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Custom Connector - Dynamic Parameters

Hi there,


We've ran into the issue building a custom connector (full details here 


We want to build a custom connector that will be registered in App Source and will need to dynamically generate parameters to avoid having to Parse JSON after each time the connector/action is used. We have found a sample here ( that should work for us but results in the error.

Really blocked on this, so would appreciate anybody that can help.

Original message from my colleague on GitHub:

I've encountered a problem with Webhook Trigger With Dynamic Parameters.
When I'm trying to save Flow it prompts me with an error message
The response from API 'test-2ddynamic-5f1682ac231a8d2257-5f26430bdda5351998' operation 'GetWebhookResponseSchema' with status code '200' does not contain a valid OpenAPI schema object.

I'm using copy-pasted connector definition from this repo (
My API (also straight from this repo) is hosted under


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