Integrations: everything it connects to.

The rules, for all of them

• They connect from inside the app, with the integration's own button. There are no keys to ask us for and no files to edit.
• Each one asks for its own permission and touches only what this page says it does. The detail of what data each one sees is in the Privacy Policy.
• They disconnect whenever you want from the same screen, and access is cut immediately.
• Calendar, ClickUp and Slack live in the workspace, so you can have one account in your personal space and another in your work one. The ones that belong to your account — MCP, chat, two-step verification — follow you into all of them.

Calendar

Two routes: the whole calendar over OAuth, or an iCal address. You connect them from the workspace switcher → Edit workspace → Calendar.

• Google CalendarTwo-way sync: your events show up next to your tasks, and what you schedule goes back into the calendar.
• Microsoft · Outlook CalendarThe same two-way sync, over Microsoft Graph. It works for a personal account and a work one alike.
• Apple CalendarBy iCal address, and also both ways: you bring your events in, and you subscribe to your tasks from the calendar on your phone.

Tasks and documents

One syncs live; the other is a one-off move. Both are under Edit workspace → Integrations.

• ClickUpTwo-way sync: your ClickUp lists and your tasks stay identical on both sides, with nothing entered twice.
• NotionImports the pages and databases you authorize into your document tree. One-way and on demand: it never writes back to Notion.

Chat

Capturing without opening the app: you type, send a voice note or a photo from the messenger you already have open, and it lands in your daily note.

• WhatsAppText, audio and photos into your daily note. The reminders you write come back through the same chat.
• TelegramThe same bot, the same commands and the same assistant behind them. It links with a code, no phone number.
• SlackCapture from the channel, create tasks with /sb, and get the digest and the recaps where the team already works.

AI clients and automations

secondbrain publishes a remote MCP server: anything that speaks the protocol can search, read and operate your workspace with your permission. It is the integration nobody has to build one by one — if your tool speaks MCP, it is already connected.

• ClaudeA remote connector over OAuth, on the web, the desktop and the phone. There is no token to copy.
• ChatGPTYour own connector in developer mode, over OAuth as well. It needs a paid ChatGPT plan.
• Cursor, Claude Code and editorsThe ones configured with a file use a token you generate yourself and revoke whenever you want.
• Any other MCP clientThe server is published in the protocol's public registry, so clients that query it find it on their own.
• n8nIts MCP client node points at the same address with your token: that is where when this happens, write it into the daily note comes from.
• ZapierIt works the other way round: it publishes its own MCP server, so one AI client can have both switched on in the same conversation.
• MakeSame as Zapier — the bridge is the client, which talks to both servers and moves things from one to the other.

Browser

The Web Clipper is an extension: it installs from the Chrome Web Store and runs on anything that speaks Manifest V3.

• Google ChromeWhere the extension is published. ⌘⇧S opens it over the page you are reading.
• Microsoft EdgeIt installs from the same store: Edge takes Chrome extensions with nothing in between.
• BraveSame package, same store. What the extension sends is the page exactly as you are seeing it.
• ArcAlso built on Chromium, so the extension goes in just the same.

Signing in, and the second factor

You sign in with email and password or with Google, and you can add a six-digit code from the app you already use. The standard is TOTP: any of them works.

• Sign in with GoogleA button instead of a password. On the phone it opens the system browser, so the app never sees your credentials.
• Apple PasswordsKeeps the code in the keychain and autofills it. If you already use Apple's manager, there is nothing else to install.
• Google AuthenticatorScan the QR and you are done. The codes copy up to your Google account, so they survive a change of phone.
• Microsoft AuthenticatorThe same thing with a Microsoft cloud backup. It is usually the one already installed on a work phone.
• 1PasswordIf you already use a password manager, the second factor can live there, right next to the password.
• Authy and any other TOTP appThe standard is the same for all of them, and secondbrain does not know — or care — which one you picked.

Payments

We do not process cards. A third party takes the payment, and which one depends on where you bought the plan.

• PaddleMerchant of record on the web, the desktop and Android: it charges, invoices and settles the taxes. Your card number never reaches our servers.
• App StoreOn the iPhone the plan is bought inside the app and Apple takes the payment. The subscription is managed from your Apple ID settings.

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