This is the repository that drives our Widget Foundry.
To test widgets locally, you'll need to create a file called api_key.js in your checked out directory of the repository. In that file, assign your API key to a global variable:
$api_key = "my-api-key-goes-here"
The key is only used for local testing. When a widget is published to the foundry, its request urls will be signed for whichever user is logged in.
With a key file in place you should be able to preview any of the widget HTML sources in a browser, especially the ones with "live" in their filename as they have been tested and are live on our site. (For new widgets, please leave "live" out of the name; we'll add that after it's tested.)
To try out your widget inside the foundry, paste it over the source of any other widget there; just click on its Edit Source link. And when you're finished, send us a pull request!
For any questions about using the foundry or the Meetup API in general, see the the API list.