This connects Claude to customs.dog's pet travel compliance API. In keyless mode, you can query entry requirements for specific routes and countries (currently focused on US-Mexico corridors) and handle beta signups. With API credentials, it exposes household document management operations like uploading vaccination records, health certificates, and microchip data, then checking them against current CDC and USDA-APHIS rules to get a clearance status (cleared, caution, or blocked). Reach for this when you're building travel planning agents that need to verify pet documents against real border requirements, or when you want Claude to help prep a cross-border trip by checking what's missing or expiring before departure. The service maintains a per-country rules corpus with verification dates, so responses include source attribution.