API Documentation

Email Format API

Detect the email format patterns used by any company domain. Returns all detected patterns with their percentage distribution so you can predict employee addresses.

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Email Format API

LIVE

Company domain

Real API data no signup required

cURL

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

200400429

{
  "data": [
    {
      "format": "{first}.{last}",
      "percentage": 72
    },
    {
      "format": "{f}.{last}",
      "percentage": 18
    },
    {
      "format": "{first}",
      "percentage": 10
    }
  ]
}

Based on verified reviews

The Most Reliable Email Format 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

80M+

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 Format 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 Format API API Features

Pattern Detection

Detect all email patterns used by a company (e.g., first.last@, f.last@, first@, last.first@).

Percentage Distribution

Each pattern includes its usage percentage so you know the most common format.

Predict Addresses

Use the dominant pattern to generate email addresses for any employee at the company.

Improve Deliverability

Knowing the correct format reduces bounce rates and protects your sender reputation.

Real-Time Analysis

Patterns are computed from our continuously updated database of 450M+ verified contacts.

Multiple Patterns

Companies often use more than one format. Get all variants ranked by frequency.

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Everyone is switching to Tomba.io

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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.