Server data from the Official MCP Registry
Email-domain intelligence: MX capability, provider, disposable status, SPF, DMARC, and MTA-STS.
About
Email-domain intelligence: MX capability, provider, disposable status, SPF, DMARC, and MTA-STS.
Remote endpoints: streamable-http: https://mailtype-api.onrender.com/mcp
Security Report
Valid MCP server (1 strong, 1 medium validity signals). No known CVEs in dependencies. Imported from the Official MCP Registry.
Endpoint verified · Requires authentication · 1 issue found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Connect
Remote Plugin
No local installation needed. Your AI client connects to the remote endpoint directly.
Add this to your MCP configuration to connect:
{
"mcpServers": {
"io-github-gsterlingpress-mailtype": {
"url": "https://mailtype-api.onrender.com/mcp"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
MAILTYPE
Email/domain → objective mail capability intelligence.
MAILTYPE is a tiny REST + MCP API for applications that need fast, objective domain-level email infrastructure answers before accepting, storing, routing, or acting on an email address.
Live API: https://mailtype-api.onrender.com/docs
OpenAPI: https://mailtype-api.onrender.com/openapi.json
Playground: https://mailtype-api.onrender.com/play?q=gmail.com
MCP endpoint: https://mailtype-api.onrender.com/mcp
What it returns
DOMAIN_EXISTSCAN_RECEIVE_MAIL- MX records and provider
- disposable-domain evidence
- SPF
- DMARC
- MTA-STS
- confidence, evidence, and
checked_at
Why MAILTYPE
MAILTYPE deliberately does not perform SMTP probing or claim that an individual mailbox exists. It answers the cheaper, objective domain-level questions that software often needs first. UNKNOWN is a valid answer whenever the evidence is insufficient.
REST
curl -H "X-API-Key: YOUR_KEY" \
https://mailtype-api.onrender.com/v1/domain/gmail.com
curl -H "X-API-Key: YOUR_KEY" \
https://mailtype-api.onrender.com/v1/email/person@gmail.com
MCP
Endpoint: POST https://mailtype-api.onrender.com/mcp
Tool: inspect_mail_domain
Input:
{"input":"gmail.com"}
Public discovery endpoints
- Docs: https://mailtype-api.onrender.com/docs
- Playground: https://mailtype-api.onrender.com/play?q=gmail.com
- OpenAPI 3.1: https://mailtype-api.onrender.com/openapi.json
- Sources and methodology: https://mailtype-api.onrender.com/sources
- Health: https://mailtype-api.onrender.com/health
Data and standards
MAILTYPE uses DNS evidence plus a maintained legally reusable disposable-domain dataset. The API exposes its methodology and source disclosure publicly. Relevant standards include RFC 5321, RFC 7505 (Null MX), RFC 7208 (SPF), RFC 7489 (DMARC), and RFC 8461 (MTA-STS).
Hard boundary
MAILTYPE does not verify that a mailbox exists, connect to recipient SMTP servers, send email, infer deliverability from opaque scores, or claim CAN_RECEIVE_MAIL=YES without explicit MX evidence. If a domain exists but explicit MX evidence is insufficient, MAILTYPE returns UNKNOWN.
Stranger Verification Standard
Our own tests, health probes, validators, uptime traffic, and known internal callers do not count as adoption. A tool call alone does not automatically become a verified stranger; outside calls remain unverified until evidence supports credible real use.
Keywords
email API · domain API · MX lookup API · disposable email domain API · SPF API · DMARC API · MTA-STS API · email infrastructure · email validation preflight · MCP server · developer API
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