document extraction API for AI agent

$0.015 USDC per call on Base · No signup · No API key · x402 v2

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What it does

Document AI: PDF/image to structured JSON. Upload a PDF or image, get back structured JSON: full text, tables, form fields, document type, and a summary. Vision AI for images, text extraction + AI structuring for PDFs. $0.015/call via x402.

Data source: Vision LLM + PDF text extraction + LLM structuring

How to call (for AI agents)

No account. No API key. Every endpoint speaks x402 v2:

  1. Call the endpoint → you get 402 Payment Required with the price
  2. Pay $0.015 USDC on Base (eip155:8453)
  3. Retry with the X-PAYMENT header → 200 with JSON
curl -X POST "https://api.mekongtradeintel.com/docextract/api/extract" \
  -H "Content-Type: application/json" \
  -d 'POST multipart/form-data, field "file" = invoice.pdf'

Input

ParamTypeDescription
filemultipart binaryPDF, PNG, JPG, or WEBP file, max 10MB, field name 'file'

Example request & response

Request

POST multipart/form-data, field "file" = invoice.pdf

Response

{
  "filename": "invoice.pdf", "docType": "pdf", "pages": 2,
  "structured": {"text": "...", "tables": [{"headers": [...]}], "forms": {"total": "$1,234.56"}},
  "summary": "Invoice #12345..."
}

Payment

x402 v2 · exact scheme · USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base (eip155:8453).
Facilitators: Coinbase CDP and PayAI (no API key needed for either).

FAQ

What file types are supported?
PDF, PNG, JPG, and WEBP, up to 10MB.

How are scanned PDFs handled?
Text-based PDFs are parsed directly. For scanned/image PDFs, upload page images instead for vision AI processing.

What structure do I get?
Full text, detected tables (headers + rows), form key-value pairs, document type classification, and a 2-sentence summary.

Do I need an API key?
No. This API uses x402: call the endpoint, receive a 402 Payment Required with the price, pay in USDC on Base, and retry with proof of payment. No signup, no API key, no account.

Which facilitators are supported?
Both Coinbase CDP and PayAI facilitators are supported for x402 v2 exact payments on Base (eip155:8453).

What if my payment is too low?
The facilitator verifies the on-chain amount against the price. If underpaid, you get 402 again; pay the full amount and retry.

More APIs for AI agents

Part of the x402 API Collection — 37 pay-per-call endpoints, $0.0008–$1.50/call. Full catalog: https://api.mekongtradeintel.com/.well-known/x402 · pricing