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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.139 11 May 2026

Claude.ai MCP Connector Diagnostics

Claude.ai MCP connector setup now reports clearer disabled states for third-party providers, API-key precedence, and missing user:mcp_servers scope.

Details

Clarifies that claude.ai org connectors are disabled when the inference token lacks MCP scope.
Explicitly says locally configured MCP servers in managed-mcp.json, .claude.json, and .mcp.json are not affected.
Adds clearer provider-specific messages for third-party backends.

Evidence

MCP eligibility messages (search for "[claudeai-mcp] Disabled on third-party provider", "inference token lacks user:mcp_servers scope")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.139 →