Keynote MCP support is here, and it extends to Pages and Numbers too. Outside AI agents can now read and edit documents inside all three apps on macOS 27 Golden Gate, which Apple announced on October 27, 2026 alongside the Apple Creator Studio update.
The details come from Apple’s Apple Creator Studio announcement. Keynote also gets a new open file format called Keynote Interchange Format (.keyx), which is built so external tools and agents can read a presentation without reverse engineering it.
Keynote MCP Support Lets Outside AI Agents Edit All Three iWork Apps
Model Context Protocol is the open standard Anthropic introduced for connecting AI models to apps and data. I first covered Apple’s groundwork for it when Apple’s betas laid the MCP groundwork for agentic AI in 2025. Now it is an announced feature in the iWork apps.
With MCP turned on, an external agent can do three things inside Keynote, Pages, and Numbers:
- Read the content of a document.
- Make edits to it.
- Run automated actions directly in the app.
The requirement is macOS 27 Golden Gate, so this is a Mac feature for now. Apple’s own assistants in the three apps are a separate thing. Those run on Apple-built models and OpenAI, while MCP is the door for whatever agent or tool you already use.
Keynote Interchange Format Is a JSON Bundle Built for Tools and Agents
A standard Keynote file is a zip archive holding your media plus Snappy-compressed Protobuf files (.iwa) that carry the text and structure. Developers who wanted to script Keynote files have had to reverse-engineer that layout, and their parsers have broken when Keynote changed internal names between versions.
The new format is a JSON-based bundle designed to be readable and accessible to external tools, developer workflows, and AI agents. Plain JSON can be diffed, searched and generated by a script, which is exactly what a binary bundle makes hard. Only Keynote gets the new format. Pages and Numbers get MCP, but no matching interchange format was announced.
The New Assistants Are Beta and Limited to US English
Both features land next to the new assistants in Keynote, Pages, and Numbers, which understand the context of the document you have open. They need an Apple Intelligence-capable device on iOS 27, iPadOS 27 or macOS 27, and they are in beta with US English only. The full list of what shipped is in my Apple Creator Studio update breakdown.
Creating and editing presentations in Keynote on the App Store does not need a subscription, but the intelligence features do. Apple Creator Studio costs $12.99 per month or $129 per year after a one-month free trial, and the update is free for existing subscribers in November.
