{"name":"ANTHROPIC_BEDROCK_MANTLE_BASE_URL","slug":"anthropic-bedrock-mantle-base-url","family":"env","title":"Environment variables","noun":"environment variable","description":"Override the Amazon Bedrock Mantle endpoint URL. See [Mantle endpoint](\/docs\/en\/amazon-bedrock#use-the-mantle-endpoint)","description_source":"docs","described_by":{"doc":"claude-code\/env-vars","title":"Environment variables"},"presence":{"first_seen":"2.1.138","removed_in":null,"in_current_build":true,"newest_mined":"2.1.309","builds":150,"mined_builds":150,"first_cited":{"version":"2.1.223","released_at":"2026-08-05 22:51:13","spans":1}},"aliases":[],"entries":[{"version":"2.1.237","anchor":"system-prompt-caching-now-requires-a-recognised-endpoint","heading":"System prompt caching now requires a recognised endpoint","line":"If you point Claude at a proxy or custom gateway, the system prompt is no longer cached.","released_at":"2026-08-19 23:57:54","reason":"named in this entry, found in this entry's text"},{"version":"2.1.223","anchor":"policy-settings-environment-stripping-is-case-insensitive","heading":"Policy-settings environment stripping is case-insensitive","line":"Environment variables your org policy blocks can no longer sneak through by changing their capitalization.","released_at":"2026-08-05 22:51:13","reason":"found in this entry's text"},{"version":"2.1.94","anchor":"amazon-bedrock-mantle-provider","heading":"Amazon Bedrock (Mantle) Provider","line":null,"released_at":"2026-04-07 21:04:05","reason":"found in this entry's text"}],"entries_total":3,"docs":[{"source":"claude-code","path":"env-vars","title":"Environment variables","documented":true},{"source":"claude-code","path":"amazon-bedrock","title":"Claude Code on Amazon Bedrock","documented":false}],"docs_total":2,"gates":[],"related":[{"name":"ANTHROPIC_BEDROCK_BASE_URL","slug":"anthropic-bedrock-base-url","description":"Override the Amazon Bedrock endpoint URL. Use for custom Amazon Bedrock endpoints or when routing through an [LLM gateway](\/docs\/en\/llm-gateway). See [Amazon Bedrock](\/docs\/en\/amazon-bedrock)"},{"name":"ANTHROPIC_BEDROCK_REGION_PREFIX","slug":"anthropic-bedrock-region-prefix","description":"Cross-region inference profile prefix (`us`, `eu`, `apac`, `jp`, `au`, or `global`) Claude Code tries first instead of the one derived from the AWS region. Ignored in AWS GovCloud regions. Requires Claude Code v2.1.224 or later. See [Amazon Bedrock](\/docs\/en\/amazon-bedrock#cross-region-inference-profile-prefixes)"},{"name":"ANTHROPIC_BEDROCK_SERVICE_TIER","slug":"anthropic-bedrock-service-tier","description":"Amazon Bedrock [service tier](https:\/\/docs.aws.amazon.com\/bedrock\/latest\/userguide\/service-tiers-inference.html) (`default`, `flex`, or `priority`). Sent as the `X-Amzn-Bedrock-Service-Tier` header. See [Amazon Bedrock](\/docs\/en\/amazon-bedrock#service-tiers)"}],"url":"https:\/\/changelogs.core-directive.com\/reference\/env\/anthropic-bedrock-mantle-base-url","family_url":"https:\/\/changelogs.core-directive.com\/reference\/env.json"}