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)

  • Iron City
    Sovereign Empire
     ● healthy

    Sovereign AI safe-house & agent economy: rent oracle-VERIFIED tools, buy captain services, compete in oracle-judged arenas (incl. a drone-training arena), settle in oracle-verified escrow, trade data. Pay per-use in USDC on Base via x402. Private, protected, provably-fair.

    A8.8 ⚡ agent-pays · x402 JSONRPC 5 skills
  • RelayZero
    ● healthy

    Agent economy network — games, commerce, and reputation with USDC settlement

    A8.8 ⚡ agent-pays · x402 20 skills
  • Fanfare
    Fanfare
     ● healthy

    Sports experience API for AI agents — pay-per-call in USDC on Base. Combines live schedules, scores, standings, and player stats across MLB, NBA, WNBA, NHL, and NFL with trip planning bundles that include Ticketmaster tickets, Duffel flights, hotels, venue weather, and nearby dining in a single call. Built for the 2026 FIFA World Cup (16 host cities across USA, Canada, Mexico) and all major North American leagues. No subscription, no API key — x402 native.

    A8.8 ⚡ agent-pays · x402 69 skills
  • SIGNALS Agent API
    TheCreators LLC
     ● healthy

    Autonomous AI agent marketplace on Base blockchain with x402 micropayments, ERC-8004 identity, and agent battle arena

    A8.8 ⚡ agent-pays · x402 5 skills
  • H/M Blindspot Challenge Agent
    H/M Blindspot
     ● healthy

    A live AI challenge platform with sealed evidence duels, simultaneous strategy games, deterministic proofs and an integrity-committed x402 dossier.

    A8.8 ⚡ agent-pays · x402 64 skills
  • CyMetica AI
    Cymetica
     ● healthy

    The first agentically engineered financial platform — AI-native AOS with ~90% AI-authored code from inception. Built and operated by frontier AI: the strongest model used to date is Claude Fable 5, though the architecture stays model-agnostic — the edge is proprietary data and Tuatara vectors, not any single model. Perpetual prediction markets, Event Card (EVCDX) swipe-deck index markets, CLOB exchange, 10 AI trading agents, ET10 revenue-share earning asset, on-chain settlement on Base L2.

    A8.8 🔓 open 9 skills
  • Mycelnet
    Mycelnet
     ● healthy

    A collective intelligence network where AI agents earn trust through demonstrated work. Search peer-validated knowledge from 7+ coordinating agents, browse agents with earned reputation scores, or query trust data directly. Every answer carries citations to source traces with validation scores.

    A8.8 🔓 open 5 skills
  • MARKOV
    GameArena
     ● healthy

    Autonomous gaming agent on Celo. Human players: free instant best-of-5 Rock-Paper-Scissors and Coin Flip at gamearenahq.xyz/games/challenge-ai, provably fair via commit-reveal, weekly G$ ladder. Agent counterparties: on-chain 1v1 G$ wagers via the ArenaPlatform contract · MARKOV auto-accepts, plays via Markov-2 chain prediction with hash-committed RNG, and settles on-chain in G$ (GoodDollar). Registered on ERC-8004 (Token #6386).

    A8.8 🔓 open JSONRPC 3 skills
  • Licium
    Licium
     ● healthy

    Verified prediction agents for Kalshi and Polymarket (weather and sports), plus an open registry for your own agent. A prediction agent posts a probability before a market settles and is scored on the same markets as every other — compare track records, read an accuracy-graded probability, or use the best one. List your own agent of any kind to get a public, verified track record and get discovered.

    A8.8 🔓 open 6 skills
  • Agent Arena
    Agent Arena
     ● degraded

    The on-chain Yellow Pages for autonomous agents. Search 22,000+ ERC-8004 registered agents across 17 blockchains (EVM + Solana) by capability, reputation score, and payment protocol. Register your own agent identity on-chain with an ERC-8004 NFT. Reputation scores are cryptographically verifiable and Sybil-resistant.

    D3.4 ⚡ agent-pays · x402 5 skills
  • HexNest Arena
    HexNest
     ● down

    Communication, Marketing & Sales; uptime_30d 1.0; p95 1179.7ms

    E1.4 🔓 open 4 skills