API Documentation

Email Verifier API

Verify email deliverability in real-time with SMTP checks, MX validation, and catch-all detection via our RESTful API.

Email Verifier API

LIVE

Email address

Real API data no signup required

cURL

curl --request GET \
  --url 'https://api.tomba.io/v1/email-verifier?email=john.doe@stripe.com' \
  --header 'X-Tomba-Key: ta_xxxxxxxxxxxx' \
  --header 'X-Tomba-Secret: ts_xxxxxxxxxxxx'

200400424500

{
  "data": {
    "email": {
      "email": "john.doe@stripe.com"
    },
    "result": "deliverable",
    "score": 97,
    "mx_records": true,
    "smtp_server": true,
    "regex": true,
    "disposable": false,
    "role": false,
    "free_email": false,
    "accept_all": false
  }
}

Based on verified reviews

The Most Reliable Email Verifier API API

Tomba has the largest B2B email crawler on the web. We process billions of pages monthly so you always get the freshest, most accurate data.

2B+

Pages crawled monthly

450M+

Verified B2B emails

70M+

Domains indexed

Ranked in benchmark

81%

Email coverage

<5%

Bounce rate

<200ms

API response

99.9%

Uptime SLA

42M+

Tech-indexed sites

150K+

Professionals

Independent 5,000-Lead Benchmark

Same input file, same conditions, every provider. Raw results, no spin.

View raw data Data updates Robots policy

Tomba.io

4,015

Anymailfinder

3,875

Findymail

3,757

GetProspect

3,096

Skrapp

2,142

Hunter

1,882

VoilaNorbert

1,800

Snov

1,007

Prospeo

846

More Data, Less Money No One Comes Close

Every plan includes free verification credits, phone data, and credits valid for 12 months.

Basic

$49 /mo

5,000 total credits

2,500 finder + 2,500 Free Verification

Integrate Email Verifier API in Your Language

Install Tomba in your language. 10 official SDKs, all open-source on GitHub.

composer require tomba-io/php

Ruby

gem install tomba

go get github.com/tomba-io/go

luarocks install tomba

install.packages("tomba")

Elixir

{:tomba, "~> 1.0"}

Full API documentation View on GitHub MCP Server

Email Verifier API API Features

SMTP Verification

Full SMTP handshake with the mail server to confirm the mailbox exists and accepts mail.

MX Record Check

Validates that the domain has active MX records pointing to real, responsive mail servers.

Catch-All Detection

Identifies domains that accept all emails so you know which results need extra caution.

Disposable Detection

Flags temporary emails from disposable providers like Mailinator and Guerrilla Mail.

Role-Based Detection

Identifies role-based addresses (info@, support@) with typically lower response rates.

Free Provider Check

Detects free providers (Gmail, Yahoo, Outlook) vs business domains for B2B filtering.

Format Validation

Regex-based syntax check before server-level verification.

Deliverability Status

Clear status: deliverable, undeliverable, risky, or unknown with detailed reason codes.

Sub-200ms Response

Real-time checks, not cached data. Fast enough for user-facing applications.

Bulk Verification

Verify thousands of emails at once. 400% faster than standard mode.

Free with Plans

Verification credits included free on every Tomba plan. No separate purchase needed.

Greylisting Handling

Smart retry logic handles servers that temporarily reject connections during verification.

Trusted Worldwide

Everyone is switching to Tomba.io

Join thousands of companies worldwide who trust Tomba for their email finding needs

Trusted by Developers Worldwide

Tomba.io is very fast with lots of features. I run leads from Apollo into Tomba and grab prospect info in record time. I'm saving at least 5 hours a week. No joke.

Julian M.

Account Executive, Insight

I've tested over a dozen email finder tools, and Tomba.io stands out as the best. It consistently delivers accurate results. The SDK and docs make integration fast.

Andrei Kholkin

Founder, Superpage.io

Stellar product and amazing support. I have tested many tools and this one is far superior by far. I highly recommend it.

Martin Ebongué

Entrepreneur, Genius Data Flow

Since years, Tomba has provided the most results per search, and it keeps getting better. It recently became one of the most feature-rich tools for our list building.