API Reference

Start payment

REST equivalent of startBSCPayment, startPolygonPayment, startBasePayment, and startSOLPayment.

POSThttps://api.argonpay.app/payPOST /pay

Merchant REST wrapper that starts a pending payment on the selected network.

Without auth (apiKey / Bearer): maps to per-network starters:

`network`	GraphQL mutation
`bep20` / `bsc`	`startBSCPayment`
`polygon` / `matic`	`startPolygonPayment`
`base`	`startBasePayment`
`sol` / `solana`	`startSOLPayment`

With `apiKey` or `Authorization`: uses StartPayment.

Credit top-up txns (purpose: credit_topup): uses UserStartCreditTopup (no auth).

Debits 1 credit from the transaction owner's API key when started (merchant payments).

Endpoint

POST https://api.argonpay.app/pay

Content-Type: application/json

Body

Name	Type	Required	Description
`txnid`	string	Yes	Pending transaction ID
`network`	string	Yes	`bep20`, `bsc`, `polygon`, `matic`, `base`, `sol`, or `solana`
`token`	string	No	`USDT` or `USDC` (EVM only)
`apiKey`	string	No	Use unified `StartPayment` when provided

Example

curl -X POST https://api.argonpay.app/pay \
  -H 'Content-Type: application/json' \
  -d '{"txnid":"YOUR_TXNID","network":"bep20","token":"USDT"}'

GraphQL equivalents

Start payment

curl --request POST \
  --url 'https://api.argonpay.app/pay' \
  --header 'Content-Type: application/json' \
  --data '{"txnid":"YOUR_TXNID","network":"bep20","token":"USDT","apiKey":"YOUR_API_KEY"}'

{
  "data": {
    "POST /pay": {
      "code": 200,
      "message": "OK"
    }
  }
}

Response fields

Types for values returned by this operation.

codeInt

HTTP-style status code for the operation result.

messageString

Human-readable result message.

transaction.txnidString

Unique payment / order identifier.

transaction.amountFloat

Requested payment amount.

transaction.amountInTokenFloat

Amount denominated in the selected token, when started.

transaction.tokenString

Stable token symbol such as USDT or USDC.

transaction.networkNetwork

Selected chain enum: BEP20, POLYGON, BASE, or SOL.

transaction.statusTransactionStatus

PENDING, STARTED, COMPLETED, EXPIRED, or CANCELLED.

transaction.wallet.addressString

Deposit address for the payment.

transaction.countdownInt

Seconds remaining before expiry, when available.

transaction.hashString

On-chain transaction hash after payment detection.

transaction.blockchainLinkString

Explorer URL for the payment transaction.

transaction.isExpiredBoolean

Whether the payment window has expired.

transaction.expiresAtString

ISO-8601 expiry timestamp.

transaction.createdAtString

ISO-8601 creation timestamp.

POST · https://api.argonpay.app/pay