Agent Infrastructure & Agentic Commerce › Agent-to-Agent Interoperability

Agent-to-Agent Interoperability

AE-100.20 Level 2 API Evangelist extension API Evangelist extension, CC BY-NC-SA 25 providers 35 API surfaces 8 rated strong or better

Agents discovering and delegating work to other agents.

Agent-to-Agent Interoperability (AE-100.20) is a level-2 business capability under Agent Infrastructure & Agentic Commerce in the API Evangelist extension model. The catalog holds 35 API surface(s) from 25 provider(s) that can perform some part of it, 8 of them rated strong or better. Reach is the vendor surface that lands on this capability — it is not a claim about what any particular organisation has deployed.

Where this capability definition comes from. This capability is part of the API Evangelist extension to the business-capability model, written by API Evangelist and licensed CC BY-NC-SA 4.0. API Evangelist capability extension — https://apievangelist.com Audience: agentb2b It extends, and never modifies, Turbo EA Capabilities by Vincent Verdet (CC BY 4.0). · Extension provenance and licence

Sub-capabilities

Agent Discovery & Registry AE-100.20.10API Evangelist extension, CC BY-NC-SA

agentb2b

Listing and finding agents and their cards.

no catalog coverage

Multi-Agent Orchestration AE-100.20.20API Evangelist extension, CC BY-NC-SA

agentb2b

Coordinating several agents on one task.

no catalog coverage

Agent Runtime & Memory AE-100.20.30API Evangelist extension, CC BY-NC-SA

agentb2b

Hosting agent loops and their state.

no catalog coverage

Providers that reach this capability

Ordered by rating band. Reach means a provider publishes an API surface that can perform some part of this capability — it is not a claim that any particular organisation has deployed it.

Exemplar 3 Complete, well-documented, and agent-ready
SCVD General StoreA2a1 API74.1Hive Civilizationa2a1 API72.7Match It Upagent-contracts1 API69.8
Strong 5 Solid coverage with minor gaps
Live Direct MarketingAgent Card1 API64.8AiriaAgentCard1 API61.2brick.blueAgentsRegistryTasks3 APIs60.3Atomadic TechAgents1 API58.7temp.mdAgents1 API54.4
Developing 14 Usable, with meaningful gaps to close
Green HelixMarketplace1 API53.9Blazing Bullet Private Limited[beta] A2A Agents[beta] Agents2 APIs51.6AgentMeshTasks1 API51.5Meta Agent ToolsA2a1 API51.21F916A2a1 API50.6SkyfireDirectory1 API50.6LettaGroups1 API49.9APIClaw[beta] A2A Agentsa2a2 APIs49.5Hergert SynthoraDiscovery1 API48.4AGNTCYAgents1 API47.8Infinite Audiencea2a1 API47.1Archestra AIAgent DelegationsOutbound A2A Agents2 APIs44.1Agnoa2a1 API41.9A2A402BidsContractsDeliveriesJobs5 APIs41.5
Thin 2 Limited public surface area
TESSA Marketing & TechnologyExtensions1 API36.7University of Amsterdam[beta] A2A Agentsa2a2 APIs36.4
Emerging 1 Early or largely undocumented
PrimitiveRegistries1 API21.8
This page carries no rating. Capabilities are not rated. A capability is a description of what a business does, not a thing a company publishes, so a Kin Score would have nothing to measure.
The edge table is a Pro feature. This page shows which providers and tags reach Agent-to-Agent Interoperability. The underlying tag → capability edges — each with the quoted fragment of the provider's own OpenAPI that evidences it, a calibrated confidence score, and the contract-provenance gate it passed — are available through the API, along with company-level capability maps. Only edges at confidence ≥ 0.7 with evidence found verbatim in the source contract are published at all.

See plans →  ·  How the edges are graded →