X-Api-Key: sk_sandbox_xxxxxxxxxxxxxxxxxxxx

curl -X POST https://api-paycentral.gabondunumerique.com/api/v1/payment/initiate \
  -H "X-Api-Key: sk_sandbox_xxxx" \
  -H "Content-Type: application/json" \
  -d '{
  "amount": 5000,
  "currency": "XAF",
  "phone": "237691234567",
  "description": "Commande #123",
  "merchant_reference": "ORDER-123",
  "callback_url": "https://votresite.com/webhooks/paycentral"
}'

{
  "success": true,
  "message": "Paiement initié avec succès",
  "data": {
    "transaction_id": "txn_01HXYZ...",
    "status": "pending",
    "provider": "mtn",
    "amount": 5000,
    "currency": "XAF"
  }
}

{
  "success": false,
  "message": "Clé API invalide ou expirée.",
  "errors": null
}