Kardinal

Kardinal is a route optimization API rebuilt for AI agents to call directly: typed SDKs, docs an agent can actually read. Built on 10 years of production route optimization, for the constraints that break most "demo" solvers (e.g. capacity-gated returns, self-closing consolidation loops, key-holder-only access windows). Test it entirely on your own: free tier, no sales call, no quote. The most complete API on the market: 93% of constraints covered, per our 2026 benchmark of 11 APIs.