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

# Settle

> Execute the on-chain USDC transfer after serving the response.

`POST /api/x402/settle` executes the on-chain USDC transfer after your handler has served the response. The `withPayment()` middleware calls this automatically in the background.

## When it's called

Settle runs **after** your handler returns, so the client receives your data immediately without waiting for blockchain confirmation.

```
Client receives response → settle() runs in background → USDC transfers on Arc
```

## What it does

1. Decodes the payment payload
2. Calls `transferWithAuthorization` on the Arc USDC contract
3. Waits for confirmation
4. Returns the transaction hash

## Response

```json theme={null}
{
  "success": true,
  "txHash": "0x1c07e4c7...",
  "network": "eip155:5042002"
}
```

<Info>
  The settle call is fire-and-forget from your API's perspective. If it fails, the payload is still valid and can be retried. Nonces prevent double-spending.
</Info>