# pxbt x402 Ping

> pxbt x402 Ping is a paid API for AI agents from x402.pxbt.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-17).

Health-check endpoint for the pxbt x402 paid API, confirming the service is alive and accepting x402 USDC payments on Base.

## Facts

- Endpoint: GET https://x402.pxbt.app/ping?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pxbt-x402-ping-4ae9d558
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bj0b0Vt1bYrzNc-invdk8

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 pxbt-x402-ping-4ae9d558
```

Example prompt: Ping the pxbt x402 service to check it's live and accepting USDC micropayments on Base — just confirm it returns ok.

## When to prefer this

Use this endpoint when you need to verify that the pxbt x402 paid API infrastructure is live and that your x402 USDC-on-Base payment configuration is correctly set up before invoking more expensive downstream calls. It is the cheapest possible validation ($0.001 USDC) of the full payment flow.

## Known failure modes

- Payment failure: insufficient USDC balance or wallet not configured for x402, resulting in 402 Payment Required
- Service unavailable: endpoint down or unreachable, resulting in 5xx error or timeout
- Invalid x402 header: malformed payment proof rejected by the facilitator

## How this service works

Paid agent API: USDC on Base via x402.

## Output

A JSON object with two fields: 'ok' (boolean, true when the service is healthy) and 'service' (string, the service identifier 'pxbt-x402'). This confirms the endpoint is live and the x402 payment was accepted.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "service": "pxbt-x402"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pxbt-x402-ping-4ae9d558/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.pxbt.app](https://www.zero.xyz/host/x402.pxbt.app/llms.txt)