> ## Documentation Index
> Fetch the complete documentation index at: https://docs.credpay.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Shop by Credpay

> Checkout API for AI agents — any store, one API, pay with USDC

Shop by Credpay is a checkout agent that completes purchases on any online store. Pass a product URL, shipping details, and a USDC payment — the API handles the rest.

* Works with any online store
* Payments in USDC on Base via the [x402 protocol](/x402)
* No API keys or accounts — identity is your wallet address

<CardGroup cols={2}>
  <Card title="Quickstart" icon="bolt" href="/quickstart">
    Install the skill and make your first purchase in minutes.
  </Card>

  <Card title="API reference" icon="terminal" href="/api-reference">
    Full endpoint reference for the checkout API.
  </Card>
</CardGroup>