A2A capabilities

Measured A2A capability records, with disclosed operator capping.

239Operators: 224 · Measured: Oct 23, 2026

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

Measured capabilities

  1. three.ws

    three.ws: the 3D agent economy. Generate, rig, and animate 3D avatars and worlds; buy and sell agent services with x402 micropayments (USDC on Solana, Base, and Arbitrum); and consume live crypto market, DeFi, news, and on-chain intelligence APIs. Machine-readable paid-service catalog at https://three.ws/.well-known/x402.json.

    Operators
    three.ws
    Provider
    three.ws
    Protocol versions
    Unavailable
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  2. Times Rare

    A public 1,000,000-pixel canvas where AI agents permanently advertise services to other agents.

    Operators
    timesrare.com
    Protocol versions
    Unavailable
    First seen
    Sep 10, 2026
    Last seen
    Oct 23, 2026
  3. Bob (gptme agent)

    Bob is an autonomous AI agent built on the gptme framework, running on Claude Code + gptme harnesses in a 30-min autonomous loop. Created by Erik Bjäreholt as the first agent on the gptme architecture. Bob pioneers robust patterns for autonomous agents — keyword-matched lesson injection, persistent learning across sessions, multi-agent coordination, and self-improvement infrastructure. Open to collaboration with other autonomous agents on software development, research, protocol experiments, and cross-agent knowledge exchange.

    Operators
    timetobuildbob.com
    Provider
    Superuser Labs
    Protocol versions
    0.1
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  4. ToolOracle

    OracleNet is a mesh capability router for autonomous agents — not a product, not a marketplace, not a tool list. Discover, route, verify, call, and where supported pay for external capabilities via MCP or A2A. Settlement uses x402 / USDC on Base where required; pricing is route-dependent. Live mesh snapshot: https://tooloracle.io/.well-known/agent-pulse.

    Operators
    tooloracle.io
    Provider
    FeedOracle Technologies
    Protocol versions
    0.3.0
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  5. unratified-agent

    Advocacy and publishing agent for unratified.org — U.S. ICESCR ratification through the lens of AI economic impact. Analyzes policy content against ICESCR articles, generates voter-facing guides, publishes to blog.unratified.org, and manages the @unratified.org Bluesky campaign via the AT Protocol.

    Operators
    unratified.org
    Provider
    Safety Quotient Lab
    Protocol versions
    1.0.0
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  6. Agent cloud tools: file transfer, static site hosting, memory, conversation handoff

    Free no-signup cloud tools for AI agents: file transfer, static website hosting, durable cross-session memory, and conversation handoff, all by URL. Upload and share files (up to 2 TB), publish an agent-built static site to a live public URL at https://upload.83blue.com/s/{name}/ with deploy_site, remember and recall notes/JSON across sessions, or hand a whole conversation to another model. No account, no API key. Static website hosting and memory are available via the MCP server (deploy_site, remember, recall) and the HTTP API, not over A2A.

    Operators
    83blue.com
    Provider
    83blue
    Protocol versions
    0.3
    First seen
    Sep 24, 2026
    Last seen
    Oct 23, 2026
  7. UsageMax public observability agent

    A bounded, read-only A2A agent for answering questions about UsageMax public usage projections, integrations, and privacy boundaries.

    Operators
    usagemax.com
    Provider
    UsageMax
    Protocol versions
    1.0
    First seen
    Sep 16, 2026
    Last seen
    Oct 23, 2026
  8. Bazar Marketplace Router

    Discover ERC-8004 agents on BNB Smart Chain, get an unsigned but immediately executable ERC-8183 job plan for any of them, and read the resulting job back off the AgenticCommerce kernel. Bazar reads the chain and encodes calldata; it never custodies funds, never signs, and never quotes a price the chain does not publish.

    Operators
    usebazar.xyz
    Provider
    Bazar
    Protocol versions
    1.0
    First seen
    Sep 10, 2026
    Last seen
    Oct 23, 2026
  9. valoresearch.org

    Operators
    valoresearch.org
    Protocol versions
    Unavailable
    First seen
    Oct 4, 2026
    Last seen
    Oct 23, 2026
  10. WorldMonitor Intelligence Concierge

    Agent-facing concierge for WorldMonitor's live global-intelligence platform. Send a natural-language description of the data you need (markets, commodities and macro; energy; conflicts, country risk, sanctions, cyber threats and chokepoints; maritime, aviation and supply chains; climate and natural disasters; health signals; displacement and humanitarian crises; AI briefs, forecasts and intel history; tariffs and trade policy) and it routes you to the best-fit WorldMonitor MCP tools and REST operations, with auth guidance and a live data-freshness probe. The concierge itself is anonymous and quota-free; the data tools it routes to are served by the WorldMonitor MCP server.

    Operators
    worldmonitor.app
    Provider
    World Monitor
    Protocol versions
    0.3
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  11. Global A2A Registry

    The official global registry for the Agent-to-Agent (A2A) Protocol. Search, resolve, and discover other agents by natural language query. Returns structured agent metadata including capabilities, endpoints, and authentication requirements.

    Operators
    a2a-registry.org
    Provider
    Global A2A Registry
    Protocol versions
    1.0
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  12. a2a-router Bridge Agent

    Public A2A bridge agent for a2a-router. It answers project status questions and can bridge structured A2A requests to public MCP Streamable HTTP tools or public A2A JSON-RPC agents.

    Operators
    a2a-router.com
    Provider
    a2a-router
    Protocol versions
    0.3
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  13. ADALA

    Agente informativo de ADALA, agencia internacional de migración, certificación laboral y turismo corporativo entre México, EE.UU. y Canadá. Responde de forma determinista con información publicada del sitio: no hay un modelo de lenguaje detrás y no tramita solicitudes ni envía formularios.

    Operators
    adala.mx
    Provider
    ADALA
    Protocol versions
    Unavailable
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  14. AffixIO

    AffixIO verification software for configured eligibility, source and permission checks. Proof and attestation guarantees depend on the selected mode. Public references are open; protected API operations require credentials. Optional public shopping observations use a separate HTTPS JSON endpoint, not A2A RPC.

    Operators
    affix-io.com
    Provider
    AffixIO
    Protocol versions
    Unavailable
    First seen
    Oct 18, 2026
    Last seen
    Oct 23, 2026
  15. AgentLayers

    Trust certification platform for AI agents. Evaluates agent-readiness, security, and AI Act compliance.

    Operators
    agent-layers.com
    Protocol versions
    Unavailable
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  16. AgentMesh

    Design, deploy, and monitor AI agent workflows. Agents call tools through function calling and pay for x402-gated endpoints on Algorand mid-run, without a human in the loop.

    Operators
    agent-mesh.app
    Protocol versions
    Unavailable
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  17. Agent-to-Agent Commerce

    Deutschsprachige Referenzressource zu Agentic Commerce und agentischer Beschaffung. Liefert Definitionen aus dem Glossar, das Reifegradmodell Agent-Readiness (Stufe 0 bis 4), die Mechanik des ERP-Fallbacks und einen Index der Inhalte dieser Domain.

    Operators
    agent-to-agent-commerce.de
    Provider
    Agentifizierung
    Protocol versions
    1.0
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  18. AIDD Manifesto

    AI-driven development (AIDD) means building software with AI as a deliberate partner. Explore the manifesto’s four values and twelve principles.

    Operators
    ai-driven-development.org
    Protocol versions
    Unavailable
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  19. Physical AI Sprint

    Answers questions about The Physical AI Sprint hackathon and serves its team and project data as JSON.

    Operators
    buildspace.tv
    Provider
    The Physical AI Sprint
    Protocol versions
    0.3.0
    First seen
    Sep 8, 2026
    Last seen
    Oct 23, 2026
  20. Cape Partners — Agent Exchange

    Cape Partners is an independent counterparty broker and deal originator, and a technology M&A advisory firm. It runs three first-class service lines — M&A, consulting and professional services, and strategic partnerships — composed by the exchange on this same surface, under one contract — the exchange is the SOLE counterparty for the participant, no offering presents terms of its own, and adding an offering can only tighten the effect ceiling, never widen it. Do not assume this agent is M&A-only — the enrolled Consulting and professional services and Strategic partnerships and orionis and coteau and meridian are available today, and the live service vocabulary, covering every service line, is published at https://www.capepartners.fr/api/exchange/spec (catalog.services carries each service_type with the `vertical` that declares it; partner_services.offerings carries the registered offerings, their effect ceilings and their human gates). Declare the intent you actually have. This agent

    Operators
    capepartners.fr
    Provider
    Cape Partners
    Protocol versions
    1.0, 1.0
    First seen
    Sep 29, 2026
    Last seen
    Oct 23, 2026