(feat) Add stream-http support #128
Conversation
mcp-hub had stream-http support between itself and mcp-servers, but not between mcp-hub and clients. This commit adds this support and updates the SDK spec version. This is specially important for Codex, which DOOES NOT support SSE at all.
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Pull Request Overview
This PR adds Streamable HTTP transport support for client connections to mcp-hub, implementing the MCP 2025-03-26 specification while maintaining backward compatibility with existing SSE-based clients. This addresses the critical need for Codex client support, which doesn't support SSE.
- Added unified
/mcpendpoint supporting both POST and GET requests with automatic transport detection - Implemented session management with UUID-based session IDs and proper lifecycle callbacks
- Updated MCP SDK from v1.15.1 to v1.20.0 to support new transport features
Reviewed Changes
Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| src/server.js | Added unified MCP endpoint with transport detection logic for Streamable HTTP and legacy SSE |
| src/mcp/server.js | Implemented handleStreamableHTTP method with session management and transport lifecycle |
| package.json | Updated version to 5.0.2 and upgraded MCP SDK and dev dependencies |
| CHANGELOG.md | Added comprehensive changelog entries documenting the new features and fixes |
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I need this as well. Please approve, author. Thank you in advance.. |
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I'm using this in my daily workflow both with SSE and Streamable HTTP clients without issues. I can create a release in my fork while the maintainer is unable to review this PR if anyone's interested. |
Definitely much appreciated to do so. I am using your version of the code. Thank you! |
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Thank you @bcdonadio , using your fork now. |
3 participants
mcp-hub had stream-http support between itself and mcp-servers, but not between mcp-hub and clients. This commit adds this support and updates the SDK spec version.
This is specially important for Codex, which DOES NOT support SSE at all.