Breakpoint Engine

MCP connectors

One tool surface for agents — local Docker stdio or cloud Streamable HTTP. Precise OPM computation as a companion to Cursor, Claude, ChatGPT, and your own valuation libraries.

New here? Start with the full walkthrough on Get started, or jump to a step-by-step client guide: ChatGPT, Claude, Cursor & VS Code.

Built for agentic valuation

Agents explore and query the capital structure, pause at breakpoints, mutate assumptions mid-valuation, and compare branches — without Breakpoint Engine ever holding your cap table or issuing an opinion.

  • Explore & query — securities, breakpoints, claims, allocations, txn log as structured frames the agent can reason over.
  • Pause & mutate — opm_scenario_begin stops after schedule build; step tranche-by-tranche; mutate prefs, participation, warrants, assumptions; auto-rewind and replay from a safe checkpoint.
  • Branch & diff — name branches, compare allocations and strikes, commit a completed txn or abort without custody.
  • Batch when you want speed — opm_forwardsolve / opm_backsolve for full runs with work estimates and live progress.

Local (Docker stdio)

Unmetered. Private. Clone and build from GitHub, then:

{
  "mcpServers": {
    "breakpointengine": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "breakpointengine/opm-mcp:local"]
    }
  }
}
  • Cursor — project .cursor/mcp.json
  • Claude Code — claude mcp add … docker run …
  • VS Code Copilot MCP — .vscode/mcp.json
  • Claude Desktop — claude_desktop_config.json

Cloud (Streamable HTTP)

URL: https://cloud.breakpointengine.com/mcp. Sign in, buy credits on account, then connect with Auth0 OAuth (no client ID/secret — hosts self-register):

{
  "mcpServers": {
    "breakpointengine-cloud": {
      "url": "https://cloud.breakpointengine.com/mcp"
    }
  }
}
  • Cursor — paste the JSON above; reload MCP; click Connect and finish Auth0.
  • VS Code — .vscode/mcp.json with "type": "http" and the same URL (1.101+).
  • Claude Code — claude mcp add --transport http --scope user breakpointengine-cloud https://cloud.breakpointengine.com/mcp then /mcp.
  • ChatGPT — Developer mode → custom connector → URL + OAuth.
  • Claude.ai — Settings → Connectors → custom connector → same URL + OAuth.

Cloud always: opm_estimate → authorize max_work → execute. Packs: Round / Portfolio / Practice.

Tool surface

Identical locally and in cloud. Money and rates as decimal strings — never binary floats.

opm_estimate opm_forwardsolve opm_backsolve opm_explain_breakpoints opm_cancel opm_schema opm_scenario_begin / step / query opm_scenario_mutate / rewind / branch opm_scenario_diff / commit / abort

Full descriptions on the tool reference; input format on cap table format.