Blog
Guides and deep dives on building against the Stripe, Polar, Lemon Squeezy, Paddle, and Dodo Payments billing APIs from TypeScript.
Stripe Managed Payments: Stripe as Merchant of Record, Explained
Stripe became a merchant of record in 2026. What Managed Payments changes, the one flag that enables it, the parameters it rejects, and how it compares.
Stripe SDK Alternatives for Multi-Provider Billing
How the official Stripe SDK, per-provider SDKs, and a unified SDK compare when one app must support Stripe, Polar, Lemon Squeezy, Paddle, and Dodo.
Stripe vs Polar vs Lemon Squeezy vs Paddle vs Dodo: How Their Billing APIs Differ
A field guide to five billing APIs — authentication, request encoding, money, product models, pagination, subscription status, checkout, and webhook signatures.
How to Verify Webhook Signatures from Stripe, Polar, Lemon Squeezy, Paddle, and Dodo
The exact signature scheme for each of five billing providers — headers, signed payload, HMAC key derivation, and encoding — plus the raw-body rule.
How to Normalize Subscription Status Across Billing Providers
Why "canceled" means different things on Stripe, Polar, Lemon Squeezy, Paddle, and Dodo — and how to write one entitlement check correct on all five.
How to Use the Polar API from TypeScript
A practical walkthrough of the Polar billing API in TypeScript — access tokens, sandbox, products, hosted checkout, subscriptions, portal, and webhooks.