Extract Certificate Of Origin with Go SDK — OCR Document Extraction

Logistics companies process thousands of Certificate Of Origin documents monthly. Using Go to automate Certificate Of Origin data extraction eliminates manual entry, reduces errors, and speeds up document processing from minutes to seconds. With the Cargoffer OCR API, you can integrate Certificate Of Origin extraction into any Go application in under 10 lines of code.

First, get your free API key from the dashboard. Then install the HTTP client for Go and configure authentication. The API uses Bearer token auth — pass your key in the Authorization header.

Use the POST /api/upload endpoint to send the document file. The system auto-detects Certificate Of Origin format and routes it to the best extraction model. Upload in PDF, image, or Excel format.

certificate_number, exporter, consignee, country_of_origin, country_of_destination, goods, certification_date.

The complete Go integration code handles file upload, extraction request, polling for results, and error management. Error types: 401 (invalid key), 402 (quota exceeded — upgrade your plan), 429 (rate limit — wait and retry), 422 (malformed request).

Each Certificate Of Origin extraction costs from 0.002 EUR per page. The free plan includes 1 page. The Pro plan (49 EUR/month) covers 1,000 pages — enough for 500000 Certificate Of Origin documents. Manual Certificate Of Origin data entry costs 3-15 EUR per document — OCR saves 99%.

See also: [Certificate Of Origin with Python](https://ocr.cargoffer.com/tutorials/documents/certificate-of-origin-extraction/integration/python) | [Certificate Of Origin with JavaScript](https://ocr.cargoffer.com/tutorials/documents/certificate-of-origin-extraction/integration/javascript) | [Certificate Of Origin with Java](https://ocr.cargoffer.com/tutorials/documents/certificate-of-origin-extraction/integration/java) | [Certificate Of Origin via REST API](https://ocr.cargoffer.com/tutorials/documents/certificate-of-origin-extraction)