Deploy Claude Desktop on 3P with Amazon Bedrock Mantle

Configure Claude Desktop on 3P to use Claude models through Bedrock Mantle’s Anthropic-native API surface

Bedrock Mantle is Amazon Bedrock’s Anthropic-native API surface. Unlike the standard Bedrock provider, Mantle speaks the Anthropic Messages API directly and authenticates with a bearer token rather than the AWS SigV4 credential chain, so no AWS CLI, named profile, or IAM Identity Center setup is needed on the device. In practice, Mantle is the Bedrock provider with a different runtime endpoint and a single bearer-token credential path.

Choose an authentication approach

Mantle supports a bearer token only. There is no in-app AWS sign-in or named-profile support for this provider; if you need per-user IAM Identity Center authentication, use the standard Bedrock provider instead.

Scenario	Use	Notes
Any Mantle deployment	Bearer token (inferenceBedrockBearerToken)	A long-lived token distributed in the managed profile.
Token must not be stored statically	Credential helper (inferenceCredentialHelper)	An executable that prints the bearer token to stdout at runtime.

Set up AWS

Enable Claude models in Amazon Bedrock for the region you will set as inferenceBedrockRegion, and obtain a Mantle bearer token for that account. See Set up AWS on the Bedrock page for the model-access step; the IAM Identity Center steps there are not needed for Mantle.

Prepare devices

Bearer token

No per-device preparation is required. Place the Mantle bearer token in the managed configuration as inferenceBedrockBearerToken.

The app reaches bedrock-mantle.<region>.api.aws (or the host in inferenceBedrockBaseUrl if you set one). This host is included automatically in the Egress Requirements section of the in-app configuration window. The .api.aws zone has no FIPS endpoint variant.

Configure the app

Open the in-app configuration window (Developer → Configure third-party inference). In the Connection section, set Inference provider to Bedrock Mantle, then fill in the credentials card:

Field	Value
AWS region	e.g. us-east-1
AWS bearer token	your Mantle bearer token
Bedrock base URL	optional

If you set Bedrock base URL, provide the full SDK base URL including the /anthropic path (for example https://bedrock-mantle.us-east-1.api.aws/anthropic); it replaces the default bedrock-mantle.<region>.api.aws/anthropic endpoint.

Under Models, add at least one Model list entry. Mantle has no model-list endpoint, so model discovery is not available and inferenceModels is required.

Then click Export to produce a .mobileconfig (macOS) or .reg (Windows) file for your MDM. See Deploy with MDM for the export and deployment workflow.

Configuration keys

Mantle reuses the Bedrock key names. Only inferenceBedrockRegion, inferenceBedrockBearerToken, and inferenceBedrockBaseUrl apply; the other Bedrock keys below (inferenceBedrockProfile, inferenceBedrockSso*, inferenceBedrockAwsDir, inferenceBedrockAwsCliPath, inferenceBedrockServiceTier) are ignored for this provider.

Setting	Type	Availability	Default	Description
AWS region inferenceBedrockRegion	string	MDM + Bootstrap	—	AWS region for the Bedrock runtime endpoint.
Bedrock base URL inferenceBedrockBaseUrl	string	MDM + Bootstrap	—	For VPC endpoints or gateway proxies. Host origin only.
Bedrock service tier inferenceBedrockServiceTier	enum	MDM + Bootstrap	—	Sent as the X-Amzn-Bedrock-Service-Tier header. Leave unset for on-demand. One of: flex, priority.
AWS bearer token inferenceBedrockBearerToken	string	MDM + Bootstrap	—	Static bearer token for inference. For providers that support profile or helper-script credentials, prefer those.
AWS SSO start URL inferenceBedrockSsoStartUrl	string	MDM + Bootstrap	—	Enables in-app AWS sign-in (no AWS CLI needed). Set with the three SSO fields below.
AWS SSO region inferenceBedrockSsoRegion	string	MDM + Bootstrap	—	IAM Identity Center home region.
AWS SSO account ID inferenceBedrockSsoAccountId	string	MDM + Bootstrap	—	12-digit AWS account ID assigned to users in IAM Identity Center.
AWS SSO role name inferenceBedrockSsoRoleName	string	MDM + Bootstrap	—	IAM Identity Center permission-set name granting bedrock:InvokeModel* on the account above.
AWS profile name inferenceBedrockProfile	string	MDM only	—	AWS named profile to use for Bedrock inference credentials.
AWS config directory inferenceBedrockAwsDir	string	MDM only	—	Folder with AWS config/credentials. Defaults to ~/.aws when no bearer token is set.
AWS CLI path inferenceBedrockAwsCliPath	string	MDM only	—	Absolute path to the aws executable. Leave unset to find it on PATH.

inferenceBedrockServiceTier details

Tier availability varies by model and region. Reserved capacity uses a provisioned-throughput ARN as the model ID instead of this setting. Older bundled Claude Code CLI versions ignore this key.

You must also set inferenceModels. As with the standard Bedrock provider, server-side Web Search is not supported. See the Configuration reference.

What users experience

The app opens directly on first launch with no user action. Users are never prompted to sign in; re-authentication happens only when you rotate the bearer token in the managed profile.

Troubleshoot

To confirm which keys the app read and whether credentials validated, use Help → Troubleshooting → Copy Managed Configuration Report; see Verifying the deployment for that workflow and the common causes when the app does not enter 3P mode. Application log locations are listed in Data storage and residency.