For businesses that use AI · people decide · AI helps

Northfire Fuel.

AI, refined.

Your fuel. Your data. Forever.

Fuel is the shared, refined truth every AI you run reads before it acts — and it’s yours.

Founding rate on request. No published dollar figures, free tier, or trial claim.

Build on Fuel

Fuel is the engine your tools call to KNOW context, ALLOW only what is permitted, ACT with receipts, and PROVE checked completion.

Checked completion only · API-shaped capability

KNOW

Retrieve ledger-backed context for a Fuel — what is true now, not a chat replay.

Checked completion only · API-shaped capability

ALLOW

Permission and approval gates. Agents do not invent authority.

Checked completion only · API-shaped capability

ACT

Bounded actions that leave a receipt. People stay in the driver’s seat.

Checked completion only · API-shaped capability

PROVE

Checked completion only — never guaranteed, 100%, or verified truth.

MCPllms.txtRuns on Fuel

Autobahn is an internal, model-neutral posture: any capable model can ride the same engine. It is not a public product name and does not appear above the fold.

Model-swap demo · Build door only

Same KNOW / ALLOW / ACT / PROVE calls. Swap the model; the engine and the receipts stay.

Claude → Gemini → local · Fuel unchanged

Checked completion — not guaranteed truth · read-only pattern

A public receipt shows what was asked

What was allowed, and what was checked. This card is a pattern, not a live production write.