Integrate with NineLogix

Quick start

1. Get your test Merchant ID, Store ID and one-time test key in Merchant Portal.
2. Use a stable Idempotency-Key for every create request.
3. Send customers to the returned NineLogix checkout_url.
4. Confirm final status through the API or a verified webhook.

curl https://www.ninelogix.com/api/v1/checkout-sessions \
  -H "Authorization: Bearer nlx_test_..." \
  -H "Idempotency-Key: order-demo-001" \
  -H "Content-Type: application/json" \
  -d '{"order_id":"demo-001","price_id":"nlx_price_approved"}'

Authentication & Environments

Use a Bearer API key. Test keys start with nlx_test_ and are limited to approved scopes. Plaintext is shown once and NineLogix stores only a hash. Production credentials require separate approval; test-key creation never opens live transactions.

Webhooks

Events include a unique event_id and timestamp. Verify HMAC-SHA256 over the raw body, reject stale timestamps and compare signatures in constant time. Browser returns never set final payment state. Test Webhook uses encrypted recoverable signing secrets, immutable events and delivery audit; replay redelivers the same event and never retries a payment.

const expected = createHmac("sha256", secret)
  .update(timestamp + "." + rawBody)
  .digest("hex");
// Reject stale timestamps and compare signatures in constant time.

Errors and launch checklist