Every tier hits the same deterministic API, pinned to IPD-IMGT/HLA 3.65.0. Prices and billing period are set at checkout; cancel anytime from the Stripe customer portal link in your receipt.
| Tier | Limit | |
|---|---|---|
| Free | 60 req/min per IP, no key required | just start calling the API |
| Starter | 600 req/min per key | Buy Starter |
| Pro | 6,000 req/min per key | Buy Pro |
| Enterprise | uncapped, custom SLA | Contact us |
After payment you'll land on a success page showing your API key once — copy it then, it is also written to your Stripe customer record. Full endpoint reference: /docs.