{"version":"2.1.260","anchor":"new-request-header-added-to-anthropic-apibedrock-client-req","canonical_anchor":"bedrockmantle-requests-now-send-an-additional-shared-header","heading":"New shared header block Cv() added to Anthropic\/Bedrock\/Mantle requests","tier":"internal","area":"API Configuration","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.260\/e\/new-request-header-added-to-anthropic-apibedrock-client-req","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.260","markdown":"### New shared header block `Cv()` added to Anthropic\/Bedrock\/Mantle requests\n\nA new default header set is now added to Anthropic\/Bedrock API requests.\n\nOutgoing requests to the Bedrock and Mantle providers, as well as the Anthropic API client, now merge in a new `Cv()` header block on top of the existing `Em()` headers.\n\nThis applies across all auth code paths: API key, skip-auth, profile bearer, AWS bearer-token, and credential-chain paths in Anthropic client construction.\n\n- Area: API Configuration\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 1\/5"}