Viktor does his best work when he can reach the tools your team already uses. Every integration connects through the tool's own secure sign-in — no API keys to paste, and you can revoke access at any time.

## Connect an app

1. Open the [Integrations screen](https://app.viktor.com/integrations) and find the app you want.
2. Select **Connect**. A secure sign-in window opens for that app.
3. Sign in and approve the access Viktor requests.

Once connected, the app shows as active on the Integrations screen and Viktor can use it in conversations, scheduled tasks, and API runs.

## What to connect first

Start with the tools where your work actually lives:

- **CRM** — HubSpot, Salesforce
- **Analytics** — PostHog, Google Analytics
- **Ads** — Google Ads, Meta Ads
- **Engineering** — GitHub, Linear
- **Productivity** — Notion, Google Calendar, Gmail

With 3,200+ integrations available, most of your stack is already covered. Browse the full catalog on the [integrations page](/integrations).

## Tool not in the catalog?

Viktor can also connect to custom MCP servers and APIs, and can build the missing integration from a tool's API documentation. See [request a new integration](/help/category/integrations/request-a-new-integration) for how to get one added.

## Managing access

- Review or disconnect any integration from the [Integrations screen](https://app.viktor.com/integrations).
- Viktor only receives the access each app grants during sign-in.
- If a connection stops working, see [reconnect an integration](/help/category/integrations/reconnect-an-integration).