Hi!
I’m not sure if this is the right place for troubleshooting, if it isn’t then please point me to the right place! I have setup the MCP in codex via the url provided in MCP: https://design.penpot.app/mcp/stream?userToken= (where I added the generated MCP token in the userToken query parameter), and also provided the required PAT token via environment variable. I also opened the file of interest in Penpot in Firefox, The menu shows that the MCP plugin is enabled. The MCP connects properly in codex and exposes the tools, but when I try to make a tool call (“Tell me what’s present in the file opened in penpot”), it always results in Error: No plugin instance connected for user token. Please ensure the plugin is running and connected with the correct token.. I have tried changing the MCP token (which is added in the MCP server url) several times & updated the url in codex accordingly, but the error persists. I also took caution into ensuring that I’m copying the MCP token correctly.
I also used an online MCP playground that tests MCP servers (https://mcpplaygroundonline.com/mcp-test-server) - it also connects properly but gives the same error on a valid tool call.
