format_version: 1
name: anthropic
display_name: Anthropic
tier: 1
last_verified: "2026-04-04"
keywords:
  - "sk-ant-api03-"
  - "anthropic"
patterns:
  - regex: 'sk-ant-api03-[A-Za-z0-9_\-]{93,}'
    entropy_min: 3.5
    confidence: high
verify:
  method: GET
  url: https://api.anthropic.com/v1/models
  headers:
    x-api-key: "{KEY}"
    anthropic-version: "2023-06-01"
  valid_status: [200]
  invalid_status: [401, 403]