# Email Provider Detector by Domain

> Email Provider Detector by Domain 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).

Identifies which email service a domain uses (Google Workspace, Microsoft 365, Zoho, Proton, etc.) by analyzing its MX and SPF records, plus corporate spam filters and additional senders.

## Facts

- Endpoint: POST https://api.vextorium.com/proveedor-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-provider-detector-by-domain-01b7b00c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vlrmvOixRUJ9p3S1WT_Ys

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-provider-detector-by-domain-01b7b00c -d '<json body>'
```

Example prompt: What email provider does anthropic.com use — is it Google Workspace, Microsoft 365, or something else? Check the MX and SPF records.

## When to prefer this

Use this endpoint when you need to identify the email platform behind a specific business domain for B2B sales targeting, deliverability audits, or IT research. It is purpose-built for email provider detection via MX and SPF analysis, returning structured provider names rather than raw DNS data — making it faster and more actionable than generic DNS lookup tools for this specific need.

## Known failure modes

- Domain has no MX records — recibe_correo returns false and proveedor may be null
- Domain does not exist or is unreachable — may return error or empty result
- Unusual or private MX configurations not matching known providers — proveedor may be unknown or null
- Rate limit or payment failure (x402 protocol) — request rejected before DNS lookup
- Malformed domain input — API returns validation error

## How this service works

Detect which email service a domain uses (Google Workspace, Microsoft 365, Zoho, Proton, OVH, IONOS...) from its MX and SPF records, plus corporate spam filters and other senders. For B2B sales and audits.

## Output

Returns the detected email provider name (e.g. 'Google Workspace', 'Microsoft 365'), the domain queried, a boolean indicating if the domain receives email, the MX record hostnames, a list of SPF-authorized senders, detected spam/corporate filters, any other providers detected, and an optional note.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "mx": [
   "alt1.aspmx.l.google.com",
   "alt3.aspmx.l.google.com"
  ],
  "nota": null,
  "dominio": "anthropic.com",
  "proveedor": "Google Workspace",
  "recibe_correo": true,
  "filtro_antispam": null,
  "otros_detectados": [],
  "envia_tambien_desde": [
   "_spf.google.com"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-provider-detector-by-domain-01b7b00c/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)