Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
API RequestsArea: what it touches
Internal ChangesKind: in v2.1.286,
Internal ChangesSection of the release
What
A User-Agent header is a line in a web request that says which program sent it. Claude Code now adds one to several requests that used to send none:
the domain safety check before fetching a web page
requests from self-hosted runners
session ingress fetches and saving sessions
the list of claude.ai connectors
sign-in profile and user-role lookups, and other sign-in request headers
requests through the Claude Code remote proxy
The request that lists peer sessions no longer sets its own User-Agent header.
Why
Servers can now tell which of these requests come from Claude Code. If you run a proxy or firewall that filters by User-Agent, these requests will look different.
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtThe exact value Claude Code sends in the header is not stated.
