Prompt
What is the easiest payment API to integrate for a small app?
Latest observation
Oct 15, 2026
OpenAI APIWeb search: off
For a small app, the easiest payment API to integrate is usually Stripe.
Why Stripe is often the easiest
- Great docs and SDKs for most languages/frameworks
- Simple checkout options like Stripe Checkout and Payment Links
- Handles cards, wallets, subscriptions, refunds, webhooks
- Fast setup for test mode and live mode
- Good developer experience compared with many alternatives
Good alternatives depending on your needs
- PayPal: easiest if your users already prefer PayPal, but developer experience can be a bit clunkier than Stripe
- Square: good for in-person + online payments, especially if you also have POS needs
- Braintree: solid, but generally more complex than Stripe
Quick recommendation
- If you want fastest integration for online payments: Stripe Checkout
- If you want users to pay with PayPal balance/accounts: PayPal
- If you need simple subscriptions: Stripe
If you tell me your stack (e.g. React, Node, Python, mobile app) and whether it’s one-time payments or subscriptions, I can recommend the simplest option and outline the setup steps.