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v3.9.0 — Remote MCP servers (HTTP)

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@eniz1806 eniz1806 released this 06 Jun 15:21
v3.9.0
fbdc51f

Connect hosted MCP servers, not just local ones.

Added

  • Remote MCP over Streamable HTTP — point /mcp add at a URL: 
    /mcp add linear https://mcp.linear.app/mcp --bearer env:LINEAR_TOKEN
/mcp add api    https://example.com/mcp   --header "X-Api-Key:abc123"
    Handles JSON and SSE responses and reuses the server's session id across calls.
  • Token / header auth: --bearer/--token and repeatable --header K:V; values support env:VAR and file:PATH so secrets aren't typed inline.
  • /mcp list shows each server's transport ([http]/[stdio]). Remote tools work with lazy mode too.

Notes

  • Interactive OAuth login (browser PKCE) is the next increment; this release covers the static-token auth most hosted MCP servers use today.

Tests

  • A real in-process HTTP MCP server end-to-end (start, tool call, session reuse, routing) plus SSE/error/auth tests. 397 total; ruff + CI green.
Assets 2
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