0n3
MCP servers · UCP — Universal Commerce Protocol · connector

Connect Claude (desktop & claude.ai) to UCP — Universal Commerce Protocol

One line gives Claude (desktop & claude.ai) your UCP — Universal Commerce Protocol account as tools: 3 endpoints, list offers, create checkout, get download link, 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.

Get the line for Claude (desktop & claude.ai)Connect UCP — Universal Commerce Protocol first

Three steps

  1. Create a free 0n3 account and connect UCP — Universal Commerce Protocol. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into Claude (desktop & claude.ai). Add 0n3 as a custom connector; sign in once through the 0n door.
  3. Ask Claude (desktop & claude.ai): whoami. Then: "List offers in UCP — Universal Commerce Protocol".
Claude desktop app and claude.ai
  1. Settings → Connectors → Add custom connector
  2. Name: 0n3 · URL: https://0n3.app/mcp
  3. Click Connect and sign in with your 0n account (email + password, or paste your 0n token)
  4. 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 UCP — Universal Commerce Protocol

List offers · List all active products, downloads, and plans1
List offersGET /api/commerce/offers
Create checkout · Generate a Stripe Checkout session for a product slug1
Create a checkoutPOST /api/commerce/checkout
Get download link · Verify entitlement and return a signed download URL1
Get a download linkGET /api/commerce/download
List purchases · List the user's completed purchases0
List the user's completed purchases

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