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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 HubSpot lets Claude pull pipeline, deal, and contact state 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 HubSpot 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 HubSpot

Create a private app and select the read scopes you need (typically crm.objects.contacts.read, crm.objects.companies.read, crm.objects.deals.read). The private app acts as its own identity in HubSpot’s audit log. HubSpot’s own guide for creating the credential is at developers.hubspot.com.

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Add the connection to a bundle

In the bundle, click Connect next to HubSpot.
FieldValue
Claude’s private app tokenThe private app token from HubSpot
Allowed websitesapi.hubapi.com (preset). To add a different host, use the Advanced tab.
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?
HubSpot appears in the list once the connection is live. New connections apply to new threads only.