# TD Agent Utility · x402 Ping (HTTP/DNS/TLS/Screenshot Verification)

> TD Agent Utility · x402 Ping (HTTP/DNS/TLS/Screenshot Verification) is a paid API for AI agents from tdagentutility.co.uk, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-16).

Performs a live HTTP connectivity ping and deployment health check on a website, returning a deterministic PASS/REVIEW/ISSUE result with x402 V2 metadata.

## Facts

- Endpoint: GET https://tdagentutility.co.uk/v1/x402-ping?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/td-agent-utility-x402-ping-http-dns-tls-screenshot-verification-ea3d968c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uj6QhR2tJ_CkdKJUNPVBV

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 td-agent-utility-x402-ping-http-dns-tls-screenshot-verification-ea3d968c
```

Example prompt: Can you do an independent HTTP ping check on my deployed site and tell me whether it's passing, needs review, or has an issue — I need an outside observer to confirm it's actually live?

## When to prefer this

Use this endpoint when you need a fast, cheap ($0.001 USDC), deterministic, independently-sourced HTTP health check with a clear PASS/REVIEW/ISSUE verdict — especially when you want third-party evidence rather than self-reported uptime. Prefer it over generic monitoring services when you need x402-compatible payment and verifiable agent-friendly output. It is not a full synthetic monitoring solution but is ideal for lightweight deployment verification before announcements or automated agent self-checks.

## Known failure modes

- Target site unreachable — result_status returns ISSUE with warnings describing the failure
- DNS resolution failure — warnings array populated with DNS error details
- TLS certificate problem — flagged in warnings, result_status set to REVIEW or ISSUE
- Payment failure via x402 — request rejected before execution
- Malformed input body — 400-level error if required fields missing or type/method/bodyType values invalid
- Timeout on remote probe — may return ISSUE with timeout warning

## How this service works

Independent website and deployment verification for AI agents: HTTP, DNS, TLS and Chromium screenshot evidence. Three deterministic tools, x402 V2 Base USDC.

## Output

A JSON object containing: a boolean 'ok' field, a 'result_status' of PASS, REVIEW, or ISSUE, the tool name ('x402_ping'), the network identifier, x402 protocol version, a 'checked_at' ISO timestamp, any 'warnings' as an array of strings, and the service name. This gives a deterministic, independently-sourced snapshot of whether the target HTTP endpoint was reachable at the time of the call.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "title": "PingInput",
     "properties": {},
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "tool",
      "checked_at",
      "result_status",
      "warnings",
      "ok",
      "service",
      "timestamp",
      "x402_version",
      "network"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "tool": {
       "type": "string"
      },
      "job_id": {
       "type": "string"
      },
      "network": {
       "type": "string"
      },
      "service": {
       "type": "string"
      },
      "warnings": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "timestamp": {
       "type": "string"
      },
      "checked_at": {
       "type": "string",
       "format": "date-time"
      },
      "x402_version": {
       "type": "integer"
      },
      "result_status": {
       "enum": [
        "PASS",
        "REVIEW",
        "ISSUE"
       ]
      }
     },
     "description": "Declared result structure. The accompanying example is synthetic documentation, not execution or settlement evidence.",
     "additionalProperties": false
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "tool": "x402_ping",
  "network": "eip155:84532",
  "service": "TD Agent Utility",
  "warnings": [],
  "timestamp": "2026-10-15T00:00:00Z",
  "checked_at": "2026-10-15T00:00:00Z",
  "x402_version": 2,
  "result_status": "PASS"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/td-agent-utility-x402-ping-http-dns-tls-screenshot-verification-ea3d968c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tdagentutility.co.uk](https://www.zero.xyz/host/tdagentutility.co.uk/llms.txt)