feat(langchain-mcp-adapters): gracefully handle connection errors

[gabedemesa]

Add graceful connection error handling to MultiServerMCPClient 🚀

This PR introduces a new handleConnectionErrorsGracefully parameter to the MultiServerMCPClient that allows applications to continue working even when some MCP servers fail to connect. When enabled, the client will skip servers that fail to connect instead of throwing an error, providing better resilience in production environments.

Features

New Configuration Parameter

• handleConnectionErrorsGracefully: boolean (default: false)
  • When true: Skip servers that fail to connect and continue with successful connections
  • When false: Maintain original behavior (throw on any connection failure)
  • Fully backward compatible - existing code continues to work unchanged

Usage

  const client = new MultiServerMCPClient({
    handleConnectionErrorsGracefully: true, // Skip failed connections
    // etc ...
  });

[changeset-bot]

🦋 Changeset detected

Latest commit: 605c9dc

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@langchain/mcp-adapters	Minor

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