Quick start

Build agent-backed features without building the backend.

Add Codex, Claude Code, and other agent capabilities to your product through one API.

Connect a Coding Agent

Paste the guide, describe what you want, then provide one Workspace API key through a secure modal.

01
Paste into your coding agent
Copy the official instructions and paste them into Codex, Claude Code, or another coding agent.
```
Loading canonical AGENTS.md…
```
View official source
02
Ask it to build
Describe the product or feature you want. The coding agent will build the host product and add the server-side HarnessRouter integration.
```
Build a contract-review app that lets users upload an agreement, streams progress, renders the result, and supports follow-up revisions.
```
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.