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

# Connectors

> Connectors link Felix to the tools and data sources your workflows read from and write to.

Once connected, you reference a connector in any workflow step using an `@mention` — `@Slack`, `@GoogleDrive`, `@OpenAI`. Felix handles authentication, API calls, and response parsing automatically.

## How connectors work

Connect a service once. After that, it's available across all your workflows.

```
Fetch all contracts added to @GoogleDrive in the last 7 days.
Extract the key clauses from each one using @Anthropic.
Write the results to @GoogleSheets.
```

Felix uses the `@mention` to identify the right connector, call the correct APIs, and handle authentication — without you writing any integration code.

## Connector types

**AI models** — Anthropic, OpenAI, and Google Gemini are available in every Felix account by default. No setup required. See [AI Models](/docs/connectors/ai-models).

**Built-in connectors** — Pre-built integrations with commonly used services. Connect them once from **Settings → Connectors**. See [Built-in Connectors](/docs/connectors/built-in).

**Custom connectors** — Connect any REST API not in the built-in list. Provide a name, your API credentials, and a description of what the API does. See [Custom Connectors](/docs/connectors/custom).

## Adding a built-in connector

1. Go to **Connectors** in the sidebar menu
2. Find the service you want to connect and click **Connect**
3. Authenticate via OAuth or enter your API key
4. Done — the connector is available in all your workflows

<Frame caption="The Connectors page">
  <img src="https://mintcdn.com/script-d59ec6ee/hVJSxxSuBBY-jB5K/images/connectors.png?fit=max&auto=format&n=hVJSxxSuBBY-jB5K&q=85&s=f0bcf36e50307e3e2eadd24f3d03f9e1" width="3280" height="2046" data-path="images/connectors.png" />
</Frame>

You can also connect a service mid-build. If you `@mention` a connector that isn't connected yet, Felix will prompt you to authenticate before continuing.

<Frame caption="Felix prompting you to connect a service mid-build">
  <img src="https://mintcdn.com/script-d59ec6ee/hVJSxxSuBBY-jB5K/images/connectors-inline-auth.png?fit=max&auto=format&n=hVJSxxSuBBY-jB5K&q=85&s=28cb248e7ec0a0b1c7cce80003c1c404" width="1426" height="1092" data-path="images/connectors-inline-auth.png" />
</Frame>

## Managing your connectors

From **Settings → Connectors** you can:

* See all connected services and their status
* Reconnect a service if authentication has expired
* Revoke access to a service at any time

Credentials are encrypted at rest. Felix only uses them when a workflow step requires it.

## Tips

* **AI models need no setup.** `@Anthropic`, `@OpenAI`, and `@Gemini` work immediately in any step.
* **Connect your tools before building.** Having connectors set up in advance means Felix can reference them without interrupting the build flow.
* **Use `@mentions` explicitly.** `@GoogleDrive` is clearer than "my file storage" — Felix generates more accurate code when connectors are named directly.

<CardGroup cols={3}>
  <Card title="Built-in Connectors" icon="puzzle-piece" href="/docs/connectors/built-in">
    Browse all supported services
  </Card>

  <Card title="AI Models" icon="brain" href="/docs/connectors/ai-models">
    Use Anthropic, OpenAI, and Gemini
  </Card>

  <Card title="Custom Connectors" icon="wrench" href="/docs/connectors/custom">
    Connect any REST API
  </Card>
</CardGroup>