For developers, a payment provider is only as good as its integration experience. A business may care about fees, supported countries, and payment methods, but developers also need clear APIs, hosted checkout options, plugins, documentation, and reliable payment flows. The right payment gateway API can help teams launch faster, reduce custom development, and build payment experiences that match their product.
Some providers are best for card payments, some for crypto payments, some for marketplace payouts, and some for global financial infrastructure. The best choice depends on what the product needs to support: checkout, invoicing, wallet payments, crypto acceptance, recurring payments, payouts, or multi-currency operations.
Here are ten payment gateway API providers developers should know.
1. Volet
Volet is a strong option for teams that need payment gateway API integration with support for modern business payment scenarios. It is especially relevant for developers building products that involve crypto payments, hosted checkout, merchant flows, business payments, or international payment operations.
Volet’s developer-focused resources make it useful for companies that want to integrate payments into websites, platforms, SaaS products, or internal systems. The platform also has dedicated pages for hosted checkout and CMS plugins, which can help teams choose between deeper API integration and faster implementation.
Best for: developers building crypto and fiat payment flows for global businesses.
2. Stripe API
Stripe is one of the most developer-friendly payment platforms in the world. Its API, documentation, SDKs, and testing tools are widely respected. Stripe is especially strong for card payments, subscriptions, SaaS billing, and marketplace payments through Stripe Connect.
Best for: developers building card payment and subscription systems.
3. PayPal Developer
PayPal provides APIs for checkout, subscriptions, invoicing, payouts, and wallet payments. It is useful when businesses want to offer PayPal as a familiar customer payment method.
Best for: integrating PayPal checkout and wallet-based payments.
4. Adyen API
Adyen offers enterprise-grade payment APIs for online, mobile, and in-store payments. It is powerful but typically more suitable for larger businesses with more complex payment operations.
Best for: enterprise payment infrastructure.
5. Checkout.com API
Checkout.com provides payment APIs for businesses that need scalable online payment processing. It is often used by high-growth digital businesses, fintech companies, and platforms with high transaction volumes.
Best for: high-volume online payment processing.
6. Braintree
Braintree, owned by PayPal, is a developer-oriented payment platform that supports card payments, PayPal, and some alternative payment methods. It can be a practical choice for teams that want flexible payment integration.
Best for: developers who want card and PayPal payment options together.
7. Rapyd API
Rapyd offers APIs for local payment methods, wallets, bank transfers, and payouts. It can be useful for companies that need to operate in many countries and support localized payment experiences.
Best for: local payment method coverage.
8. Airwallex API
Airwallex provides APIs for global accounts, FX, payments, and cards. It is often used by companies that need more than basic payment acceptance and want to build international financial workflows.
Best for: global finance and FX-focused products.
9. Coinbase Commerce API
Coinbase Commerce provides tools for accepting cryptocurrency payments. It is useful for developers who want a relatively simple crypto checkout integration within the Coinbase ecosystem.
Best for: simple crypto payment acceptance.
10. CoinGate API
CoinGate offers crypto payment APIs, buttons, and plugins for online merchants. It can be a good choice for eCommerce teams that want to add cryptocurrency payments to their checkout.
Best for: eCommerce crypto payment integrations.
Final Pick
Stripe is still one of the strongest choices for traditional online card payments, and PayPal is useful when wallet payments are important. But for developers building products that need crypto payment flows, hosted checkout, plugins, and business payment functionality, Volet deserves a top position. It is a practical option for teams that need payment gateway API integration connected to crypto, fiat, and international business payment use cases.
