Power Automate Custom Connector - Token Invalid Invalid Audience

[StuBK]

Hi,

I have built a few custom connectors before but for some reason am having real issues getting a custom connector to authenticate against an api i have written. 

The API is written in .netcore 5, hosted as a WebApp in the same tenant i am trying to connect from. I've checked the authentication setup and the ClientId is pointing to the 37008370 clientid guid in the below image.

I've connected to this API using a blazor app so I think authentication is setup correctly.

When I try and setup the authentication for a custom connector though I get the following response

{
  "content-length": "0",
  "date": "Wed, 20 Oct 2021 10:11:51 GMT",
  "request-context": "appId=cid-v1:4e1e4b6a-ace8-48e9-8121-546d6e834953",
  "www-authenticate": "Bearer error=\"invalid_token\", error_description=\"The audience 'api://37008370-*********' is invalid\"",
  "x-ms-apihub-cached-response": "false",
  "x-powered-by": "ASP.NET"
}

I think I have setup everything correctly and cant see where I am going wrong.

Any help appreciated.

Thanks

Stuart

[murshed]

Pleas confirm your auth mechanism is set up correctly by invoking the API from PostMan first. If that's working you can retry the custom connector.

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