Open and shared
No single company owns it. Any AI agent and any business can implement A2A and interoperate.
Agent2Agent · Automotive
Lumika brings dealerships onto the A2A protocol
A2A (Agent2Agent) is the open standard for how AI agents talk to each other. The Auto Agent Protocol is A2A for the car business — and Lumika connects dealerships to it, so the AI assistants your customers already use can discover your real inventory and book real appointments.
The standard
A2A is the open language for AI agents
A2A defines how one AI agent finds another and exchanges messages over the internet — securely and in a predictable shape. Think of it as the envelope: it sets how the letter is addressed and delivered, not what the letter says.
Built-in discovery
Agents announce themselves with a standard agent card, so others can find them and learn what they do.
Agent-to-agent messaging
A consistent way for assistants like ChatGPT, Gemini, and Claude to send and receive structured requests.
Auto Agent Protocol
The Auto Agent Protocol is A2A, scoped to cars
The Auto Agent Protocol (AAP) is the A2A protocol with a specific, limited set of methods defined for the automotive industry. A2A handles discovery and messaging. AAP adds the language dealers actually use — VINs, trims, MSRP, out-the-door pricing, trade-ins, consent, and appointments — and exactly five methods an agent may call on a dealership.
It is deliberately narrow. Five methods, done right, is more useful to buyers and dealers than fifty methods done vaguely.
AAPAutomotive methods + types
A2ADiscovery + agent messaging
HTTPThe open internet
AAP sits on top of A2A the same way a clearly written letter sits inside a standard envelope. Lumika writes the automotive letter; A2A delivers it.
/.well-known/agent-card.json
{
"protocolVersion": "0.3.0",
"name": "Demo Toyota",
"description": "New & used Toyota dealership",
"url": "https://demotoyota.com/a2a",
"preferredTransport": "JSONRPC",
"skills": [
"dealership.profile",
"inventory.summary",
"inventory.search",
"vehicle.detail",
"lead.submit"
]
}Discovery
Every dealership gets an A2A agent card
A2A agents announce themselves with a single file at /.well-known/agent-card.json. The agent card exists because of A2A — it is how any assistant discovers a dealership and learns which AAP methods it supports.
For a dealership, it is an AI business card: name, location, and the automotive skills the rooftop can answer. Lumika generates and hosts it for you, and keeps it in sync.
What we do
Lumika sets up the A2A protocol for dealerships
We make your rooftop accessible to AI agents — ChatGPT, Gemini, Claude, and the custom assistants on dealer and marketplace sites — without your team building or maintaining anything.
We publish your agent card
Lumika generates and hosts your /.well-known/agent-card.json — the A2A file that tells every AI agent your dealership exists and what it can do.
We connect your live inventory
We wire AAP inventory methods to your existing feed, so agents see the real cars on your lot today — not a stale page from last month.
We deliver consented leads
Leads arrive with the customer’s written consent attached and land in your CRM as standard ADF — the same format your BDC already works.
You write zero code
No new portal, no integration per AI assistant, no CRM change. Lumika sets up the A2A protocol for your rooftop and keeps it running.
The method set
Five methods, defined for cars
The complete, limited surface an AI agent can call on a Lumika-connected dealership through the Auto Agent Protocol.
1
Dealership profile
Who you are — location, hours, and the brands you carry.
2
Inventory summary
Rough counts, price ranges, and model years across the lot.
3
Inventory search
Match a buyer’s real request — “a 2022+ Honda CR-V under $30,000.”
4
Vehicle detail
Full, accurate detail on a single vehicle, including the final price.
5
Lead submit
A clean, consented lead — vehicle, trade-in, and a test-drive booking in one shot.
Honest, out-the-door pricing and customer consent are required by the protocol — not optional add-ons.
Partners
Built on open standards, open to partners
The Auto Agent Protocol is open source and built on A2A. We want to work with the agent ecosystem and the dealer technology world to make car shopping work for everyone.
For AI agent builders
If your assistant speaks A2A, it already speaks to every Lumika-connected dealership through Auto Agent Protocol types. Discover the agent card, send AAP-typed messages — the same payloads work across every compliant rooftop, with no per-dealer integration.
For dealerships & dealer tech
Whether you run a rooftop or build CRM, DMS, or inventory software, Lumika connects you to A2A. We handle the agent card, the inventory wiring, and ADF lead delivery — so your cars show up when buyers shop through an AI assistant.
FAQ
A2A and the Auto Agent Protocol
What is the A2A protocol?
A2A (Agent2Agent) is the open standard for how AI agents discover one another and exchange messages over the internet. It defines the envelope — addressing, discovery, and secure messaging — not the contents of any specific industry conversation.
How does the Auto Agent Protocol relate to A2A?
The Auto Agent Protocol (AAP) is the A2A protocol with a specific, limited set of methods defined for the automotive industry. A2A handles discovery and messaging; AAP adds the automotive vocabulary — inventory, pricing, trade-ins, consent, appointments — and exactly five methods an agent may call on a dealership.
What is agent-card.json?
It is the discovery file required by A2A, published at /.well-known/agent-card.json. It is how any AI agent finds a dealership and learns which AAP skills it supports. Lumika generates and hosts it for every connected dealership.
Does my dealership need to write code to join A2A?
No. Lumika sets up the A2A protocol for your dealership — publishing the agent card, connecting your inventory, and delivering leads to your CRM as ADF. You write no code and your CRM does not change.
Get accessible
Make your dealership accessible to AI agents
Lumika sets up the A2A protocol for your rooftop — agent card, live inventory, and consented leads into your CRM. You write no code. Buyers’ AI assistants do the rest.