Mom Factura Webhooks & Status

Receive payment confirmations for deferred Bank Reference payments via webhook with two sequential events. Status polling endpoint available as fallback.

Base URL: https://api.momenu.online Auth: x-api-key header required on all requests.

How It Works

1. Login at momenu.toquemedia.net
2. Go to the Desenvolvedores menu
3. Add your webhook URL
4. Save the configuration

When a payment is confirmed, the API sends two sequential webhook events to your URL:

1. payment.confirmed — Sent immediately after the order status is updated to PAID (before invoice generation). Use this to update the order state in your system.
2. invoice.created — Sent after the invoice PDF is generated and uploaded. Includes the invoiceUrl field with the download link.

Non-paid events (cancelled, failed, error) are sent as a single event without the event field, maintaining backward compatibility.

Webhook Payloads

Event 1: payment.confirmed

{
  "event": "payment.confirmed",
  "merchantTransactionId": "abc123...",
  "ekwanzaTransactionId": "EKZ456...",
  "operationStatus": "1",
  "operationData": { ... }
}

Event 2: invoice.created

{
  "event": "invoice.created",
  "merchantTransactionId": "abc123...",
  "ekwanzaTransactionId": "EKZ456...",
  "operationStatus": "1",
  "operationData": { ... },
  "invoiceUrl": "https://invoice-momenu.toquemedia.net/invoices/..."
}

Non-paid events (no event field)

{
  "merchantTransactionId": "abc123...",
  "ekwanzaTransactionId": "EKZ456...",
  "operationStatus": "3",
  "operationData": { ... }
}

operationStatus values: "1" Paid · "3" Cancelled/Expired · "4" Failed/Refused · "5" Error

Webhook Server Example - Node.js / Express

const express = require("express");
const app = express();

app.use(express.json());

app.post("/webhook/meu-webhook", (req, res) => {
  const { event, merchantTransactionId, operationStatus, invoiceUrl } = req.body;

  switch (event) {
    case "payment.confirmed":
      console.log("Payment confirmed:", merchantTransactionId);
      // Update order state in your system
      break;

    case "invoice.created":
      console.log("Invoice ready:", invoiceUrl);
      // Save invoice URL, send to customer
      break;

    default:
      // Events without "event" field (cancelled, failed, error)
      if (["3", "4", "5"].includes(operationStatus)) {
        console.log("Payment failed:", operationStatus);
      }
  }

  res.status(200).json({ received: true });
});

app.listen(3000);

Webhook Server Example - Python / Flask

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route("/webhook/meu-webhook", methods=["POST"])
def momenu_webhook():
    data = request.json
    event = data.get("event")
    transaction_id = data.get("merchantTransactionId")
    status = data.get("operationStatus")

    if event == "payment.confirmed":
        print(f"Payment confirmed: {transaction_id}")
        # Update order state

    elif event == "invoice.created":
        invoice_url = data.get("invoiceUrl")
        print(f"Invoice ready: {invoice_url}")
        # Save invoice URL

    elif status in ["3", "4", "5"]:
        print(f"Payment failed: {status}")

    return jsonify({"received": True}), 200

Fallback: Status Polling

If webhook delivery fails, use the status endpoint as fallback:

Reference: GET /api/payment/reference/status/:operationId

When paid, it returns invoiceUrl.

async function checkReferenceStatus(operationId) {
  const response = await fetch(
    `https://api.momenu.online/api/payment/reference/status/${operationId}`,
    { headers: { "x-api-key": "YOUR_API_KEY" } }
  );

  const data = await response.json();

  if (data.payment?.status === "paid") {
    console.log("Paid! Invoice:", data.invoiceUrl);
  }

  return data;
}

Notes

• Webhook works for Bank Reference
• Webhook delivery is fire-and-forget (no retries) — implement the status endpoint as fallback
• Your webhook endpoint must return HTTP 2xx to acknowledge receipt
• MCX payments are immediate and do not use webhooks or polling
• Rate limiting: 100 req/min general, minimum 30s interval for Reference polling