MCP server "flow" fails to reconnect - HTTP 400 at flow.team
Preflight Checklist
- [x] I have searched existing issues and this hasn't been reported yet
- [x] This is a single bug report (please file separate reports for different bugs)
- [x] I am using the latest version of Claude Code
What's Wrong?
Bug Description
The "flow" MCP server (https://flow.team/ai/mcp) authenticates
successfully but fails to reconnect every time with HTTP 400.
Steps to Reproduce
- Run /mcp
- Select "flow" server
- OAuth completes ("Authentication successful")
- Claude Code shows: "Got new credentials, but reconnecting to
flow failed: HTTP 400 at https://flow.team"
Tried (all failed with same error)
- Clear authentication → re-authenticate
- Full restart of Claude Code
- claude --debug (no additional detail in log)
Expected Behavior
Server should connect and expose tools after successful auth.
Actual Behavior
"Status: failed", "Issue: SSE error: Non-200 status code (400)"
Auth shows as ✓ authenticated, but connection still fails.
Environment
- Claude Code version: 2.1.263
- OS: Windows
- Server URL: https://flow.team/ai/mcp
- Config location: local (.claude.json, project-scoped)
What Should Happen?
Bug Description
The "flow" MCP server (https://flow.team/ai/mcp) authenticates
successfully but fails to reconnect every time with HTTP 400.
Steps to Reproduce
- Run /mcp
- Select "flow" server
- OAuth completes ("Authentication successful")
- Claude Code shows: "Got new credentials, but reconnecting to
flow failed: HTTP 400 at https://flow.team"
Tried (all failed with same error)
- Clear authentication → re-authenticate
- Full restart of Claude Code
- claude --debug (no additional detail in log)
Expected Behavior
Server should connect and expose tools after successful auth.
Actual Behavior
"Status: failed", "Issue: SSE error: Non-200 status code (400)"
Auth shows as ✓ authenticated, but connection still fails.
Environment
- Claude Code version: 2.1.263
- OS: Windows
- Server URL: https://flow.team/ai/mcp
- Config location: local (.claude.json, project-scoped)
Error Messages/Logs
Steps to Reproduce
Bug Description
The "flow" MCP server (https://flow.team/ai/mcp) authenticates
successfully but fails to reconnect every time with HTTP 400.
Steps to Reproduce
- Run /mcp
- Select "flow" server
- OAuth completes ("Authentication successful")
- Claude Code shows: "Got new credentials, but reconnecting to
flow failed: HTTP 400 at https://flow.team"
Tried (all failed with same error)
- Clear authentication → re-authenticate
- Full restart of Claude Code
- claude --debug (no additional detail in log)
Expected Behavior
Server should connect and expose tools after successful auth.
Actual Behavior
"Status: failed", "Issue: SSE error: Non-200 status code (400)"
Auth shows as ✓ authenticated, but connection still fails.
Environment
- Claude Code version: 2.1.263
- OS: Windows
- Server URL: https://flow.team/ai/mcp
- Config location: local (.claude.json, project-scoped)
Claude Model
None
Is this a regression?
Yes, this worked in a previous version
Last Working Version
_No response_
Claude Code Version
version: 2.1.263
Platform
Anthropic API
Operating System
macOS
Terminal/Shell
Terminal.app (macOS)
Additional Information
_No response_