Email Validator

Validate an email address and get back a full quality signal: syntax, DNS, MX, disposable check, role account detection, and a quality score.

⚡ 2 credits per call

Try it

Fill in the fields below and hit Send.

Why use this

Agents don't just want valid/invalid. They want to decide: should I contact this person? Is this a real person or a bot? Is this address worth the effort?

One call runs all checks and returns a structured signal.

Pricing

Any email	2 credits

Request format

{ "email": "[email protected]" }

Field	Type	Notes
`email`	string	Required. Must be a valid email format.

Response

{
  "email": "[email protected]",
  "valid": true,
  "syntax": true,
  "dns": true,
  "mx": true,
  "role_account": false,
  "disposable": false,
  "free_provider": false,
  "domain_type": "corporate",
  "domain_age_days": 3200,
  "score": 0.93
}

Field	Type	Notes
`valid`	boolean	`true` only if syntax, DNS, and MX all pass
`syntax`	boolean	Basic format check
`dns`	boolean	Domain resolves in DNS
`mx`	boolean	Domain has mail exchange records
`role_account`	boolean	Local part is a role address (admin, support, sales…)
`disposable`	boolean	Domain is a known throwaway provider
`free_provider`	boolean	Domain is a known free email provider (Gmail, Yahoo…)
`domain_type`	string	`"disposable"` \| `"free"` \| `"corporate"` \| `"unknown"`
`domain_age_days`	number \| null	Days since domain registration. `null` if WHOIS unavailable.
`score`	number	0–1 quality signal. 1 = strong signal of a real address.

Score

Starts at 1.0. Deductions:

Signal	Deduction
Syntax / DNS / MX fail	→ 0 immediately
Disposable domain	−0.4
Role account	−0.2
Free provider	−0.1
Domain age < 30 days	−0.2
Domain age 30–364 days	−0.1
Domain age unknown	−0.05

Errors (400, no charge)

Error	Cause
`Email is required`	Empty email field
Zod validation error	Invalid email format

API Reference

Endpoint

POST https://api.lightningapi.tools/email-validator/validate

Required headers

Authorization: Bearer <apiKey>
Content-Type: application/json

Example request

{
  "email": "[email protected]"
}

Example response

{
  "email": "[email protected]",
  "valid": true,
  "syntax": true,
  "dns": true,
  "mx": true,
  "role_account": false,
  "disposable": false,
  "free_provider": false,
  "domain_type": "corporate",
  "domain_age_days": 3200,
  "score": 0.93
}