Get started

Path A

Local — clone, build, Cursor

Unmetered. Cap tables stay on your machine. Best for private exploration, library integration, and agent development against the open engine.

1. Clone the public engine:

   git clone https://github.com/breakpointengine/breakpointengine.git
   cd breakpointengine

2. Build the local MCP image (Docker required):

   docker compose build opm-mcp
   # or: docker build --target mcp -t breakpointengine/opm-mcp:local .

3. Add MCP in Cursor — project .cursor/mcp.json or Cursor Settings → MCP:

   {
     "mcpServers": {
       "breakpointengine": {
         "command": "docker",
         "args": ["run", "-i", "--rm", "breakpointengine/opm-mcp:local"]
       }
     }
   }

4. Reload MCP, then ask your agent to call opm_schema and read opm://schema/cap_table.
5. First solve: opm_estimate → opm_forwardsolve. For interactive design: opm_scenario_begin → step / query / mutate → commit.

Also works with Claude Code, VS Code Copilot MCP, and Claude Desktop (stdio). Full matrix in the engine repository under docs/mcp-install.md.

Path B

Cloud — account + connectors

Metered work units. Same tools as local. Auth0 sign-in, Stripe Checkout for packs, then Cursor HTTP MCP or ChatGPT / Claude.ai connectors.

1. Sign in and create your account (Auth0).
2. Buy a pack on pricing — Round (founders), Portfolio (VCs), or Practice (valuation firms).
3. Connect your agent (same URL, Auth0 OAuth — leave client ID/secret blank where offered):
   • Cursor — paste into .cursor/mcp.json, reload, click Connect:

     {
       "mcpServers": {
         "breakpointengine-cloud": {
           "url": "https://cloud.breakpointengine.com/mcp"
         }
       }
     }

   • VS Code — .vscode/mcp.json with "type": "http" and the same URL (VS Code 1.101+).
   • Claude Code:

     claude mcp add --transport http --scope user breakpointengine-cloud https://cloud.breakpointengine.com/mcp

     Then /mcp to finish OAuth.
   • ChatGPT / Claude.ai — add a custom MCP connector with URL https://cloud.breakpointengine.com/mcp, complete OAuth, enable the connector in chat.
4. Always opm_estimate first, then set max_work. Insufficient credits → buy another pack on account.