: "https://mastodon.example",
     user: "username",
   });
 
   await t.throwsAsync(mastodonNoToken.syndicate(properties, publication), {
-    message: "Mastodon syndicator: Request failed with status code 401",
+    message: "Mastodon syndicator: Unexpected error occurred",
   });
 });
diff --git a/packages/syndicator-mastodon/tests/unit/mastodon.js b/packages/syndicator-mastodon/tests/unit/mastodon.js
index a583601bc..4237d4630 100644
--- a/packages/syndicator-mastodon/tests/unit/mastodon.js
+++ b/packages/syndicator-mastodon/tests/unit/mastodon.js
@@ -1,238 +1,146 @@
 import test from "ava";
-import nock from "nock";
-import { getFixture } from "@indiekit-test/fixtures";
+import { mockAgent } from "@indiekit-test/mock-agent";
 import { mastodon } from "../../lib/mastodon.js";
 
+await mockAgent("syndicator-mastodon");
+
 test.beforeEach((t) => {
   t.context = {
-    apiResponse: {
-      emojis: [],
-      id: "1234567890987654321",
-      media_attachments: [],
-      mentions: [],
-      tags: [],
-      url: "https://mastodon.example/@username/1234567890987654321",
-    },
     me: "https://website.example",
-    media: {
-      url: "https://website.example/image.jpg",
-      alt: "Example image",
-    },
     options: {
       accessToken: "token",
       serverUrl: "https://mastodon.example",
     },
-    status: "Toot",
+    photo: [
+      {
+        url: "https://website.example/photo1.jpg",
+        alt: "Example image",
+      },
+    ],
+    statusParameters: { status: "Toot" },
     statusId: "1234567890987654321",
     statusUrl: "https://mastodon.example/@username/1234567890987654321",
   };
 });
 
 test("Posts a favourite", async (t) => {
-  nock(t.context.options.serverUrl)
-    .post(`/api/v1/statuses/${t.context.statusId}/favourite`)
-    .reply(200, t.context.apiResponse);
-
-  const result = await mastodon(t.context.options).postFavourite(
-    t.context.statusUrl
-  );
+  const { options, statusId, statusUrl } = t.context;
+  const result = await mastodon(options).postFavourite(statusUrl);
 
-  t.is(result, `https://mastodon.example/@username/${t.context.statusId}`);
+  t.is(result, `https://mastodon.example/@username/${statusId}`);
 });
 
 test("Throws error posting a favourite", async (t) => {
-  nock(t.context.options.serverUrl)
-    .post(`/api/v1/statuses/${t.context.statusId}/favourite`)
-    .reply(404, { message: "Not found" });
+  const { options, statusUrl } = t.context;
+  options.accessToken = "invalid";
 
-  await t.throwsAsync(
-    mastodon(t.context.options).postFavourite(t.context.statusUrl),
-    {
-      message: "Request failed with status code 404",
-    }
-  );
+  await t.throwsAsync(mastodon(options).postFavourite(statusUrl), {
+    message: "Unexpected error occurred",
+  });
 });
 
 test("Posts a reblog", async (t) => {
-  nock(t.context.options.serverUrl)
-    .post(`/api/v1/statuses/${t.context.statusId}/reblog`)
-    .reply(200, t.context.apiResponse);
+  const { options, statusId, statusUrl } = t.context;
+  const result = await mastodon(options).postReblog(statusUrl);
 
-  const result = await mastodon(t.context.options).postReblog(
-    t.context.statusUrl
-  );
-
-  t.is(result, `https://mastodon.example/@username/${t.context.statusId}`);
+  t.is(result, `https://mastodon.example/@username/${statusId}`);
 });
 
 test("Throws error posting a reblog", async (t) => {
-  nock(t.context.options.serverUrl)
-    .post(`/api/v1/statuses/${t.context.statusId}/reblog`)
-    .reply(404, { message: "Not found" });
+  const { options, statusUrl } = t.context;
+  options.accessToken = "invalid";
 
-  await t.throwsAsync(
-    mastodon(t.context.options).postReblog(t.context.statusUrl),
-    {
-      message: "Request failed with status code 404",
-    }
-  );
+  await t.throwsAsync(mastodon(options).postReblog(statusUrl), {
+    message: "Unexpected error occurred",
+  });
 });
 
 test("Posts a status", async (t) => {
-  nock(t.context.options.serverUrl)
-    .post("/api/v1/statuses")
-    .reply(200, t.context.apiResponse);
+  const { options, statusParameters, statusId } = t.context;
+  const result = await mastodon(options).postStatus(statusParameters);
 
-  const result = await mastodon(t.context.options).postStatus(t.context.status);
-
-  t.is(result, "https://mastodon.example/@username/1234567890987654321");
+  t.is(result, `https://mastodon.example/@username/${statusId}`);
 });
 
 test("Throws error posting a status", async (t) => {
-  nock(t.context.options.serverUrl)
-    .post("/api/v1/statuses")
-    .reply(404, { message: "Not found" });
+  const { options, statusParameters } = t.context;
+  options.accessToken = "invalid";
 
-  await t.throwsAsync(
-    mastodon(t.context.options).postStatus(t.context.status),
-    {
-      message: "Request failed with status code 404",
-    }
-  );
-});
-
-test.serial("Throws error fetching media to upload", async (t) => {
-  nock("https://website.example").get("/image.jpg").replyWithError("Not found");
-
-  await t.throwsAsync(
-    mastodon(t.context.options).uploadMedia(t.context.media, t.context.me),
-    {
-      message: /Not found/,
-    }
-  );
-});
-
-// Fails as Nock doesn’t send _httpMessage.path value used by form-data module
-test.failing("Uploads media and returns a media id", async (t) => {
-  nock("https://website.example")
-    .get("/image.jpg")
-    .reply(200, { body: getFixture("file-types/photo.jpg", false) });
-  nock(t.context.options.serverUrl).post("/api/v1/media").reply(200, {
-    id: "1234567890987654321",
+  await t.throwsAsync(mastodon(options).postStatus(statusParameters), {
+    message: "Unexpected error occurred",
   });
-  nock(t.context.options.serverUrl).post("/api/v1/media").reply(200, {});
-
-  const result = await mastodon(t.context.options).uploadMedia(
-    t.context.media,
-    t.context.me
-  );
-
-  t.is(result, "1234567890987654321");
 });
 
-// Fails as Nock doesn’t send _httpMessage.path value used by form-data module
-test.failing("Throws error uploading media", async (t) => {
-  nock("https://website.example")
-    .get("/image.jpg")
-    .reply(200, { body: getFixture("file-types/photo.jpg", false) });
-  nock(t.context.options.serverUrl)
-    .post("/api/v1/media")
-    .reply(404, { message: "Not found" });
-
+test("Throws error fetching media to upload", async (t) => {
+  const { me, options } = t.context;
   await t.throwsAsync(
-    mastodon(t.context.options).uploadMedia(t.context.media, t.context.me),
+    mastodon(options).uploadMedia({ url: `${me}/404.jpg` }, me),
     {
-      message: "Request failed with status code 404",
+      message: "Not Found",
     }
   );
 });
 
 test("Returns false passing an object to media upload function", async (t) => {
-  const result = await mastodon(t.context.options).uploadMedia(
-    { foo: "bar" },
-    t.context.me
-  );
+  const { me, options } = t.context;
+  const result = await mastodon(options).uploadMedia({ foo: "bar" }, me);
 
   t.falsy(result);
 });
 
 test("Posts a favourite of a Mastodon status to Mastodon", async (t) => {
-  nock(t.context.options.serverUrl)
-    .post(`/api/v1/statuses/${t.context.statusId}/favourite`)
-    .reply(200, t.context.apiResponse);
-
-  const result = await mastodon(t.context.options).post(
-    {
-      "like-of": t.context.statusUrl,
-    },
-    t.context.me
-  );
+  const { me, options, statusUrl } = t.context;
+  const result = await mastodon(options).post({ "like-of": statusUrl }, me);
 
   t.is(result, "https://mastodon.example/@username/1234567890987654321");
 });
 
 test("Doesn’t post a favourite of a URL to Mastodon", async (t) => {
-  const result = await mastodon(t.context.options).post(
-    {
-      "like-of": "https://foo.bar/lunchtime",
-    },
-    t.context.me
+  const { me, options } = t.context;
+  const result = await mastodon(options).post(
+    { "like-of": "https://foo.bar/lunchtime" },
+    me
   );
 
   t.falsy(result);
 });
 
 test("Posts a repost of a Mastodon status to Mastodon", async (t) => {
-  nock(t.context.options.serverUrl)
-    .post(`/api/v1/statuses/${t.context.statusId}/reblog`)
-    .reply(200, t.context.apiResponse);
-
-  const result = await mastodon(t.context.options).post(
-    {
-      "repost-of": t.context.statusUrl,
-    },
-    t.context.me
-  );
+  const { me, options, statusUrl } = t.context;
+  const result = await mastodon(options).post({ "repost-of": statusUrl }, me);
 
   t.is(result, "https://mastodon.example/@username/1234567890987654321");
 });
 
 test("Doesn’t post a repost of a URL to Mastodon", async (t) => {
-  const result = await mastodon(t.context.options).post(
-    {
-      "repost-of": "https://foo.bar/lunchtime",
-    },
-    t.context.me
+  const { me, options } = t.context;
+  const result = await mastodon(options).post(
+    { "repost-of": "https://foo.bar/lunchtime" },
+    me
   );
 
   t.falsy(result);
 });
 
 test("Posts a quote status to Mastodon", async (t) => {
-  nock(t.context.options.serverUrl)
-    .post("/api/v1/statuses")
-    .reply(200, t.context.apiResponse);
-
-  const result = await mastodon(t.context.options).post(
+  const { me, options, statusUrl } = t.context;
+  const result = await mastodon(options).post(
     {
       content: {
         html: "<p>Someone else who likes cheese sandwiches.</p>",
       },
-      "repost-of": t.context.statusUrl,
+      "repost-of": statusUrl,
       "post-type": "repost",
     },
-    t.context.me
+    me
   );
 
   t.is(result, "https://mastodon.example/@username/1234567890987654321");
 });
 
 test("Posts a status to Mastodon", async (t) => {
-  nock(t.context.options.serverUrl)
-    .post("/api/v1/statuses")
-    .reply(200, t.context.apiResponse);
-
-  const result = await mastodon(t.context.options).post(
+  const { me, options } = t.context;
+  const result = await mastodon(options).post(
     {
       content: {
         html: "<p>I ate a <em>cheese</em> sandwich, which was nice.</p>",
@@ -240,85 +148,30 @@ test("Posts a status to Mastodon", async (t) => {
       },
       url: "https://foo.bar/lunchtime",
     },
-    t.context.me
+    me
   );
 
   t.is(result, "https://mastodon.example/@username/1234567890987654321");
 });
 
-// Fails as Nock doesn’t send _httpMessage.path value used by form-data module
-test.failing("Posts a status to Mastodon with 4 out of 5 photos", async (t) => {
-  nock(t.context.me)
-    .get("/image1.jpg")
-    .reply(200, { body: getFixture("file-types/photo.jpg", false) });
-  nock(t.context.me)
-    .get("/image2.jpg")
-    .reply(200, { body: getFixture("file-types/photo.jpg", false) });
-  nock(t.context.me)
-    .get("/image3.jpg")
-    .reply(200, { body: getFixture("file-types/photo.jpg", false) });
-  nock("https://website.example")
-    .get("/image4.jpg")
-    .reply(200, { body: getFixture("file-types/photo.jpg", false) });
-  nock(t.context.options.url).post("/api/v1/media").reply(200, { id: "1" });
-  nock(t.context.options.url).post("/api/v1/media").reply(200, { id: "2" });
-  nock(t.context.options.url).post("/api/v1/media").reply(200, { id: "3" });
-  nock(t.context.options.url).post("/api/v1/media").reply(200, { id: "4" });
-  nock(t.context.options.url)
-    .post("/api/v1/statuses")
-    .reply(200, t.context.apiResponse);
-
-  const result = await mastodon(t.context.options).post(
+test("Posts a status with photo to Mastodon", async (t) => {
+  const { me, options, photo } = t.context;
+  const result = await mastodon(options).post(
     {
       content: {
         html: "<p>Here’s the cheese sandwiches I ate.</p>",
       },
-      photo: [
-        { url: `${t.context.me}/photo1.jpg` },
-        { url: `${t.context.me}/photo2.jpg` },
-        { url: `${t.context.me}/photo3.jpg` },
-        { url: `${t.context.me}/photo4.jpg` },
-        { url: `${t.context.me}/photo5.jpg` },
-      ],
+      photo,
     },
-    t.context.me
+    me
   );
 
   t.is(result, "https://mastodon.example/@username/1234567890987654321");
 });
 
-test("Throws an error posting a status to Mastodon with 4 out of 5 photos", async (t) => {
-  nock(t.context.me)
-    .get("/photo1.jpg")
-    .reply(200, { body: getFixture("file-types/photo.jpg", false) });
-  nock(t.context.me)
-    .get("/photo2.jpg")
-    .reply(200, { body: getFixture("file-types/photo.jpg", false) });
-  nock(t.context.me)
-    .get("/photo3.jpg")
-    .reply(200, { body: getFixture("file-types/photo.jpg", false) });
-  nock("https://website.example")
-    .get("/photo4.jpg")
-    .reply(200, { body: getFixture("file-types/photo.jpg", false) });
+test("Uploads media and returns a media id", async (t) => {
+  const { me, options, photo } = t.context;
+  const result = await mastodon(options).uploadMedia(photo[0], me);
 
-  await t.throwsAsync(
-    mastodon(t.context.options).post(
-      {
-        content: {
-          html: "<p>Here’s the cheese sandwiches I ate.</p>",
-        },
-        photo: [
-          { url: `${t.context.me}/photo1.jpg` },
-          { url: `${t.context.me}/photo2.jpg` },
-          { url: `${t.context.me}/photo3.jpg` },
-          { url: `${t.context.me}/photo4.jpg` },
-          { url: `${t.context.me}/photo5.jpg` },
-        ],
-      },
-      t.context.me
-    ),
-    {
-      message: "Cannot read properties of undefined (reading 'path')",
-    }
-  );
+  t.truthy(result);
 });
diff --git a/packages/syndicator-mastodon/tests/unit/utils.js b/packages/syndicator-mastodon/tests/unit/utils.js
index 930aa30c7..31ac66c03 100644
--- a/packages/syndicator-mastodon/tests/unit/utils.js
+++ b/packages/syndicator-mastodon/tests/unit/utils.js
@@ -79,7 +79,7 @@ test("Adds link to status post is in reply to", (t) => {
   );
 
   t.is(result.status, "I ate a cheese sandwich too!");
-  t.is(result.in_reply_to_status_id, "1234567890987654321");
+  t.is(result.inReplyToId, "1234567890987654321");
 });
 
 test("Throws creating a status if post is off-service reply", (t) => {
@@ -110,7 +110,7 @@ test("Creates a status with a photo", (t) => {
   );
 
   t.is(result.status, "Here’s the cheese sandwich I ate.");
-  t.deepEqual(result.media_ids, ["1", "2", "3", "4"]);
+  t.deepEqual(result.mediaIds, ["1", "2", "3", "4"]);
 });
 
 test("Gets status ID from Mastodon permalink", (t) => {