Order paid, invoice issued

curl -X POST https://app.beel.es/api/v1/invoices \
  -H "Authorization: Bearer beel_sk_test_a1b2c3d4e5f6g7h8" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "STANDARD",
    "recipient": { "customer_id": "550e8400-e29b-41d4-a716-446655440000" },
    "lines": [
      {
        "description": "Monthly subscription",
        "quantity": 1,
        "unit_price": 29.00,
        "discount_percentage": 0
      }
    ]
  }'

Sandbox examples use the beel_sk_test_ prefix. Same code in production — just swap the key.

1. 1

   Customer checks out with tax data

   Your store captures legal name, NIF/CIF and address at checkout. Optionally call /nif/validate before saving to reject malformed tax IDs client-side.

2. 2

   The gateway confirms the payment

   Stripe, Redsys or your processor fires the successful payment webhook. Your backend receives payment_id + order_id and marks the order as paid.

3. 3

   Your backend calls POST /invoices

   Send customer_id, order line items and use order_id as Idempotency-Key. BeeL. generates the invoice, registers it with Verifactu and returns invoice_id.

   Node.js

   import { BeeL } from '@beel_es/sdk';
   
   const beel = new BeeL({ apiKey: process.env.BEEL_API_KEY! });
   
   // Create a draft invoice
   const invoice = await beel.invoices.create({
     type: 'STANDARD',
     recipient: { customer_id: '550e8400-e29b-41d4-a716-446655440000' },
     lines: [
       { description: 'Monthly subscription', quantity: 1, unit_price: 29.00, discount_percentage: 0 },
     ],
   });
   
   // Issue it to assign an invoice number and trigger VeriFactu
   const issued = await beel.invoices.issue(invoice.id);
   console.log(issued.invoice_number); // e.g. "A-2026/0001"

4. 4

   Verify the response with BeeL.'s webhook

   Subscribe to verifactu.status.updated to update the order when the AEAT confirms registration. Constant-time HMAC verification is included in the SDK.

   Node.js

   import express from 'express';
   import { WebhookVerifier } from '@beel_es/sdk';
   
   const verifier = new WebhookVerifier(process.env.BEEL_WEBHOOK_SECRET!);
   
   app.post(
     '/webhooks/beel',
     express.raw({ type: 'application/json' }),
     (req, res) => {
       try {
         const event = verifier.verify(
           req.body.toString('utf8'),
           req.headers['beel-signature'] as string,
         );
   
         // event.type is one of:
         //   'invoice.emitted' | 'invoice.email.sent'
         //   'invoice.cancelled' | 'verifactu.status.updated'
         if (event.type === 'verifactu.status.updated') {
           console.log(event.data.new_status); // 'ACCEPTED' | 'REJECTED'
         }
   
         res.status(200).send('OK');
       } catch {
         res.status(400).send('Invalid signature');
       }
     },
   );

5. 5

   Ship the order and query via API

   The customer already has the PDF. Your logistics ships the order and your dashboard queries GET /invoices to show history, reports and reconciliation.