> ## Documentation Index
> Fetch the complete documentation index at: https://docs.51ultron.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Integrations

> 250+ integrations via Composio. 50+ MCP servers per session. Your entire stack accessible from chat.

Ultron connects to your existing tools. You don't replace your stack — Ultron operates it. Gmail, HubSpot, Stripe, Notion, Slack, Linear — all accessible from the chat interface without switching apps.

## Two integration layers

```text theme={null}
Ultron session starts
├── Fixed MCP servers (always loaded)
│   ├── context7          — library and API documentation
│   ├── apify             — web scraping at scale
│   ├── tavily            — AI-optimized search
│   ├── brave-search      — real-time web search
│   ├── fetch             — raw HTTP requests
│   ├── filesystem        — read/write in sandbox
│   ├── memory            — persistent key-value store
│   ├── puppeteer         — browser automation
│   ├── github            — repos, issues, PRs
│   ├── composio          — gateway to 250+ integrations
│   └── ultron            — platform callback hooks
├── User-connected servers (loaded per your settings)
│   ├── notion, slack, figma, linear, stripe, hubspot
│   ├── asana, sentry, vercel, supabase, cloudflare
│   └── intercom, postHog, webflow, monday, make, miro, canva
└── Composio (250+ integrations via one gateway)
    Available for any service not natively supported
```

## How to connect

Go to **Settings → Integrations**. Each integration shows its connection status and auth method:

* **OAuth** — click Connect, authorize in the popup, done
* **API key** — paste your key, it's validated and stored encrypted (AES-256)

Connected integrations are available in your next session automatically.

<CardGroup cols={2}>
  <Card title="Composio" icon="grid" href="/integrations/composio">250+ integrations via one gateway.</Card>
  <Card title="MCP Servers" icon="server" href="/integrations/mcp-servers">50+ pre-loaded servers per session.</Card>
  <Card title="Productivity" icon="briefcase" href="/integrations/productivity">Google Workspace, Notion, Slack, GitHub.</Card>
  <Card title="Sales & CRM" icon="chart-line" href="/integrations/sales-crm">HubSpot, Apollo, Stripe.</Card>
</CardGroup>