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Connect a tool once and it shares memory with every other tool you’ve connected. Claude learns something on Monday, Cursor knows it on Tuesday. Each connection takes one to three minutes. Most of these connect over MCP. WhatsApp is different: you link a phone number instead of configuring a client, and you talk to xysq in a chat.

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What a connection gives your tool

Every connected tool talks to the same context lake: one per user or team, holding your context graphs (Personal, Teams, Agents). A tool you connect here reads and writes your personal graph by default, and any team you belong to when you name it. The connection exposes four MCP tools. That’s the whole surface; your AI tool does no orchestration.

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Two ways to authenticate

  • OAuth (Claude, Claude Code, ChatGPT): sign in through your browser once. No key to copy.
  • API key (Cursor, Windsurf, Antigravity, generic clients): a bearer token you generate in the app’s connect guide. The full value is shown exactly once. You have one personal key, shared by every tool you paste it into: generating a new one replaces the old one, so anywhere you already pasted it stops working until you update it.
Server endpoints, if your client asks:
The MCP endpoint takes your personal key (or OAuth) and reaches your personal and team context. An agent key, the kind you mint for the SDK, is rejected here: agent keys go to /sdk and reach agent graphs only. That wall is deliberate, so an agent you hand a key to can never read your own memory.

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Pick your tool

Claude Code

Install the plugin, sign in via /mcp. ~1 min, OAuth.

Claude

Add a custom integration in Settings. ~3 min, OAuth.

Cursor

One-click install or paste the config. ~2 min, API key.

ChatGPT

Create an app in ChatGPT settings. ~2 min, OAuth.

Windsurf

Paste the config and restart. ~2 min, API key.

Antigravity

Direct SSE connection with header support. ~2 min, API key.

Any MCP client

Streamable HTTP or legacy SSE. ~2 min, API key.

WhatsApp

Link your number and text your memory. ~1 min, no client config.
The in-app guides at app.xysq.ai walk the same steps with your key and config pre-filled, and watch for your tool’s first call to confirm the connection is live. These pages mirror them for reference.