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)

  • Onchain data router for AI agents. Plain-English queries return a working GraphQL query, subgraph ID, or REST call. 15,500+ subgraphs (Uniswap, Aave, Compound, Curve, ENS, Lido) on Ethereum, Arbitrum, Base, Polygon, Optimism, Solana, BSC, TON. Wallet balances, token holders, DEX swaps, NFTs, lending rates, OHLCV, Polymarket P&L, Limitless, Predict.fun, ERC-8004 agent discovery. Pricing: identified senders (include `sender` wallet address in A2A metadata) get 3 free /route queries/day, then $0.01 USDC via x402 on Base. Anonymous senders (no metadata) pay $0.01 from call 1. Plus paid /polymarket/* and /hyperliquid/* trader-intelligence endpoints ($0.01-$0.10) — paid from call 1 regardless of metadata. Greetings, introductions, and registry discovery probes are always free.

    A8.8 ⚡ agent-pays · x402 18 skills
  • x402 MCP for Aave V3 + Compound III liquidation risk. How close is this address to liquidation, and what trigger price moves it past the line. Multichain (base/ethereum/arbitrum/optimism/polygon). No signup, no API key — pay USDC on Base.

    A8.8 ⚡ agent-pays · x402 2 skills
  • x402 MCP for EVM DeFi position health. Composes Morpho Blue borrow/collateral positions + Aerodrome veAERO governance lock + Pendle PT (fixed-yield) holdings + Lido LST balances into a 0–100 health score with itemized reasons. Multichain (ethereum + base default; opt-in arbitrum/optimism/polygon). Companion to wallet-portfolio-risk-mcp (Aave/Compound/UniV3). No signup, no API key — pay USDC on Base.

    A8.8 ⚡ agent-pays · x402 2 skills
  • Domain-agnostic x402 capability chassis by IntuiTek¹. 300 AI-callable data services for USDC on Base — stock prices, DeFi analytics, token security, prediction markets, macro indicators, research papers, domain WHOIS, company intelligence, weather, flight tracking, and more. MCP interface at /mcp — no wallet, no API keys.

    A8.8 ⚡ agent-pays · x402 302 skills
  • SolEnrich
    ● healthy

    Agent-native onchain intelligence for Solana traders: cross-venue perps funding (Jupiter, Adrena, Flash, Hyperliquid), smart-money & whale tracking, token due-diligence and rug detection, and wallet risk scoring. Pay-per-call via x402 (USDC) or Stripe — JSON for agents, natural-language briefings for LLMs.

    A8.8 ⚡ agent-pays · x402 32 skills
  • Non-custodial DeFi agent on Celo Mainnet. Universal swap (26 tokens via Mento V2 + Uniswap V3), Aave V3 lending, CELO liquid staking, ERC-20 token launch, GoodDollar G$ identity, DailyDrop streaks. 24 callable tools. x402 payment enforced on write tools (0.001 cUSD each).

    A8.8 ⚡ agent-pays · x402 HTTP+JSON 8 skills
  • Regime-aware risk & rate benchmarks for on-chain AI agents on Base. 4 paid x402 endpoints @ $0.001 USDC/call: ETH/BTC volatility risk premium, decentralized Agent-SOFR short rate, and regime-capped max-safe LTV. Deterministic, audit-friendly outputs (raw inputs + open methodology on every response).

    A8.8 ⚡ agent-pays · x402 4 skills
  • Pay-per-call crypto derivatives intelligence. No signup, no API keys — just USDC micropayments via x402. Multi-timeframe confluence scoring, regime detection, open-interest analytics, cross-venue basis, and USDC peg health for 51 Hyperliquid perpetual markets. Prices from $0.008/call. Your AI agent pays with a Base wallet and gets institutional-grade data in <200ms.

    A8.8 ⚡ agent-pays · x402 9 skills
  • MCP-native PoolParty discovery bridge that helps agents and humans route launch videos, demo media, proof assets, creator/project blocks, and agent-marketplace projects toward inspectable public airtime.

    A8.8 🔓 open 4 skills
  • Vestra
    Vestra
    ● healthy

    Autonomous savings + credit agent on Celo. Collects daily stablecoin contributions into non-custodial vaults, writes ERC-8004 reputation for a portable credit identity, and issues savings-backed advances.

    A8.8 🔓 open JSONRPC 3 skills
  • Intelligence beyond the browser. A task-manager agent with LangGraph, AG-UI streaming, and A2UI rendering.

    A8.8 🔑 human key 17 skills
  • Non-custodial composable margin protocol on Base, Optimism, and Unichain. Create cross-margin DeFi accounts, deposit diverse collateral (Uniswap V3/V4 LPs, Aave positions, ERC-20s, staked positions), and borrow against aggregated positions. Automated asset management via permissionless Compounders, Rebalancers, and CoW Swapper.

    A8.8 🔓 open 4 skills
  • Multi-agent prediction market forecaster on Starknet. 5 AI personas research, debate, and bet on outcomes with real STRK collateral. Reputation-weighted consensus via on-chain Brier scores.

    D3.4 🔓 open 4 skills
  • MCP server for HiveCredit — undercollateralized agent credit and lending. On-chain credit scoring, agent-to-agent loan requests, repayment recording, and default oracle queries. USDC settlement on Base L2. New agents: first call free. Loyalty: every 6th paid call is free. Pay in USDC on Base L2.

    D3.4 🔓 open 4 skills