Connect your SaaS to einvoice billing

1The Applications PageHere is your Applications dashboard. This is where you manage every app that connects your SaaS to einvoice billing.▾▶ 0:11

2Create an AppOpen the create application dialog. Each app you register gets its own API key prefix, webhook secret and redirect URLs.▾▶ 0:20

3Name and SlugGive your app a name and a slug. The slug becomes the prefix for every API key you create for this app — keep it short and URL-safe.▾▶ 0:30

4Webhook and Redirect URLsEnter your webhook and redirect URLs. The webhook URL receives signed payment events. Success and cancel URLs tell the SDK where to send the buyer after checkout.▾▶ 0:40

5Save the AppSave the application. Your app is created and the webhook secret appears immediately — you only get one chance to copy it.▾▶ 0:55

Copy Once, Store Safely. The webhook secret is shown exactly once. If you close this box without copying, you will need to regenerate it — and the old one is invalidated immediately.

6Copy the Webhook SecretCopy the webhook secret. Store it as EINVOICE_WEBHOOK_SECRET in your server environment — you will use it to verify every incoming event.▾▶ 1:18

7Dismiss the Secret BoxDismiss and continue. Once dismissed, the secret is gone from the UI. Your environment variable is the only copy.▾▶ 1:30

Now Create an API Key. The API key is what your server sends with every request to einvoice — to create checkout sessions, fetch plan data, and more.

8Create an API KeyCreate a new API key. Give it a descriptive name so you know where it is used — for example, Production server or CI staging.▾▶ 1:49

9Copy the API KeyCopy the key before closing. Store it as EINVOICE_API_KEY in your server environment. Like the webhook secret, it is shown only once.▾▶ 1:58

10DoneDismiss and see the key in the list. The key appears in the list with its prefix and status. The full value is gone — only your environment variable holds it.▾▶ 2:09