POST /x402/verify - Validate payment without executing

This endpoint validates that a payment proof is authentic and meets the payment requirements, without waiting for blockchain confirmation.

POST /x402/verify

POST /x402/verify - Validate payment without executing

cURL

curl --request POST \
  --url https://api.example.com/x402/verify \
  --header 'Content-Type: application/json' \
  --data '
{
  "paymentHeader": "<string>",
  "paymentRequirements": "<unknown>",
  "x402Version": 1
}
'

200

{
  "isValid": true,
  "invalidReason": "<string>"
}

Body

application/json

paymentHeader · string · required

paymentRequirements · any · required

x402Version · integer<int32> · required

Required range: x >= 0

Response

200 - application/json

Payment verification result

isValid · boolean · required

invalidReason · string | null