Adapters

Use your existing billing provider. Your code stays the same.

Available adapters

Adapter	Status	Description
Stripe	Stable	Full Stripe Billing integration
Polar	Stable	Polar.sh subscription support
Mock	Stable	Testing without a real provider

How adapters work

Each adapter implements the same interface:

interface BillingAdapter {
  getEntitlement(userId: string): Promise<Entitlement | null>;
  parseWebhook(body: string, signature: string): Promise<BillingEvent>;
}

Swap providers by changing one line:

import { createEnhancedClient } from "@fuime/billing-sdk";
import { stripe } from "@fuime/billing-sdk/stripe";
// import { polar } from "@fuime/billing-sdk/polar";

const billing = createEnhancedClient({
  provider: stripe({ apiKey: process.env.STRIPE_KEY }),
  // provider: polar({ accessToken: process.env.POLAR_TOKEN }),
  // ...
});