# tariffmonkee.com URL Safety Checker (linkcheck)

> tariffmonkee.com URL Safety Checker (linkcheck) is a paid API for AI agents from tariffmonkee.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Checks a URL's redirect chain, detects homograph/punycode hostname tricks, and cross-references the destination against URLhaus threat intelligence to return a safety verdict.

## Facts

- Endpoint: GET https://tariffmonkee.com/paid/linkcheck
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tariffmonkee-com-url-safety-checker-linkcheck-c280d361
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pmtyHj5QMGsEfiZe1cXn-

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 tariffmonkee-com-url-safety-checker-linkcheck-c280d361
```

Example prompt: Before you fetch anything from https://paypa1.com/invoice/abc123, check if that URL is safe — scan its redirect chain and see if the destination host shows up in any threat feeds.

## When to prefer this

Choose this endpoint when you need a fast, single-URL safety verdict before fetching, sharing, or acting on a link — especially when homograph/punycode domain spoofing or redirect-chain obfuscation are concerns, and you want URLhaus threat feed cross-referencing. Use /sitegrade for a full domain security configuration grade, and /domain-intel for WHOIS/registration facts. Use the /bundle endpoint if you want all three checks at once.

## Known failure modes

- Invalid or malformed URL returns an error
- URL is unreachable or times out during redirect chain analysis
- URLhaus feed lookup may have temporary availability issues
- Highly obfuscated URLs may partially evade redirect chain resolution
- Payment not settled causes 402 response before check is performed

## How this service works

URL -> safety verdict. Checks the redirect chain, detects homograph/punycode hostname tricks, and cross-references the destination host against the URLhaus threat feed. Use to vet a single URL before fetching, sharing, or acting on it. For a full domain configuration grade use /sitegrade; for ownership/registration facts use /domain-intel.

## Output

A safety verdict for the submitted URL, including the full redirect chain analysis, detection of homograph or punycode hostname obfuscation techniques, and a cross-reference result against the URLhaus malicious URL threat feed indicating whether the destination host is flagged.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "GET"
     ]
    }
   },
   "required": [
    "type",
    "method"
   ],
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tariffmonkee-com-url-safety-checker-linkcheck-c280d361/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tariffmonkee.com](https://www.zero.xyz/host/tariffmonkee.com/llms.txt)