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You sign in with your ThinkOut account, the same one you use in the app. There are no API keys to copy, and the assistant only sees the workspaces you gave it access to.

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Claude

1

Open connector settings

In Claude, go to Customize → Connectors → Add custom connector.
2

Add the server

Name it ThinkOut and enter the address https://mcp.thinkout.io
3

Sign in

Turn on sign-in, save, and authorise with your ThinkOut account.
Adding the ThinkOut custom connector in Claude settings

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Claude Code

Open the terminal and insert:
Then run /mcp and complete the sign-in in your browser.

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Codex

Open the terminal and insert:

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Gemini CLI

Add the server to ~/.gemini/settings.json:
Then run /mcp auth thinkout.
On Gemini Enterprise, the administrator has to request client credentials from the ThinkOut team first.

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ChatGPT

1

Turn on developer mode

In Settings, enable developer mode.
2

Create the connector

Add a connector pointing to https://mcp.thinkout.io
3

Sign in

Complete the ThinkOut authentication when prompted.
Adding the ThinkOut connector in ChatGPT developer mode

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Other clients

Any MCP-compatible client that supports Streamable HTTP with OAuth can connect at the address https://mcp.thinkout.io