Question about workers-mcp and "Unsupported content type: undefined" error
I've been experiencing issues using my deployed mcp servers from Claude Desktop. When I make an http request to the server, the server returns a json object with the expected format. When I try to call a tool in my Claude client, and can see from the logs using wrangler tail that a successful post request was made. However, no matter what I try, I keep seeing a "Unsupported content type: undefined" error. Does anyone have any experience building mcp servers using workers-mcp and know the proper way to format the response so Claude can interpret it?
Welcome to the official Cloudflare Developers server. Here you can ask for help and stay updated with the latest news
85,042Members
Resources
Similar Threads
Was this page helpful?
