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Connections are added inside an Access bundle. At claude.ai/admin-settings/claude-tag, open Access bundles in the left navigation, click into a bundle (or Create one), and go to its Credentials tab.
Connecting Notion lets Claude ground answers in your Notion workspace from any channel under the bundle’s scope. You add it as a connection inside an Access bundle; the credential belongs to the agent, not to any person. Pair this connection with the Notion plugin from Anthropic’s plugin marketplace so Claude knows how to call the API; see Attach plugins. This is an HTTP API connection, not an MCP server or a personal claude.ai connector.

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Create the credential in Notion

Create an internal integration in Notion and share the specific pages or databases Claude should read with that integration. Nothing is reachable until shared. Notion’s own guide for creating the credential is at developers.notion.com.

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Add the connection to a bundle

In the bundle, click Connect next to Notion.
FieldValue
Claude’s integration secretThe internal integration secret from Notion
Allowed websitesapi.notion.com
The Agent Proxy injects the credential at the network boundary; the model and the sandbox are not given the key. See how Agent Proxy works.

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Verify the connection

In a channel under the bundle’s scope, in a new thread: 
@Claude what can you access from this channel?
Notion appears in the list once the connection is live. New connections apply to new threads only.