OpenVC MCP server.

In Claude: Customize > Connectors > Add custom connector > https://mcp.openvc.app/mcp. Under Authentication choose "Sign in when needed": investor search works right away, and Claude asks you to sign in to OpenVC when you want your own data. If you added OpenVC with "No sign-in", remove it and add it again.
In Claude Code in a terminal: claude mcp add --transport http openvc https://mcp.openvc.app/mcp, then /mcp, then openvc, then Authenticate, then start a new session.