https://revenue-sdk.dev Unified TypeScript SDK for billing providers — Polar, Lemon Squeezy, Stripe, Paddle, Dodo Payments https://revenue-sdk.dev/blog/stripe-sdk-alternatives-multi-provider-billing https://revenue-sdk.dev/blog/stripe-sdk-alternatives-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. Thu, 06 Aug 2026 00:00:00 GMT https://revenue-sdk.dev/blog/stripe-polar-lemon-squeezy-paddle-dodo-api-differences https://revenue-sdk.dev/blog/stripe-polar-lemon-squeezy-paddle-dodo-api-differences A field guide to five billing APIs — authentication, request encoding, money, product models, pagination, subscription status, checkout, and webhook signatures. Tue, 04 Aug 2026 00:00:00 GMT https://revenue-sdk.dev/blog/verify-billing-webhook-signatures https://revenue-sdk.dev/blog/verify-billing-webhook-signatures The exact signature scheme for each of five billing providers — headers, signed payload, HMAC key derivation, and encoding — plus the raw-body rule. Fri, 31 Jul 2026 00:00:00 GMT https://revenue-sdk.dev/blog/normalize-subscription-status-across-providers https://revenue-sdk.dev/blog/normalize-subscription-status-across-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. Wed, 29 Jul 2026 00:00:00 GMT https://revenue-sdk.dev/blog/polar-api-typescript https://revenue-sdk.dev/blog/polar-api-typescript A practical walkthrough of the Polar billing API in TypeScript — access tokens, sandbox, products, hosted checkout, subscriptions, portal, and webhooks. Mon, 27 Jul 2026 00:00:00 GMT