htjulia f6583b4bad fix(mcp): omit protocol version header on initialize ...

The client sent MCP-Protocol-Version on the initialize request itself.
The spec requires the header on requests after initialization, and the
offered version already travels in the initialize body. A server that
validates the header rejected the handshake unless the client happened
to offer a version it supports, so connecting depended on matching the
error body and only worked for the two versions the client offers.

- Send the header only after initialize succeeds, with the version
  the server negotiated
- Keep the fallback loop, newest-first order and negotiated-version
  persistence for servers that still reject the initialize body version
- Rewrite both version tests around this, including a 2025-03-26-only
  server, and assert that initialize carries no version header

Tags: #mcp
Co-Authored-By: htjulia <htjulia1@gmail.com>

2026-11-03 09:24:05 +09:00

..

client_sse_test.go

feat: support legacy SSE MCP servers (#117)

2026-09-15 00:56:16 +08:00

client_test.go

fix(mcp): omit protocol version header on initialize

2026-11-03 09:24:05 +09:00

client.go

fix(mcp): omit protocol version header on initialize

2026-11-03 09:24:05 +09:00