# Saylor Innovations x402 Ping Health Check

> Saylor Innovations x402 Ping Health Check is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Performs a paid x402 round-trip health check that returns server time and a unique request ID, confirming the payment pipeline and server are operational.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/x402/ping?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-x402-ping-health-check-d52d72d1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aSEA95sEMzXWIUTfDMPBH

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 saylor-innovations-x402-ping-health-check-d52d72d1
```

Example prompt: Can you ping the Saylor Innovations x402 health check endpoint and tell me if the server is up and what time it returns?

## When to prefer this

Choose this endpoint when you need to verify that an x402 micropayment pipeline is fully operational end-to-end, including payment processing and server response. It is ideal for integration testing, uptime monitoring of x402-enabled services, or validating that a $0.01 USDC payment flows correctly before calling more expensive endpoints.

## Known failure modes

- Payment failure — x402 payment not accepted or insufficient USDC balance returns a 402 error
- Server unavailable — endpoint unreachable returns a network or 5xx error
- Invalid HTTP method — non-GET requests may be rejected
- Rate limiting — too many rapid pings may result in throttling

## How this service works

x402 ping health check - a paid round trip that returns server time and a request id

## Output

Returns a JSON object with: ok (boolean success flag), pong (boolean confirming ping response), server_time (ISO 8601 UTC timestamp), unix_ms (Unix time in milliseconds), request_id (unique UUID for the request), and service (service name string).

## 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"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "ok",
      "pong",
      "server_time"
     ],
     "properties": {
      "ok": {
       "type": "boolean",
       "description": "True when the check succeeded"
      },
      "pong": {
       "type": "boolean"
      },
      "service": {
       "type": "string",
       "description": "Service name"
      },
      "unix_ms": {
       "type": "number",
       "description": "Unix, in milliseconds"
      },
      "request_id": {
       "type": "string",
       "description": "Request id identifier"
      },
      "server_time": {
       "type": "string",
       "description": "Server time (UTC unless a time zone is given)"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-x402-ping-health-check-d52d72d1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)