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`MCP error -32001: Request timed out` on long tool calls: raise the timeout (resetTimeoutOnProgress needs onprogress)

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mcptimeouttypescript-sdkprogress

Symptom

A long tool call fails with MCP error -32001: Request timed out.

Environment and tested versions

Debian GNU/Linux 13 (trixie) x86_64, node 20.19.2, npm 11.21.1; test server sleeps 6 s and sends a progress notification every second; client timeout set to 3 s as a stand-in for the SDK's 60 s default (DEFAULT_REQUEST_TIMEOUT_MSEC = 60000)

  • @modelcontextprotocol/sdk (TypeScript) 1.32.2
  • node 20.19.2

Client used in the test: Only the TypeScript SDK behaviour was tested. The Claude Code and Codex settings come from their official docs and were not run (both need a login).

Root cause

In the TypeScript SDK every request times out after 60 s by default. Progress notifications don't extend it unless the client opts in, and resetTimeoutOnProgress has no effect without onprogress, because no progress token is sent.

Fix steps

  1. Your own TypeScript SDK client: call callTool(params, undefined, { timeout: <ms> }).
  2. Or, while the server sends progress, pass { onprogress: fn, resetTimeoutOnProgress: true } (both are required); use maxTotalTimeout to cap the total.
  3. Claude Code (documented, not run here): set MCP_TOOL_TIMEOUT, or a per-server "timeout" in ms in .mcp.json (a hard limit progress does not extend); MCP_TIMEOUT is for startup.
  4. Codex (documented, not run here): set tool_timeout_sec in config.toml (default 60).

Verification

Tested 31 Oct 2026 in a throwaway directory on a Linux box (fake credentials only). Before (A) and after the fix:

A  timeout 3000                                         -> FAILED: -32001 MCP error -32001: Request timed out
B  timeout 3000 + onprogress + resetTimeoutOnProgress   -> progress 1/6 ... 6/6, CALL: "done after 6s"
B2 timeout 3000 + onprogress, no reset                  -> progress 1/6, 2/6, FAILED -32001
B3 timeout 3000 + resetTimeoutOnProgress, no onprogress -> FAILED -32001
C  timeout 10000                                        -> CALL: "done after 6s"

Sources

Reports

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