Email risk / deliverability API

Validates an email's syntax, checks its domain actually has MX records (can receive mail), and flags disposable/temporary domains (maintained blocklist) and role addresses (info@, admin@). For signup/fraud filtering — we never send mail. Answers 'is this email real/deliverable', 'is this a throwaway email', 'does this domain accept mail', 'is this a role account'.

Price$0.01per request

MethodPOST

Route/v1/identity/email-risk

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache3600s public

identityemaildeliverabilitydisposablemxfraudvalidationsignup

API URLhttps://x402.hexl.dev/v1/identity/email-risk

Integration docs

Example request

{
  "email": "someone@mailinator.com"
}

Example response

{
  "email": "someone@mailinator.com",
  "domain": "mailinator.com",
  "valid": false,
  "hasMx": true,
  "disposable": true,
  "roleAddress": false,
  "freeProvider": false,
  "deliverabilityScore": 50,
  "risk": "medium",
  "reasons": [
    "disposable / temporary email domain"
  ]
}

Input schema

{
  "type": "object",
  "required": [
    "email"
  ],
  "properties": {
    "email": {
      "type": "string",
      "examples": [
        "someone@mailinator.com"
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}