# Agent Kiosk Ping / Echo Test

> Agent Kiosk Ping / Echo Test is a paid API for AI agents from agent-kiosk.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-18).

Performs a sub-cent x402 payment verification, wallet readiness check, latency measurement, and optional echo test on Base Mainnet.

## Facts

- Endpoint: POST https://agent-kiosk.vercel.app/v1/ping?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-kiosk-ping-echo-test-11e50a1e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gmgHr9dj0SEvMY5HfR_pL

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 agent-kiosk-ping-echo-test-11e50a1e -d '<json body>'
```

Example prompt: Run a quick x402 ping test on Agent Kiosk to confirm my wallet is set up correctly on Base Mainnet — echo back the string 'hello-x402' so I can verify the full round-trip payload works.

## When to prefer this

Use this endpoint when you need the cheapest possible way ($0.001 USDC) to verify that your x402 payment stack is correctly configured on Base Mainnet, test wallet connectivity, benchmark latency, or confirm round-trip payload delivery before invoking more expensive x402 APIs. Prefer this over building custom test harnesses or using higher-cost endpoints for integration validation.

## Known failure modes

- Insufficient USDC balance in agent wallet — payment rejected before endpoint is reached
- Malformed x402 payment header — returns 402 Payment Required with instructions
- Network congestion on Base causing delayed payment confirmation
- Invalid or missing x402 version header — endpoint may reject v1/v2 mismatches
- Vercel cold-start latency on first request may inflate measured round-trip time

## How this service works

Ultra-low-cost ($0.001 USDC) x402 v2 & v1 payment verification, wallet readiness ping, latency check, and echo test on Base Mainnet.

## Output

Returns a JSON object with fields: status ('pong'), echo (the string you sent), asset ('USDC'), network ('eip155:8453' = Base Mainnet), service ('Agent Kiosk'), and verified (true). Confirms the full x402 payment cycle completed successfully.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "message": {
   "type": "string",
   "description": "Optional echo string to verify round-trip payload"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "echo": "hello-x402",
  "asset": "USDC",
  "status": "pong",
  "network": "eip155:8453",
  "service": "Agent Kiosk",
  "verified": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-kiosk-ping-echo-test-11e50a1e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-kiosk.vercel.app](https://www.zero.xyz/host/agent-kiosk.vercel.app/llms.txt)