.0n App Marketplace MCP server
Browse, install, and execute .0n apps + first-party 0nCore products. Unified catalog of UCP products and marketplace apps with plan-aware install + Stripe checkout.. Hosted by 0n3: 5 endpoints your AI can call with your own .0n App Marketplace account, from Claude, ChatGPT, Cursor, Claude Code, Codex or Gemini CLI. One sign-in, one key per AI, a receipt for every call.
5 endpoints5 categoriesauth: bearer_or_sessionhosted
What your AI can do with .0n App Marketplace
List apps · Browse the unified catalog (UCP products + apps)2
GET /api/widgets/marketplace/catalogGET /api/marketplace/my-appsInstall app · Install a free app for the current location1
POST /api/widgets/marketplace/installCheckout app · Stripe checkout for a paid app1
POST /api/widgets/marketplace/checkoutExecute app · Execute an installed .0n app1
POST /api/marketplace/execute/{appId}List installed · List apps installed on the current location0
Install in three steps
- Create a free account at 0n3.app and connect .0n App Marketplace: paste a key or sign in through a door. It lands in your vault, encrypted.
- Open 0n3.app/install, pick your AI. A key is made for that AI alone; copy the line it gives you.
- Ask your AI: whoami. It answers with your connected services. Then ask it to list apps in .0n App Marketplace.
claude mcp add --transport http --scope user 0n3 https://0n3.app/mcp --header "Authorization: Bearer <your 0n token>"
Connect .0n App Marketplace to
Questions
What can an AI do with the .0n App Marketplace MCP server?
5 things: list apps, install app, checkout app, execute app and more. Every call runs with your own .0n App Marketplace connection and lands on a receipt.
Do I need to run anything on my computer?
No. 0n3 is hosted. Connect .0n App Marketplace once, install 0n3 into your AI with one line, done.
Where does my .0n App Marketplace key go?
Into your 0n3 vault, encrypted, one record per connection. The AI never sees it.