Integrations · MCP

Plug Siize into everything you run.

Payments, CRM, calendars, files, projects, code. Click Connect, sign in on the app's own page, and Carol works across all of it in one conversation.

Connect your first app Connect your AI to Siize
Carolin SiizeConnected to 12 apps
Coming soonEvery other app connects today
0Apps in the directory
0Connect today
1Click to connect
0Keys to paste
52 apps in the directory, and any app that speaks the open connector standard.
How connecting works

One click. Really.

No developer keys, no setup call. You sign in on the app's own page and Siize never sees your password.

1Pick the app

Find it in the directory and click Connect.

2Sign in on their page

The app's own sign-in window. You approve what Carol can do.

3It's live

Carol can use its tools right away, in any chat.

siize.ai/connections
Home
Carol
Connections
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Settings

Connect your apps

Carol can work in any app you connect.
Search 52 apps
+ Add by address
🔒 api.notion.com/v1/oauth/authorize
Siize wants to access your workspace
  • Read and search pages you share
  • Create and update pages
  • Read databases
CancelAllow access
✓Notion connected · 14 tools ready
Carol can now use Notion
The directory

Fifty-two apps. One sign-in each.

Thirty-three connect today. The rest are next in line.

Not in the directory?

Paste an address. Siize does the rest.

Any app that speaks the open connector standard works. Siize checks the address, finds how it signs in, registers itself, and hands you the sign-in. Apps you add stay private to your organization.

Try Add by address
Add by address
Paste the app's connector address.
Secure address checkedhttps · public
App answeredLinear
Sign-in page foundlinear.app
Siize registered itselfno developer setup
Continue to sign in
Siize MCP server

Your AI, working inside Siize.

Siize runs its own MCP server. Point Claude, Cursor, VS Code or your own agent at it and it can use the same tools Carol uses, scoped to your organization. Anything that changes your data comes back as a card a person approves.

  1. 01Create a key in your Siize settings. It sees only what your organization sees.
  2. 02Add the address to your AI tool, with your key.
  3. 03Ask. Siize tools show up by product, ready to use.
Works in __CL____CU____VS__ and any MCP client
Endpointhttps://siize.ai/mcp

   

   

   
Tool names are the real names on the Siize MCP server. Which tools a key sees depends on its organization and role.

  

 





 
Built to be trusted
Your apps. Your control.

 

  
Sign in on their page
Standard OAuth sign-in on the app's own site. Siize never sees your password.

  
Tokens stay encrypted
Access tokens live in an encrypted vault and refresh on their own.

  
Private to your organization
Apps you add by address are visible only to you or your team.

  
Disconnect any time
One click removes an app, and Carol loses access right away.

 





Connect your stack.
Put Carol to work.
Start with the apps you already open every morning.
Browse all 52 appsAdd by address