For companies wanting their service inside ChatGPT; the SDK is free, but apps weren't offered to UK users at launch and current status is unclear.

Kenning's take

What it does

The Apps SDK lets developers build apps that appear inside ChatGPT chats with their own interface, such as maps, playlists or slide decks, and that users can call by name or that ChatGPT suggests. It builds on the Model Context Protocol (MCP), so developers define tools on an MCP server and can add UI, log users into their own service and offer checkout. OpenAI launched it in preview in October 2025 with partners like Canva, Spotify and Booking.com; its developer documentation now sits under ChatGPT Plugins, which bundle MCP servers, skills and optional UI for ChatGPT and Codex.

• Apps with interactive UI inside ChatGPT chats
• Built on the open Model Context Protocol
• Users log in to the developer's own service
• Checkout API for selling in ChatGPT
• Developer Mode for testing and a submission process

Who it suits. Developers and companies who want their service to work inside ChatGPT.

Key facts

Category

Developer tools

Part of

ChatGPT

Made by

OpenAI

Released

6 October 2025

How to get it

free developer documentation and open-source SDK; test with Developer Mode in ChatGPT, then submit apps for review

Works on

ChatGPT, MCP

Free plan

open-source SDK, no fee stated

FAQ

Facts from the maker's own pages and the sources listed. Checked 2026-10-11.