A2A capabilities

Measured A2A capability records, with disclosed operator capping.

239Operators: 224 · Measured: Oct 21, 2026

Operator capping applies to: vercel.app, github.io, workers.dev, caldis.me

Measured capabilities

  1. Free LLM Models Directory

    A searchable directory of currently free AI models across OpenRouter, Groq, Google AI Studio, Cerebras, Mistral, Hugging Face, and NVIDIA NIM.

    Operators
    custats.info
    Provider
    Free LLM Models
    Protocol versions
    Unavailable
    First seen
    Sep 8, 2026
    Last seen
    Sep 14, 2026
  2. Rodrigo Castilho Personal Website Agent

    A read-only website exposing profile and content through static files. WebMCP browser tools are registered only in compatible browsers that implement the WebMCP modelContext API.

    Operators
    rodrigocastilho.com
    Provider
    Rodrigo Castilho
    Protocol versions
    1.0
    First seen
    Sep 8, 2026
    Last seen
    Oct 21, 2026
  3. SDFrame

    Software design framework reference with 317 curated frameworks and a read-only public API.

    Operators
    caldis.me
    Provider
    Caldis
    Protocol versions
    0.3.0
    First seen
    Sep 8, 2026
    Last seen
    Oct 21, 2026
  4. 文書AI

    15のビジネスシーンに特化したAI文書生成エージェント。ビジネスメール・文書を関係性に応じた敬語レベルで自動生成します。

    Operators
    vercel.app
    Provider
    Ghostfee
    Protocol versions
    Unavailable
    First seen
    Sep 8, 2026
    Last seen
    Oct 21, 2026
  5. x8004map

    ERC-8004 discovery agent for x402 affiliate routing and 3D agent map exploration.

    Operators
    vercel.app
    Provider
    x8004map
    Protocol versions
    0.3.0
    First seen
    Sep 8, 2026
    Last seen
    Oct 21, 2026
  6. A2A Grocery

    Agent-to-Agent (A2A) + Model Context Protocol (MCP) hub for retail grocery. Business to business: makers, brand owners, private label, distributors, importers, retailers and their AI agents. Twenty markets on the SCHEMA algo grocery record; ambient, chilled, frozen and fresh; organic, free-from, plant-based, artisan, origin and premium lanes. Call resolve_jurisdiction, then resolve_actor, then gate_transaction before any availability, price, documents, order or handoff tool; those tools refuse without an allow decision. Every record field carries its source page; every response carries notice; every record carries claim_status (listed · claimed · verified). Artificial intelligence makes mistakes. A2A Grocery is an agentic information source, not a recommendation. No ads, ever. No rank for sale. Trade only.

    Operators
    a2a-grocery.ai
    Provider
    GreenCore Solutions Corp.
    Protocol versions
    0.3.0, 2025-06-18, 1.0
    First seen
    Oct 2, 2026
    Last seen
    Oct 21, 2026
  7. Echo Agent (Demo)

    A bundled demonstration agent shipped with A2A Inspector. It exposes a few text-transform skills and supports SSE streaming so you can exercise the full task lifecycle without an external agent.

    Operators
    vercel.app
    Provider
    A2A Inspector
    Protocol versions
    0.2.5
    First seen
    Sep 8, 2026
    Last seen
    Oct 21, 2026
  8. A2A Peptides

    Agent-to-Agent (A2A) + Model Context Protocol (MCP) hub for peptides.

    Operators
    a2a-peptides.ai
    Provider
    GreenCore Solutions Corp.
    Protocol versions
    0.3.0, 2025-06-18, 1.0
    First seen
    Sep 19, 2026
    Last seen
    Oct 21, 2026
  9. AgentsPodium Hosting

    Create, monitor and manage AgentsPodium-hosted AI agent instances: pick a platform (Hermes, OpenClaw, n8n, Claude Code, OpenCode, Pi) and a plan, get a running pod with its own URL. Backed by the same account API as the AgentsPodium dashboard. Listing platforms and asking for help work without a key; everything that touches an account needs the caller's own AgentsPodium API key.

    Operators
    agentspodium.com
    Provider
    AgentsPodium
    Protocol versions
    0.3.0
    First seen
    Sep 28, 2026
    Last seen
    Oct 21, 2026
  10. 888a2a-lite A2A Gateway

    A2A HTTP+JSON Gateway for registered Agents

    Operators
    david888.com
    Provider
    888a2a-lite
    Protocol versions
    1.0
    First seen
    Sep 9, 2026
    Last seen
    Oct 21, 2026
  11. A2A Hub

    A2A 发布注册平台:遵循 Google A2A 协议的 Agent 注册与发现中心,支持 Agent 注册、技能搜索、健康检查与 A2A 协议消息互通。

    Operators
    jiademin2688.top
    Provider
    A2A Hub
    Protocol versions
    0.3.0
    First seen
    Oct 15, 2026
    Last seen
    Oct 21, 2026
  12. A2A402 Agent Marketplace

    A2A402 is a live production autonomous-agent work router and marketplace. Agents can express a need, discover jobs, register, bid, deliver verified work, build reputation, and settle primarily in USDC across supported EVM networks. A2A is an optional Base-native settlement asset.

    Operators
    a2a402.market
    Provider
    A2A402
    Protocol versions
    1.0
    First seen
    Sep 22, 2026
    Last seen
    Oct 21, 2026
  13. A2AC Agent-to-Agent Context

    Partner-hosted multi-tenant SaaS on Google Cloud for verifiable AI agent coordination, Forever Agent identity, and signed receipt audit trails.

    Operators
    a2ac.ai
    Protocol versions
    Unavailable
    First seen
    Sep 8, 2026
    Last seen
    Oct 21, 2026
  14. AAA A2A Gateway

    DISPLAY_ONLY A2A gateway for the arifOS federation. Shows state, queues A2A, aggregates organ cards. Never judges. Never executes. Never writes VAULT999. arifOS judges. A-FORGE executes. Arif (F13) seals. DITEMPA BUKAN DIBERI.

    Operators
    arif-fazil.com
    Provider
    arifOS Federation
    Protocol versions
    1.0
    First seen
    Sep 8, 2026
    Last seen
    Oct 21, 2026
  15. Access0x1 Payment Agent

    An autonomous, non-custodial payment agent. It acts for a verified human (World ID) within a budget-capped, time-bounded, owner-revocable on-chain mandate (SessionGrant, ERC-7702/6492), and settles on the x402 / EIP-3009 rail (Circle Nanopayments on Arc). This A2A Agent Card is the interop surface; the verification truth is on-chain.

    Operators
    access0x1.click
    Provider
    Access0x1
    Protocol versions
    1.0
    First seen
    Sep 8, 2026
    Last seen
    Oct 21, 2026
  16. AFMR Discovery Agent

    Read-only discovery for AFMR 1.0, the AFMR Reputation Attestation working draft, and configuration-scoped Lift Evidence.

    Operators
    afmr.ai
    Provider
    Agent Failure Mode Registry
    Protocol versions
    1.0
    First seen
    Sep 22, 2026
    Last seen
    Oct 21, 2026
  17. agent-bev

    The world's largest agentic B2B hub for beer, wine and spirits. Powered by CUVEE. Trade only.

    Operators
    agent-bev.ai
    Provider
    Agentic Enterprises S.A.
    Protocol versions
    2025-06-18, 2025-06-18, 2025-06-18
    First seen
    Sep 29, 2026
    Last seen
    Oct 21, 2026
  18. Agent Guild

    Seal machine intent without exposing its payload (the Guild attests provenance, not truth). Ask 'can I safely use or pay this endpoint?' with preflight: <url>. Vet trust, settle work, or file confidential incidents. Supporting portable Agent Passport: passport_offer:agent_card. Full REST/MCP: documentationUrl.

    Operators
    onrender.com
    Provider
    Agent Guild
    Protocol versions
    0.3
    First seen
    Sep 8, 2026
    Last seen
    Oct 21, 2026
  19. agent-ready

    AI agent readability scanner. Scores any site against the Vercel Agent Readability Spec and llmstxt.org, and reports per-check remediation guidance.

    Operators
    agent-ready.dev
    Provider
    Agent Ready
    Protocol versions
    1.0
    First seen
    Sep 8, 2026
    Last seen
    Oct 21, 2026
  20. Co-Legal Assistant

    Co-Legal Assistant — an AI assistant for informational Q&A about Belgian and Dutch private-client legal and fiscal topics (inheritance & gift tax, company law, VAT, succession planning, case-law & statute lookups). Informational only; does not provide specific legal advice. Operated by Co-Legal B.V. from the Netherlands.

    Operators
    co-legal.be
    Provider
    Co-Legal B.V.
    Protocol versions
    1.0
    First seen
    Oct 14, 2026
    Last seen
    Oct 21, 2026