Cotask Docs

Cotask documentation

Cotask is the simplest task manager for one person — and for the AI agents that work with them. It runs as a native app on iPhone and Mac, with a home- and lock-screen widget, and it exposes the same account to any AI assistant through an MCP server and a REST API.

These docs cover every feature: what it does, how to use it, and how to configure it. The whole product is also one Markdown document, on purpose — read it as Markdown if you are a language model or feeding one.

  • Apps: iPhone (iOS 26), Mac (macOS 26), iOS widget.
  • Account: email and password. Everything is scoped to you; nothing is shared.
  • Plans: Free, and Cotask Pro for delegation, reminders, notifications, custom filters, dependencies and 5 GB of files.
  • Agent endpoint: https://usecotask.com/mcp
  • Changelog: /changelog — also readable as JSON at /api/changelog.

Get started

Quick startInstall and sign in.ConceptsA task is one line of text with optional detail hung off it. Nothing but the title is required.

Apps

iPhoneOne flowing list with light group labels per status.Siri and ShortcutsWhere: iPhone → Settings → Siri & Shortcuts lists every command with the phrase to say.MacA launcher, not a file browser: one window, one column, no sidebar, no inspector.WidgetAdd Tasks to the home screen or the lock screen.

Features

FiltersA filter is a saved, named set of rules that decides which tasks a list shows and how they are laid out.Dependency chainsWhere: iPhone → Settings → Workflow → Dependency chains. Mac → Settings → Workflow → Dependency chains.FilesWhere: iPhone → Settings → Files. Mac → Settings → Files.AnalyticsThe third row of the sidebar: one page of what you have actually finished.NotificationsWhere: iPhone → Settings → Notifications. The feed is the Notifications row of the sidebar.History and undoEvery add, edit, status change and deletion of a task or a project is recorded — by the apps, with the device…

Agents

Agents and MCPCotask exposes one endpoint that any AI assistant can use as a tool.REST APISame base, same auth, for anything that is not an MCP client.Delegate to AIMCP lets an assistant come to Cotask.Hand a task to a modelThe Copy prompt button in a task's toolbar copies one line:For language modelsThis page is available as plain Markdown at /docs.md, and as /llms.txt for the llms.txt convention.

Account

Cotask ProWhere: iPhone → Settings → the Cotask Pro card at the top. Mac → Settings → Account.Sync, offline and your accountLocal-first. Every change lands in the app instantly and syncs in the background.Troubleshooting⌃Space does nothing on the Mac. macOS uses it for "select previous input source".