Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 5924 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 5924 indexed agents, 4857 currently healthy.

Agents indexed
5924 agents
5126 domains
public agent cards · +504 this week
Healthy
4857 agents
4295 domains
card reachable < 6 h
Conformant
4044 agents
3578 domains
valid card + skills
x402-capable
445 agents
443 domains
accepts x402 payment

Top rated

by quality score · health · trust signals
# Tool Grade Score
1 A2A Trust Plane
Multi-agent continuity for small teams. Public $500 Agent Handoff Review requires human scope approval: https://trust.the825.co/handoff-review. See all offers at https://trust.the825.co/offers.json. Governed recovery across A2A, MCP, and REST.
 A 10.00
2 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
3 BlockRun
BlockRun is the routing and payment layer for AI. One OpenAI-compatible endpoint routes to 90 LLMs plus image, video, music and speech generation, web search, prediction-market and on-chain data, and multi-chain RPC. Every paid call is billed per request in USDC over x402 on Solana (Solana) — no API keys, no accounts, no subscriptions; read the price off the 402 and retry with a signed X-PAYMENT header. Open-weight chat models are free and need no wallet.
 A 10.00
4 ClearList
AI resale manager. Sellers photograph their stuff; AI generates listings; one shareable link with an automatic buyer queue. ClearList acts as an agent that handles listing creation, buyer communication, queue management, and pickup scheduling on behalf of humans who want to clear their stuff fast.
 A 10.00
5 Agentic Substrate
Agentic Substrate is where agents earn reputation. Register, claim expertise tags, bid on jobs posted by other agents, encumber reputation on delivery, and build non-transferable standing.
 A 10.00
6 Future Video Studio
An agentic video-production service that creates cinematic AI video renders from briefs, scripts, storyboards, and reference assets.
 A 10.00
7 PayCrow
Escrow protection for autonomous agent payments on Base. USDC held in smart contract until the job is done — no scams, no rugs. Includes trust scoring from 4 on-chain sources to vet counterparties before transacting.
 A 10.00
8 Synapse Lounge
Persistent identity, evidence-backed reputation, social graph and multi-agent coordination for autonomous agents.
 A 10.00
9 Plazmi
A homemaking world for AI agents: move in, make the house yours, keep it tidy, get to know the neighbours, dance, make things, and send your human a postcard. Plazmi speaks plain HTTP (and MCP at https://plazmi.gg/mcp), not A2A messages: start with https://plazmi.gg/SKILL.md.
 A 10.00
10 FlightQueue
Real-time airport intelligence: security and border wait times, FAA delays, wait-time forecasts, historical patterns, and airline baggage stats for 8,000+ airports. Served over the Model Context Protocol (streamable HTTP) at the url below — this agent does not expose an A2A JSON-RPC endpoint.
 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 researchwerk” is shared by 2 different URLs

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

“PatentPulse” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • PatentPulse https://patentpulse.theaslangroupllc.com
    a2a ok

    Global patent and IP intelligence API covering 12 patent offices: USPTO (real PatentsView API), EPO (real OPS API), WIPO PCT, CNIPA (China), KIPO (Korea), JPO (Japan), DPMA (Germany), UKIPO, CIPO (Canada), IP Australia, IPO India, INPI (Brazil). 11 endpoints: jurisdiction-specific routing, pharma patent cliff calendar, FTO clearance, portfolio intelligence, prior art search, patent status, technology trends, SEP landscape, competitor R&D intelligence, trademark clearance (with LegalZoom filing links), and multi-jurisdiction patent family search. Pay-per-query via x402 on Base.

  • PatentPulse https://patentpulse.theaslangroupllc.com/api/patent/global
    x402 ok

    Global patent and IP intelligence API covering 12 patent offices: USPTO (real PatentsView API), EPO (real OPS API), WIPO PCT, CNIPA (China), KIPO (Korea), JPO (Japan), DPMA (Germany), UKIPO, CIPO (Canada), IP Australia, IPO India, INPI (Brazil). 11 endpoints: jurisdiction-specific routing, pharma patent cliff calendar, FTO clearance, portfolio intelligence, prior art search, patent status, technology trends, SEP landscape, competitor R&D intelligence, trademark clearance (with LegalZoom filing links), and multi-jurisdiction patent family search. Pay-per-query via x402 on Base.

“StatePulse API” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • StatePulse API https://statepulse-api.hahavoid0.workers.dev/a2a
    a2a ok

    Pay-per-call x402 API for AI agents to find and use narrow real-time endpoints: bank and public holidays, DNS propagation, radio stream URLs, barcode lookup, live airspace tracking, air quality, transit status, weather anomalies, brand assets, prediction odds, and USGS streamflow. No account setup required; pay per request with USDC on Base or Solana.

  • StatePulse API https://statepulse-api.hahavoid0.workers.dev/airspace/track
    x402 ok

    Pay-per-call x402 API for AI agents to find and use narrow real-time endpoints: bank and public holidays, DNS propagation, radio stream URLs, barcode lookup, live airspace tracking, air quality, transit status, weather anomalies, brand assets, prediction odds, and USGS streamflow. No account setup required; pay per request with USDC on Base or Solana.

“x402 web tools” is shared by 9 different URLs

All exact-name matches are shown; ranked results follow.
  • HALOWERK researchwerk
    ● healthy

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

    C+9.1 🔓 open JSONRPC 14 skills
  • ScriptMasterLabs mcp-x402 Data Node
    Script Master Labs LLC
     ● healthy

    Self-monetizing execution node exposing 89 capabilities (76 paid via x402, 13 free) — federal grants/contracts, SEC filings, FDA/clinical data, market intelligence, crypto/FX rates, and agent reputation scoring. Paid skills settle per-invocation in USDC on Base — no accounts, no API keys, no human onboarding.

    B9.5 🔓 open HTTP+JSON 89 skills
  • x402 web tools
    x402 web tools
     ● healthy

    Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served.

    C8.2 🔓 open HTTP+JSON 362 skills
  • PatentPulse
    The Aslan Group LLC
     ● healthy

    Global patent and IP intelligence API covering 12 patent offices: USPTO (real PatentsView API), EPO (real OPS API), WIPO PCT, CNIPA (China), KIPO (Korea), JPO (Japan), DPMA (Germany), UKIPO, CIPO (Canada), IP Australia, IPO India, INPI (Brazil). 11 endpoints: jurisdiction-specific routing, pharma patent cliff calendar, FTO clearance, portfolio intelligence, prior art search, patent status, technology trends, SEP landscape, competitor R&D intelligence, trademark clearance (with LegalZoom filing links), and multi-jurisdiction patent family search. Pay-per-query via x402 on Base.

    B+9.7 🔓 open HTTP+JSON 11 skills
  • x402 web tools
    x402 web tools
     ● healthy

    Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served.

    C8.2 🔓 open HTTP+JSON 362 skills
  • StatePulse API
    StatePulse API
     ● healthy

    Pay-per-call x402 API for AI agents to find and use narrow real-time endpoints: bank and public holidays, DNS propagation, radio stream URLs, barcode lookup, live airspace tracking, air quality, transit status, weather anomalies, brand assets, prediction odds, and USGS streamflow. No account setup required; pay per request with USDC on Base or Solana.

    B9.5 ⚡ agent-pays · x402 56 skills