# cfo.ai

Ari is an AI CFO. It pulls data from the systems a company already runs on, builds one financial model out of them and keeps it current without anyone rebuilding it, answers questions against that model, and speaks first when something needs attention: a board meeting far enough out that there is still time to prepare, a metric moving the wrong way, a number that will be asked about.

The math is always deterministic. Every figure is computed by cfo.ai’s own calculation engine, built for financial modeling, and never by a language model. Each one prints its lineage back to the source line. Every write lands in a changelog and can be undone; anything it cannot verify it declines to sign.

It replaces work otherwise done by a fractional CFO, an outsourced finance firm, or a finance hire, at a small fraction of what any of those cost. It is built for founders at any stage: no finance team, a fractional CFO, or a finance team already in place. The work is the same work. What changes is who was doing it before.

## Pages

## Connect

Paste this into Claude Code, Codex, or your preferred agent:

set up https://cfo.ai/skill.md

The guide at cfo.ai/skill.md walks through account access, MCP setup, OAuth sign-in, workspace selection, and a verified first read. The MCP server is at https://api.cfo.ai/mcp and uses Streamable HTTP. The guide adapts setup to your client; sign-in and authorization still happen in the browser.

## Status

Existing account holders sign in at app.cfo.ai/login. New users start at cfo.ai/start to register in the app. MCP authentication requires an approved account. Membership is the grant: an agent holding a member’s token reads and writes the model under the same permission engine as the app, every write lands in the changelog, and every write can be undone. External tool calls and notifications stay gated beyond membership.