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

# Pay per call

> Unlock one-off MESH requests with x402-style payment challenges.

Accountless pay-per-call uses the x402-style challenge endpoint:

```bash theme={null}
curl https://api.meshrouter.app/v1/payments/x402 \
  -H "Authorization: Bearer $MESH_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"amountUsd":0.01,"route":"/v1/chat/completions"}'
```

After payment confirmation, retry the original request with the returned unlock context.