Gate402 Tools $1 / use

Document checker

Check a file against upload requirements before you submit.

Drop a file or click to uploadMax 40 MB

Target preset Max MB Width Height Card payment

Result

{}

Agent endpoint (x402)

POST returns HTTP 402 Payment Required until paid.

curl -s -X POST https://gate402.app/v1/doc-checker \
  -H 'content-type: application/json' \
  -d '{…}'
# → 402, then retry with PAYMENT-SIGNATURE / X-PAYMENT