Email verification API for developers

Stop bad emails
before they get in.

Catch malformed, disposable, role-based, and unroutable addresses before they create fake accounts, wasted trials, and unusable leads.

Get a free API key Read the REST docs

Stop broken addresses at the door.

Catch obvious mistakes before they pollute your customer data or trigger a workflow that cannot succeed.

See the risk behind the domain.

Recognize temporary and free providers early, then apply the signup rules that fit your product.

Check the complete address.

Get the strongest answer available without turning an uncertain result into a false rejection.

Make the decision in your product.

Allow, review, or block with one stable result your application can use immediately.

From email to decision.

Stop broken addresses at the door.

Catch obvious mistakes before they pollute your customer data or trigger a workflow that cannot succeed.

See the risk behind the domain.

Recognize temporary and free providers early, then apply the signup rules that fit your product.

Check the complete address.

Get the strongest answer available without turning an uncertain result into a false rejection.

Make the decision in your product.

Allow, review, or block with one stable result your application can use immediately.

Keep bad signups out.
Keep good users moving.

Approve good addresses faster and stop fake accounts before they consume trials, seats, sales time, or customer data.

Cleaner data

Reject addresses that cannot work

Catch malformed addresses, typos, and domains that cannot receive email before they enter your product.

Less abuse

Stop disposable signups

Protect trials and promotions from temporary providers and risky role accounts.

Honest results

Keep uncertainty visible

When a provider does not give a clear answer, the result stays unknown instead of rejecting a legitimate user.

Easy automation

Act on one stable result

Route deliverable, risky, undeliverable, and unknown addresses straight into your product logic.

Your first verification takes one request.

Use REST from any stack, generate a typed client from OpenAPI, or call the same verifier through MCP.

REST API docs MCP docs

terminalcurl

$ curl -X POST https://emailverifier.dev/api/v1/verify \
  -H "Content-Type: application/json" \
  -d '{"email":"hello@company.com"}'

# → {
  "email": "hello@company.com",
  "status": "deliverable",
  "action": "allow",
  "flagged": false,
  "signals": ["mailbox_accepts_mail"],
  "suggestion": null
}

Domain intelligence