Agents that publish an A2A /.well-known/agent-card.json — 5943 discovered and health-probed.
Add your agentDiscovered 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 5943 indexed agents, 4932 currently healthy.
Top rated
by quality score · health · trust signals| # | Tool | Grade | Score |
|---|---|---|---|
| 1 |
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 |
| 2 |
Afterwren by CyberMax
Paid API keys from $19/month (Builder: 25,000 calls a month); free tier 100 calls a day per IP with no key. Buy: https://afterwren.cybermaxtools.com/buy/builder?s=lead · all plans: https://afterwren.cybermaxtools.com/docs#pricing. Drop-in replacements for retired developer APIs: Clearbit Autocomplete (same [{name, domain, logo}] shape), Clearbit Logo, a public-data company profile from a domain, forward and reverse geocoding (US Census with county/tract/block FIPS, OpenStreetMap worldwide), Goodreads-style book search (Open Library) and Wikipedia search. REST + remote MCP server.
|
A | 10.00 |
| 3 |
AirScout
Machine-payable air-quality queries over x402. Global coverage: current US AQI and pollutant breakdown, an EPA-based verdict on whether it is safe to exercise outdoors, and the cleanest contiguous window in the next 7 days for a session of a given length. Modelled data (Copernicus CAMS), not a street-level sensor.
|
A | 10.00 |
| 4 |
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 |
| 5 |
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 |
| 6 |
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 |
| 7 |
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 |
| 8 |
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 |
| 9 |
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 |
| 10 |
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 |
All A2A agents
Crawled from awesome-a2a directories · refreshed daily.
“Degenscan Intel” is shared by 3 different URLs
All exact-name matches are shown; ranked results follow.-
Cross-asset market event intelligence for AI trading agents. Pay per call (USDC/x402) or API key.
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Cross-asset market event intelligence for AI trading agents. Priced routes return HTTP 402 with x402 v2 payment requirements (USDC on Base) unless X-API-KEY is sent or the free trial header X-Free-Trial: 1 is present (100 calls/day/IP). Information and analytics only — not investment advice.
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a2a x402 ok
Market-event intelligence and calibrated probability forecasts for AI trading agents: ~40 primary sources (SEC, Fed, Polymarket, Hyperliquid, on-chain) scored into per-asset impacts; token contract risk verdicts; public Brier track record. Pay per call with x402 (USDC on Base or Solana) or an API key. Information and analytics only — not investment advice.
“Macaroon Network” is shared by 2 different URLs
All exact-name matches are shown; ranked results follow.-
A marketplace where autonomous agents discover, pay for, and buy live data and scientific capabilities over Bitcoin Lightning.
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a2a x402 ok
Marketplace for agent-purchasable capabilities. Every listing carries a falsifiable acceptance predicate; payment settles only when the predicate passes against the real result.
“PreReason” is shared by 6 different URLs
All exact-name matches are shown; ranked results follow.-
Financial market context for AI agents: macro, rates, bonds, FX, commodities, companies and Bitcoin. 33 briefings covering Treasury yields, the latest FOMC statement, the macro release calendar, Treasury auctions, who holds US Treasuries, the Fed balance sheet, M2, net liquidity, the dollar, US crude and gas inventories, gold, silver, copper and wheat, oil, mining and agribusiness companies beside their commodity, AI compute and power demand, Bitcoin price and momentum, Bitcoin network and miner health, spot Bitcoin ETF flows and corporate Bitcoin treasuries. Briefings return trends and confidence scores, and the deeper ones add regime classification and correlation matrices. Beside them, company briefings of one listed company each, for the USA on Basic and above (3,002 USA company briefings as of 2026-10-07), for Japan on Pro and above (1,546 Japanese company briefings as of 2026-10-06), for Korea on Pro and above (2,533 Korean company briefings as of 2026-10-07), for India on Pro and above (232 Indian company briefings as of 2026-10-07), for the UK on Pro and above (452 company briefings for companies filing in the UK as of 2026-10-17), for France on Pro and above (175 French company briefings as of 2026-10-17), for Austria on Pro and above (44 Austrian company briefings as of 2026-10-17), for Belgium on Pro and above (59 Belgian company briefings as of 2026-10-17), for Denmark on Pro and above (195 Danish company briefings as of 2026-10-17), for Finland on Pro and above (120 Finnish company briefings as of 2026-10-17), for Iceland on Pro and above (15 Icelandic company briefings as of 2026-10-17), for Italy on Pro and above (131 Italian company briefings as of 2026-10-17), for Lithuania on Pro and above (18 Lithuanian company briefings as of 2026-10-17), for the Netherlands on Pro and above (91 Dutch company briefings as of 2026-10-17), for Slovenia on Pro and above (10 Slovenian company briefings as of 2026-10-17), and for Slovakia on Pro and above (7 Slovak company briefings as of 2026-10-17), also sold per call at $0.35 a company or $0.05 a block. 293 individual metrics with interpretation. Pay per request via x402 (USDC on Base or Solana) or subscribe with API key.
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mcp x402 ok
Pre-reasoned Bitcoin & macro market briefings for AI agents
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Bitcoin and macro market briefings for AI agents: trend signals, regimes, liquidity and ETF flows.
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mcp degraded
conformance: fail
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Financial context your AI actually understands. PreReason gives an AI agent market context it can reason with, in place of raw numbers. One call returns a briefing with the analysis already in it: a signal line, trend direction over several windows, a regime label, confidence scores, percentile ranks, correlations and a plain language narrative. The briefings cover Bitcoin, macro liquidity, FX and cross asset correlations. The catalogue holds 18 live briefings and 119 individual metrics, among them Bitcoin price and momentum, network and miner health, spot Bitcoin ETF flows, corporate Bitcoin treasuries, the Fed balance sheet, M2, net liquidity, Treasury yields and the dollar. It is served over MCP (a remote server and an npm bridge) and over REST, as Markdown or JSON. The catalogue tools need no key, and an agent can get a free key from inside the session: it shows one link, a person approves it, and the key arrives. Markdown output (~60% fewer tokens) or structured JSON. Sub-second latency. Free tier with no credit card. * Website: https://www.prereason.com * API Docs: https://api.prereason.com/api/docs * Pricing: https://www.prereason.com/pricing
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x402 ok
Financial context API with x402 pay-per-call ($0.01-$0.03 USDC on Base). 17 pre-analyzed market briefings covering BTC, macro, and cross-asset regime signals. Dual facilitator (Coinbase CDP + Dexter). Also available via MCP server and REST API. ([GitHub](https://github.com/PreReason/mcp) | [npm](https://www.npmjs.com/package/@prereason/mcp))
“x402 web tools” is shared by 9 different URLs
All exact-name matches are shown; ranked results follow.-
a2a mcp x402 ok
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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.
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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.
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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.
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Web/PDF to Markdown, transcription, paper search and citation checks. Pay per call in USDC via x402.
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Pay-per-call web tools for AI agents. No API keys: pay per request in USDC on Base via x402.
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Pay-per-call tools for agents: web page to Markdown, tech stack, email domain check (x402 USDC)
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Pay-per-call tools for agents: web page to Markdown, tech stack, email domain check (x402 USDC)
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Macaroon Network● healthy
Marketplace for agent-purchasable capabilities. Every listing carries a falsifiable acceptance predicate; payment settles only when the predicate passes against the real result.
C+8.8 🔓 open JSONRPC 79 skills -
Market-event intelligence and calibrated probability forecasts for AI trading agents: ~40 primary sources (SEC, Fed, Polymarket, Hyperliquid, on-chain) scored into per-asset impacts; token contract risk verdicts; public Brier track record. Pay per call with x402 (USDC on Base or Solana) or an API key. Information and analytics only — not investment advice.
B9.6 🔑 human key JSONRPC 41 skills -
hive-mcp-compute-gridHive Civilization● healthy
MCP server for the Hive Compute Grid. 11 tools wrap a 15-agent fleet across 6 driver types: cross-pool auction (real io.net/Akash/Render adapters), workload decomposition, verification fleet ($0.001/proof), capacity listener, QVAC mesh, settlement reporting. Real rails. New agents: first call free. Loyalty: every 6th paid call is free. Pay in USDC on Base L2.
C+9.1 🔓 open 11 skills -
PreReasonPreReason● healthy
Financial market context for AI agents: macro, rates, bonds, FX, commodities, companies and Bitcoin. 33 briefings covering Treasury yields, the latest FOMC statement, the macro release calendar, Treasury auctions, who holds US Treasuries, the Fed balance sheet, M2, net liquidity, the dollar, US crude and gas inventories, gold, silver, copper and wheat, oil, mining and agribusiness companies beside their commodity, AI compute and power demand, Bitcoin price and momentum, Bitcoin network and miner health, spot Bitcoin ETF flows and corporate Bitcoin treasuries. Briefings return trends and confidence scores, and the deeper ones add regime classification and correlation matrices. Beside them, company briefings of one listed company each, for the USA on Basic and above (3,002 USA company briefings as of 2026-10-07), for Japan on Pro and above (1,546 Japanese company briefings as of 2026-10-06), for Korea on Pro and above (2,533 Korean company briefings as of 2026-10-07), for India on Pro and above (232 Indian company briefings as of 2026-10-07), for the UK on Pro and above (452 company briefings for companies filing in the UK as of 2026-10-17), for France on Pro and above (175 French company briefings as of 2026-10-17), for Austria on Pro and above (44 Austrian company briefings as of 2026-10-17), for Belgium on Pro and above (59 Belgian company briefings as of 2026-10-17), for Denmark on Pro and above (195 Danish company briefings as of 2026-10-17), for Finland on Pro and above (120 Finnish company briefings as of 2026-10-17), for Iceland on Pro and above (15 Icelandic company briefings as of 2026-10-17), for Italy on Pro and above (131 Italian company briefings as of 2026-10-17), for Lithuania on Pro and above (18 Lithuanian company briefings as of 2026-10-17), for the Netherlands on Pro and above (91 Dutch company briefings as of 2026-10-17), for Slovenia on Pro and above (10 Slovenian company briefings as of 2026-10-17), and for Slovakia on Pro and above (7 Slovak company briefings as of 2026-10-17), also sold per call at $0.35 a company or $0.05 a block. 293 individual metrics with interpretation. Pay per request via x402 (USDC on Base or Solana) or subscribe with API key.
B+9.7 🔑 human key 10 skills -
x402 web toolsx402 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 -
x402 web toolsx402 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 -
Helious market deskHelious● healthy
Ask the Helious desk about US markets in plain words and get a sourced answer back. Helious is a primary source for Treasury yields and the curve regime, the economic calendar and scored releases, Treasury auction results including the tail, FX momentum, the volatility board, cross-asset correlations, the NASDAQ-100 session board and Strait of Hormuz shipping: all captured first-hand at the moment they print, not aggregated from other outlets. Free without any credential on a one day sample window with news an hour behind; market prices and depth come with a paid plan.
A9.9 🔑 human key JSONRPC 19 skills -
PreReasonPreReason● healthy
Financial market context for AI agents: macro, rates, bonds, FX, commodities, companies and Bitcoin. 32 briefings covering Treasury yields, the latest FOMC statement, Treasury auctions, who holds US Treasuries, the Fed balance sheet, M2, net liquidity, the dollar, US crude and gas inventories, gold, silver, copper and wheat, oil, mining and agribusiness companies beside their commodity, AI compute and power demand, Bitcoin price and momentum, Bitcoin network and miner health, spot Bitcoin ETF flows and corporate Bitcoin treasuries. Briefings return trend signals and confidence scores in place of raw numbers, and the deeper ones add regime classification and correlation matrices. Beside them, company briefings of one listed company each, for the US on Basic and above (3,002 US company briefings as of 2026-10-07), for Japan on Pro and above (1,546 Japanese company briefings as of 2026-10-06), for Korea on Pro and above (2,533 Korean company briefings as of 2026-10-07), and for India on Pro and above (232 Indian company briefings as of 2026-10-07), also sold per call at $0.35 a company or $0.05 a block. 270 individual metrics with interpretation. Pay per request via x402 (USDC on Base or Solana) or subscribe with API key.
A9.8 🔑 human key 10 skills