# Sila Pay > Sila Pay payment gateway developer documentation: Pix (cash-in/cash-out), Credit Card, Billet, Balance, Cryptocurrencies, Webhooks and Sub-accounts. ## API Base URL https://api.silapay.pro ## Authentication All API requests require two headers: `api-key` and `secret-key`. Keys are generated in the Sila Pay portal (https://app.silapay.pro). Content type is `application/json`. ## OpenAPI spec - OpenAPI 3.0: https://docs.silapay.pro/openapi.json ## Documentation - [Get Started](https://docs.silapay.pro/llms/get-started.md) - [HMAC Authentication](https://docs.silapay.pro/llms/hmac.md) - [Webhook](https://docs.silapay.pro/llms/webhook.md) - [Error Codes](https://docs.silapay.pro/llms/error-codes.md) - [Pix Cash In](https://docs.silapay.pro/llms/pix/cash-in.md) - [Pix Cash Out](https://docs.silapay.pro/llms/pix/cash-out.md) - [Credit Card](https://docs.silapay.pro/llms/credit-card.md) - [Billet](https://docs.silapay.pro/llms/billet.md) - [Balance](https://docs.silapay.pro/llms/balance.md) - [Cryptocurrency Cash In](https://docs.silapay.pro/llms/criptocurrency/cash-in.md) - [Cryptocurrency Cash Out](https://docs.silapay.pro/llms/criptocurrency/cash-out.md) - [Subsellers Overview](https://docs.silapay.pro/llms/subcontas/overview.md) - [Subseller Onboarding](https://docs.silapay.pro/llms/subcontas/subseller-onboarding.md) - [Transaction with Split](https://docs.silapay.pro/llms/subcontas/transaction-split.md) - [List Banks](https://docs.silapay.pro/llms/subcontas/banks.md) - [Subseller Status](https://docs.silapay.pro/llms/subcontas/status.md) - [List Subsellers](https://docs.silapay.pro/llms/subcontas/list.md) - [Issue Subseller API Keys](https://docs.silapay.pro/llms/subcontas/api-keys-issue.md) - [List and Revoke Subseller API Keys](https://docs.silapay.pro/llms/subcontas/api-keys-list-revoke.md) - [Partner Webhook](https://docs.silapay.pro/llms/subcontas/partner-webhook.md) - [Subseller Sandbox](https://docs.silapay.pro/llms/subcontas/sandbox.md) - [Subseller Reference](https://docs.silapay.pro/llms/subcontas/reference.md) ## Full text - [llms-full.txt](https://docs.silapay.pro/llms-full.txt)