# TD Agent Utility – URL Probe (HTTP Reachability Check)

> TD Agent Utility – URL Probe (HTTP Reachability Check) is a paid API for AI agents from td-agent-utility.abrdns.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-23).

Performs an independent HTTP probe of a given URL and returns pass/fail reachability status, final resolved URL, and timestamp

## Facts

- Endpoint: POST https://td-agent-utility.abrdns.com/v1/probe-url?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/td-agent-utility-url-probe-http-reachability-check-426652dc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZlxDrhyWIPDgAIfNDrYRY

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-reachability-check-426652dc -d '<json body>'
```

Example prompt: Can you do an independent external probe of https://myapp.example.com and tell me whether it's publicly reachable and what the final resolved URL is after any redirects?

## When to prefer this

Choose this endpoint when you need an independent, third-party HTTP reachability check of a public URL — especially to confirm deployments are live, verify redirect chains, or validate that a URL is externally accessible from outside your own network. It returns a clean PASS/FAIL result with the final resolved URL, making it ideal for automated deployment pipelines or pre-send link validation.

## Known failure modes

- URL is unreachable or returns an error status — result_status will be FAIL
- Invalid or malformed URL input causes request rejection
- Timeout if the target server takes too long to respond
- DNS resolution failure for the target domain
- Payment not completed via x402 V2 USDC results in no probe being executed

## How this service works

Independent public URL, HTTP, DNS, TLS, browser screenshot and deployment verification for AI agents. Pay per completed job with x402 V2 USDC on Base.

## Output

A JSON object containing: result_status (PASS or FAIL indicating HTTP reachability), final_url (the fully resolved URL after any redirects), requested_url (the original URL submitted), and checked_at (ISO 8601 timestamp of when the check was performed).

## 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-reachability-check-426652dc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from td-agent-utility.abrdns.com](https://www.zero.xyz/host/td-agent-utility.abrdns.com/llms.txt)