AccountHub MCP ServerVerifiedFeatured

What is AccountHub

AccountHub is a hosted MCP server that lets ChatGPT, Claude and Claude Code work across every account you use for work — not just one.

Connect several Google accounts (Gmail, Google Calendar, Google Drive, Google Contacts), several Slack workspaces and Notion once on accounthub.ai, then add one MCP endpoint to your AI assistant. Search, list and read tools fan out across every connected account by default; pass an account label to scope a call to one.

What you can do

• Search mail and Slack across all accounts in one call, read Gmail threads and Slack channels/threads, and forward, draft or send (Gmail) and post, schedule or react (Slack).
• List, create, update and respond to Google Calendar events and check free/busy across calendars.
• Search Google Drive files and read their content (Drive access is read-only: AccountHub cannot create, edit or delete files); search and list Google Contacts.
• Search and read Notion pages.
• Keep a cross-assistant shared memory: what you decided in ChatGPT is visible in Claude and Claude Code (add_memory / get_memory_digest / search_memory).
• Set up recurring message alerts.

68 tools. Every tool carries MCP annotations (readOnlyHint / destructiveHint), so clients can ask for confirmation before anything is sent, changed or deleted.

Authentication

• OAuth 2.1 (PKCE S256, Client ID Metadata Documents) — ChatGPT, claude.ai and Claude Code can connect with their default OAuth setting. Each person gets a token bound to their own account.
• For clients without OAuth sign-in, a personal connect URL can be issued on accounthub.ai (revocable any time).

Not supported: Outlook / Microsoft 365.

Pricing

Free — there is no paid plan.

Google OAuth app verified by Google. Privacy policy: https://accounthub.ai/privacy