Limits
| What | Limit |
|---|---|
| Request body | 1 MB |
| Requests, live mode | 600 per minute per account |
| Requests, test mode | 120 per minute per account |
| File size, as uploaded | 100 MB |
| Question paper, marking scheme | One PDF each, up to 50 pages; together under 15 MB after our compression |
| Answer script | One PDF or 1 to 50 images; up to 50 pages; under 12 MB after our compression |
| Image dimensions | At least 200 pixels on each side |
title, filename |
255 characters |
student.name, review link reviewer |
100 characters |
external_id, student.external_id |
128 characters |
grading.instructions |
5,000 characters |
metadata |
20 keys; keys up to 40 characters, values up to 500 |
Idempotency-Key |
255 characters; kept for 24 hours |
| List page size | 1 to 100 items, default 20 |
| Upload URL | Valid for 1 hour |
| Unused file | Deleted 24 hours after creation, or 24 hours after release from a failed or cancelled object |
| Linked document | Must start responding within 30 seconds; must stay valid for 1 hour; up to 3 redirects |
| Our processing time | 24 hours, then processing_timeout |
| Review link | 1 to 24 hours, default 24 |
| Report link | Valid for 15 minutes |
| Webhook endpoints | 5 per mode |
| Webhook response | 2xx within 10 seconds |
| Webhook retries | Up to 3 days |
| Webhook signature | t within 5 minutes of your clock |
| Event retention | 30 days |
To discuss a higher limit, contact us.