❓ 8. FAQ & Troubleshooting

How long does it take to process a document?
Typically under 5 seconds for synchronous flows; under 1 minute for async sessions.

What document formats are supported?
PDF, JPG, PNG. Files must not exceed 10MB per document.

How do I know if a document passed validation?
The /preprocess endpoint returns a structured verdict object:

json
"verdict": { "boolean": true, "value": "Document passes all KYB checks" }

How do I identify extraction failures?
Use the extracted_data block in the /extract response. Missing fields or null values typically indicate OCR or formatting issues.

How many documents can I upload per session?
You can upload only one file per document type per session. If you upload a new file of the same type, it will replace the previous one. Preprocessing and extraction will always run on the most recently uploaded document.

Can I test this API in a sandbox environment?
Yes. Contact the Zenpli team for sandbox credentials.