Free, open-source, local-first GHG accounting for the desktop. Import your bills, let the AI extract the activity data, and produce an ISO 14064-1 inventory report — entirely on your own machine. No account, no cloud, no subscription.

Licensed under the MIT License. Runs fully offline; your data never leaves your device.

Grab the latest macOS / Windows build from the releases page — or visit carbonink.xyz. No activation key required.

• Inventory — emission sources, activity data, and pinned emission factors with audit-grade calculation snapshots (Scope 1 / 2 / 3).
• AI extraction — pull activity data from utility bills, fuel receipts, freight, travel, and purchase documents (bring your own LLM API key).
• Questionnaires — fill customer/rating-agency disclosure forms from your inventory (outbound), and collect supplier Scope 3 Cat 1 data (inbound).
• Reports — one-click ISO 14064-1 inventory report (PDF).
• MCP — exposes your inventory to Claude / Cursor / Pi via a built-in MCP server.

pnpm workspace; the desktop app lives in desktop/.

pnpm install
pnpm --filter carbonink dev      # run the Electron app
pnpm --filter carbonink test     # vitest
pnpm --filter carbonink build    # production build (electron-builder)

See AGENTS.md for repo conventions and docs/ for the design specs, plans, and roadmap.

(cloud/worker/ — the old license/payments API — is retired; see its README.)