Rate limits & quotas
Limits apply per API key.
| Plan | Endpoints | Sustained rate | Burst | Daily quota |
|---|---|---|---|---|
| Free trial | Single title only | 1 request/second | 2 requests | 100 requests |
| Standard | Single title and batch | 10 requests/second | 20 requests | 100,000 requests |
Exceeding a limit returns 429 Too Many Requests. Back off and retry.
Standard customers classifying large volumes should prefer the
batch endpoint. One batch request of 500
titles counts as a single request against the quota. The batch endpoint
returns 403 Forbidden when called with a free trial key.
Operational characteristics
Section titled “Operational characteristics”- Typical latency is single-digit milliseconds per request; cold starts add ~300–600 ms infrequently.
- Maximum request processing time is 10 seconds; in practice even a full 500-title batch completes in well under a second.
- Titles are processed in memory only and are not persisted.