Adding custom metadata to webhook

Is it possible to attach arbitrary metadata to edits? It would be helpful if when I get a webhook post I could grab a global identifier to find what record the render is associated with.

Yes. You can add parameters to the end of your webhook. Depending on how backend is set up it should pass through those variables.

Example JSON

{
  "timeline": "...",
  "output": "...",
  "callback":"https:/mywebhook.com?id=12345"
}

Lambda endpoint

Below is excerpt from event object from a lambda endpoint.

{
  ...,
  queryStringParameters: { id: '12345' },
  multiValueQueryStringParameters: { id: [ '12345' ] },
  ...
}

Integromat

This also works with Integromat when using custom webhooks.