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

# Overview

> Connect third-party tools to Tracecat: how integrations work, how to authenticate them, and where to find the full catalog.

## What is an integration?

Third-party integrations are actions under the `tools.*` namespace that call a vendor API.
Each integration is either a YAML template built from core action steps or a Python UDF.

## Authenticate an integration

Most integrations require a secret before their actions run.
Store API keys and tokens as [prebuilt credentials](/automations/integrations/prebuilt-credentials), or connect a provider through [OAuth](/automations/integrations/oauth-integrations).

## Browse the catalog

Every available integration has its own page in this tab's sidebar, listing each action and its inputs.

## Build your own

When the catalog does not cover a vendor, build the integration yourself as a YAML template or Python UDF.
See [Custom actions](/custom-actions/custom-registry) to get started.