# Signal Forge Studio - Email Preflight Checker

> Signal Forge Studio - Email Preflight Checker is a paid API for AI agents from signalforgestudios.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-18).

Analyzes an email's HTML or template for link counts, image counts, and potential rendering/deliverability issues before sending

## Facts

- Endpoint: POST https://signalforgestudios.com/x402/email-preflight?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signal-forge-studio-email-preflight-checker-addfc68c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nMXxNTtM7qBQaMYXyQDBm

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-email-preflight-checker-addfc68c -d '<json body>'
```

Example prompt: Can you run a preflight check on this email HTML I'm about to send — I want to know how many links and images it has, and whether there are any rendering or template issues I should fix first?

## When to prefer this

Use this endpoint when you need a fast, cheap static preflight check on an email template or HTML before sending — especially for catching structural issues like link counts, image counts, and template rendering flags. Prefer this over full deliverability platforms when you only need lightweight pre-send validation without inbox simulation or spam scoring.

## Known failure modes

- Malformed or missing email HTML body returns an error
- Template-based emails with platform-specific rendering tags flagged as 'review' severity rather than pass/fail
- No actual inbox rendering simulation — only static analysis
- Link reachability checks may be limited or empty depending on input

## How this service works

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

## Output

Returns a JSON object with counts of links and images found in the email, a list of findings (each with a code and severity level such as 'review'), an overall assessment verdict, a list of known limitations (e.g. no inbox rendering or deliverability testing), and a link_checks array. The success flag confirms the check completed.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "counts": {
    "links": 2,
    "images": 0
   },
   "findings": [
    {
     "code": "template_requires_platform_rendering",
     "severity": "review"
    }
   ],
   "assessment": "review",
   "limitations": [
    "No inbox rendering or deliverability testing."
   ],
   "link_checks": []
  },
  "meta": {
   "example_only": true
  },
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signal-forge-studio-email-preflight-checker-addfc68c/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)