What
New backend provider option enabling Claude Code to connect through Amazon Bedrock's managed Mantle service.
Usage
export CLAUDE_CODE_USE_MANTLE=1
claudeDetails
- Set
CLAUDE_CODE_USE_MANTLEto enable the Mantle provider - Additional env vars:
ANTHROPIC_BEDROCK_MANTLE_BASE_URL,ANTHROPIC_BEDROCK_MANTLE_API_KEY,CLAUDE_CODE_SKIP_MANTLE_AUTH - Uses
bedrock-mantleas the service name with SigV4 authentication - Supports explicit AWS credentials or the standard AWS credential provider chain
- Base URL pattern:
https://bedrock-mantle.{region}.api.aws/anthropic - Mantle endpoints added to all model deployment configurations
- Provider detection centralised into a single function that handles Mantle alongside existing providers (Bedrock, Vertex, Foundry)
- The
ANTHROPIC_BEDROCK_MANTLE_API_KEYis treated as sensitive and masked in logs
Evidence
Provider configuration (search for "Amazon Bedrock (Mantle)", "CLAUDE_CODE_USE_MANTLE", "bedrock-mantle")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agree
Added support for Amazon Bedrock powered by Mantle, set CLAUDE_CODE_USE_MANTLE=1