Why am I getting an Internal Server Error when trying to connect to Pipedream's MCP for my project?

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1

This topic was automatically generated from Slack. You can find the original thread here.

Hello! I am trying to connect to Pipedream’s MCP for a connection I created for one of my projects, but I am always getting this error:

Failed to connect to Pipedream MCP server:
Error POSTing to endpoint (HTTP 500): !DOCTYPE html <html lang="en"> <head> <meta charset="utf-8"> <title>Error</title> </head> <body> <pre>Internal Server Error</pre> </body> </html>
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Here’s how I’m handling the MCP connection, where it is always falling into the catch statement

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I have double-checked it, and the app slug, oauth app id and external user id’s are correct and the same ones generated in my Pipedream project

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I’m using ‘development’ as pipedream environment though

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It does seem to work for the Notion connection, for some reason, but not for any other app I have tried like Slack, Google Drive or Google Docs.

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accounts are correctly connected to the external user id in the project

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any idea why is it always failing?

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Do you actually have an oauthAppId associated w/ all of those apps you’re trying to connect to?

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yes! and it’s the same value as the id from Pipedream’s Accounts ui

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That happens for every app? Can you give me an example app you get that 500 for?

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Here’s an example on Google Drive. As you can see, I am using the right values for every header

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I have tried a few apps:
• Notion (oauth) and Telegram (api key) do work
• Google Drive, Google Docs, Slack (all oauth) don’t

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hmmm actually, Notion did work yesterday but it’s not working now :thinking_face:

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it looks like it may be failing on all apps connected with Oauth

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I do have stored the oauthAppId returned when creating the connection, and I am including it as a header in the StreamableHTTPClientTransport

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Oh, removing the x-pd-oauth-app-id fixes the issue

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I see, this is for the custom Oauth, right?

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Which I am not using

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However, then I do have an issue

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What if the same user has two connected Drive accounts, for example

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