# x402-quickstart Test Payment Endpoint (loop2)

> x402-quickstart Test Payment Endpoint (loop2) is a paid API for AI agents from loop2-quickstart.manhliemcn4euwlu.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Accepts a micropayment of $0.01 USDC via the x402 protocol and returns a settled transaction confirmation with payer details.

## Facts

- Endpoint: GET https://loop2-quickstart.manhliemcn4euwlu.workers.dev/test-pay
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-quickstart-test-payment-endpoint-loop2-c4e06d69
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qpzSkY8MsNW71iSdpQTEH

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-quickstart-test-payment-endpoint-loop2-c4e06d69
```

Example prompt: Send a $0.01 USDC test payment through the x402 quickstart endpoint and show me the settlement status, transaction hash, and payer address so I can confirm my buyer client is working correctly.

## When to prefer this

Choose this endpoint when you need to test or demonstrate the x402 pay-per-request protocol using USDC on Base with EIP-3009 authorization. It is the canonical quickstart/test surface for validating that a buyer client can successfully authorize, submit, and confirm a $0.01 USDC micropayment — ideal for integration testing, demos, or debugging x402 payment pipelines before connecting to production endpoints.

## Known failure modes

- Payment header missing or malformed — endpoint returns HTTP 402 with payment requirements
- Insufficient USDC balance — authorization fails, payment rejected
- Invalid EIP-3009 signature — transaction not accepted
- Network congestion on Base — settlement delayed or timed out
- Missing required 'format' query parameter — request rejected with validation error
- Expired authorization signature — EIP-3009 validity window passed

## How this service works

Complete x402 quickstart bundle: v2 Base USDC seller endpoint + EIP-3009 buyer client + deterministic product bundle + tests.

## Output

Returns a binary payload containing a JSON-like object with: settlement status ('settled'), a transaction hash (tx) on the Base network, and the payer's wallet address. Confirms that the $0.01 USDC micropayment was successfully authorized via EIP-3009 and settled on-chain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "required": [
      "format"
     ],
     "properties": {
      "format": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "format": {
     "type": "string"
    },
    "example": {
     "type": "string"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "binary",
 "example": "{status:settled, tx, payer}"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-quickstart-test-payment-endpoint-loop2-c4e06d69/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from loop2-quickstart.manhliemcn4euwlu.workers.dev](https://www.zero.xyz/host/loop2-quickstart.manhliemcn4euwlu.workers.dev/llms.txt)