One integration. Every processor.

create-payment.sh

curl https://finyst.techyst.net/api/payments \
  -H "api-key: $FINYST_SECRET_KEY" \
  -H "Idempotency-Key: ord_10421" \
  -H "Content-Type: application/json" \
  -d '{
    "amount": 6540,
    "currency": "USD",
    "confirm": true,
    "customer_id": "cus_acme_8812",
    "payment_method": "card",
    "payment_token": "tok_9f3a2c71e0b4",
    "profile_id": "checkout-live"
  }'

checkout.ts

// Plain fetch against the Finyst payments API
const res = await fetch("https://finyst.techyst.net/api/payments", {
  method: "POST",
  headers: {
    "api-key": process.env.FINYST_SECRET_KEY,
    "Idempotency-Key": "ord_10421",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    amount: 6540, // minor units
    currency: "USD",
    confirm: true,
    customer_id: "cus_acme_8812",
    payment_method: "card",
    payment_token: "tok_9f3a2c71e0b4",
    profile_id: "checkout-live",
  }),
});

const payment = await res.json();
console.log(payment.status, payment.connector, payment.attempt_count);
// succeeded adyen 2

checkout.py

import os
import requests

res = requests.post(
    "https://finyst.techyst.net/api/payments",
    headers={
        "api-key": os.environ["FINYST_SECRET_KEY"],
        "Idempotency-Key": "ord_10421",
    },
    json={
        "amount": 6540,  # minor units
        "currency": "USD",
        "confirm": True,
        "customer_id": "cus_acme_8812",
        "payment_method": "card",
        "payment_token": "tok_9f3a2c71e0b4",
        "profile_id": "checkout-live",
    },
    timeout=10,
)

payment = res.json()
print(payment["status"], payment["connector"], payment["attempt_count"])
# succeeded adyen 2

Checkout.java

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

var body = """
    {"amount": 6540, "currency": "USD", "confirm": true,
     "customer_id": "cus_acme_8812", "payment_method": "card",
     "payment_token": "tok_9f3a2c71e0b4", "profile_id": "checkout-live"}
    """;

var request = HttpRequest.newBuilder(URI.create("https://finyst.techyst.net/api/payments"))
    .header("api-key", System.getenv("FINYST_SECRET_KEY"))
    .header("Idempotency-Key", "ord_10421")
    .header("Content-Type", "application/json")
    .POST(HttpRequest.BodyPublishers.ofString(body))
    .build();

var response = HttpClient.newHttpClient()
    .send(request, HttpResponse.BodyHandlers.ofString());

System.out.println(response.body());
// {"status":"succeeded","connector":"adyen","attempt_count":2, ...}