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Vistazo’s MCP server is at:
It is a streamable-HTTP endpoint behind OAuth 2.1, so any client supporting remote MCP servers works. The first call opens a browser to sign you in.
Settings → Developer in the app carries these same snippets, filled in and ready to copy, for Vistazo’s server and the curated sources. A Vistazo-hosted connection’s Add to an agent menu item is a shortcut to it.

Setup by client

Run in any terminal with the claude CLI; add --scope user to register it for all projects.
Signing in shows a consent screen. It asks for one thing that matters: which workspaces this client may reach.
  • Tick the workspaces you want this client to work in. A call naming any other workspace is refused, and the restriction is enforced server-side rather than by the client behaving well. With a single workspace there is nothing to choose and the screen just tells you which one.
  • The first workspace you tick is the billing default. Calls to the public curated sources (weather, World Bank, Treasury, exchange rates, SEC EDGAR) have no workspace argument to give them, so their usage is booked to that one.
Pick deliberately if you are in several workspaces. You can re-authorize later to change the set.

Managing what you have connected

Settings → Security → Authorized apps lists every client you have authorized and when it was last used, with a Revoke button. Access tokens last an hour and refresh in the background, and refresh tokens last 30 days and extend each time they are used, so a client you use regularly stays connected. Revoking takes effect within about a minute: an access token already issued cannot be recalled, so the server re-checks the grant behind a short cache instead of waiting for the token to expire.
One client can hold separate authorizations for Vistazo’s core server and for each curated source — they are distinct endpoints, and connecting a second does not disturb the first.

First calls

A good opening sequence:
From there, Widgets is where building starts. If the workspace has skills, reading the relevant one first is usually cheaper than inferring the conventions it already records.