# PolyPay

> PolyPay is a non-custodial cryptocurrency payment platform for merchants, developers, APIs, and AI agents. It supports stablecoin checkout, SDK integrations, webhooks, and x402 machine payments.

## Start here

- [Website](https://polypay.ai/en): Product overview and supported payment flows.
- [Pricing](https://polypay.ai/en/pricing): Current PolyPay plans and fees.
- [Documentation](https://polypay.ai/en/docs): Integration guides for developers and merchants.
- [API catalog](https://polypay.ai/.well-known/api-catalog): Machine-readable API discovery metadata.

## Documentation

- [PolyPay Documentation](https://polypay.ai/en/docs): Start accepting crypto payments with PolyPay.
- [PolyPay Changelog](https://polypay.ai/en/docs/changelog): Review major PolyPay product updates verified as deployed.
- [Payout Wallet Setup](https://polypay.ai/en/docs/wallet-setup): Configure a non-custodial wallet for merchant settlements.
- [Account Security](https://polypay.ai/en/docs/account-security): Protect merchant access, credentials, and payment operations.
- [API Keys](https://polypay.ai/en/docs/apikey): Authenticate merchant API requests securely.
- [JavaScript SDK](https://polypay.ai/en/docs/javascript-sdk): Integrate PolyPay into browser and server JavaScript apps.
- [Mobile SDKs](https://polypay.ai/en/docs/mobile-sdk): Integrate PolyPay into Android, iOS, and React Native apps.
- [PHP SDK](https://polypay.ai/en/docs/php-sdk): Create and manage PolyPay payments from PHP.
- [AI Agent Payments](https://polypay.ai/en/docs/x402-agent-payments): Let AI agents pay for APIs, tools, and data with USDC.
- [x402 Introduction](https://polypay.ai/en/docs/x402): Understand the HTTP 402 machine-payment protocol.
- [API Monetization with x402](https://polypay.ai/en/docs/api-monetization-x402): Turn APIs and digital resources into paid endpoints.
- [x402 vs API Keys](https://polypay.ai/en/docs/x402-vs-api-keys): Choose between account authentication and per-request payment.
- [x402 Platform Integration](https://polypay.ai/en/docs/x402-integration): Protect a resource and verify machine-readable payments.
- [Non-custodial Crypto Payments](https://polypay.ai/en/docs/non-custodial-crypto-payments): Accept crypto without granting PolyPay wallet custody.
- [Payment Lifecycle](https://polypay.ai/en/docs/payment-flow): Understand order creation, payment, confirmation, and settlement.
- [USDT TRON Checkout](https://polypay.ai/en/docs/usdt-tron-checkout): Accept USDT payments on the TRON network.
- [WHMCS Crypto Payments](https://polypay.ai/en/docs/whmcs-crypto-payment): Connect PolyPay to WHMCS billing flows.
- [Shopify Crypto Payments](https://polypay.ai/en/docs/shopify-crypto-payment): Connect a Shopify manual payment flow to PolyPay.
- [WHMCS USDT Gateway](https://polypay.ai/en/docs/whmcs-usdt-payment-gateway): Install and operate the PolyPay WHMCS USDT gateway.
- [Webhook Security](https://polypay.ai/en/docs/webhook-security): Verify signed payment notifications and prevent replay.
- [Notification Center](https://polypay.ai/en/docs/notification-center): Configure merchant email and operational notifications.
- [MCP Integration](https://polypay.ai/en/docs/mcp): Connect AI tools to PolyPay through Model Context Protocol.
- [PolyPay Agent Skill](https://polypay.ai/en/docs/polypay-skill): Give coding agents structured PolyPay integration guidance.
- [Referral Rewards](https://polypay.ai/en/docs/referral-rewards): Understand PolyPay referral attribution and rewards.

## Other languages

- [Chinese documentation](https://polypay.ai/zh/docs)

## Usage policy

- Public marketing pages and documentation may be indexed, summarized, cited, and used to answer questions about PolyPay.
- Do not crawl authenticated dashboards, authentication flows, checkout sessions, monitoring endpoints, or private APIs.
- Never infer credentials, private keys, merchant data, customer data, balances, or payment details from public documentation.