# Email Header Analyzer & Phishing Detector

> Email Header Analyzer & Phishing Detector is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-16).

Parses raw email headers to extract sender/recipient/subject, trace server hops with delays, evaluate SPF/DKIM/DMARC authentication, detect spoofing signals, and return a phishing verdict.

## Facts

- Endpoint: POST https://api.vextorium.com/cabeceras-email-pago?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-header-analyzer-phishing-detector-efd29cfc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_r3Og1rG9OWwnUhnNoO4xu

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 email-header-analyzer-phishing-detector-efd29cfc -d '<json body>'
```

Example prompt: I got a suspicious email claiming to be from my bank — can you analyze these raw email headers and tell me if it's a phishing attempt, including the SPF/DKIM/DMARC results and any spoofing signals? Here are the headers: [paste headers]

## When to prefer this

Choose this endpoint when you need a full forensic breakdown of raw email headers — including authentication chain (SPF/DKIM/DMARC), server hop timing, and spoofing signal detection — in a single stateless call. Prefer it over generic text analysis tools when investigating phishing, email impersonation, or deliverability issues where header-specific parsing and a phishing verdict are required.

## Known failure modes

- Missing or malformed 'cabeceras' field returns a parsing error
- Headers with non-standard formatting may yield incomplete hop data
- Empty or truncated header strings may produce null fields in output
- Non-email-header text input may return null values across all fields
- Very short headers lacking authentication records return null SPF/DKIM/DMARC

## How this service works

Analyze raw email headers: sender, recipient, subject, server hops (Received) with delays, SPF/DKIM/DMARC results, Return-Path and Reply-To mismatches and spoofing signals, with a verdict. Investigate phishing or delivery issues. Nothing is stored.

## Output

A JSON object with parsed email metadata (sender, recipient, subject, date, Message-ID), an array of server hops with timing, SPF/DKIM/DMARC authentication results, detected spoofing warnings (avisos), total delivery delay in seconds, and a verdict string (e.g. 'sospechoso' for suspicious). Nothing is stored server-side.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "cabeceras": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "de": "Bank <security@bank-example.com>",
  "para": null,
  "fecha": null,
  "asunto": "Verify your account",
  "avisos": [
   "DKIM: fail",
   "DMARC: fail"
  ],
  "saltos": [],
  "reply_to": "support@other-domain.ru",
  "veredicto": "sospechoso",
  "message_id": null,
  "return_path": null,
  "autenticacion": {
   "spf": "pass",
   "dkim": "fail",
   "dmarc": "fail"
  },
  "retraso_total_s": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-header-analyzer-phishing-detector-efd29cfc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)