stancer-node

Node.js / TypeScript client for the Stancer payment API.

Documentation en français

• Zero dependencies — uses native fetch (Node 18+)
• Native TypeScript — full types on all methods and responses
• ESM only
• All resources — payments, cards, SEPA, customers, refunds

Installation

npm install stancer-node

Configuration

import Stancer from 'stancer-node';

const stancer = new Stancer({ apiKey: process.env.STANCER_SECRET_KEY! });

Use a stest_ key for testing, sprod_ for production.

---

Payments

Create a payment

Amounts are always in cents (integer, minimum 50).

const payment = await stancer.payments.create({
  amount: 2990,        // 29.90 €
  currency: 'eur',
  description: 'Pro subscription - January 2026',
  orderId: 'order-2026-001',
  card: {
    number: '4111111111111111',
    expMonth: 12,
    expYear: 2028,
    cvc: '123',
    name: 'John Doe',
  },
});

console.log(payment.id);      // paym_xxxxxxxxxxxxxxxxxxxxxxxx
console.log(payment.status);  // 'to_capture' | 'captured' | ...

Payment with 3DS redirect

const payment = await stancer.payments.create({
  amount: 4900,
  currency: 'eur',
  card: {
    number: '4111111111111111',
    expMonth: 12,
    expYear: 2028,
    cvc: '123',
  },
  auth: { returnUrl: 'https://mysite.com/payment/return' },
});

// Redirect the user to the hosted Stancer payment page
const url = getPaymentUrl(process.env.STANCER_PUBLIC_KEY!, payment.id);
// → https://payment.stancer.com/ptest_xxx/paym_xxx

Deferred capture

// Create without capturing immediately
const payment = await stancer.payments.create({
  amount: 15000,
  currency: 'eur',
  capture: false,
  card: 'card_xxxxxxxxxxxxxxxxxxxxxxxx', // tokenized card ID
});

// Capture later
const captured = await stancer.payments.capture(payment.id);

SEPA payment

const payment = await stancer.payments.create({
  amount: 990,
  currency: 'eur',
  sepa: {
    iban: 'FR7630006000011234567890189',
    name: 'John Doe',
    mandate: 'MANDATE-001',
  },
});

Retrieve a payment

const payment = await stancer.payments.retrieve('paym_xxxxxxxxxxxxxxxxxxxxxxxx');

console.log(payment.status);   // 'captured'
console.log(payment.amount);   // 2990
console.log(payment.currency); // 'eur'
console.log(payment.card);     // { id, last4, brand, expMonth, expYear, ... }

List payments

// Basic list
const { payments, range } = await stancer.payments.list({ limit: 10 });

// Pagination
const page2 = await stancer.payments.list({ limit: 10, start: 10 });

// Filter by orderId or uniqueId
const { payments } = await stancer.payments.list({ orderId: 'order-2026-001' });

console.log(range.hasMore); // true if more pages exist

Idempotency with uniqueId

If a payment with the same uniqueId already exists, the lib automatically returns the existing payment without throwing.

const params = {
  amount: 2990,
  currency: 'eur',
  uniqueId: 'order-2026-001-attempt-1',
  card: 'card_xxxxxxxxxxxxxxxxxxxxxxxx',
};

const payment1 = await stancer.payments.create(params);
const payment2 = await stancer.payments.create(params); // same ID returned
console.log(payment1.id === payment2.id); // true

Refund a payment

// Partial refund
const refund = await stancer.payments.refund('paym_xxxxxxxxxxxxxxxxxxxxxxxx', 1000); // 10.00 €

// Full refund (fetches refundable amount automatically)
const refund = await stancer.payments.refund('paym_xxxxxxxxxxxxxxxxxxxxxxxx');

---

Refunds

// Create a refund
const refund = await stancer.refunds.create({
  amount: 1500,                              // 15.00 €
  payment: 'paym_xxxxxxxxxxxxxxxxxxxxxxxx',
});

console.log(refund.id);     // rfnd_xxxxxxxxxxxxxxxxxxxxxxxx
console.log(refund.status); // 'to_refund' | 'refunded' | ...

// Retrieve a refund
const refund = await stancer.refunds.retrieve('rfnd_xxxxxxxxxxxxxxxxxxxxxxxx');

// List refunds
const { refunds, range } = await stancer.refunds.list({ limit: 20 });

---

Cards

Tokenize a card

const card = await stancer.cards.create({
  number: '4111111111111111',
  expMonth: 12,
  expYear: 2028,
  cvc: '123',
  name: 'John Doe',
  tokenize: true,
});

console.log(card.id);    // card_xxxxxxxxxxxxxxxxxxxxxxxx
console.log(card.last4); // '1111'
console.log(card.brand); // 'visa'

// Use the tokenized card in a payment
const payment = await stancer.payments.create({
  amount: 2990,
  currency: 'eur',
  card: card.id,
});

Retrieve and list cards

const card = await stancer.cards.retrieve('card_xxxxxxxxxxxxxxxxxxxxxxxx');

const { cards, range } = await stancer.cards.list({ limit: 20 });

await stancer.cards.delete('card_xxxxxxxxxxxxxxxxxxxxxxxx');

---

SEPA accounts

// Create a SEPA account
const sepa = await stancer.sepa.create({
  iban: 'FR7630006000011234567890189',
  name: 'John Doe',
  bic: 'AGRIFRPP',      // optional, 8 or 11 characters
  mandate: 'MND-001',   // optional, 3-35 characters
});

console.log(sepa.id);    // sepa_xxxxxxxxxxxxxxxxxxxxxxxx
console.log(sepa.last4); // '0189'

const sepa = await stancer.sepa.retrieve('sepa_xxxxxxxxxxxxxxxxxxxxxxxx');

const { sepa: list, range } = await stancer.sepa.list({ limit: 20 });

await stancer.sepa.delete('sepa_xxxxxxxxxxxxxxxxxxxxxxxx');

---

Customers

// Create a customer
const customer = await stancer.customers.create({
  email: 'john.doe@example.com',
  mobile: '+33612345678',   // optional
  name: 'John Doe',         // optional
  externalId: 'user-123',   // optional — your internal ID
});

console.log(customer.id); // cust_xxxxxxxxxxxxxxxxxxxxxxxx

const customer = await stancer.customers.retrieve('cust_xxxxxxxxxxxxxxxxxxxxxxxx');

const updated = await stancer.customers.update('cust_xxxxxxxxxxxxxxxxxxxxxxxx', {
  name: 'John P. Doe',
  email: 'jp.doe@example.com',
});

const { customers, range } = await stancer.customers.list({ limit: 20 });

await stancer.customers.delete('cust_xxxxxxxxxxxxxxxxxxxxxxxx'); // soft delete

Attach a customer to a payment

const payment = await stancer.payments.create({
  amount: 2990,
  currency: 'eur',
  customer: 'cust_xxxxxxxxxxxxxxxxxxxxxxxx',
  card: 'card_xxxxxxxxxxxxxxxxxxxxxxxx',
});

---

Helpers

isCaptured(payment)

Returns true if the payment is in a finalized captured state (captured or to_capture).

import { isCaptured } from 'stancer-node';

const payment = await stancer.payments.retrieve('paym_xxxxxxxxxxxxxxxxxxxxxxxx');

if (isCaptured(payment)) {
  await confirmOrder(payment.orderId!);
}

getPaymentUrl(publicKey, paymentId)

Generates the URL for the hosted Stancer payment page.

import { getPaymentUrl } from 'stancer-node';

const url = getPaymentUrl(process.env.STANCER_PUBLIC_KEY!, payment.id);
// → 'https://payment.stancer.com/ptest_xxx/paym_xxx'

res.redirect(url);

---

Error handling

import { StancerError } from 'stancer-node';

try {
  const payment = await stancer.payments.create({ ... });
} catch (err) {
  if (err instanceof StancerError) {
    console.error(err.message); // Human-readable message
    console.error(err.code);    // Stancer error code
    console.error(err.status);  // HTTP status (400, 401, 404, 409...)
    console.error(err.body);    // Raw response body
  }
}

---

⚠️ No webhooks — reconciliation required

Stancer does not support webhooks. In production, payment status changes are not pushed to you automatically. Implement a reconciliation job that polls the API regularly.

import { isCaptured } from 'stancer-node';

// Run every 10-15 minutes on pending payments
async function reconcile(pendingPaymentIds: string[]) {
  for (const id of pendingPaymentIds) {
    const payment = await stancer.payments.retrieve(id);

    if (isCaptured(payment)) {
      await db.orders.update({ paymentId: id }, { status: 'paid' });
    } else if (['failed', 'expired', 'refused', 'canceled'].includes(payment.status ?? '')) {
      await db.orders.update({ paymentId: id }, { status: 'failed' });
    }
    // Otherwise: still pending, check again on next cycle
  }
}

---

Payment statuses

Status	Description
authorize	Authorized, deferred capture pending
capture	Capture request in progress
captured	Captured — payment finalized ✅
to_capture	Awaiting capture ✅
canceled	Canceled
disputed	Disputed (chargeback)
expired	Expired
failed	Failed
refused	Refused

Refund statuses

Status	Description
to_refund	Pending processing
refund_sent	Being transmitted to the bank
refunded	Refunded ✅
not_honored	Rejected by the bank
payment_canceled	Original payment was canceled

---

API coverage notes

Not implemented

payments.cancel() — No official Stancer SDK (PHP, Python, Perl) exposes an explicit cancel method. The API does not document a DELETE /checkout/{id} endpoint or a PATCH with status: 'canceled'. The canceled and expired statuses appear to be managed server-side by Stancer only.

PaymentIntents V2 — https://api.stancer.com/v2/ returns 404. The V2 API is not publicly accessible.

Disputes — The disputed status exists in the API but no /disputes/ endpoint is documented or exposed in any official SDK.

Implemented but not testable in stest_ environment

These methods are correctly implemented but the Stancer test environment (stest_) has limitations that prevent automated validation:

Method	Reason
cards.list()	Returns "Nothing matches the given URI" with stest_ keys
sepa.list()	Same behavior
customers.list()	Same behavior
refunds.create() / payments.refund()	Require a payment with captured status — in stest_, payments stay in to_capture (capture is processed asynchronously by Stancer)
refunds.retrieve()	Requires an existing refund

These features have been validated against the official SDK documentation (PHP, Python) and work correctly in production.

---

License

MIT © feelautom