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Error Response Format

All API errors return a JSON response with a detail field:
For validation errors (malformed request body), the response includes field-level details:

HTTP Error Codes

SDK Exception Mapping

The Python SDK maps HTTP errors to specific exception classes:

Common Error Messages

400 Bad Request

401 Unauthorized

403 Forbidden

429 Too Many Requests

Page Concurrency Limit (returned in results, not as an HTTP error)

The page concurrency limit is enforced during processing, not at submission time. Instead of a 429 response, the result will return with success set to false:
See API Limits for details.

Subscription and Access Errors

When making API requests, you may encounter 403 errors related to your subscription status:

No Active Subscription

Error: "You need an active, paid subscription to use this API." This occurs when you don’t have an active subscription and have exhausted your free credits. To resolve:
  • Subscribe to a paid plan in the dashboard
  • New accounts include free credits — verify your email to claim them

Expired Subscription

Error: "Your subscription has expired. You may need to re-enable your plan, or pay an unpaid invoice." Your subscription has passed its end date and grace period. To resolve:
  • Renew your subscription in the dashboard
  • Pay any outstanding invoices

Payment Failed

Error: "Your payment has failed. Please pay any unpaid invoices to continue using the API." A payment for your subscription has failed and you’ve exceeded the grace period. To resolve:
  • Update your payment method in the dashboard
  • Pay any unpaid invoices

Inactive Subscription

Error: "Your subscription is not active. You may need to re-enable your plan or pay an unpaid invoice." Your subscription is canceled or inactive. To resolve:
  • Reactivate your subscription in the dashboard
  • Subscribe to a new plan

Next Steps

Troubleshooting

Detailed debugging guide for common issues

Billing

Per-page pricing, payment failures, and grace periods

API Limits

File size limits, page limits, and rate limiting

SDK Reference

Python SDK with automatic retries and error handling