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POST
Call a webhook
Starts a run of a flow that begins with Webhook received. The call answers at once with the run id, before the run has finished. GET works the same way.
No token is needed. The flow id in the address is the only credential, so anyone who knows it can start the flow.

Request

The body may be JSON or text, up to 5 MB. The run receives method, body and query as its trigger data.

Answers

For a flow whose trigger belongs to a plug, the call goes to the plug, which returns zero or more items. The answer then holds the id of the first run, or null when no run started. To wait for the result, use the synchronous address.
Last modified on October 26, 2026