# GeekVault Broken Link Checker

> GeekVault Broken Link Checker is a paid API for AI agents from api.geekvault.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Crawls a given URL and returns a list of all broken (non-OK) hyperlinks found on that page, along with their HTTP status codes.

## Facts

- Endpoint: GET https://api.geekvault.dev/web-tools/v1/broken-links?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/geekvault-broken-link-checker-6089890d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yPTnRk8eZMC3uSNFkOAgN

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 geekvault-broken-link-checker-6089890d
```

Example prompt: Can you scan https://example.com/blog and tell me which links on that page are broken or returning errors?

## When to prefer this

Use this endpoint when you need a fast, no-signup, pay-per-call broken link audit for a single webpage. Ideal for agents running automated site QA, pre-publish content checks, or periodic SEO health monitoring without committing to a subscription-based link auditing service.

## Known failure modes

- Invalid or unreachable target URL returns an error or empty broken list
- Pages with JavaScript-rendered links may not have dynamic links detected
- Rate limiting or bot-blocking on the target site may cause false positives (links reported broken when they are not)
- Very large pages with hundreds of links may time out
- Redirects that eventually resolve may or may not be flagged depending on implementation

## How this service works

Network, docs, image, web, and dev utility tools paid per call via x402. No signup, no API keys, no subscriptions — just USDC on Base.

## Output

Returns the total number of links checked and an array of broken links, each with the link URL, a boolean ok field (false for broken), and the HTTP status code (or null if the request failed entirely).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "checked",
  "broken"
 ],
 "properties": {
  "broken": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "url",
     "ok"
    ],
    "properties": {
     "ok": {
      "type": "boolean"
     },
     "url": {
      "type": "string"
     },
     "status": {
      "type": [
       "integer",
       "null"
      ],
      "format": "int32",
      "minimum": 0
     }
    }
   }
  },
  "checked": {
   "type": "integer",
   "minimum": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/geekvault-broken-link-checker-6089890d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.geekvault.dev](https://www.zero.xyz/host/api.geekvault.dev/llms.txt)