Anthropic

Anthropic is a supported AI provider in Clanker. It uses the Anthropic Messages API directly (not through AWS Bedrock).

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Provider Details

Property	Value
Config key	anthropic
Default model	Auto-detected (Clanker queries the Anthropic Models endpoint and uses the latest available model)
API endpoint	https://api.anthropic.com/v1
Auth method	API key

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Configuration

Add the following to ~/.clanker.yaml:

ai:
  default_provider: anthropic
  providers:
    anthropic:
      model: ""
      api_key_env: ANTHROPIC_API_KEY

If you leave the model field empty, Clanker automatically queries the Anthropic API to discover the latest available model. You can also pin a specific model:

ai:
  default_provider: anthropic
  providers:
    anthropic:
      model: claude-sonnet-4-20250514
      api_key: "sk-ant-api03-..."

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Environment Variable

Variable	Description
ANTHROPIC_API_KEY	Anthropic API key

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CLI Flag Overrides

Flag	Description
--ai-profile anthropic	Select this provider
--anthropic-key <key>	Override the API key for this query
--anthropic-model <model>	Override the model for this query

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Usage Example

# Set the key via environment variable
export ANTHROPIC_API_KEY="sk-ant-api03-..."

# Query using Anthropic
clanker ask --ai-profile anthropic "Analyze IAM roles for overpermissive policies"

# Pin a specific model
clanker ask --ai-profile anthropic --anthropic-model claude-sonnet-4-20250514 "What RDS instances are running?"

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Model Fallback Behavior

If the configured model ID is not found by the Anthropic API (HTTP 404), Clanker automatically falls back to the latest available model by querying the /models endpoint. This ensures that Clanker continues to work even when model IDs are retired or updated.