TombaTomba
Start free
  • Documentation
  • API reference
  • SDKs & CLI
  • AI & MCP
  • Integrations
  • Enterprise
  • Migration guides

Find, verify and enrich B2B contacts from public sources, in the app, your spreadsheet or through the API.

GDPR & CCPA

// docs

  • API changelog
  • Support options
  • Security

// platform

  • Dashboard
  • Pricing
  • API status

// resources

  • Help center
  • Product updates
  • TombaBot crawler

// company

  • Website
  • Contact us
  • Edit or remove your data

© 2021–2026 Tomba.io

  • Terms of service
  • Privacy policy
  • Cookie policy
  • Security policy
  • GDPR
  • CCPA
Get started
Platform
API guides
Response reference
    Person responseCompany responseEmail verifier responseEmail count responseEmail format responseSources responseLocation responsePhone responseSimilar domains responseTechnology responseDomain suggestionsEnrichment responseNAICS codesSIC codes
Policies
Resources
Response reference

Email format response

Returned by GET /email-format at data: the formats that a domain's email addresses follow, with the share of known addresses that use each one. The same pattern syntax is used by the pattern field of company and person responses.

Fields

FieldTypeDescription
formatstringThe pattern. See Patterns.
percentageintegerShare of the domain's known addresses that use this pattern, from 0 to 100.

data holds up to 20 formats, in no particular order; sort by percentage to find the most common. It's an empty array when Tomba has no formats for the domain.

Patterns

A pattern combines these tokens, either joined directly or separated by ., _, or -:

TokenReplaced withFor Jane Doe
{first}First namejane
{last}Last namedoe
{f}First initialj
{l}Last initiald

For example, {first}.{last} gives jane.doe, {f}{last} gives jdoe, and {last}_{f} gives doe_j.

Example

GET /email-format?domain=stripe.com:

Code
{ "data": [ { "format": "{first}", "percentage": 66 }, { "format": "{first}.{last}", "percentage": 34 } ] }
Last modified on September 30, 2026
Email count responseSources response
On this page
  • Fields
  • Patterns
  • Example
JSON