Extract Customs Declaration with Go SDK — OCR Document Extraction

Logistics companies process thousands of Customs Declaration documents monthly. Using Go to automate Customs Declaration data extraction eliminates manual entry, reduces errors, and speeds up document processing from minutes to seconds. With the Cargoffer OCR API, you can integrate Customs Declaration 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 Customs Declaration format and routes it to the best extraction model. Upload in PDF, image, or Excel format.

declaration_number, customs_office, exporter, importer, hs_code, goods_description, gross_weight, invoice_value, incoterm, country_of_origin, duties, total_duties.

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 Customs Declaration 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 Customs Declaration documents. Manual Customs Declaration data entry costs 3-15 EUR per document — OCR saves 99%.

See also: [Customs Declaration with Python](https://ocr.cargoffer.com/tutorials/documents/customs-declaration-extraction/integration/python) | [Customs Declaration with JavaScript](https://ocr.cargoffer.com/tutorials/documents/customs-declaration-extraction/integration/javascript) | [Customs Declaration with Java](https://ocr.cargoffer.com/tutorials/documents/customs-declaration-extraction/integration/java) | [Customs Declaration via REST API](https://ocr.cargoffer.com/tutorials/documents/customs-declaration-extraction)