MCP servers · .0n App Marketplace · connector
Connect Claude (desktop & claude.ai) to .0n App Marketplace
One line gives Claude (desktop & claude.ai) your .0n App Marketplace account as tools: 5 endpoints, list apps, install app, checkout app, called with your own connection. No key in the prompt, a receipt for every call, revoke Claude (desktop & claude.ai)'s access alone any time.
Three steps
- Create a free 0n3 account and connect .0n App Marketplace. Paste a key or sign in; it lands in your vault, encrypted.
- Install 0n3 into Claude (desktop & claude.ai). Add 0n3 as a custom connector; sign in once through the 0n door.
- Ask Claude (desktop & claude.ai): whoami. Then: "List apps in .0n App Marketplace".
Claude desktop app and claude.ai
- Settings → Connectors → Add custom connector
- Name: 0n3 · URL: https://0n3.app/mcp
- Click Connect and sign in with your 0n account (email + password, or paste your 0n token)
- Turn the connector on in a chat and ask: "whoami"
This is the OAuth door: no token to paste, revoke it any time from 0n3 → Tokens.
The line above carries a placeholder; 0n3.app/install mints a real key named for Claude (desktop & claude.ai) and fills it in.
What Claude (desktop & claude.ai) can then do in .0n App Marketplace
List apps · Browse the unified catalog (UCP products + apps)2
List apps
GET /api/widgets/marketplace/catalogList installed
GET /api/marketplace/my-appsInstall app · Install a free app for the current location1
Install app
POST /api/widgets/marketplace/installCheckout app · Stripe checkout for a paid app1
Checkout app
POST /api/widgets/marketplace/checkoutExecute app · Execute an installed .0n app1
Run an app
POST /api/marketplace/execute/{appId}List installed · List apps installed on the current location0
List apps installed on the current location
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