The gateway

Every call reaches the gateway first, and it applies these limits before the hub sees the call: EPX0080 and EPX0082 carry their back-off in error_params[0] (milliseconds) and in a Retry-After header (seconds), EPX0081 in Retry-After only. Every call whose credential is accepted reports its budget in RateLimit-Limit, RateLimit-Remaining and RateLimit-Reset (Conventions — rate-limit headers). The pool sizes are set for your organization.

The hub

The values are the hub’s defaults; the production hub’s values are those of its deployment configuration. The per-organization limit covers the three quote routes in one bucket and POST /order / /order/openfor in another, charged after validation and before any work; every other route has no hub-level limit. How to read EIN0080 and the gateway’s 429, and how to stay under both: Handling rate limits.

See also