REST API / guide 19 of 19
We rate-limit REST API calls to maintain stability and prevent abuse.
Limits are enforced per operation and integration. For example, actor synchronization is limited to five requests per minute per user and API-key creation to ten per hour. Apify, AI, and queue limits can also return `HTTP 429` or `HTTP 503`; clients should respect the response code and retry guidance.
The API currently communicates quota errors in the JSON envelope; do not rely on undocumented `X-RateLimit-*` headers.