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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.

← All of v2.1.251 Home All releases ←olderv2.1.250

Claude Code v2.1.251 28 Aug 2026

Cloud routines explain in more detail why a connector is missing

You'll notice

Useful3 Signal2

MCP

When a cloud routine can't load a connector, you now see the specific reason.

What

The text telling Claude which MCP connectors a cloud routine can use now names the specific reason a connector was not loaded, instead of leaving it unexplained.

Details

Reasons covered separately: organization lockdown, a restricted account, opting out via disableClaudeAiConnectors or ENABLE_CLAUDEAI_MCP_SERVERS, safe mode, and a missing OAuth scope.
Duplicate connector display names are deduplicated, and connectors suppressed because they duplicate a manually configured MCP server are called out as such.

Evidence

Loading of claude.ai connectors is disabled in this Claude Code session by the organization's managed MCP configuration

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

See this entry in the whole of v2.1.251 →