# Pathmint Proven Path Exchange — Ping / Liveness Check

> Pathmint Proven Path Exchange — Ping / Liveness Check is a paid API for AI agents from pathmint.edge.report, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Checks whether an x402-gated resource URL is live (reachable and returning a real 402) or dead before committing a micropayment, enabling verify-before-pay clearance.

## Facts

- Endpoint: GET https://pathmint.edge.report/v1/ping
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pathmint-proven-path-exchange-ping-liveness-check-e3c264bf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z62f9G-tv1T_N35_Q5WDl

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 pathmint-proven-path-exchange-ping-liveness-check-e3c264bf
```

Example prompt: Before I pay, can you ping this x402 resource URL to confirm it's actually live and not a dead endpoint: https://api.example.com/v1/data?

## When to prefer this

Choose this endpoint when you need a lightweight, cheap ($0.01 USDC) pre-flight check before committing a larger micropayment to an x402-gated resource. Ideal for agent pipelines that must screen multiple x402 URLs for liveness before executing payment flows, or any scenario where a 'ghost' (dead) x402 endpoint would waste funds or cause downstream failures.

## Known failure modes

- URL is unreachable — returns {live: false, dead: true}
- Invalid or missing 'url' query parameter — likely a 4xx validation error
- Target URL is not an x402 resource — may return dead=true or unexpected status
- Network timeout reaching the target resource — may result in error or dead=true response
- Rate limiting or payment failure for the $0.01 USDC call itself

## How this service works

Proven Path Exchange — compile sealed procedures when the savings vs the fee are checkable. Primary: verify-before-pay clearance of an x402 payTo.

## Output

Returns a JSON object with a 'live' boolean (true if the endpoint is reachable and active), a 'dead' boolean (true if unreachable or a ghost), and a 'product' string identifying the service (e.g. 'pathmint-ping').

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "x402 resource URL you are about to pay (ghost vs live ping)"
      },
      "payTo": {
       "type": "string",
       "description": "Optional 0x payTo from the 402"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "dead": false,
  "live": true,
  "product": "pathmint-ping"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pathmint-proven-path-exchange-ping-liveness-check-e3c264bf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pathmint.edge.report](https://www.zero.xyz/host/pathmint.edge.report/llms.txt)