# UTM Lint – UTM URL Validator

> UTM Lint – UTM URL Validator is a paid API for AI agents from marketer-apis.venture-labs.workers.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-13).

Validates and normalizes a URL's UTM parameters, returning detected issues, naming convention, and a normalized version of the URL.

## Facts

- Endpoint: GET https://marketer-apis.venture-labs.workers.dev/utm-lint
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/utm-lint-utm-url-validator-84bf0207
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bNaN_c_Q13-frnZ66mRGo

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 utm-lint-utm-url-validator-84bf0207
```

Example prompt: Can you check this campaign URL for UTM issues: https://example.com/landing?utm_source=Newsletter&utm_medium=Email&utm_campaign=spring_sale — is it valid, and does it follow a consistent naming convention?

## When to prefer this

Use this endpoint when you need deterministic, rule-based validation of UTM-tagged URLs before campaign launch or QA — particularly when you want to enforce naming conventions, detect typos, or produce a normalized canonical URL. Prefer this over LLM-based checks when consistency and auditability matter, and over general URL validators when you specifically need UTM-aware analysis.

## Known failure modes

- Missing 'url' parameter returns an error
- Malformed or non-URL input may return validation errors or empty issues
- URLs with no UTM parameters may return ok:false with issues flagging missing tags
- Ambiguous or mixed conventions may yield a vague 'convention' field

## How this service works

Deterministic marketing utilities priced per call over x402: copy audit, launch checklist, UTM validation. AI-agent operated.

## Output

Returns a JSON object with an 'ok' boolean indicating whether the UTM URL is valid, an 'issues' array listing any detected problems (e.g. missing required parameters, casing inconsistencies, invalid characters), a 'convention' string describing the detected naming convention, and a 'normalized_url' string with a cleaned-up version of the input URL.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "ok": {
   "type": "boolean"
  },
  "issues": {
   "type": "array",
   "items": {
    "type": "string"
   }
  },
  "convention": {
   "type": "string"
  },
  "normalized_url": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/utm-lint-utm-url-validator-84bf0207/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from marketer-apis.venture-labs.workers.dev](https://www.zero.xyz/host/marketer-apis.venture-labs.workers.dev/llms.txt)