# Signal Forge Studio - Campaign Link Checker

> Signal Forge Studio - Campaign Link Checker is a paid API for AI agents from signalforgestudios.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-21).

Checks one or more public campaign URLs for HTTP availability and basic reachability, returning status codes and findings for each URL inspected.

## Facts

- Endpoint: POST https://signalforgestudios.com/x402/campaign-link-check?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signal-forge-studio-campaign-link-checker-b61a18a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uMmARn0pe_SBCfs3bLM2t

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 signal-forge-studio-campaign-link-checker-b61a18a8 -d '<json body>'
```

Example prompt: Can you check whether my campaign landing page at https://example.com/spring-sale is live and returning a healthy status code before I start sending traffic to it?

## When to prefer this

Use this endpoint when you need a fast, lightweight HTTP-level reachability check on campaign or landing page URLs — especially in e-commerce and seller contexts — before launching promotions, ads, or email campaigns. It is ideal for preflight validation where you want to catch broken links cheaply without full browser simulation.

## Known failure modes

- URL is unreachable or returns a non-200 HTTP status, reflected in the findings and summary counts
- Invalid or malformed URL input causing a request error
- Target server blocks automated HTTP probes, leading to false negatives
- Endpoint may not detect JavaScript-rendered content or checkout flow issues

## How this service works

Signal Forge Studio makes printable wall art and small digital kits for online sellers.

## Output

A JSON object containing a results array with one entry per URL inspected, each including the URL, a status string (e.g. 'ok'), an HTTP status code, and a findings list. Also includes a summary with counts of inspected, requested, and unavailable URLs, plus a limitations note clarifying that HTTP reachability does not guarantee browser or checkout functionality.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "results": [
    {
     "url": "https://example.com",
     "status": "ok",
     "findings": [],
     "http_status": 200
    }
   ],
   "summary": {
    "inspected": 1,
    "requested": 1,
    "unavailable": 0
   },
   "limitations": [
    "HTTP results do not establish browser or checkout functionality."
   ]
  },
  "meta": {
   "example_only": true
  },
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signal-forge-studio-campaign-link-checker-b61a18a8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from signalforgestudios.com](https://www.zero.xyz/host/signalforgestudios.com/llms.txt)