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Payments & Commerce
Payment, billing and storefront APIs for agents that sell or spend.
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Stripe
Payments platform with APIs for one-off charges, subscriptions, invoicing and Payment Links.
PaidAPI keyLemon Squeezy
Merchant-of-record platform for digital products that handles sales tax and VAT for you.
PaidAPI keyShopify Admin API
GraphQL and REST interfaces for managing products, orders and customers in a Shopify store.
PaidOAuthPayPal Developer
APIs for accepting PayPal and card payments, subscriptions and payouts.
PaidOAuthPaddle
Merchant of record for software sales, handling billing, tax and compliance.
PaidAPI keySquare APIs
Payments, catalog, orders and inventory APIs for in-person and online sellers.
PaidOAuthPolar
Merchant-of-record billing built for developers selling software, subscriptions and digital products.
PaidAPI keyCoinbase Developer Platform
APIs and wallets for onchain payments, including tooling for agents that transact in stablecoins.
Free tierAPI keyx402
Open protocol that revives HTTP 402 so an API can charge small per-request payments from agents.
FreeNo authAdyen
Global payment platform for enterprises with unified online and in-store processing.
PaidAPI keyWise Platform
APIs for international transfers and multi-currency accounts at transparent exchange rates.
PaidOAuthWooCommerce REST API
REST endpoints for managing products and orders in WordPress-based WooCommerce stores.
FreeAPI keyPlaid
Connects apps to users' bank accounts for balances, transactions and identity data.
PaidAPI keyGumroad
Simple storefront for selling digital goods, with a small API for sales and products.
FreeOAuth