# TD Agent Utility – URL Probe & HTTP Verification

> TD Agent Utility – URL Probe & HTTP Verification is a paid API for AI agents from tdagentutility.co.uk, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-15).

Performs a deterministic HTTP reachability check on a given URL and returns the final resolved URL, HTTP result status, and timestamp of the check.

## Facts

- Endpoint: POST https://tdagentutility.co.uk/v1/probe-url?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/td-agent-utility-url-probe-http-verification-9e3fbac4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-uopKvR8gaeOiQYsreqQf

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-url-probe-http-verification-9e3fbac4 -d '<json body>'
```

Example prompt: Can you probe https://myapp.example.com and tell me whether it's reachable and what the final resolved URL is?

## When to prefer this

Choose this endpoint when you need a deterministic, independent, third-party HTTP reachability check on a public URL — especially for post-deployment verification, redirect auditing, or broken link detection. It is particularly useful when you want a neutral external probe rather than an in-process HTTP call, and when you need the final resolved URL after redirects alongside a clear PASS/FAIL status.

## Known failure modes

- URL is unreachable or returns a non-2xx status — result_status will be FAIL
- DNS resolution failure for the given hostname
- Invalid or malformed URL input causing request rejection
- Timeout if the target server is extremely slow to respond
- Payment via x402 not completed — job will not execute

## 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

Returns a JSON object with the original requested URL, the final resolved URL after any redirects, an ISO 8601 timestamp of when the check was performed, and a result_status field (e.g. PASS or FAIL) indicating whether the URL was reachable.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "final_url": "https://example.com/",
  "checked_at": "2026-10-14T00:00:00+00:00",
  "requested_url": "https://example.com",
  "result_status": "PASS"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/td-agent-utility-url-probe-http-verification-9e3fbac4/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)