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Amazon Bedrock lets you run model inference entirely within your AWS account. Choose this provider if your team is already on AWS, you have Bedrock enabled, or you have compliance requirements that mandate keeping LLM traffic within your cloud boundary.
Bedrock is the LLM provider option that requires AWS — the MergeWatch server itself can still run anywhere (Docker, GCP, Azure, bare metal). Only the LLM API calls go to Bedrock.

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Configuration

Set these environment variables in your .env file or container environment:
VariableRequiredValue
LLM_PROVIDERYesbedrock
AWS_REGIONYesAWS region for Bedrock API calls (e.g. us-east-1)
AWS_ACCESS_KEY_IDConditionalRequired unless using an instance profile
AWS_SECRET_ACCESS_KEYConditionalRequired unless using an instance profile
LLM_MODELNoOverride the default model
If MergeWatch runs on EC2, ECS, or Fargate, you can use an IAM instance profile or task role instead of static credentials. The AWS SDK picks up credentials automatically — just omit AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY.

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Default model

MergeWatch uses us.anthropic.claude-3-5-haiku-20241022-v1:0 by default. This is a cross-region inference profile that routes requests to the nearest available region.

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Bedrock model access

Before using a model, you must enable it in the Bedrock console:
  1. Open the Bedrock Model Access console
  2. Find the Claude model you want to use
  3. Click Request model access if the status is not Access granted
  4. Wait for approval (usually instant for Anthropic models)
If you skip this step, MergeWatch will receive AccessDeniedException errors from Bedrock. Check the Troubleshooting guide if you see these errors.

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Supported regions

RegionRegion code
US East (N. Virginia)us-east-1
US West (Oregon)us-west-2
Europe (Ireland)eu-west-1
Asia Pacific (Tokyo)ap-northeast-1
Asia Pacific (Singapore)ap-southeast-1
Asia Pacific (Sydney)ap-southeast-2

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Cross-region inference profiles

Bedrock supports cross-region inference profiles that automatically route requests to the nearest region with available capacity. These profiles use a geographic prefix:
PrefixCoverage
us.US regions (us-east-1, us-west-2)
eu.European regions (eu-west-1)
ap.Asia Pacific regions (ap-northeast-1, ap-southeast-1, ap-southeast-2)
The default model us.anthropic.claude-3-5-haiku-20241022-v1:0 uses the us. prefix, routing across US regions. If your deployment is in Europe or Asia Pacific, override the model to use the appropriate prefix.

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Model override examples

# US cross-region (default)
LLM_MODEL=us.anthropic.claude-3-5-haiku-20241022-v1:0

# Europe cross-region
LLM_MODEL=eu.anthropic.claude-3-5-haiku-20241022-v1:0

# Asia Pacific cross-region
LLM_MODEL=ap.anthropic.claude-3-5-haiku-20241022-v1:0

# Single-region (no cross-region routing)
LLM_MODEL=anthropic.claude-3-5-haiku-20241022-v1:0

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Next steps

Anthropic (direct)

The default provider — simplest setup, no AWS required.

Configure review behavior

Tune sensitivity, ignored paths, and review focus areas.

Environment variables

Full list of supported environment variables.

Platform guides

Deploy MergeWatch on AWS ECS Fargate.