Gmail and Google Drive connector
This is a private Gmail and Google Drive connector operated by Latinum Labs, for Summer Holdings Group LLC. It is not a website and has no interface of its own — it exists so an AI assistant, over the Model Context Protocol, can read the mailboxes and Drive folders that have been authorized into it.
Its purpose is to let one connection reach several Google accounts at once, so that accounts payable and accounts receivable mailboxes can be worked with side by side without disconnecting and reconnecting between them.
Access
This connector is restricted to approved Google accounts. If yours has not been approved, adding the connector will appear to work until you sign in to Google, at which point the authorization is refused and nothing is connected.
To request access, email max@summertax.com with the Google address you sign in with — that address is what gets approved, so it has to be the one you actually use.
Adding the connector to Claude
Once, per person:
- In Claude, open Settings → Connectors and choose Add custom connector.
- Paste this address:
https://gws.latinumlabs.dev/mcp - Claude registers itself and opens Google's sign-in. Sign in with the account your access was granted to. Because this app is not verified by Google, you will see a warning screen — choose Advanced, then continue.
- Leave the Gmail and Drive permissions ticked, and confirm.
Adding more accounts
Every further mailbox is added the same way:
- Ask Claude to run
connect_account. It returns a one-time link. - Open the link and sign in as the account you are adding.
- Repeat for each mailbox.
Signing in as a different Google account is expected here — that is how a second mailbox joins the
first. It is the opposite of most connectors, and worth knowing before the account picker appears.
Ask for list_accounts to see everything connected.
Note that a mailbox being connected does not let that mailbox open the connection. Only the account that originally set up a connection resolves to its set of mailboxes; anyone else signing in to Claude gets an empty list of their own. Several people can hold the same mailbox, each seeing only what they were given.
Using it
Every request names the account to act on — for example, "find invoices from Acme in the AP mailbox, then look for matching payment confirmations in the AR mailbox". Claude can search and read mail, read attachments, and search and read Drive files, and where write access has been granted it can also create Gmail drafts and create or update Drive files.
This connector cannot send email. It can save a draft for you to review, and that is all — no tool exists here that sends anything.