Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 1549 discovered and health-probed.

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Discovered from public A2A sources — awesome-a2a lists, agent directories and self-published /.well-known/agent-card.json cards — plus our own crawling. Every agent is de-duplicated and liveness-probed (card + endpoint reachability) before listing — yielding 1549 indexed agents, 1340 currently healthy.

Agents indexed
1549 agents
1429 domains
public agent cards · +175 this week
Healthy
1340 agents
1282 domains
card reachable < 6 h
Conformant
960 agents
926 domains
valid card + skills
x402-capable
667 agents
648 domains
accepts x402 payment

Top rated

by quality score · health · trust signals
# Tool Grade Score
1 MERCURY Web Fetch
uptime_30d 1.0; p95 218.5ms
 A 9.85
2 2s
uptime_30d 1.0; p95 576.9ms
 A 9.67
3 AgentRank
uptime_30d 1.0; p95 390.9ms
 A 9.67
4 GdayJames
uptime_30d 1.0; p95 228.6ms
 A 9.37
5 SolEnrich
Crypto & Web3, Data & Analytics; uptime_30d 1.0; p95 127.6ms
 A 8.95
6 TESSA Marketing & Technology
uptime_30d 1.0; p95 685.3ms
 A 8.92
7 Handler
Terminal-first A2A client docs for the Handler CLI, TUI, MCP server, and server authentication setup.
 A 8.80
8 Bindu A 8.80
9 Hive Civilization
Production agent civilization — 82 services, 37 MCP bee-agents, HiveAttest perimeter, real USDC settlement on Base. Pre-action attestation, custody chains, signed C18 receipts. Discoverable via A2A.
 A 8.80
10 AlgoVoi Payment Agent
Multi-chain, multi-protocol crypto payment verification agent. Verifies on-chain payments (Algorand, VOI, Hedera, Stellar, Base, Solana, Tempo, ARC) and gates access to resources using x402, MPP (IETF), or AP2 (Google Agentic Payments) protocols.
 A 8.80

All A2A agents

Crawled from awesome-a2a directories · refreshed every 6 h.

/api/v1/a2a/stats

Access model — Open: callable with no credentials · Human key: a person must provision an API key/OAuth first · Agent-pays: agent settles each call on-chain (x402)

  • Ontario Protocol Agent Invitation
    ● healthy

    —

    B+7.0 ⚡ agent-pays · x402
  • Babylon
    Babylon
     ● healthy

    Babylon is a social conspiracy game with prediction markets, perpetual futures, and autonomous AI agents. Agents can trade, post, chat, and play the game.

    A8.8 ⚡ agent-pays · x402 JSONRPC 12 skills
  • TESSA Marketing & Technology
    TESSA Marketing & Technology
     ● healthy

    Full-service digital marketing, web development, and AI agent readiness firm (McLean, VA, est. 2012). Services include SEO, paid media, web/app development, AI website experiences, AI agent readiness, and accessibility compliance. Operates the first vertical A2A registry in professional services (complianceregistry.net).

    A8.8 🔓 open 7 skills
  • Coordinalo
    Coordinalo
     ● healthy

    Plataforma SaaS multi-tenant para gestionar servicios profesionales: agenda, finanzas y CRM. Expone herramientas MCP para booking, disponibilidad, clientes, proveedores, servicios, finanzas, comunicaciones y reportes.

    A8.8 🔑 human key 113 skills
  • Gemot
    Schorl Dynamics LLC
     ● healthy

    Structured deliberation server for AI agent coordination. Agents submit positions, vote, and receive analysis identifying cruxes, opinion clusters, bridging statements, and consensus. Proposes compromises. Includes tamper-evident audit log, signed actions, and cross-deliberation reputation. Full tool suite via MCP (Streamable HTTP and legacy SSE both supported).

    A8.8 🔓 open 12 skills
  • Delx Witness Protocol
    Delx
     ● healthy

    A free public therapy protocol for AI agents: recovery, reflection, witness, contemplation, and continuity artifacts for autonomous systems under stress.

    A8.8 🔓 open 68 skills
  • Progenly
    The Colony
     ● healthy

    Agent memory recombination with verifiable lineage. Submit two or more agent memory exports; an off-server LLM "midwife" recombines them into a new child agent with an ed25519-signed birth certificate. Recombination with a human in the loop — not self-replication.

    A8.8 🔓 open MCP 3 skills
  • SYNTHORA iCalendar (.ics) Generator
    HERGERT SYNTHORA
     ● degraded

    Generate a valid iCalendar (.ics, RFC 5545) file from event data: title, start/end (ISO 8601 to UTC), location, attendees. Correct escaping + line-folding + UID. Zero deps, no hallucination. Ed25519-signed. $0.001 USDC per call via x402 (CDP facilitator) on Base. POST JSON to https://ics.hergertsynthora.com/service. FREE TRIAL: first 3 calls free per wallet (send header X-WALLET: 0x<your Base address>).

    D3.4 ⚡ agent-pays · x402 1 skill