# Find a company's email format: agent skill

Company email format API for an agent: it sends a company domain to a catalog endpoint and reads email pattern such as first.last, share of addresses that use it and other patterns in use back. Several providers sell the call, so the agent tries the cheapest first. You pay per call, and a failed call costs nothing.

## When it starts

- what is the email format at example.com
- how are emails written at this company
- guess the email pattern for example.com

## What it asks for

- A company domain

## How it runs

- looot discover finds the endpoint
- looot inspect shows the price and the input schema
- looot run executes it, billed per call
- Endpoints in order: tomba-email-format, thecompaniesapi-companies-email-patterns

## What comes back

- Email pattern such as first.last
- Share of addresses that use it
- Other patterns in use

## Answer rule

Give the pattern with an example, the share of addresses that follow it, and any second pattern in use. Say a pattern is a guess until an address is verified.

## Install

Save the skill file as /agent-skills/company-email-format/SKILL.md, or tell your agent: set up looot, then use /agent-skills/company-email-format/SKILL.md.

## Difficulty

easy

## Which email patterns are the most common?

Common patterns are first.last, first, flast and first_last at the company domain. A provider returns the ones it has seen for this domain, so you do not have to guess. Your agent tests the likeliest first.

## How do I find a company's email format?

Send the company's domain to an email-format endpoint. The answer is the pattern or patterns the domain uses, such as first.last@example.com. Your agent can then build an address for any name.

## Is it free to find a company's email format?

One provider here returns the patterns at no charge. The other bills a small amount per lookup. The live prices on this page show the current state.

## Is a built email address reliable?

Not on its own. A pattern tells you how the company usually forms addresses, not that this mailbox exists. Run the address through a verifier before you send.

## What if a domain has more than one pattern?

Both providers can return several. Your agent builds one address per pattern and verifies each. The first one that passes is the one to use.

## How much does one domain cost?

You pay per call, and the price depends on the provider your agent picks. This page reads the cheapest live price from the catalog and shows no number when the catalog is unreachable.