# GigSoul Email Deliverability Checker

> GigSoul Email Deliverability Checker is a paid API for AI agents from api.gigsoul.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-20).

Analyzes email content and returns a pass/warn/fail verdict, a 0-100 deliverability score, and up to three flagged phrases that may hurt inbox placement.

## Facts

- Endpoint: POST https://api.gigsoul.com/check-email-deliverability?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gigsoul-email-deliverability-checker-846f079e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BGb2nImx25EMu9Bw9MvJU

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 gigsoul-email-deliverability-checker-846f079e -d '<json body>'
```

Example prompt: Can you run a deliverability preflight on this email draft and tell me if it passes, what score it gets out of 100, and which phrases might be getting it flagged as spam? Here's the content: 'Congratulations! You've been selected for an exclusive limited-time offer — act now and claim your FREE prize before it expires!'

## When to prefer this

Choose this endpoint when you need a fast, cheap content-only deliverability signal on email drafts before sending — especially useful in automated workflows where you want to gate sends on a minimum score or catch obvious spam triggers. It is not a substitute for full email testing tools that check sending reputation or actual inbox placement; prefer it for lightweight preflight checks at $0.005 per call.

## Known failure modes

- Empty or missing content/text/context field returns an error or meaningless score
- Very short inputs may not yield meaningful phrase-level flags
- Content in non-English languages may produce inaccurate scoring
- No placement guarantee — passing content can still be filtered by recipient mail servers
- Score reflects only content signals, not sending reputation, domain health, or authentication (SPF/DKIM/DMARC)

## How this service works

Fast, cheap spam-risk gate for one email: pass/warn/fail, a 0-100 score, and up to 3 flagged phrases. Use for a go/no-go before sending or for bulk screening of many drafts. No rewrites. For a full audit with reasons, subject-line risk, and rewritten copy, use analyze-email-deliverability. Content signals only; no inbox-placement guarantee.

## Output

Returns a verdict of pass, warn, or fail; a numeric deliverability score from 0 to 100; and up to three specific phrases found in the content that may negatively affect deliverability. Note: results reflect content signals only and do not guarantee actual inbox placement.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "description": "Alias of context"
  },
  "content": {
   "type": "string",
   "description": "Alias of context"
  },
  "context": {
   "type": "string",
   "description": "Input text, topic, or pasted content"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gigsoul-email-deliverability-checker-846f079e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.gigsoul.com](https://www.zero.xyz/host/api.gigsoul.com/llms.txt)