> ## Documentation Index
> Fetch the complete documentation index at: https://docs.api.tamtam.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Quickstart

> Make your first call to the TAMTAM API in under a minute.

This guide walks you through finding lookalike companies — one of the most common TAMTAM API use cases.

## Prerequisites

* A TAMTAM account API key. See [Authentication](/guides/authentication) if you don't have one.
* `curl` (or any HTTP client).

## Find lookalike companies

Given one or more input companies, the `multi-search-lookalikes` endpoint returns companies that resemble them, optionally filtered by country, industry, size, and more.

```bash theme={null}
curl -X POST https://api.tamtam.ai/api/v2/multi-search-lookalikes \
  -H "Authorization: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "input_companies": [
      { "domain": "stripe.com" }
    ],
    "hq_countries": ["FR", "DE"],
    "sizes": ["51-200", "201-500"],
    "paging": { "limit": 10 }
  }'
```

The response contains a list of `lookalikes` ranked by similarity, the `matched_inputs` showing how each input was resolved, and your remaining `credits`.

## Next steps

* Read about [Authentication](/guides/authentication) and [Rate limits](/guides/rate-limits).
* Understand how [Credits](/guides/credits) are consumed.