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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 v2.1.219

MCP 404 error now shows only the server origin

You'll notice
Useful2 Signal0
MCP

MCP 404 errors now show only the server origin, not the request path you hit.

What

When an HTTP MCP server returns 404 on connect, the error message quotes just the URL origin instead of the full path.

Details
  • previously interpolated the sanitized URL, with query, credentials and hash stripped and the trailing slash removed
  • now interpolates only the origin, so the request path is no longer echoed back in the error
Evidence

Check the URL in your MCP config.

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

See this entry in the whole of v2.1.219 →