0n3
MCP servers · commerce

UCP — Universal Commerce Protocol MCP server

Universal commerce: discover, list, and check out any product/app/download from the unified 0n catalog. One protocol, every store.. Hosted by 0n3: 3 endpoints your AI can call with your own UCP — Universal Commerce Protocol account, from Claude, ChatGPT, Cursor, Claude Code, Codex or Gemini CLI. One sign-in, one key per AI, a receipt for every call.

Connect UCP — Universal Commerce ProtocolInstall into your AIWatch it work

3 endpoints4 categoriesauth: bearer_or_sessionhosted

What your AI can do with 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

Install in three steps

  1. Create a free account at 0n3.app and connect UCP — Universal Commerce Protocol: paste a key or sign in through a door. It lands in your vault, encrypted.
  2. Open 0n3.app/install, pick your AI. A key is made for that AI alone; copy the line it gives you.
  3. Ask your AI: whoami. It answers with your connected services. Then ask it to list offers in UCP — Universal Commerce Protocol.
Install (user scope — every project)
claude mcp add --transport http --scope user 0n3 https://0n3.app/mcp --header "Authorization: Bearer <your 0n token>"

Connect UCP — Universal Commerce Protocol to

Claude Code + UCP — Universal Commerce ProtocolMCP server + skillClaude (desktop & claude.ai) + UCP — Universal Commerce ProtocolconnectorChatGPT + UCP — Universal Commerce Protocolconnector · GPT actionCodex CLI + UCP — Universal Commerce ProtocolMCP serverGemini CLI + UCP — Universal Commerce ProtocolMCP serverCursor + UCP — Universal Commerce ProtocolMCP serverVS Code (Copilot) + UCP — Universal Commerce ProtocolMCP serverWindsurf + UCP — Universal Commerce ProtocolMCP server

More commerce MCP servers

eBay25 endpointsCardFlow8 endpoints

Questions

What can an AI do with the UCP — Universal Commerce Protocol MCP server?

3 things: list offers, create checkout, get download link, list purchases. Every call runs with your own UCP — Universal Commerce Protocol connection and lands on a receipt.

Do I need to run anything on my computer?

No. 0n3 is hosted. Connect UCP — Universal Commerce Protocol once, install 0n3 into your AI with one line, done.

Where does my UCP — Universal Commerce Protocol key go?

Into your 0n3 vault, encrypted, one record per connection. The AI never sees it.