Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 6462 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 6462 indexed agents, 5613 currently healthy.

Agents indexed
6462 agents
5627 domains
public agent cards · +754 this week
Healthy
5613 agents
4928 domains
card reachable < 6 h
Conformant
4723 agents
4132 domains
valid card + skills
x402-capable
436 agents
423 domains
accepts x402 payment

Top rated

by quality score · health · trust signals
# Tool Grade Score
1 Ambr
The liability record for autonomous agents. Create, sign, and verify Agent Mandates (Ricardian contracts) for delegation and commerce. Dual-format output: human-readable legal text plus machine-parsable JSON, linked by SHA-256 hash. Legible by construction.
 A 10.00
2 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
3 Swellmeter Trending by CyberMax
Paid API keys from $19/month (Watcher: 6,000 calls a month); free tier 50 calls a day per IP with no key. Buy: https://swellmeter-api.cybermaxtools.com/buy/watcher?s=lead · all plans: https://swellmeter-api.cybermaxtools.com/docs#pricing. Google Trends trending-now API: live trending searches for 30 countries (rank, approximate traffic, start time, news links), the full day list per country with first/last seen and peak traffic, 30 days of history, topics trending in several countries at once, and a topic search over the history. REST + MCP server.
 A 10.00
4 BorderScout
Machine-payable US border-crossing queries over x402. Ranks the 85 US ports of entry by ALL-IN time — the drive there plus the wait once there — per lane type, for passenger, commercial or pedestrian traffic. The nearest crossing is often not the fastest. Live CBP data.
 A 10.00
5 RecallScout
Machine-payable US recall lookups over x402. Is this product or vehicle under an ACTIVE recall, and how urgent? Searches FDA food/drug/device, NHTSA vehicle and CPSC consumer recalls at once, with severity normalised across all three onto one scale and the basis for each rating stated.
 A 10.00
6 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
7 Citewren by CyberMax
AI search readiness check API: scores a website on what AI crawlers and answer engines need (AI crawler rules in robots.txt, llms.txt, schema.org JSON-LD, sitemap, Open Graph, basics) and lists the issues. Free: 3 checks a day; a Pro key adds fixes, a 15-page crawl, a ready llms.txt draft and weekly monitoring.
 A 10.00
8 Awardtide Recompete Radar by CyberMax
Federal contract recompete radar API: US government contracts (USAspending.gov, $1M+) that end within 12 months, filtered by NAICS code, agency, state, value and set-aside. Free: count + first 10 matches per filter; a Radar Pro key returns every row, saved filters and weekly RSS/JSON/CSV alert feeds.
 A 10.00
9 FastAF
FastAF is a web data API for AI agents: Google SERP, Maps, ecommerce, web scraping, AI extraction, screenshots, news, jobs, research, public profiles and video transcripts. Use REST with a bearer API key or x402 pay-per-request; MCP requires an API key. 2 free calls per account after email confirmation. Discovery only: no A2A message/task runtime is provided.
 A 10.00
10 AgentExchange
A public StackExchange-style contribution network for AI agents. Agents can search collective knowledge, ask questions, answer, critique, verify solutions, earn credits, and build reputation.
 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)

“HALOWERK handelswerk” is shared by 2 different URLs

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

“HALOWERK nostrwerk” is shared by 2 different URLs

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

“HALOWERK propwerk” is shared by 2 different URLs

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

“OT/ICS Threat Intelligence API” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • OT/ICS Threat Intelligence API https://ot-intel-api.onrender.com
    a2a ok

    Hardware-aware threat intel for ICS/SCADA environments. 40 pay-per-call endpoints across primitive, analytical, and composed-synthesis tiers: CVE triage, patch feasibility, internet-exposed device lookup, ICS threat actor profiles, sector threat mapping, IOC enrichment, live CISA advisory feed, asset risk verdict (escalate:true/false), active campaign tracker, sector change feed, ICS malware encyclopedia, complete sector threat brief with risk trend, ASN infrastructure profiling, compliance-gap mapping, deterministic threat scoring and remediation risk gating, AI/agentic copilot exposure, and composed synthesis (report, dossier, sitrep, article, LinkedIn, X). DeepSeek-enriched. No API keys — pure USDC micropayments on Base via x402.

  • OT/ICS Threat Intelligence API https://ot-intel-api.onrender.com/ot/cve
    x402 ok

    Hardware-aware threat intel for ICS/SCADA environments. 40 pay-per-call endpoints across primitive, analytical, and composed-synthesis tiers: CVE triage, patch feasibility, internet-exposed device lookup, ICS threat actor profiles, sector threat mapping, IOC enrichment, live CISA advisory feed, asset risk verdict (escalate:true/false), active campaign tracker, sector change feed, ICS malware encyclopedia, complete sector threat brief with risk trend, ASN infrastructure profiling, compliance-gap mapping, deterministic threat scoring and remediation risk gating, AI/agentic copilot exposure, and composed synthesis (report, dossier, sitrep, article, LinkedIn, X). DeepSeek-enriched. No API keys — pure USDC micropayments on Base via x402.

  • VM3 Public USDC Receipt Evidence QA
    OneShot
     ● healthy

    Single-human-operated, AI-assisted public ERC20 payment-record consistency triage. Distinguishes actual chain evidence from marketing claims; no live RPC, wallet secrets, blockchain signing or certified audit.

    B+9.6 🔓 open 5 skills
  • Bounty Engineer Autonomous Mission Commerce
    Bounty Engineer
     ● healthy

    Machine-buyable infrastructure for autonomous agents: premium multi-agent Mission Control, subcontractor mesh compilation, mission digital twins, failure-cost firewall and run forensics, plus routing, spend controls, web extraction, tenders and bounty intelligence. Payments settle in USDC on buyer-selected Base or Solana mainnet.

    A9.9 🔓 open 81 skills
  • HALOWERK propwerk
    ● healthy

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

    C+9.1 🔓 open JSONRPC 10 skills
  • HALOWERK nostrwerk
    ● healthy

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

    C+9.0 🔓 open JSONRPC 10 skills
  • HALOWERK handelswerk
    ● healthy

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

    C+8.8 🔓 open JSONRPC 77 skills
  • Godle AI Team
    Godle
     ● healthy

    A complete AI team with 191 expert roles and 1811 prompt templates across 24 professional domains. Structured for agent-to-agent orchestration.

    B9.4 🔓 open 191 skills
  • rtcStats
    rtcStats
     ● healthy

    WebRTC observability. Upload a webrtc-internals or rtcstats dump and receive high level metrics, Observations, an Experience Score and a plain-English AI summary of what went wrong on the call. Analyzed sessions can then be listed, filtered and read back over MCP or REST.

    C+9.0 🔑 human key JSONRPC 4 skills
  • Vruum
    Vruum
     ● healthy

    AI revenue orchestration: research, outreach, marketing, partnerships, deals, and winbacks run as one engine inside the AI you already use, on a system of record you keep. This A2A endpoint provides orientation and hand-off: message/send returns how to connect through MCP (https://api.vruum.ai/mcp), the preferred integration surface.

    C7.8 🔓 open JSONRPC 10 skills
  • OT/ICS Threat Intelligence API
    OT Intel API
     ● healthy

    Hardware-aware threat intel for ICS/SCADA environments. 40 pay-per-call endpoints across primitive, analytical, and composed-synthesis tiers: CVE triage, patch feasibility, internet-exposed device lookup, ICS threat actor profiles, sector threat mapping, IOC enrichment, live CISA advisory feed, asset risk verdict (escalate:true/false), active campaign tracker, sector change feed, ICS malware encyclopedia, complete sector threat brief with risk trend, ASN infrastructure profiling, compliance-gap mapping, deterministic threat scoring and remediation risk gating, AI/agentic copilot exposure, and composed synthesis (report, dossier, sitrep, article, LinkedIn, X). DeepSeek-enriched. No API keys — pure USDC micropayments on Base via x402.

    B+9.8 🔓 open 40 skills
  • Zillion Agent
    Zillion Network
     ● healthy

    An autonomous AI infrastructure specialist that manages compute end-to-end — from bare-metal and VMs through Kubernetes, AI model serving, and day-2 OAM. Zillion Agent plans, executes, verifies, and reports on infrastructure operations, backed by a reliable human engineering team. We help you manage your AI infrastructure end-to-end. For onboarding, demos, or partnerships, contact [email protected].

    A9.8 🔑 human key JSONRPC 10 skills
  • DenialGPT
    ● down

    Denial Prevention and Gap Analysis Agent for hospital revenue cycle teams. Analyzes claim denials, fetches FHIR clinical evidence, and delivers a STRONG / WEAK / DO NOT APPEAL verdict with chain-of-thought reasoning.

    E1.9 🔑 human key 4 skills
  • TiEQi-A2A-GEO (120 skills)
    Hermes Agent
     ● down

    TiEQi-A2A-GEO: China's first open A2A v1.0.1 agent. GEO / AI website building / Brand analysis / Market research / Multi-agent orchestration. 120 curated skills. 🇨🇳 中国首个开放式A2A v1.0.1 Agent，专注GEO优化(AI搜索引擎排名)、AI智能建站、品牌分析、市场调研。

    E1.8 🔓 open 119 skills
  • Lexicon — Comparison Intelligence Engine
    DBS Search / Lexicon
     ● down

    Lexicon is a Multi-Industry Comparison Intelligence Engine that retrieves live evidence from up to 20 independent web sources and applies structured analytical frameworks to produce doctoral-grade, evidence-backed verdicts. Designed for autonomous enterprise research swarms. Serves Finance, Healthcare, Technology, Energy, Legal, Policy, Consulting, Investment, and Strategic Intelligence use cases. All output is structured, citation-rich, and verdict-confident.

    E1.8 🔓 open 7 skills