How to Use the Email Validator API — Free REST + MCP Server

#email #api #validation #mcp

Bounced emails destroy your sender reputation. This API validates syntax, checks MX records, detects disposable providers (like mailinator, guerrillamail), and suggests corrections — all in one call.

Try It Right Now

curl -s -X POST https://api.lazy-mac.com/email/validate \
  -H "Content-Type: application/json" \
  -d '{"email": "test@gmail.com"}' | jq

Response:

{
  "email": "test@gmail.com",
  "syntax": { "valid": true },
  "disposable": { "is_disposable": false },
  "mx": {
    "has_mx": true,
    "mx_records": [
      { "priority": 5, "exchange": "gmail-smtp-in.l.google.com" },
      { "priority": 10, "exchange": "alt1.gmail-smtp-in.l.google.com" }
    ]
  },
  "domain": { "domain_exists": true },
  "spf": { "has_spf": true }
}

All Endpoints

Endpoint	Description
`POST /validate`	Full validation (syntax + MX + disposable + SPF)
`POST /validate/batch`	Validate multiple emails at once
`POST /domain`	Check domain MX and SPF only
`POST /suggest`	Suggest corrections for typos

Batch Validation

curl -s -X POST https://api.lazy-mac.com/email/validate/batch \
  -H "Content-Type: application/json" \
  -d '{"emails": ["user@gmail.com", "fake@mailinator.com", "bad@nonexistent.xyz"]}' | jq

Detect Typos

curl -s -X POST https://api.lazy-mac.com/email/suggest \
  -H "Content-Type: application/json" \
  -d '{"email": "user@gmial.com"}' | jq

Use as an MCP Server

{
  "mcpServers": {
    "email": {
      "url": "https://api.lazy-mac.com/email/mcp"
    }
  }
}

Ask Claude: "Is this email valid? Check the MX records for support@company.com"

Node.js Example

const res = await fetch("https://api.lazy-mac.com/email/validate", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({ email: userInput })
});
const result = await res.json();
if (!result.syntax.valid || result.disposable.is_disposable) {
  throw new Error("Invalid email");
}