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Claude Preview. claude.ai and Claude Desktop add the server as a custom connector and run the full OAuth 2.1 flow — there is no field for pasting a key on most accounts, and that is deliberate on Anthropic’s side.

Using Claude Code instead?

The terminal client takes a tgcc_ bearer key and is one command — and one committed .mcp.json gives the whole team the same connection.

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Add the connector

Custom connectors are added under Settings → Connectors → Add custom connector. Paste the endpoint:
1

Paste the URL

Claude fetches /.well-known/oauth-protected-resource to learn which authorization server issues tokens for this resource and which scopes it understands. Nothing to configure — the server advertises it.
2

Sign in and consent

You are sent to the dashboard, then shown a consent screen naming Claude and the exact scopes it is asking for. That screen is the decision point: it is where you choose what a model may do with your workspace.
3

Enable it in a chat

The connector appears in the tools menu. Turn it on per conversation.
Then ask for something:
List the agents in my ImpelLabs workspace and tell me which are published.
Some organisations also see a Request headers field in that dialog, which takes a tgcc_ key directly as Bearer tgcc_… (the space after Bearer matters). It is beta and not enabled everywhere — if you do not see it, use OAuth, which is the supported path for every account.
Anthropic’s servers make the connection, not your laptop. A host on a VPN or a private network will not connect from claude.ai however well it works from Claude Code.

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Which one to use

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Two things that will surprise you

Extractions, reports, knowledge ingestions and jobs are queued, always. The tool returns the job id and Claude has to poll before it can honestly say the work finished. This is not a failure and it is not a timeout.
Upload returns success while parsing continues in the background. Asking for the document’s text straight afterwards returns 409 document_not_processed until parsing finishes. Claude will retry if you tell it to; it cannot know to wait unless the tool description says so, and it does.

Tools

What is callable, and the scope each one demands.

Claude Code

The CLI: a bearer key, project scope, and a shared .mcp.json.