Open sandbox · through October
Ask a contractor's books.
A fictional contractor's complete ERP books ($28M–$95M, ten contractor types), open through October, no signup. Pick a contractor type, region and ERP, then ask what a CFO would ask: WIP, over-billing, AP aging, approvals, retainage.
Ask the books
Try one of the questions below, or ask your own. Answers come from the ERP tables through tool calls, not from memory.
Use it in your own AI
The same books are available as an MCP server. Connect it to the assistant your team already uses; the URL follows your selection above. Read-only, no login.
- In Claude (web or desktop), open Settings → Connectors.
- Click Add custom connector, name it “Contractor books sandbox”, and paste the URL. No authentication.
- In a new chat, turn the connector on and ask: “What's our over/under billing position on the WIP?”
On Team and Enterprise plans an owner may need to add the connector for the organization.
- In ChatGPT, open Settings → Apps & Connectors → Advanced and turn on Developer mode.
- Create a connector, paste the URL, and choose No authentication.
- In a new chat, pick the connector from the tools menu and ask a question about the books.
Plan requirements vary: custom MCP connectors are limited to certain paid and workspace plans, and workspace admins may need to allow them.
- In Copilot Studio, open your agent and go to Tools → Add a tool → New tool → Model Context Protocol.
- Paste the URL as the server URL, set authentication to None, and save.
- Test in the agent's chat pane, then publish to Teams or Microsoft 365 Copilot if you like.
Requires Copilot Studio (enterprise licensing). The consumer Copilot app doesn't accept custom MCP servers.
Add this to ~/.gemini/settings.json for the Gemini CLI, then run gemini and ask away:
Custom MCP support in the consumer Gemini app is limited; the CLI is the reliable path today.
Want this on your Vista? Let's talk.
Same questions, your real books. Beiing Human sits on top of your ERP and fixes AP coding and approval lag at the source.