API – Create a payment

Create payment

Create a payment link for paying for your service

URL

POST

https://api.fps.pro/invoices/create

Request formatapplication/json

`amount` required number	Payment amount in the selected fiat currency
`currency` required string	Accepted fiat currency (see the fiat list)
`order_id` string	Order ID in your system
`network` string	You can specify the network where payment must be accepted, or leave the field empty to accept payment in any available network
`webhook_link` url	URL where the payment status will be returned Default: merchant settings
`success_link` url	URL where the client will be redirected after a successful payment Default: merchant settings
`error_link` url	URL where the client will be redirected after an unsuccessful payment Default: merchant settings
`part_payment` boolean	You can allow or prohibit partial payment within a single payment Default: true or merchant settings
`ignore_client_amount` boolean	If you set this value to True, any amount paid by your client will successfully complete the invoice Default: false or merchant settings
`payment_accuracy` number	Specify a percentage value from 1 to 100. If you set 5 for a $100 payment, then when the client pays $95, the payment will be considered successful and completed Default: 0 or merchant settings
`fee` number	A value from 1 to 100 that adds a percentage-based fee to the payment Default: 0
`discount` number	A value from 1 to 100 that applies the specified discount percentage to the payment Default: 0
`additional_info` string	Any information
`auto_convert` boolean	Automatically convert the payment after it is received Default: false

Response formatdata object

`id` uuid	Invoice ID
`info.currency` string \| null	Fiat currency code of the invoice
`info.token` string \| null	Payment token
`info.network` string \| null	Payment network
`info.address` string \| null	Wallet address for payment
`amount.starting_price` number	Initial invoice amount in fiat
`amount.discount_percent` number	Discount amount as a percentage
`amount.merchant_fee_percent` number	Merchant fee as a percentage
`amount.service_fee_percent` number \| null	Platform service fee as a percentage
`amount.total` number	Final amount after discount and fee
`url.webhook` url \| null	Merchant Webhook URL
`url.success` url \| null	Redirect URL after successful payment
`url.error` url \| null	Redirect URL after failed payment
`url.payment` url	Payment page link
`options.part_payment` boolean	Whether partial payment is allowed
`options.ignore_client_amount` boolean	Whether the exact client amount is ignored
`options.payment_accuracy` number	Allowed payment tolerance
`additional.order_id` string \| null	External order ID
`additional.info` string \| null	Additional order information
`status` string	Current invoice status
`expired_at` string (ISO 8601, UTC)	Invoice expiration date
`created_at` string (ISO 8601, UTC)	Invoice creation date

Request examples

curl --request POST 'https://api.fps.pro/invoices/create' \
  --header 'Content-Type: application/json' \
  --header 'X-Client-Id: YOUR_CLIENT_ID' \
  --header 'X-Timestamp: 1720000000' \
  --header 'X-Signature: YOUR_HMAC_SHA256_SIGNATURE' \
  --data '{
  "amount": 150.75,
  "currency": "usd",
  "order_id": "ORD-1001",
  "network": "tron",
  "webhook_link": "https://merchant.example.com/webhooks/fps",
  "success_link": "https://merchant.example.com/payments/success",
  "error_link": "https://merchant.example.com/payments/error",
  "part_payment": true,
  "ignore_client_amount": false,
  "payment_accuracy": 0,
  "fee": 1.5,
  "discount": 3,
  "additional_info": "Premium subscription",
  "auto_convert": false
}'

Successful response

{
  "status": 201,
  "message": "invoice created",
  "data": {
    "id": "0a718b02-138d-495a-9661-39ca52139c07",
    "info": {
      "currency": "USD",
      "token": null,
      "network": null,
      "address": null
    },
    "amount": {
      "starting_price": 1000,
      "discount_percent": 0,
      "merchant_fee_percent": 10,
      "service_fee_percent": 1,
      "total": 1100
    },
    "url": {
      "webhook": "https://merchant.example/webhook",
      "success": "https://merchant.example/success",
      "error": "https://merchant.example/error",
      "payment": "https://frontend.example/0a718b02-138d-495a-9661-39ca52139c07"
    },
    "options": {
      "part_payment": true,
      "ignore_client_amount": false,
      "payment_accuracy": 0
    },
    "additional": {
      "order_id": "1",
      "info": ""
    },
    "status": "init",
    "expired_at": "2026-01-05 14:30:43",
    "created_at": "2026-01-05T13:30:43.000Z"
  }
}

Errors

Detailed authorization errors are listed in Authorization - Errors

{
  "status": 422,
  "message": "Validation Error",
  "errors": [
    {
      "field": "currency",
      "message": "currency is required"
    }
  ]
}

{
  "status": 500,
  "message": "Internal Server Error"
}