modelcontextprotocol / modelcontextprotocol/typescript-sdk

Add custom onError config points for McpError handling

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enhancement needs decision P3 v2
Dominant language
TypeScript
Stars
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Forks
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Avg merge
3d 15h
Merged PRs (30d)
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Description

Add the ability to listen on onError and hook in custom behavior when McpErrors are thrown.

Part of v2 SDK work.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

The issue does not identify any files, tests, or entry points. Start by locating McpError handling and existing error configuration in the TypeScript SDK, then determine the expected hook behavior and add coverage showing that custom behavior runs when an McpError is thrown.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
api
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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