A2A Business Card vs. A2A Agent Card. How to prevent terminology confusion in agent-ready B2B commerce
The short answer: an A2A Business Card describes a business. An A2A Agent Card describes an operational software agent. The first is a commercial identity and qualification record; the second is a technical discovery document defined by the Agent2Agent Protocol. They can be linked, but they must not be treated as the same thing.
The word card is used for two different records in the emerging agentic economy. That similarity is convenient, but it can also create costly confusion.
A buyer, procurement agent or search system needs to know who a company is, what it supplies, where it operates, what evidence supports its claims and how an RFQ can be submitted. An A2A client, by contrast, needs to know how to connect to a software agent, which protocol interface it supports, what skills it exposes and which security requirements apply.
These are different questions, different trust boundaries and different layers of the B2B stack.
This page establishes the DirectRFQ terminology and the recommended relationship between the two cards. It is intended for business owners, procurement teams, developers, platforms, AI architects, marketplaces and publishers preparing for agent-mediated B2B commerce.
Status note — 20 July 2026: references to the technical A2A Agent Card on this page are aligned with the official Agent2Agent Protocol 1.0 documentation available on this date. The DirectRFQ A2A Business Card is an independent business-data framework; it is not an official component of the Agent2Agent Protocol.
The 30-second rule
Use this test whenever the terminology is unclear.
If the record answers “Which business is this, what can it supply and how can it receive a qualified opportunity?”, it is an A2A Business Card.
If the record answers “Which software agent is this, where is its A2A endpoint and what can the agent execute?”, it is an A2A Agent Card.
If a company has both, publish two distinct records and link them explicitly.
Memory aid: the business is the commercial subject; the agent is the technical actor.
Canonical definitions
What is an A2A Business Card?
An A2A Business Card is a structured, machine-readable and human-readable representation of a business organisation for AI-mediated discovery, qualification and commercial action.
It may describe:
the legal entity, brand and publisher;
commercial roles such as manufacturer, distributor, service provider, buyer or integrator;
products, services, technologies and production capabilities;
sectors, applications, territories and delivery constraints;
certifications, evidence, claim status and review dates;
buyer requirements and supplier qualification criteria;
Direct RFQ routes, forms, APIs, WebMCP tools or agent interfaces;
governance, data ownership and the identity of the contracting entity.
The DirectRFQ A2A Business Card can exist before the organisation deploys any autonomous agent. A manufacturer with a structured company record and a well-designed RFQ form may therefore be agent-discoverable and agent-actionable without being technically A2A-enabled.
What is an A2A Agent Card?
An A2A Agent Card is the technical metadata document defined by the official Agent2Agent Protocol. It allows a client to discover and understand an operational A2A agent or server.
In A2A Protocol 1.0, an Agent Card can identify the agent, expose supported interfaces and protocol versions, describe capabilities and skills, specify default input and output modes, declare security schemes and requirements, link to documentation and include signatures. Public discovery commonly uses the well-known path /.well-known/agent-card.json.
The Agent Card belongs to the runtime communication layer. It helps software determine whether and how to communicate with an agent. It does not, by itself, provide complete business qualification, legal due diligence, supplier evidence or authority to conclude a transaction.
For the normative technical model, consult the A2A Protocol 1.0 specification and the official Agent Discovery documentation.
The canonical comparison
| Dimension | DirectRFQ A2A Business Card | Technical A2A Agent Card |
| Primary subject | A business organisation or commercial entity | An operational A2A agent or server |
| Primary question | Who is this business, what can it do and how can it trade? | What is this agent, where is it and how can a client interact with it? |
| Specification owner | Independent DirectRFQ framework | Agent2Agent Protocol under Linux Foundation governance |
| Main purpose | Business discovery, qualification, trust and conversion | Technical agent discovery and interoperability |
| Typical audience | Buyers, procurement agents, search systems, marketplaces and sales teams | A2A clients, agent runtimes, developers and orchestration systems |
| Runtime required | No | Yes — a functioning A2A implementation is expected |
| Core identity | Legal entity, brand, publisher and contracting entity | Agent name, description, provider and version |
| Capabilities | Products, services, commercial roles, production capabilities and constraints | Agent skills, protocol capabilities and supported interfaces |
| Markets | Industries, applications, territories, customer types and exclusions | Not its primary concern |
| Evidence | Certifications, sources, claim status, validity and review dates | Optional card signatures and technical security metadata |
| Action routes | Direct RFQ, contact, API, WebMCP and optional A2A links | A2A interfaces, endpoints and supported operations |
| Security meaning | Governance, visibility, provenance and business-data controls | Authentication and authorisation requirements for protocol access |
| Commercial authority | Declared separately and bounded by policy or mandate | Not established merely by publishing the card |
| Lifecycle | Changes with business facts, offer, markets and evidence | Changes with agent version, skills, interfaces and runtime configuration |
| Can stand alone? | Yes | Technically yes, although business context may remain insufficient |
The cards are complementary when each remains authoritative for its own layer.
Why the distinction matters
Terminology is not a cosmetic issue. A system may make unsafe or commercially incorrect assumptions when business identity and software-agent identity are collapsed into one object.
1. Reachability is not business legitimacy
A valid Agent Card may show that an endpoint is available and that a client can authenticate. It does not automatically prove that the represented supplier exists, owns a claimed factory, holds a certification or is entitled to sell a regulated product.
2. Technical skill is not commercial capability
An agent skill such as “create a quotation request” describes an executable function. A business capability such as “five-axis CNC machining of titanium components to a specified tolerance” describes what an organisation can deliver. The two statements may be related, but they are not interchangeable.
3. Provider is not necessarily the contracting entity
The operator of an agent, the provider named in technical metadata, the subject business, the platform publisher and the entity that signs the contract can be different organisations. Procurement systems must not silently merge these roles.
4. Authentication is not transaction authority
Authentication can establish that a request originates from a recognised principal. It does not establish that the principal may approve a price, accept contractual terms, place an order or commit a company to a binding agreement.
5. A signature protects integrity, not the truth of every claim
An Agent Card signature can help a relying party verify the integrity and origin of the technical document. It does not independently validate every business statement made by the agent or its provider. Business claims still need provenance, evidence, status and appropriate verification.
6. Versions have different meanings
The version of an agent or Agent Card tracks software and interface changes. The version or review date of an A2A Business Card tracks changes to business identity, offer, evidence, qualification logic and commercial routes. These lifecycles should be managed independently.
Same word, different trust boundaries
The cleanest implementation treats agent-ready B2B commerce as a set of connected layers.
Business identity layer — establishes the business subject, legal identity, brands, roles, locations, ownership of claims and contracting entity.
Capability and qualification layer — describes products, services, production capabilities, constraints, certifications, markets and buyer-fit criteria.
Commercial action layer — exposes Direct RFQ routes, forms, APIs, WebMCP tools, approval steps and response expectations.
Agent interoperability layer — exposes a technical A2A Agent Card, supported interfaces, skills, authentication requirements and the operational runtime.
Transaction governance layer — defines mandate, approval thresholds, audit trails, human review, contractual controls and exception handling.
An A2A Business Card primarily covers layers 1–3 and can point to layers 4–5. An A2A Agent Card primarily covers layer 4. Neither card, on its own, replaces transaction governance.
Recommended architecture: Business identity → capability and evidence → qualified RFQ route → agent interface → governed transaction.
Field-by-field differences
Business identity vs. agent identity
The A2A Business Card should distinguish at least the subject organisation, legal name, trading names, domain, identifiers, locations, publisher and contracting entity. It answers the entity-resolution problem that precedes supplier qualification.
The A2A Agent Card identifies a software service. Its name, description, optional provider, version and supported interfaces help a client understand the operational agent. Even when the provider field points to an organisation, that field should not be treated as a substitute for a complete business identity record.
Commercial roles vs. executable skills
A business role describes how an organisation participates in a market: manufacturer, distributor, importer, integrator, buyer, laboratory or service provider.
An agent skill describes a task the software can perform: accept an RFQ, check order status, retrieve product data or request supplier documentation. A company may have a commercial capability for which no agent skill exists, and an agent may expose a workflow whose execution depends on third-party businesses.
Offer and constraints vs. input and output modes
The A2A Business Card expresses what can be supplied and under which conditions: materials, tolerances, certifications, minimum order quantities, capacity, lead-time bands, territories and exclusions.
The Agent Card expresses how the runtime exchanges information, including supported interfaces and default input/output modes. Technical content modes do not communicate the commercial feasibility of an order.
Evidence and claim status vs. technical signatures
The A2A Business Card associates material claims with sources, verification status, validity periods and review dates. A claim may be self-declared, source-backed, third-party verified, expired, disputed or unknown.
The Agent Card can carry signatures and security declarations relevant to the technical document and protocol access. These controls are valuable, but they do not perform commercial due diligence.
RFQ routes vs. protocol operations
The A2A Business Card can expose several action routes: a human form, a Direct RFQ endpoint, an email fallback, an API, WebMCP tools or a link to an A2A Agent Card. Each route should have a purpose, audience, status and policy.
The Agent Card tells an A2A client how to reach the agent and which skills or capabilities the protocol service offers. It should be linked only when the endpoint is real, maintained and tested.
Data governance vs. access security
Business-data governance covers ownership, consent, visibility, retention, update responsibility, provenance and correction procedures.
Protocol security covers how a client authenticates and gains authorised access to an agent interface. A mature system needs both.
How the two cards should be linked
The relationship should be explicit, directional and testable.
From the A2A Business Card
The Business Card may include an interface entry whose type is a2aAgentCard. That entry should point to the canonical technical Agent Card only when all of the following are true:
an operational A2A server exists;
the Agent Card is valid for the supported protocol version;
the endpoint is monitored and maintained;
security requirements are accurately declared;
the relevant business relationship is clear;
the agent’s commercial mandate is separately documented.
If these conditions are not met, publish the real interface that exists today: a Direct RFQ form, API, WebMCP tool or human contact route.
From the A2A Agent Card
The optional provider information and documentation links may point to the organisation’s official site and its canonical A2A Business Card. This gives the technical agent a richer commercial context without overloading the Agent Card with business data that belongs elsewhere.
Do not duplicate everything
Duplicating the entire business record inside every Agent Card creates stale data and conflicting sources. Keep canonical facts in their authoritative record and link across layers with stable identifiers and URLs.
One business may publish multiple Agent Cards
A company may operate separate agents for sales, procurement, logistics, service and compliance. Each operational agent can have its own Agent Card, version, skills and security policy while linking to one canonical A2A Business Card.
One platform may operate agents for multiple businesses
A marketplace, integrator or managed-service provider may operate an agent on behalf of several suppliers. The implementation must distinguish:
the agent operator;
the technical provider;
the business represented in a particular interaction;
the publisher of the business data;
the contracting entity;
the party with authority to approve or reject a transaction.
An endpoint relationship must never be used as an implicit substitute for these identities.
A practical readiness model
DirectRFQ recommends describing readiness with precise labels instead of applying “A2A” to every form of automation.
| Level | Recommended label | What is actually available | Agent Card required? |
| L1 | Human-readable | Conventional company and contact pages | No |
| L2 | Machine-readable | Structured organisation, offer and contact data | No |
| L3 | Agent-discoverable | Stable identity, capability and evidence records | No |
| L4 | Agent-actionable | Structured RFQ route, API or WebMCP action | No |
| L5 | Agent-assisted | AI supports qualification, routing or response with controls | No |
| L6 | A2A-enabled | Operational Agent2Agent endpoint and valid Agent Card | Yes |
| L7 | Agent-transactable | Governed authority, approvals, audit and transaction controls | Yes, plus governance beyond the card |
The important boundary is between L5 and L6. A chatbot, AI search function, API, form or WebMCP endpoint may be useful and agent-actionable, but it should not be described as A2A-enabled unless an operational Agent2Agent implementation exists.
Four implementation scenarios
Scenario 1: An SME without an AI agent
A specialist manufacturer publishes an A2A Business Card containing its legal identity, capabilities, materials, sectors, certifications, markets and a structured RFQ form.
The company is agent-discoverable and agent-actionable. It does not publish an Agent Card because no A2A server exists. This is a correct and valuable implementation, not an incomplete one.
Scenario 2: A business with one sales agent
A distributor publishes one A2A Business Card and operates a sales-qualification agent. The Business Card links to the sales agent’s Agent Card. The technical card exposes skills such as product matching and RFQ intake.
The agent may prepare an opportunity, but a declared approval policy determines when a human must confirm pricing or contractual terms.
Scenario 3: One company with specialised agents
An industrial group operates separate agents for supplier onboarding, sales RFQs, compliance-document retrieval and shipment status.
The company maintains one canonical business identity record and several Agent Cards. Each agent has a bounded purpose, separate skills, security requirements and version history. The Business Card exposes only the interfaces relevant to the current business context.
Scenario 4: A platform representing multiple suppliers
A marketplace operates a procurement-facing agent that can route RFQs to several verified suppliers.
The Agent Card identifies the platform-operated agent. Each supplier has its own A2A Business Card. Every quotation or transaction preserves the supplier identity, evidence, contracting entity and the platform’s intermediary role. The system does not imply that the platform owns each supplier’s capabilities.
Dangerous anti-patterns
Calling a company profile an “Agent Card”
An About Us page, directory listing or JSON-LD organisation record is not an Agent Card unless it follows the technical A2A specification and describes an operational agent.
Publishing a dummy Agent Card
A static JSON file pointing to a nonexistent, untested or abandoned endpoint creates false readiness. Publish the Business Card first and add the Agent Card when the runtime is production-ready.
Treating a chatbot as proof of A2A support
A chatbot can use proprietary APIs and still have no Agent2Agent compatibility. The correct description is based on the implemented interface, not on the presence of conversational AI.
Mixing company and agent identifiers
Legal entity identifiers, tax numbers, registration numbers and domain ownership belong to the business identity layer. Agent IDs, endpoint URLs and software versions belong to the technical layer. Use explicit references between them.
Inferring commercial authority from connectivity
The ability to reach an agent does not mean the agent can bind a company. Declare permissions, thresholds, approval requirements and prohibited actions separately.
Treating the provider field as due diligence
Provider metadata can help identify the organisation associated with an agent. It is not a complete supplier record and should not replace verification of legal identity, ownership, certifications or commercial standing.
Publishing secrets in either card
Both cards may be publicly discoverable. Do not include API keys, private credentials, confidential pricing, internal routing logic, personal data without a lawful basis or details that create avoidable security exposure.
Claiming official protocol status for the DirectRFQ framework
The DirectRFQ A2A Business Card complements the Agent2Agent ecosystem but is independently defined. It must not be presented as an official Agent2Agent Protocol component, extension or certification.
Recommended terminology for DirectRFQ publishers
| Use this term | Use it when | Avoid saying |
| DirectRFQ A2A Business Card | Referring to the structured business identity and qualification record | Official A2A business standard |
| A2A Agent Card | Referring to the technical discovery document defined by the Agent2Agent Protocol | Company Agent Card |
| Agent-discoverable business | Business data can be found and interpreted by agents | A2A-enabled, unless L6 is met |
| Agent-actionable business | An agent can invoke a structured RFQ or other bounded action | Autonomous company |
| A2A-enabled business | The business exposes or uses an operational A2A agent with a valid Agent Card | A2A-ready based only on a chatbot or form |
| Agent-transactable business | Agents can execute governed commercial steps within an explicit mandate | Fully autonomous trading, unless authority truly exists |
| Agent operator | The entity running the technical agent | Contracting supplier, unless it is the same entity |
| Represented business | The organisation whose offer or demand is being represented | Provider, when the roles differ |
Capitalisation should remain consistent: A2A Business Card for the DirectRFQ category and A2A Agent Card for the technical protocol record. On first use, add “DirectRFQ” or “technical” when the audience may not know the distinction.
Publication and implementation rules
Rule 1: Name the subject explicitly
Every card should state whether its subject is an organisation or a software agent. Do not rely on the reader to infer this from the URL or page design.
Rule 2: Preserve canonical ownership
The business controls its authoritative business facts. The agent operator controls runtime metadata. When a third party publishes either record, provenance and delegation should be visible.
Rule 3: Link by stable identifiers
Use canonical URLs and persistent identifiers. Avoid copying mutable facts across multiple cards when a link to the authoritative record is sufficient.
Rule 4: Declare status, not aspiration
Publish only interfaces that work. Use status values such as active, beta, restricted, deprecated or unavailable. A roadmap item is not a production capability.
Rule 5: Separate authority from capability
State what the agent can technically do and what it is authorised to do. A quotation-generation skill does not necessarily include permission to issue a binding offer.
Rule 6: Test the relationship continuously
Monitor Agent Card availability, endpoint health, authentication configuration, supported protocol versions and the validity of links from the Business Card.
Rule 7: Review business claims independently
Set review dates for company data, certifications, capability claims, locations, ownership and commercial routes. Runtime uptime does not make stale business data accurate.
Decision tree: which card do you need?
Do you need to describe a company, supplier, buyer or commercial capability? Publish an A2A Business Card.
Do you operate a live Agent2Agent-compatible server? Publish a technical A2A Agent Card.
Do you expose only a form, API or WebMCP tool? Link that interface from the Business Card and use “agent-actionable,” not “A2A-enabled.”
Do you operate several agents for one company? Publish one canonical Business Card and a separate Agent Card for each operational agent.
Does one agent represent several businesses? Maintain separate Business Cards and disclose the operator, represented business and contracting entity in each interaction.
Can the agent approve commercial commitments? Document the mandate, limits, approval path and audit controls outside the Agent Card.
Pre-publication checklist
Before publishing an A2A Business Card:
Is the subject organisation unambiguous?
Are the legal entity, brand, publisher and contracting entity separated?
Are commercial roles, capabilities, constraints and markets structured?
Do material claims have evidence, status and review dates?
Are RFQ routes real, purpose-specific and monitored?
Is an a2aAgentCard link included only when a functioning A2A server exists?
Are personal, confidential and security-sensitive data excluded or properly controlled?
Before publishing an A2A Agent Card:
Does it conform to the current supported A2A Protocol version?
Do all declared interfaces and skills exist in production?
Are security schemes and requirements accurate?
Is the provider/operator relationship clear?
Does documentation explain the business context and limits of authority?
Is the card available at the declared discovery location?
Are versioning, monitoring, incident response and deprecation procedures in place?
Before linking the cards:
Do both records use canonical URLs?
Is the relationship between business, provider, operator and agent explicit?
Can an automated check verify that the link is live and reciprocal where appropriate?
Is duplicated information minimised?
Are commercial mandate and human-approval requirements documented?
Frequently asked questions
Is an A2A Business Card part of the official Agent2Agent Protocol?
No. The DirectRFQ A2A Business Card is an independent framework for business identity, capability, qualification, trust and commercial action. It is designed to complement technical agent protocols, including A2A, without claiming official protocol status.
Is an A2A Agent Card a digital business card for a company?
No. In the Agent2Agent Protocol, the Agent Card is a technical metadata document for an operational agent or A2A server.
Can a company publish an A2A Business Card without an AI agent?
Yes. This is one of its central benefits. A business can become machine-readable, agent-discoverable and ready for structured RFQs before deploying an autonomous agent.
Can an A2A agent exist without an A2A Business Card?
Technically, yes. A valid Agent Card can describe and expose the agent. However, a procurement or sales workflow may still lack the structured business identity, offer, evidence and contracting context required for a confident commercial decision.
Is a website chatbot an A2A agent?
Not necessarily. The chatbot may use a proprietary interface or internal workflow. It should be described as A2A-enabled only when it implements the relevant Agent2Agent requirements and publishes a valid Agent Card.
Is WebMCP the same as A2A?
No. WebMCP can make website functions available to agents through structured tools. A2A is a protocol for agent-to-agent interoperability. A Business Card may link to either or both, but the interface type must be identified correctly.
Does an Agent Card signature verify the supplier?
Not by itself. A signature can support integrity and provenance of the technical card. Supplier identity, certifications, capability claims and commercial standing require their own evidence and verification processes.
Does the provider named in an Agent Card become the contracting party?
No. The provider, agent operator, represented business and contracting entity may be different. The contracting party must be declared through the appropriate business and transaction records.
Can one A2A Business Card link to several Agent Cards?
Yes. A company may operate specialised agents for sales, procurement, compliance, logistics or support. Each should have a clear scope and its own technical lifecycle.
Can several businesses share one agent?
Yes, particularly on marketplaces and managed platforms. The agent must preserve tenant separation and make the represented business, data source, authority and contracting entity clear for every relevant action.
Which card should search engines index?
Both may be public, but they serve different discovery needs. The A2A Business Card should be the primary indexable business and category record. The Agent Card should remain a canonical technical discovery document linked from relevant documentation and business interfaces.
Which card should contain prices?
Usually neither should expose confidential or volatile negotiated pricing as static public metadata. The Business Card can describe commercial models, currencies, price indications or qualification rules when appropriate. Actual prices should be returned through governed quotation or transaction workflows.
A compact policy statement for websites and documentation
The following wording can be reused by organisations implementing both records:
Terminology policy: Our A2A Business Card describes the organisation, its commercial capabilities, evidence and RFQ routes. Any linked A2A Agent Card describes an operational software agent and its technical interfaces under the Agent2Agent Protocol. Publishing an Agent Card does not by itself verify business claims or grant the agent authority to enter into binding transactions.
The DirectRFQ position
The market needs more than protocol connectivity. Agents also need reliable business identity, structured commercial capabilities, evidence, qualification logic and safe routes to action.
The technical A2A Agent Card answers how agents find and communicate with an agent. The DirectRFQ A2A Business Card answers how people and machines understand, qualify and engage a business.
Keeping these records separate produces a stronger architecture:
fewer false assumptions about identity and authority;
clearer responsibility for data and runtime operations;
easier versioning and verification;
better supplier discovery and qualification;
safer transitions from search to RFQ to transaction;
a practical adoption path for businesses that do not yet operate agents.
The goal is not to force every company to become an autonomous agent. The goal is to make every suitable business legible, trustworthy and actionable in a market increasingly mediated by machines.
Next step
DirectRFQ helps B2B companies structure their business identity, capabilities, evidence and RFQ routes for human buyers, search systems and AI agents.
Request an A2A Business Card assessment to determine your current readiness level, identify missing data and design the shortest credible path from machine-readable presence to governed agentic commerce.
Publication metadata
Recommended URL: /a2a-business-card-vs-a2a-agent-card/
Meta title: A2A Business Card vs. A2A Agent Card | DirectRFQ
Meta description: Learn the difference between an A2A Business Card and a technical A2A Agent Card—and how to link them safely for agent-ready B2B commerce.
Primary keyword: A2A Business Card vs A2A Agent Card
Supporting keywords: A2A Agent Card, Agent2Agent Protocol, agentic commerce, B2B AI agents, Direct RFQ, agent discovery, machine-readable business identity
Suggested page type: Category comparison and terminology guide
Suggested structured data: TechArticle, DefinedTerm, FAQPage where search-engine eligibility requirements are met, BreadcrumbList and Organization
Canonical owner: DirectRFQ.com
Editorial status: Category-defining terminology page
References
Agent2Agent Protocol 1.0 specification
A2A Agent Discovery documentation
DirectRFQ A2A Business Card Specification v0.1