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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 v2.1.45 17 Feb 2026

URL Elicitation for MCP Tools

What

MCP tools can now request that users open a URL (e.g., for OAuth flows) and wait for completion before continuing.

Details

Supports error code -32042 for URL elicitation requests
Shows the URL to the user with options to "Reopen URL", "Continue without waiting", or "Skip confirmation"
Handles completion notifications from MCP servers when the user finishes the URL flow
If the user cancels, the tool receives a message explaining the cancellation

Evidence

URL elicitation handler (search for "requires URL elicitation (error -32042")

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

See this entry in the whole of v2.1.45 →