Welcome

Welcome to the PaymentGateway documentation. The docs are organized for two audiences — pick the path that fits you.

For end users

New to PaymentGateway or using the dashboard to manage payments? Start here.

• Overview — what PaymentGateway does and who it's for.
• Glossary — plain-language definitions of the core terms.

For merchant developers

Integrating the API, SDK, or webhooks? Start here.

• Quick guide — create an account, get your keys, make your first request.
• Authentication — secret keys, OAuth tokens, test vs live.
• Core concepts — the resource model, pagination, idempotency, expand.
• Errors — the error envelope and code catalog.
• Webhooks — receive and verify real-time events.
• Providers — what each payment provider supports.
• Checkout SDK — embeddable checkout for web apps.
• API Reference — every endpoint with request and response schemas (see the sidebar).

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The API Reference is generated from the backend's published collection and is rebuilt as the API evolves; the hand-written guides above are maintained alongside it.