Connect Claude Code to tools via MCP changedmcp
Nearest release: v2.1.286, published under an hour after upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Upstream edited this page at 30 Sep 2026 17:00 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 30 Sep 2026 17:07 UTC.
Upstream edited
Recorded here
Lines+1added
Lines−0removed
From line
329
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits52to this page, all time
The whole hunk
from line 329, old and new numbered
/
from line 329
329329* Receives `list_changed` notifications from servers on the newer revision over a [stream it holds open](#notification-streams-on-the-v2-runtime).
330330* Doesn't register a [channel](#push-messages-with-channels) server that connects on the newer revision, because that revision can't carry channel messages.
331331* Fails an [MCP OAuth sign-in](#authenticate-with-remote-mcp-servers) whose authorization response names an unexpected issuer.
332* Sends [MCP OAuth](#authenticate-with-remote-mcp-servers) credentials only to a token endpoint served over HTTPS or at `localhost`, `127.0.0.1`, or `::1`. Sign-in fails for a server whose token endpoint is plain `http://` anywhere else, such as a device on your local network. See [Refusing to send credentials to non-https token endpoint](/docs/en/errors#refusing-to-send-credentials-to-non-https-token-endpoint).
332333
333334Anthropic can keep a specific server on the earlier protocol, or off that stream, with a feature flag Claude Code fetches.
334335
No line in this hunk matches that.