AI teams · A2A

Agents that call agents need their own passport.

Apinizer's A2A registry gives every agent an identity, a capability profile, and a scoped permission set. Conversations flow through the gateway with the same auth and audit as any other request.

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Agent-to-Agent (A2A) — For AI teams use case overview from Apinizer. — For AI teams · Agent-to-Agent (A2A)

The problem

Agent-to-agent traffic invented itself faster than any governance layer.

An ops agent calls a security agent. A research agent calls a planning agent. None of them have a real identity; none of the calls have an audit trail. The first time a regulator asks 'which agent did this', the org has nothing. Apinizer treats A2A as a first-class plane: identities, scopes, contracts, and a single audit ledger.

Capabilities

What Apinizer does here

Agent identities

Every agent registered with a stable identity, owner, and capability profile. OIDC-style claims; short-lived credentials; same revocation surface as a user.

A2A registry

Agents discover only the peers they're permitted to call. Discovery is mediated by the registry, not by URL guessing.

Contract-aware messaging

Each agent advertises its tools and message shapes. The gateway enforces the contract on every call — bad message in, clean error out.

Conversation audit

Every message between agents captured with both sides' identities, the contract used, and the result. Forensic timelines reconstruct agent chains end-to-end.

Scope enforcement

An agent that's allowed to call 'search' can't call 'modify'. Permission applied at the runtime; nothing depends on prompt obedience.

Same plane as MCP and APIs

A2A lives on the same gateway as API and MCP traffic. One identity surface, one audit ledger, one set of policies.

Use cases

In production, this looks like…

Banking
Istanbul bank registers 27 agents across customer-care and risk teams
Each agent has an owner, a capability profile, and a permission set. Cross-team calls go through the A2A surface, not direct webhooks.
Manufacturing
Stuttgart OEM coordinates 9 plant agents through a central planner
Planner agent discovers each plant's local agent via the registry; A2A messaging carries contracts. Plant operators see the entire chain in audit.
Telecom
Madrid carrier limits a customer-service agent to read-only billing peers
Scope enforced at the gateway. The agent can answer 'what's my balance' through a billing peer but cannot trigger a refund — different scope, different agent.
Insurance
Paris insurer audits a triage chain end-to-end
Triage agent → underwriting agent → fraud agent. The audit query joins all three legs into one timeline; the DPO traces a complaint in minutes.
Retail
Amsterdam marketplace registers partner agents alongside internal ones
Partner agents authenticate with short-lived JWTs. Marketplace agents discover them via the registry; partners never see internal agents they don't have access to.
Media
Milan publisher revokes a runaway agent in seconds
Agent identity revoked at the registry; all conversations drop on next call. No need to chase webhooks across services.
Public sector
Prague ministry routes citizen-services agents through one A2A bus
Two ministries, one citizen-services chain, one audit trail. Each ministry's agent stays in scope; cross-ministry calls go through the A2A surface explicitly.
Energy
Baku utility separates ops agents from analytics agents on the registry
Ops agents can call analytics agents; analytics cannot call ops. The boundary is enforced by the gateway, not by hopeful design.