issues Search Results · repo:mark3labs/mcp-go language:Go
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inmark3labs/mcp-go (press backspace or delete to remove)Description
When using a static token (in my case I m using a GitHub PAT to access the GitHub MCP server), a 401 Unauthorized
response is not handled correctly when calling client.Initialize.
Code Sample ...
dannykopping
- Opened 10 hours ago
- #511
Description
When connecting an MCP client to server via Streamable HTTP under the 2025-06-18 spec, the transport logs an error if
the most recent message cannot be unmarshaled:
https://github.com/mark3labs/mcp-go/blob/38ac77cf9f42386f1beea4f224fa45eb9b08a926/client/transport/streamable_http.go#L399-L402 ...
ethanoroshiba
- Opened yesterday
- #507
Description
At the moment we cannot send the charset in the Content-Type like: Content-Type: application/json; charset=utf-8,
because on server/streamable_http.go, it checks if it s application/json , ...
pedrobrasilborges
- 1
- Opened 3 days ago
- #501
Problem Statement
When using the stdio client, if the server process terminates immediately after startup (e.g., due to parameter
validation errors), the client cannot promptly detect that the process ...
yhuaminghui
- Opened 3 days ago
- #498
Hello team,
I ve encountered an issue where, when accessing raw request headers in tool invocation requests, cookies are
consistently missing—even though all other headers (like Authorization, Content-Type, ...
sunshine555552
- Opened 3 days ago
- #497
Description
The mcp tool I developed has a problem of being called repeatedly.
Logs or Error Messages
Environment
- Go version : go 1.24.0
- mcp-go version: v0.31.0
- OS : Ubuntu24.04
Additional ...
0x032c
- 2
- Opened 4 days ago
- #496
Description
The StreamableHTTPServer implementation in server/streamable_http.go incorrectly treats all HTTP GET requests as
long-lived streaming endpoints, causing it to violate the MCP Streamable HTTP ...
brianredbeard
- 2
- Opened 9 days ago
- #493
Problem Statement
I get better results when an output schema is supported for tools:
https://modelcontextprotocol.io/specification/2025-06-18/schema#tool
Right now it is not supported:
https://github.com/mark3labs/mcp-go/blob/main/mcp/tools.go ...
koh-osug
- Opened 9 days ago
- #490
Summary
A segmentation fault occurs in StreamableHTTP.SendRequest when making an initialize request to a server that returns
HTTP 404. The issue is a nil pointer dereference on line 254 of streamable_http.go. ...
Dumbris
- Opened 16 days ago
- #482
Problem Statement
Clients can use Roots to send information about the directory it s working on, however, this feature is not supported in
mcp-go on server side.
MCP Spec Reference
https://modelcontextprotocol.io/docs/concepts/roots ...
kzwang
- Opened 16 days ago
- #481
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