Follow Discord
Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeReleasesv2.1.228entry #54

Claude Code v2.1.228 ·

Bundled SDK client reads a webhook signing key from the environment

The bundled client now reads a webhook signing key from ANTHROPIC_WEBHOOK_SIGNING_KEY.

Use it now Notable No documentation found New Features
JSON All of v2.1.228
Use it nowTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
SDKArea: what it touches
New FeaturesKind: in v2.1.228,
What probably matters to youSection of the release
What

The bundled Anthropic client constructor now takes a webhookKey option that defaults to the ANTHROPIC_WEBHOOK_SIGNING_KEY environment variable, or null when it is unset. Previously that variable appeared only in bundled documentation and no client code read it.

Details
  • Set ANTHROPIC_WEBHOOK_SIGNING_KEY to have it picked up automatically; passing webhookKey explicitly overrides it.
Evidence

ANTHROPIC_WEBHOOK_SIGNING_KEY

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

Read from
Names in the bundleANTHROPIC_WEBHOOK_SIGNING_KEYwebhookKey

See this entry in the whole of v2.1.228 →

Feedback