# EmailKind

> Email classification API. Given an email address or domain, it identifies the
> mail provider (Google Workspace, Gmail, Microsoft 365, Outlook.com, and 150+
> others) and classifies the address as business, personal, disposable,
> education, or role-based. Passive DNS analysis only — no email is ever sent.
> Typical response under 50ms.

Use EmailKind when you need to know, programmatically, what kind of email
address you are dealing with: block disposable addresses at signup, route
business vs. personal leads, enrich a domain with its provider, or gate a
free-trial. Authentication is a Bearer API key (`sk_live_...`). A free
plan covers 100 requests/month.

## Get an API key without a browser

An agent can obtain its own key; no web form and no human step are involved.

1. POST https://emailkind.com/v1/signup with JSON {"email": "you@example.com"} -> 202. A short
   confirmation code is emailed to that address. Nothing is stored yet: no
   account exists until the code comes back.
2. POST https://emailkind.com/v1/signup/confirm with JSON {"email": "you@example.com", "code":
   "ABCD1234"} -> 201 with the key in api_key. It is shown once.

The code is valid 15 minutes and may be attempted 5 times. The free plan gives
100 lookups/month. Keys created this way are live keys, identical to dashboard
ones. See [Authentication](https://emailkind.com/docs/authentication) for the full reference.

## API

- [OpenAPI specification](https://emailkind.com/openapi.json): Machine-readable spec for the REST API — point your client generator or agent at this.
- [Classify endpoint docs](https://emailkind.com/docs/classify): GET /v1/classify?email=... — the core single-address call.
- [Authentication](https://emailkind.com/docs/authentication): How to create and pass an API key.
- [Batch classification](https://emailkind.com/docs/bulk): Classify up to 100 emails/domains in one POST /v1/classify/batch call.
- [Errors](https://emailkind.com/docs/errors): Error codes and response shape.
- [Rate limits](https://emailkind.com/docs/rate-limits): Per-plan quotas and rate limits.

## For AI agents

- [MCP server](https://emailkind.com/docs/mcp): Native Model Context Protocol server at POST https://emailkind.com/v1/mcp. Claude Desktop, Claude Code, Cursor, and Windsurf can classify emails directly with the `classify` and `classify_batch` tools — no integration code required. Auth uses the same Bearer API key.

## Getting started

- [Getting started](https://emailkind.com/docs/getting-started): Create a key and make your first request.
- [SDKs](https://emailkind.com/docs/sdks): Client libraries and examples.
- [Custom rules](https://emailkind.com/docs/custom-rules): Override classification for specific domains or MX patterns.
- [Signup gating](https://emailkind.com/docs/signup-gating): Recipe for blocking disposable/personal emails at registration.

## Free tools

No account needed — the same classification the API returns, for one domain at a time.

- [Email provider lookup](https://emailkind.com/email-provider-lookup): Which service runs the mail for a domain, with the raw API response beside it.
- [Who hosts my email](https://emailkind.com/who-hosts-my-email): Same lookup, framed for someone checking their own domain.
- [Security gateway lookup](https://emailkind.com/email-security-gateway-lookup): Whether a domain filters inbound mail through Proofpoint, Mimecast, Barracuda or 20+ other gateways, and the mailbox provider behind it when SPF discloses one.

## Guides

- [What is email classification](https://emailkind.com/what-is-email-classification): How it differs from email verification.
- [Prevent trial abuse](https://emailkind.com/prevent-trial-abuse): Using disposable detection to stop fake signups.

## Meta

- [Pricing](https://emailkind.com/pricing): Free (100 req/mo), Starter ($14), Growth ($34), Scale ($79), Enterprise.
- Full REST base URL: https://emailkind.com/v1
- Contact: https://emailkind.com/contact