HarnessRouter
Sign up

Example router · Cursor

Build a Cursor app in three steps.

Start building my own AI app now

Three steps

From empty project to runnable agent app.

  1. 01

    Paste AGENTS.md into your coding agent

    Copy the official instructions and paste them into Codex, Claude Code, or another coding agent.

    View official source
    Loading canonical AGENTS.md…

    Paste into your coding agent

    Paste AGENTS.md into Codex, Claude Code, Cursor, or another coding agent.

  2. 02

    Ask it to build

    Describe the product or feature you want. The coding agent will build the product interface and connect your backend to server-side agents through HarnessRouter.

    Build a , + your product requirementsFinish copy AGENTS.md to unlock
  3. 03

    Add your API key securely

    When the coding agent opens a secure secret modal, create a Workspace API key and paste it into that modal. The agent stores it as HR_API_KEY and continues the build.

    Create API Key

    Paste the key only into the secure modal opened by your coding agent. Never paste it into normal chat, source files, AGENTS.md, browser code, logs, or screenshots.

Result

You just built a Cursor that belongs to you in 7-10 minutes.

You can start selling it to your users.