Logic Apps Custom Connector - Error While Trying to Parse Open API Contract

Question

I'm just trying to create a custom connector in Logic Apps. I can create the basics of the connector, but when I try to upload my Open API file I get the error:

"An error happened while trying to parse the Open API contract. Please try again with a valid Open API contract."

I know it is valid JSON I've tested it on multiple validation sites.

If I go into the debugger in Edge (F12) I see a lot of 404 errors:

"GET https://api.powerapps.com/api/invoke 404 (Not Found)"

I've found I get this error before I even try to upload my JSON so I'm thinking this error is preventing me from creating the connector and it's not an issue with the JSON itself.

Any ideas?

Answer 1

Hey,

The 404 error you're seeing ("GET https://api.powerapps.com/api/invoke 404 (Not Found)") seems unrelated to your JSON file. It might be causing the parsing issue.

Here's a quick fix to try:

1. Clear browser cache and cookies.
2. Retry uploading your Open API file.

If the issue persists, it might be a service problem on Microsoft's end. Contact Microsoft Support or check their service status page for updates.

Hope this helps!

Answer 2

Turns out the errors found in debugger mode were not the issue.

Finally stumbled across a blog comment how Logic Apps only supports Open API 2.0 and my file was 3.0

Changed my file to Open API 2.0 and it worked

Would be nice if @Microsoft documented this more prominently and included this in the error message!

Answer 3

@Trey Pogue Thanks for sharing the resolution for the community member. The same is documented in the Prerequisites here.

An OpenAPI definition that describes the example API. When creating a custom connector, the OpenAPI definition must be less than 1 MB. The OpenAPI definition needs to be in OpenAPI 2.0 (formerly known as Swagger) format.