Starbase MCP

Connect your Starbase OS CRM to Claude. Once connected, you can ask Claude to look up contacts, tag leads, and read your forms, straight from your own Starbase account.

Works in Claude Desktop, Claude Code, and any other MCP client.

Quick start

Run this in your terminal:

npx -y github:EgmerMarketing/starbase-mcp login

Then:

1. Type your Starbase email and press Enter. We email you a sign-in link.

2. Open the email (from Starbase / Supabase). Copy the "Sign In" link:

   • On a computer: right-click the Sign In button and choose Copy link.

   • On a phone: press and hold the Sign In button, then tap Copy link.

3. Paste the link back into the terminal and press Enter.

No password, no developer tools. That signs you in.

If you use Claude Desktop, setup connects itself automatically. Just fully quit and reopen Claude Desktop (not only close the window), then try asking: "List my Starbase contacts."

If you use Claude Code, run one more command:

claude mcp add starbase -- npx -y github:EgmerMarketing/starbase-mcp

That's the whole setup. Your session refreshes itself from then on, so you should never have to sign in again.

Heads up on the email: Starbase's sign-in emails currently go through a shared sender that's rate-limited, so the email can be slow or, if a lot of people sign in at once, occasionally not arrive. If it doesn't show up in a few minutes (check spam first), wait a bit and run login again, or use the token method in Troubleshooting below.

Related MCP server: HubSpot MCP Server

Tools

All tools are prefixed starbase_ and operate only on your own account. The server scopes every request to your user id and Starbase's row-level security enforces it server-side.

Troubleshooting

Check your setup any time:

npx github:EgmerMarketing/starbase-mcp doctor

• No email in your inbox? Check spam first. The shared sender is rate-limited, so it can be slow. Wait a few minutes and run login again, or use the token method below.

• "That link didn't work"? Sign-in links are single-use and expire quickly. Run login again to get a fresh one, and paste it soon after it arrives.

• "No Starbase refresh token found" — run the login command above.

• Need to reset? Credentials live in ~/.starbase-mcp/ (created with 600 permissions). Delete that folder and run login again.

Advanced: sign in with a token instead of email

If the email is being slow, you can sign in instantly with a session token:

npx -y github:EgmerMarketing/starbase-mcp login --token "<your sb-...-auth-token value>"

Get the value from your browser at starbaseos.com under DevTools ▸ Application ▸ Local Storage ▸ the key ending in -auth-token. You can paste the whole value.

How it works

Starbase signs in with Google, so there's no API key to copy. The login command uses Starbase's email sign-in link to create a dedicated session for this MCP server, separate from your browser. It then exchanges that for short-lived access tokens automatically and rotates them in the background, persisting state to ~/.starbase-mcp/. Your user id is read from the token itself, so every person who installs this uses their own login and sees only their own data.

Built by Egmer Marketing. MIT licensed.