billingsdk-polar

billingsdk-polar

Polar adapter for Billing SDK. Support for checkout, subscriptions, and Svix webhook verification.

Installation

npm install billingsdk-core billingsdk-polar

Usage

import { createBilling, definePlans } from "billingsdk-core";
import { polar } from "billingsdk-polar";

const billing = createBilling({
  adapter: polar({
    accessToken: process.env.POLAR_ACCESS_TOKEN!,
    webhookSecret: process.env.POLAR_WEBHOOK_SECRET,
    organizationId: process.env.POLAR_ORGANIZATION_ID,
  }),
  plans,
});

Capabilities

Feature	Supported
Checkout	✅
Subscriptions	✅
Customer Portal	❌
Usage Billing	❌
Invoices	✅
Plan Sync	✅

Webhook Verification

Verifies Polar webhook signatures using the Svix standard (webhook-id, webhook-timestamp, webhook-signature headers) with HMAC-SHA256.