Lucid MCP does not work on Microsoft Copilot Studio

Question

Hi,I’m seeing an issue when setting up the MCP server in Copilot Studio — the available tools are not being listed.This appears to happen when the endpoint is exposed as SSE. Copilot Studio has deprecated support for SSE endpoints. I believe Lucid will need to publish the endpoint as streamable-http instead. That should resolve the issue.I’ve noticed similar behavior with other MCP servers and was able to fix it by switching to streamable-http.

Jake B · Accepted Answer

Hi there! The Lucid MCP server exclusively uses streamable HTTP, and does not support SSE streaming. The error you posted appears to be from making a GET request to the MCP server endpoint, which would attempt to establish an SSE connection, which Lucid’s MCP server does not support. Depending on how you’ve set up the connection in Microsoft Copilot Studio, the error there might be the same error, or a different error.

It looks like Microsoft’s official documentation for connecting to an MCP server is here and here. For authentication type, you should select OAuth 2.0, and under OAuth 2.0, you should select Dynamic Discovery.

If there are additional errors you are seeing in Microsoft Copilot Studio, please let me know!

Jake B · Answer

Yes, Lucid’s MCP server does support API key authentication! https://help.lucid.co/hc/en-us/articles/42578801807508-Integrate-Lucid-with-AI-tools-using-the-Lucid-MCP-server#authenticate-with-an-api-key

The basic steps are: Generate an API key in Lucid’s developer portal. You’ll want to grant the scopes “Edit” for documents and folders, and “View” for your user profile. Then when you configure it in Microsoft Copilot Studio, you’ll use the header “Authorization”, and the key value should be “Bearer your-token” (substituting your api key).

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