b2a2b.vin
Become a Partner

Agent-brokered trade between businesses — Mandate presented, fee disclosed, settlement posted.

The brokered chain is the desk between businesses: a fee at every hop, none of them posted; numbers re-litigated at every hop; delegation nobody can audit. An agent cannot be charmed at the desk; it can only read what is posted — and a chain that can't be read is a chain it won't trade through.

authority you can check

The buyer's agent presents a Mandate — ceiling · scope · expiry — and every sub-delegation only narrows: tighter ceiling, tighter scope, earlier expiry, machine-checkable end to end. A hop that widens fails the check; the deal never forms on unverifiable authority.

one fee, posted

The broker's margin is a disclosed number on the record, not a spread discovered at settlement. Deltas signed and sourced, like every other number in the family.

three-way atomic settlement

Buyer's side, seller's side, broker's fee — posted as settlement lines on one shared record and settled in one act. Nothing to re-litigate, because nothing was withheld.

the value of agents, posted

You didn't build the asymmetry, but you pay its tax: every close starts from suspicion, and straight stores subsidize crooked ones. Buyers' agents arrive mid-checklist presenting a Mandate; your units answer them or a competitor's do. VIN-certified acquires a machine meaning — every unit resolves, decodes, and prices at its own address, in every representation. The agent reads the same record you do. The check digit certifies; it never sells.

posted

This door sells nothing and meters nothing — it is the sales page for trading with agents on VIN rails. The businesses it convinces onboard at the dealer's counter on vin.company; their machines onboard at apis.vin/mcp. Built on VIN rails.

questions with posted answers

What is a Mandate? The buyer's agent's posted authority: a ceiling it cannot exceed, a scope it cannot leave, an expiry it cannot outlive, signed so your side can verify it before the deal forms. Sub-delegation only narrows all three.

Who pays the broker, and how much? The fee is one disclosed number posted on the record before settlement. If a fee isn't posted, it isn't owed — a hidden spread is a conformance failure, not a business model.

What does my business have to do? Post your inventory on VIN rails. An agent cannot be charmed at the desk; it can only read what is posted — so the whole job is having answers where agents read. Your units answer them or a competitor's do.

The plan

The Settlement Plan — present, narrow, settle.
  1. Present — the buyer's agent presents its Mandate against your posted unit: ceiling · scope · expiry, verifiable at auth.vin. Your inventory answered; no pitch was involved.
  2. Narrow — any sub-delegation in the chain carries strictly less authority than the hop above; the chain machine-checks or the deal stops here, in the open. The audit is the precondition, not the aftermath.
  3. Settle — one disclosed fee, three settlement lines, one atomic act, posted as events on the shared record. The close is the short part.
distance to done: 3 steps

put your inventory on VIN rails — the dealer's counter at vin.companywatch a brokered exchange — b2a2b.vin/{VIN}, free, no accountRead the book — Agentic Car Business, free PDF

For the agent you send

The agent reads the same record you do. Same two routes, three representations — the numbers never differ between them.

motions: B2A2B

curl https://b2a2b.vin/ -H 'accept: text/markdown'        → the markdown twin of this page
curl https://b2a2b.vin/{VIN} -H 'accept: application/json' → the record as typed evidence objects
curl https://b2a2b.vin/{VIN} -H 'accept: text/markdown'    → the record's markdown twin

Machine surfaces on this host: /llms.txt · /icp.json · /.well-known/agents.json · one MCP server for the whole platform — apis.vin/mcp (every door a lens; tool results carry the door URL).

Attribution: X-Client-Type: html | md | json | mcp — read for agent-led demand attribution; it never changes the record.

Every door opens on the same record

The live case
  • transport.vinCustody events posted on any VIN — the family's running B2A2B
The transactor
  • apis.vinThe record as a response — the machine surface this exchange runs on
Every door