0n3
MCP servers · 0n App Builder · MCP server

Connect Codex CLI to 0n App Builder

One line gives Codex CLI your 0n App Builder account as tools: 3 endpoints, generate app, publish app, execute app, called with your own connection. No key in the prompt, a receipt for every call, revoke Codex CLI's access alone any time.

Get the line for Codex CLIConnect 0n App Builder first

Three steps

  1. Create a free 0n3 account and connect 0n App Builder. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into Codex CLI. OpenAI's terminal agent reads 0n3 over Streamable HTTP with a token from your environment.
  3. Ask Codex CLI: whoami. Then: "Generate an app in 0n App Builder".
Put the token in your environment
export ON3_TOKEN="<your 0n token>"

Add it to your shell profile so Codex finds it next time.

The line above carries a placeholder; 0n3.app/install mints a real key named for Codex CLI and fills it in.

What Codex CLI can then do in 0n App Builder

Generate app · Build a complete .0n app from a description1
Generate an appPOST /api/app-builder/generate
Publish app · Publish a generated app to the marketplace1
Publish an appPOST /api/marketplace/publish
Execute app · Execute an installed .0n app for a location1
Run an appPOST /api/marketplace/execute/{appId}

0n App Builder in other AI clients

Claude Code + 0n App BuilderMCP server + skillClaude (desktop & claude.ai) + 0n App BuilderconnectorChatGPT + 0n App Builderconnector · GPT actionGemini CLI + 0n App BuilderMCP serverCursor + 0n App BuilderMCP serverVS Code (Copilot) + 0n App BuilderMCP serverWindsurf + 0n App BuilderMCP server

Codex CLI with other apps

Hostinger363 endpointsTelegram132 endpointsPipedrive95 endpointsResend67 endpointsSquare57 endpointsLinkedIn50 endpointsSlack45 endpointsFigma32 endpointsCloudConvert32 endpointseBay25 endpointsQuickBooks21 endpointsCloudflare21 endpoints