curl --request POST \
  --url https://prod-api.stableyard.fi/v2/payments/{paymentId}/cancel \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "reasonCode": "customer_request",
  "reason": "Requested by partner"
}
'

import requests

url = "https://prod-api.stableyard.fi/v2/payments/{paymentId}/cancel"

payload = {
    "reasonCode": "customer_request",
    "reason": "Requested by partner"
}
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({reasonCode: 'customer_request', reason: 'Requested by partner'})
};

fetch('https://prod-api.stableyard.fi/v2/payments/{paymentId}/cancel', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://prod-api.stableyard.fi/v2/payments/{paymentId}/cancel",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'reasonCode' => 'customer_request',
    'reason' => 'Requested by partner'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://prod-api.stableyard.fi/v2/payments/{paymentId}/cancel"

	payload := strings.NewReader("{\n  \"reasonCode\": \"customer_request\",\n  \"reason\": \"Requested by partner\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Basic <encoded-value>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://prod-api.stableyard.fi/v2/payments/{paymentId}/cancel")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"reasonCode\": \"customer_request\",\n  \"reason\": \"Requested by partner\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://prod-api.stableyard.fi/v2/payments/{paymentId}/cancel")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"reasonCode\": \"customer_request\",\n  \"reason\": \"Requested by partner\"\n}"

response = http.request(request)
puts response.read_body

{
  "payment": {
    "id": "payment_01JY8K4Q6P9A2M7T3W5X8Z1BCR",
    "apiVersion": "2026-09-09",
    "intent": "receive",
    "amountMode": "collect_exact",
    "status": "cancelled",
    "offrampStatus": null,
    "stage": null,
    "operationalState": "normal",
    "operationalReasonCode": null,
    "operationalUpdatedAt": null,
    "statusVersion": 2,
    "paymentAmount": {
      "amount": "25.00",
      "amountAtomic": "25000000",
      "assetType": "crypto",
      "assetCode": "USDC",
      "decimals": 6,
      "chainId": 42161,
      "tokenAddress": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831"
    },
    "participants": [
      {
        "role": "recipient",
        "accountId": "acct_123"
      }
    ],
    "destination": {
      "type": "upa",
      "accountId": "acct_123"
    },
    "settlement": {
      "type": "settlement_destination",
      "settlementDestinationId": "destination_123",
      "destinationType": "connected_wallet",
      "destinationAddress": "0x1111111111111111111111111111111111111111",
      "chainId": 42161,
      "assetCode": "USDC",
      "tokenAddress": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "decimals": 6
    },
    "fees": {
      "version": 1,
      "pricingStatus": "quoted",
      "platformFeeBps": 50,
      "partnerFeeBps": 0,
      "platformFeeAmountAtomic": "125000",
      "partnerFeeAmountAtomic": "0",
      "merchantNetAmountAtomic": "24875000"
    },
    "funding": null,
    "externalReference": "order_1042",
    "description": "Invoice #1042",
    "metadata": {},
    "expiresAt": "2026-08-28T10:10:00.000Z",
    "acceptedAt": null,
    "succeededAt": null,
    "cancelledAt": "2026-08-28T10:02:00.000Z",
    "failure": null,
    "refundSummary": {
      "status": "none",
      "count": 0,
      "requestedAmountAtomic": "0",
      "confirmedAmountAtomic": "0"
    },
    "incidentRecoverySummary": {
      "count": 0,
      "pendingCount": 0,
      "confirmedCount": 0,
      "failedCount": 0,
      "requiresInterventionCount": 0,
      "requestedAmountAtomic": "0",
      "confirmedAmountAtomic": "0"
    },
    "createdAt": "2026-08-28T10:00:00.000Z",
    "updatedAt": "2026-08-28T10:02:00.000Z"
  },
  "nextAction": null
}

{
  "error": {
    "code": "bad_request",
    "message": "The request is invalid",
    "details": "example"
  }
}

{
  "error": {
    "code": "bad_request",
    "message": "The request is invalid",
    "details": "example"
  }
}

{
  "error": {
    "code": "bad_request",
    "message": "The request is invalid",
    "details": "example"
  }
}

{
  "error": {
    "code": "bad_request",
    "message": "The request is invalid",
    "details": "example"
  }
}

{
  "error": {
    "code": "bad_request",
    "message": "The request is invalid",
    "details": "example"
  }
}

{
  "error": {
    "code": "bad_request",
    "message": "The request is invalid",
    "details": "example"
  }
}

{
  "error": {
    "code": "bad_request",
    "message": "The request is invalid",
    "details": "example"
  }
}