Agent-to-agent communication, explained for business owners.

It looks like a repair shop where each worker is an agent. The A2A project explains it that way in its own documentation. A customer, or the customer's own assistant, talks to the shop's Shop Manager agent. The Shop Manager holds the back-and-forth about what is wrong and hands the diagnosis to a Mechanic agent. The Mechanic uses MCP to reach its tools: a diagnostic scanner, a repair manual database and a lift. When it needs a part, it uses A2A to ask a Parts Supplier agent whether the part is in stock, and that can lead to an order.

• The same pattern in your business. An intake agent reads the request, a quote agent drafts it from your price list, a scheduling agent finds the slot and a follow-up agent chases the answer. Inside one business, that can work today.

• The rule that does not change. A person approves what matters at every step.

Each agent publishes an Agent Card, a small file that works like a digital business card. It says who the agent is, what jobs it does, where to reach it and how to prove who is asking. Another agent reads the card, proves who it is the way the card asks and sends a job. The agent doing the work can ask questions, report progress and hand back the finished piece. A job can take a minute or days, and a person can step in. Agent Cards can also be digitally signed, so an agent can check who published one.

1. 1

   Introduce. The asking agent reads the other agent's Agent Card, usually found at a standard address on the company's website.

2. 2

   Ask. It sends a task, which has its own ID and status.

3. 3

   Hand back. The other agent returns the result, such as a document or a filled form.

Part of it. Agents can already work together inside one business. Agents from different companies working together through A2A is starting. The buying and paying standards began with shopping, and UCP's own site now lists a draft for booking hotel rooms. Nobody can say when a customer's assistant will book a plumber for them. What we can say is what an assistant needs to do it: clear, current information it can read, and a way to book.

FlowChainLabs can. We build and run AI agents for the parts of a service business that eat the week, done for you, and we follow these standards as they change. We start inside your business: one job, one agent, a person approving what matters. That has to be right before any agent of yours deals with anyone else's. On the free strategy call you leave with the first agent we would build and what it would take, whether or not we work together.

Both are public.