diff --git a/db/README.md b/db/README.md
index 03dee881..a97dc30b 100644
--- a/db/README.md
+++ b/db/README.md
@@ -31,9 +31,10 @@ CREATE TABLE `inputs` (
 
 CREATE UNIQUE INDEX `inputsByOutputReference` ON `inputs` (`output_reference`);
 
-CREATE INDEX `inputsByAddress` ON `inputs` (`address` COLLATE NOCASE, `spent_at`);
-CREATE INDEX `inputsByPaymentCredential` ON `inputs` (`payment_credential` COLLATE NOCASE, `spent_at`);
+CREATE INDEX `inputsByAddress` ON `inputs` (`address` COLLATE NOCASE);
+CREATE INDEX `inputsByPaymentCredential` ON `inputs` (`payment_credential` COLLATE NOCASE);
 CREATE INDEX `inputsByCreatedAt` ON `inputs` (`created_at`);
+CREATE INDEX `inputsBySpentAt` ON `inputs` (`spent_at`);
 
 CREATE TABLE `policies` (
   `output_reference` BLOB NOT NULL,
@@ -68,6 +69,12 @@ CREATE TABLE `patterns` (
 
 ## Changelog
 
+<p align="right"><code>v2.5.0</code></p>
+<hr/>
+
+- Remove `spent_at` from compound indexes `inputsByAddress` and `inputsByPaymentCredential`
+- Add permanent index `inputsBySpentAt(spent_at)`
+
 <p align="right"><code>v2.2.0</code></p>
 <hr/>
 
diff --git a/docs/api/v2.3.3.yaml b/docs/api/v2.5.0.yaml
similarity index 98%
rename from docs/api/v2.3.3.yaml
rename to docs/api/v2.5.0.yaml
index 44f3fc70..1ac3643e 100644
--- a/docs/api/v2.3.3.yaml
+++ b/docs/api/v2.5.0.yaml
@@ -5,7 +5,7 @@ servers:
 
 info:
   title: Kupo
-  version: v2.3.3
+  version: v2.5.0
   license:
     name: MPL-2.0
     url: https://raw.githubusercontent.com/cardanosolutions/kupo/master/LICENSE
@@ -279,8 +279,11 @@ info:
          ├─┫ POLICY_ID ┣────┤ . ├─┫ ASSET_NAME ┣─────┤
          │ ┗━━━━━━━━━━━┛    ╰───╯ ┗━━━━━━━━━━━━┛     │
          │ ┏━━━━━━━━━━━━━━┓ ╭───╮ ┏━━━━━━━━━━━━━━━━┓ │
-         └─┫ OUTPUT_INDEX ┣─┤ @ ├─┫ TRANSACTION_ID ┣─┘
-           ┗━━━━━━━━━━━━━━┛ ╰───╯ ┗━━━━━━━━━━━━━━━━┛
+         ├─┫ OUTPUT_INDEX ┣─┤ @ ├─┫ TRANSACTION_ID ┣─┤
+         │ ┗━━━━━━━━━━━━━━┛ ╰───╯ ┗━━━━━━━━━━━━━━━━┛ │
+         │ ┏━━━━━━━━━━━━━━┓                          │
+         └─┫ METADATA_TAG ┣──────────────────────────┘
+           ┗━━━━━━━━━━━━━━┛
     ```
 
     ## Address
@@ -381,12 +384,26 @@ info:
     HEXDIG = %x30–39 / %x41-%46
     ```
 
+    ## Metadata tag
+
+    > <sup><strong>WARNING</strong></sup> <br/>
+    >
+    > This pattern can only be used for indexing, not for querying.
+
+    ```
+    METADATA_TAG =
+
+          ╭───╮  ┏━━━━━━━━━━━━━━┓  ╭───╮
+        ╾─┤ { ├──┫ METADATA TAG ┣──┤ } ├─╼
+          ╰───╯  ┗━━━━━━━━━━━━━━┛  ╰───╯
+    ```
+
     ### Examples
 
-    | Pattern                                                              | Description                                              |
-    | ---                                                                  | ---                                                      |
-    | `*@dca1e44765b9f80c8b18105e17de90d4a07e4d5a83de533e53fee32e0502d17e` | Outputs from a specific transaction                      |
-    | `3@dca1e44765b9f80c8b18105e17de90d4a07e4d5a83de533e53fee32e0502d17e` | The 4th output (0-based indexing) of a given transaction |
+    | Pattern | Description                                                |
+    | ---     | ---                                                        |
+    | `{25}`  | Outputs of any transaction that has metadata with label 25 |
+    | `{42}`  | Outputs of any transaction that has metadata with label 42 |
 
     # Accessing results
 
@@ -1241,6 +1258,7 @@ components:
         - connection_status
         - most_recent_checkpoint
         - most_recent_node_tip
+        - version
       properties:
         connection_status:
           type: string
@@ -1260,6 +1278,9 @@ components:
               description: Absolute slot number of the current tip of the node.
             - type: "null"
               description: Absolute slot number of the current tip of the node.
+        version:
+          type: string
+          description: Current software version.
 
   parameters:
     asset-name:
@@ -2057,7 +2078,8 @@ paths:
                 description: |
                   A key-value export compatible with Prometheus.
 
-                  `connected` and `disconnected` are encoded as `1.0` and `0.0` respectively.
+                  - `connected` and `disconnected` are encoded as `1.0` and `0.0` respectively.
+                  - `version` is not present in the Prometheus metrics.
               examples:
                 response:
                   value: |
diff --git a/docs/index.html b/docs/index.html
index c3647efc..d51d386b 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -126,8 +126,8 @@
   </script>
 
   <div id="versions">
-    <a href="#">v2.3.4</a>
     <a href="#">v2.4.1</a>
+    <a href="#">v2.5.0</a>
     <a href="#">nightly</a>
     <script>
       ;[1,2,3].forEach(ix => {
diff --git a/kupo.cabal b/kupo.cabal
index 44e0569f..ada1f9e3 100644
--- a/kupo.cabal
+++ b/kupo.cabal
@@ -30,8 +30,8 @@ extra-source-files:
     db/v2.2.0/001.sql
 data-files:
     docs/api/latest.yaml
-    docs/api/v2.3.3.yaml
     docs/api/v2.4.1.yaml
+    docs/api/v2.5.0.yaml
 
 source-repository head
   type: git