Usage Metering

Record usage, then try again with the same key — Lumn catches the duplicate and prevents double-billing.

import Lumn from '@lumnsh/stripe';

const lumn = new Lumn(process.env.NEXT_PUBLIC_LUMN_API_KEY);

const customer = await lumn.customers.create({
  external_id: 'user_' + Date.now(),
  email: 'demo@example.com',
  name: 'Demo User',
});

Step 1 - Create customer (customers.create)

Parameter reference

Parameter	Type	Required	Description	Example
external_id	string	Required	Your app's user id (stable, unique).	`user_${Date.now()}`
email	string	Required	Customer email.	demo@example.com
name	string	Required	Customer display name.	Demo User

Interactive UI & Output

Paste your API key above to try

Customize parameters

Provide an existing customer to skip creation. Customize event_name and value for the metering calls.

customer_id

event_name

value