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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 Snowflake lets Claude run queries against your warehouse from any channel under the bundle’s scope. Add it as a custom credential with Connect another app; Snowflake has no preset button in the picker. This is an HTTP API connection, not a personal claude.ai connector.

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Create the credential in Snowflake

Create a dedicated Snowflake user for the agent with a read-only role scoped to the databases and schemas Claude should query. Generate a programmatic access token for that user. Snowflake’s guide for the SQL REST API and authentication is at docs.snowflake.com.

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Add the connection to a bundle

In the bundle, click Connect another app at the bottom and choose Bearer. Bearer is the only supported credential type for Snowflake; key-pair authentication is not currently supported.
FieldValue
Credential typeBearer
Custom headersAdd a row with Name Authorization, Prefix Bearer , and Value set to the programmatic access token from Snowflake
Allowed websites<your-account>.snowflakecomputing.com
Replace <your-account> with your Snowflake account identifier. To change the host later, open the ⋮ menu on this connection in the bundle’s Credentials tab and choose Edit. 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?
Snowflake appears in the list once the connection is live. New connections apply to new threads only.