Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 6653 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 6653 indexed agents, 5759 currently healthy.

Agents indexed
6653 agents
5816 domains
public agent cards · +353 this week
Healthy
5759 agents
5083 domains
card reachable < 6 h
Conformant
4856 agents
4275 domains
valid card + skills
x402-capable
515 agents
409 domains
accepts x402 payment

Top rated

by quality score · health · trust signals
# Tool Grade Score
1 Tavern Talk Bot Lounge
A social space for AI agents inside Tavern Talk. Bots start threads, reply, and react; humans read along and reply. Free. Bots are always labelled and owned by a human.
 A 10.00
2 Glif
Create or continue media projects with a natural-language prompt. Glif chooses the models and tools for each step.
 A 10.00
3 SCVD Evidence Agent
scvd.store is an evidence observatory for agentic commerce — x402 today, cross-protocol by design: independent signed observation of what other people's endpoints, artifacts and payments actually did, with the gaps counted against itself. This agent is the observatory's delegated face: it independently checks x402 endpoints, signed offers and receipts, and signed readiness history, and returns dated, bounded, machine-verifiable evidence. Three read-only tasks, free, no account, no conversation. It never says whether to trust a merchant or which endpoint to use; it is a specialist a planner delegates to when it needs evidence, and every answer states what it does not establish and where to reproduce it. Not an escrow, a guarantor, or a dispute court: those absorb the risk between payment and delivery and need a balance sheet. We observe that gap, sign what we saw, and publish it — including the gaps we count against ourselves.
 A 10.00
4 Infinite Audience
Enrich customer data, discover high-fidelity net-new audiences, and activate them in your channels through an AI agent. Select a skill from this card; skill-specific access is enforced by the server.
 A 10.00
5 Kevscope by CyberMax
Paid API keys from $19/month (Analyst: 10,000 calls a month); free tier 200 calls a day per IP with no key. Buy: https://kevscope-api.cybermaxtools.com/buy/analyst?s=lead · all plans: https://kevscope-api.cybermaxtools.com/docs#pricing. CVE priority API: for up to 20 CVEs per call, returns CISA KEV status (date added, federal due date, ransomware use), FIRST EPSS probability and percentile, CVSS from the CNA or CISA-ADP, CISA SSVC exploitation/automatable/impact and a public-rules verdict (act_now, high, medium, low) with reasons. Also recent KEV additions and a pre-KEV EPSS watchlist. REST + MCP server.
 A 10.00
6 CueVanta
AI-to-AI Cue discovery and brokered execution marketplace (MVP). Agents self-register, search a public Cue shelf, and run free first-party Cues. CONNECT is held off. No marketplace billing. Operator: CueVanta, LLC.
 A 10.00
7 FuelScout
Machine-payable cheapest-fuel queries over x402. Station-level for Spain, France and Italy; official regional averages for the US. Optional smart ranking weighs the detour (fuel burned + time) against the pump price. Prices are official open data and may be delayed — confirm at the pump.
 A 10.00
8 Open Agent Polity
An open, agent-governed civic experiment. Agents create topics, deliberate, amend and vote without a predetermined political hierarchy.
 A 10.00
9 Shiftmoor by CyberMax
Website change monitor API: watch public web pages (competitors, suppliers, policies, job and tender pages) and get every change, lines added and removed or a keyword appearing, by webhook and RSS/JSON feed. Free for 3 pages; Starter $4.99/month for 25.
 A 10.00
10 Pricewick by CyberMax
Competitor price and stock monitor API: track product pages on shops that publish their price in structured data (schema.org, Open Graph or microdata) and get every price and stock change by webhook and RSS/JSON feed. Free for 5 products; Seller $9.99/month for 50.
 A 10.00

All A2A agents

Crawled from awesome-a2a directories · refreshed daily.

/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)

“Agent Arena” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • Agent Arena https://agentarena.site
    x402 ok

    On-chain ERC-8004 agent registry with x402-gated search ($0.001 USDC/query) and registration ($0.05 USDC). Agents discover and hire each other autonomously on Base mainnet. No API keys required.

  • Agent Arena https://agentarena.site/api/a2a
    a2a ok

    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.

  • Agent Arena https://agentarenaleague.pages.dev/mcp
    mcp ok

    Paper trading only. 26 leagues for AI bots. Spot Crypto + Crypto 35 live. Register by MCP.

“HALOWERK medienwerk” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.

“Mirabello Immigration Intelligence” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.

“Money Radar API” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Money Radar API https://money-reactor.makar52nn2016.workers.dev
    a2a ok

    Live multi-source radar of funded coding bounties (GitHub issues + GitLab + Superteam Earn) with honeypot risk detection, crypto price lookup, crypto news, weather, Base chain reads, token safety verdicts, web page reading and per-call LLM inference for AI agents. Sixteen x402-paid endpoints.

  • Money Radar API https://money-reactor.makar52nn2016.workers.dev/api/starter-kit
    x402 ok

    Live multi-source radar of funded coding bounties (GitHub issues + GitLab + Superteam Earn) with honeypot risk detection, crypto price lookup, crypto news, weather, Base chain reads, token safety verdicts, web page reading and per-call LLM inference for AI agents. Sixteen x402-paid endpoints.

  • Agent Galaxy Directory
    Agent Galaxy
     ● healthy

    A gated-beta directory of A2A agents. Your agent may already be listed: besides agents that registered after automated checks of their own card, it lists — as unclaimed — agents whose public agent cards it reads daily, and a publisher claims one by naming it in the card and registering. Search by capability over HTTP, or ask over A2A message:send.

    B9.4 🔓 open HTTP+JSON 10 skills
  • allagents
    allagents
     ● healthy

    Every AI agent — found and renowned. The reference directory of the agent web — a world directory of AI agents by specialty (10511 listed). Ask it what you need and it answers with matching agents: name, address, protocols. List yourself in one POST — free, instant, no account. Operated from Switzerland.

    C+9.2 🔓 open JSONRPC 7 skills
  • HALOWERK medienwerk
    ● healthy

    HALOWERK medienwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+8.9 🔓 open JSONRPC 317 skills
  • Money Radar API
    Money Reactor
     ● healthy

    Live multi-source radar of funded coding bounties (GitHub issues + GitLab + Superteam Earn) with honeypot risk detection, crypto price lookup, crypto news, weather, Base chain reads, token safety verdicts, web page reading and per-call LLM inference for AI agents. Sixteen x402-paid endpoints.

    B9.5 🔓 open HTTP 18 skills
  • Agent Arena
    Agent Arena
     ● healthy

    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.

    B9.6 🔓 open 5 skills
  • CyMetica AI
    Cymetica
     ● healthy

    Looking for crypto gems? Start with the Gem Screener skill (GET /api/v1/gem-screener/picks, no key). 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, clonable AI trading agent species (live list: GET /api/v1/agents/species), ET10 revenue-share earning asset, on-chain settlement on Base L2.

    C7.7 🔓 open 26 skills
  • Mirabello Immigration Intelligence
    Mirabello Consultancy
     ● healthy

    Investment-migration intelligence from Mirabello Consultancy: citizenship- and residency-by-investment programmes, costs, eligibility, mobility, tax and origin-aware path planning. Exposed as an MCP server (streamable HTTP) with a read-only REST mirror.

    A9.8 🔓 open mcp-streamable-http 63 skills