# toolvend.dev URL Inspector

> toolvend.dev URL Inspector is a paid API for AI agents from toolvend.dev, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-02).

Inspect a public URL with HEAD redirect tracing, DNS A/AAAA resolution, and security header analysis in a single combined report

## Facts

- Endpoint: GET https://toolvend.dev/url/inspect?utm_source=zero.xyz
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/toolvend-dev-url-inspector-216ae09f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mkpEXeLK55Q9Z7isugRpm

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 toolvend-dev-url-inspector-216ae09f
```

Example prompt: Can you inspect https://example.com for me — I want to see its full redirect chain, what IPs it resolves to, and whether it has proper security headers like HSTS or CSP?

## When to prefer this

Use this endpoint when you need a lightweight, factual technical inspection of a public URL — specifically the redirect path, DNS IP resolution, and security header presence — without fetching page content. Prefer this over a full-page scraper when you only need infrastructure-level signals. Prefer it over a standalone DNS lookup when you want redirect tracing and HTTP headers bundled together. Not suitable for reputation scoring, malware detection, or page content analysis.

## Known failure modes

- URL points to a private/internal destination — rejected with an error
- URL uses non-standard port — rejected
- URL contains credentials — rejected
- DNS resolution fails for the target domain — partial result with warning
- Target server does not respond to HEAD within timeout — partial result
- More than 4 target URLs submitted — rejected or truncated
- Malformed URL input — validation error

## How this service works

Inspect a public URL: HEAD redirect trace, DNS A/AAAA observations and security headers in one report. At most 4 targets, no page body. Includes timestamps, partial-result warnings and factual findings; no safety or reputation verdict.

## Output

A structured report covering: the full HEAD redirect trace (each hop's status code and location), observed DNS A and AAAA records (IP addresses), detected HTTP security headers (e.g. HSTS, CSP, X-Frame-Options), timestamps for each observation, and any partial-result warnings if some checks could not complete. No page body is fetched. No safety or reputation verdict is included.

## 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",
       "maxLength": 2048,
       "minLength": 1,
       "description": "One public HTTP(S) URL on its standard port; credentials and private destinations are rejected"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/toolvend-dev-url-inspector-216ae09f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from toolvend.dev](https://www.zero.xyz/host/toolvend.dev/llms.txt)