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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.308 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.243 ·

Gateway loopback escape hatch is still present

Pointing the gateway's key-set URL at a loopback address still needs that environment variable set.

Use it now Internal Changes
JSON All of v2.1.243
Use it nowTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.243,
What probably matters to youSection of the release
What

An earlier reading of this build suggested the check behind CLAUDE_GATEWAY_ALLOW_LOOPBACK had been removed. It has not: the check and its error text are unchanged, so pointing the gateway's key-set URL at a loopback address still requires that environment variable to be set.

Details
  • The code moved position in the bundle rather than being deleted.
  • Without the variable, a loopback target is rejected with the message naming cri.jwks_url.
Evidence

cri.jwks_url targets loopback but CLAUDE_GATEWAY_ALLOW_LOOPBACK is not set

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

Read from
Names in the bundleCLAUDE_GATEWAY_ALLOW_LOOPBACK
Since it was published

The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.

Confirmed since Anthropic's documentation has since written up CLAUDE_GATEWAY_ALLOW_LOOPBACK, on Claude Code changelog. * Improved the Claude apps gateway's loopback error messages to name `CLAUDE_GATEWAY_ALLOW_LOOPBACK` changelog see the edit
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agreesAnthropic's documentation has since written up CLAUDE_GATEWAY_ALLOW_LOOPBACK, on Claude Code changelog.

See this entry in the whole of v2.1.243 →

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