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

# Make payments using Atum and x402

> Pay for x402-gated HTTP resources from your agent.

Use this guide when your agent needs to pay for an x402-gated API, tool call, or other HTTP resource.

1. Your agent requests the resource and receives `402 Payment Required`.
2. It signs a payment authorization and retries automatically.
3. Once payment settles, it receives the resource and a receipt.

## Choose an integration path

<CardGroup cols={2}>
  <Card title="Agentic sends" icon="robot" href="/payment-protocols/x402/make-payments/agentic-payment-initiation">
    Run a working reference client locally, no code changes needed.
  </Card>

  <Card title="Develop with Atum SDK" icon="code" href="/payment-protocols/x402/make-payments/develop-with-the-sdk">
    Wire payment into your own agent's HTTP layer.
  </Card>
</CardGroup>

For the resource-server side, see [Accept payments](/payment-protocols/x402/accept-payments/overview). For the verify, settle, and supported-method endpoints, see the [x402 Facilitator API reference](/api-reference/x402/introduction).