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Email Provider Detector by Domain
x402
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.
Price / call$0.003
Success—
StatusUnknown
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.
Example use cases
B2B lead email stack research
“Before we reach out to salesforce.com, can you check what email provider they're using? I need to know if they're on Google Workspace or Microsoft 365 so we can personalize the outreach.”
Email deliverability audit
“We're having delivery issues sending to hubspot.com — can you check what email service they use, whether they have a spam filter in place, and what other senders their SPF record includes?”
Competitor email infrastructure check
“Can you look up what email system our competitor notion.so is running, including any antispam filters or third-party senders they've configured?”
Technical details
Endpoint
POSThttps://api.vextorium.com/proveedor-email-pago?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| dominio | string |
Output
Schema · Response
{
"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"
]
}
}Tags
x402
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