The end-to-end billing protocol

Kill the invoice.

Firms capture and sign the work. It becomes a verifiable envelope. The client checks every line and the bill settles itself — end to end, on a loop.

The protocol · running live Bills auto-settled  128,940
Firm · captures
work in progress
Signed
Client · verifies
reconstructing
Verified
Bill · settles
awaiting match
Settled
In production this runs continuously across both tenants — the same code path. This preview streams live with real timestamps.
Four surfaces, one loop

Capture. Envelope. Verify. Settle.

The protocol is four product surfaces that hand off to each other — the firm captures and signs, the settlement layer seals it, the client verifies, the bill clears. Here is each one.

01 · Capture

Automatic time capture. Kill the time entry.

Firms capture billable work as it happens and sign it at submission — no timesheets, no Friday reconstruction. The bill is evidence the moment it leaves the firm.

Pyx Firm · live captureLive
Draft Article 4 — revisions1.4 hrs
Partner review & markup0.9 hrs
Finalize & circulate0.7 hrs
Accrued · no manual entry$1,410
Signed at submission ✓
02 · The envelope

Every bill becomes a signed envelope.

On the open settlement layer the invoice becomes content-addressed, signed, and anchored to a public root — verifiable by anyone, alterable by no one. It transmits both ways.

Envelope · content-addressed
bafy·re7q·9f3c·21a8·d0e4·77bc
Signed · Ed25519
Anchored · public root
Transmitting →  ·  both tenants
03 · Verify

The client checks every line against its own systems.

The envelope arrives and each line is reconstructed and matched against the client's own calendars, documents, and engagement terms. No trust required — the evidence agrees, or it doesn't.

Aurora Capital · verify
Timekeeper on file
Rate matches engagement letter
Hours match calendar + documents
Envelope signature valid
04 · Settle

The bill settles itself.

Signed work meets its verification and the bill clears — zero manual entry, zero reconciliation, zero-day payment cycle. The invoice, as a thing you argue over, is dead.

Auto-settled
$1,410 cleared
0-day payment cycle
0 disputes · 0 reconciliation · 0 chase
Watch it run

See the whole round-trip settle itself, end to end.

Why it holds

Signed at submission. Verified on receipt. Deterministic all the way down.

Deterministic

No AI in the settlement path.

The same evidence produces the same result — for the firm defending the line and the client checking it.

Buyer-side

Runs on each side's own systems.

No one has to trust the other's numbers. Neither side depends on the other to reconcile.

Signed & anchored

Verifiable by anyone.

Every bill is a content-addressed, signed envelope anchored to a public root — alterable by no one.

Patent-pending

Seven provisional filings.

Filed with the USPTO on how the work is captured, sealed, and settled across tenants.

Watch it run on your bills.

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