REST API
Review endpoint and authentication concepts.
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Interpret common HTTP errors and integration problems.
Confirm that the key type matches the client, the key has not expired or been revoked, and browser origins are allowed where required.
Confirm the collection is published and enabled, and that the requested collection or feature identifier is correct.
Respect Retry-After when supplied and reduce request frequency or page size rather than retrying aggressively.
Check HTTPS, CORS policy, network connectivity and whether the requested operation exceeds browser-side limits.
Use this checklist to reduce avoidable integration problems.
Use the related documentation pages to move from concept to a tested development workflow.