Esentire Rate Limits

eSentire publishes no rate limits, and none could be observed. There is no developer documentation to read them from, and the API host emits no rate-limit headers on any response reachable without a token. Response headers on both the 403 and the 401 were inspected directly: the full set is date, content-type, content-length, x-amzn-requestid, strict-transport-security, x-amzn-errortype, x-amz-apigw-id and (on 401) www-authenticate. No RateLimit-*, X-RateLimit-*, Retry-After, or quota header of any kind is present. Whatever throttling AWS API Gateway applies behind the authorization boundary is not signalled to the client at the boundary.