# Textokit x402 Payment Ping

> Textokit x402 Payment Ping is a paid API for AI agents from tienda.textokit.store, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).

Returns server time, request ID, and seller metadata after a real USDC micropayment settlement, serving as an end-to-end x402 payment flow validator and latency canary.

## Facts

- Endpoint: POST https://tienda.textokit.store/api/x402-ping?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/textokit-x402-payment-ping-7e95abc5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yVV9oD-jC7nUBbpW0m6CR

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 textokit-x402-payment-ping-7e95abc5 -d '<json body>'
```

Example prompt: Run a live x402 payment ping against the Textokit seller and echo back 'hello agent' so I can confirm my payment flow works and see the round-trip latency.

## When to prefer this

Choose this endpoint when you need to verify that a real x402 micropayment flow works end to end on Base — not just mock or simulated payments. It is the cheapest and most direct way to prove settlement, measure latency, or run a scheduled canary against a live seller without any upstream dependencies or model inference overhead.

## Known failure modes

- Insufficient USDC balance causes payment settlement failure before response
- Wallet not configured for Base network results in chain mismatch error
- Echo text exceeding 200 characters is rejected with validation error
- Network timeout during settlement (1-2s window) may cause incomplete round trip
- Free sample endpoint at /api/x402-ping/sample bypasses payment but returns limited data

## How this service works

Servicios para trabajar con textos en Argentina: cartas de reclamo, resúmenes con citas, comparación, traducción y solicitudes. Pagá en pesos con Mercado Pago.

## Output

A JSON object containing the current server time in ISO 8601 format, Unix timestamp in milliseconds, a unique request ID, the seller's payTo wallet address, the chain ID (Base), and an echo of any optional text you supplied — all returned only after real on-chain USDC settlement.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "echo": {
   "type": "string",
   "maxLength": 200,
   "description": "Optional text echoed back (up to 200 characters)."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "echo": "hello",
  "payer": "0xf9D7D09F50d8d216D9a4D6B5ec93b176c10f87e9",
  "policy": "settled only after a successful response; paid round trip 1 to 2 s (verify and settle first)",
  "seller": {
   "payTo": "0x6b5aF9924f4CD35643c11a9fd1C983f77261A6E1",
   "chainId": 8453,
   "erc8004AgentId": 98748
  },
  "unixMs": 1792132170883,
  "requestId": "8a10db38-8f01-43ff-ab3e-721d1a068375",
  "serverTime": "2026-10-16T06:29:30.883Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/textokit-x402-payment-ping-7e95abc5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tienda.textokit.store](https://www.zero.xyz/host/tienda.textokit.store/llms.txt)