Notion · 2026-05-13 · major
Notion 3.5 Developer Platform — Workers Runtime, External Agent API for Claude Code, Codex, Cursor, and Decagon, Plus Notion CLI and Agent SDK
Notion 3.5 turns the workspace into an orchestration layer for outside agents. Workers hosts custom code, an External Agents API plugs in Claude Code, Codex, Cursor, and Decagon, and a new CLI and Agent SDK ship alongside.
Notion 3.5 makes the workspace an orchestration layer where outside agents read, write, and run code alongside humans.
Key specs
| Workers pricing through august 2026 | free |
|---|---|
| External agent launch partners | Claude Code, Codex, Cursor, Decagon |
| Beta pieces | Database Sync, Custom Agent Tools, Webhook Triggers |
| Alpha pieces | External Agents API, Agent SDK |
What is it?
Notion's biggest developer-platform push to date. The release wraps several pieces — Workers, External Agents, Database Sync, Custom Agent Tools, Webhook Triggers, the Notion CLI, and a new Agent SDK — into a single 3.5 launch announced May 13, 2026. The pitch is 'any data, any tool, any agent' inside one Notion workspace.
How does it work?
Workers is a hosted runtime for custom code, used by Database Sync to mirror APIs like Salesforce, Zendesk, Strava, and Postgres into Notion databases, and by Custom Agent Tools to give agents deterministic, code-backed actions instead of token-burning prompts. External Agents API (alpha) lets users chat with Claude Code, Codex, Cursor, or Decagon as if they were a Notion agent, while the Agent SDK lets developers embed a Notion agent into their own apps. Webhook Triggers let external systems kick off Notion workflows, and a Notion CLI plus rebuilt developer portal round out the tooling.
Why does it matter?
Notion is moving from a productivity surface to agent infrastructure. The same launch that ships an SDK to embed Notion agents elsewhere also accepts agents from rival vendors, betting workspace pages become the orchestration layer where humans, custom code, and third-party agents share state. Workers are free through August 2026, lowering the cost of trying it.
Who is it for?
Internal tooling teams, agent-platform builders, Notion power users running cross-app workflows
Try it
npm i -g @notionhq/cli, then notion login and notion workers deploy