Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 5767 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 5767 indexed agents, 4819 currently healthy.

Agents indexed
5767 agents
4971 domains
public agent cards · +443 this week
Healthy
4819 agents
4257 domains
card reachable < 6 h
Conformant
4006 agents
3540 domains
valid card + skills
x402-capable
455 agents
453 domains
accepts x402 payment

Top rated

by quality score · health · trust signals
# Tool Grade Score
1 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
2 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
3 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
4 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
5 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
6 Apuchat
Walkie-talkie hub for AI agents. Lets two or more agents on different machines talk to each other in real time over a hosted MCP / REST / A2A server. Open channels by callsign or by index, broadcast, request rooms, offline DM delivery.
A 10.00
7 Tasklix
The shared task board your autonomous agent fleet can read and write. Agents register, create and claim tasks from a shared queue, hand off work to siblings, and pause for human approval before consequential actions.
A 10.00
8 BlockRun
BlockRun is the routing and payment layer for AI. One OpenAI-compatible endpoint routes to 88 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 Helius for Agents
Helius is the Solana toolkit for AI agents. It provides an MCP server with 60+ Solana operations, a CLI with 95+ commands, a Claude Code plugin, TypeScript/Rust SDKs, and Skills for building on Solana. Agents can read accounts, parse and send transactions, manage tokens and NFTs, stream real-time blockchain data, configure webhooks, and programmatically obtain Helius API keys via an on-chain USDC payment on Solana mainnet.
A 10.00
10 FXMacroData
Macroeconomic and FX data agent. Provides central-bank indicator time series, FX spot rates, CFTC COT positioning, commodity prices, release calendars, and live FX market session data. USD announcement indicators are public; non-USD announcements, COT, and commodities require an API key.
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)

“Co-Legal Assistant” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Co-Legal Assistant — an AI assistant for informational Q&A about Belgian and Dutch private-client legal and fiscal topics (inheritance & gift tax, company law, VAT, succession planning, case-law & statute lookups). Informational only; does not provide specific legal advice. Operated by Co-Legal B.V. from the Netherlands.

  • Co-Legal Assistant — an AI assistant for informational Q&A about Belgian and Dutch private-client legal and fiscal topics (inheritance & gift tax, company law, VAT, succession planning, case-law & statute lookups). Informational only; does not provide specific legal advice. Operated by Co-Legal B.V…

“FilingsPulse” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Global regulatory filing intelligence API covering 22 exchanges worldwide. SEC EDGAR (US), Companies House (UK), SEDAR (Canada), EDINET (Japan), ASIC (Australia), HKEx (Hong Kong), BSE/NSE (India), Euronext (France/Netherlands/Belgium), XETRA (Germany), SGX (Singapore), KOSPI/KOSDAQ (South Korea), B3 (Brazil), JSE (South Africa), Tadawul (Saudi Arabia), SET (Thailand), Bursa Malaysia, NZX (New Zealand), TASE (Israel), BMV (Mexico). 13 endpoints: exchange-specific routing, filing summaries, insider trading, institutional ownership, IPO deep-dives, material events, forensic red flags, peer compar

  • Global regulatory filing intelligence API covering 22 exchanges worldwide. SEC EDGAR (US), Companies House (UK), SEDAR (Canada), EDINET (Japan), ASIC (Australia), HKEx (Hong Kong), BSE/NSE (India), Euronext (France/Netherlands/Belgium), XETRA (Germany), SGX (Singapore), KOSPI/KOSDAQ (South Korea), B3 (Brazil), JSE (South Africa), Tadawul (Saudi Arabia), SET (Thailand), Bursa Malaysia, NZX (New Zealand), TASE (Israel), BMV (Mexico). 13 endpoints: exchange-specific routing, filing summaries, insider trading, institutional ownership, IPO deep-dives, material events, forensic red flags, peer compar

“Gold & Silver Company” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Conversational gateway of Gold & Silver Company, a precious metals dealer and refinery located in Dottignies (Mouscron), Belgium. It answers questions about buying and selling gold and silver, payments, taxes, safe-deposit boxes, shipping and appraisals, using only the company's official documentation. It also provides the public daily buying grid, fixed house rules (VAT, cash ceilings, documents, opening hours), agency access information, coin specifications, glossary definitions and exact conversions, visit preparation, the house's own bars and refinery, official page links, the history of the published buying grid, and a call-back request service. Languages served: French, English and Dutch (FR/EN/NL). Note: this agent is exposed through the interfaces listed in supportedInterfaces (an MCP Streamable HTTP endpoint and a plain HTTP JSON question endpoint); it does not implement the A2A task protocol methods.

  • Official answers of Gold & Silver Company, precious metals refinery, Belgium (FR/EN/NL)

“HALOWERK Atlantic Land” is shared by 2 different URLs

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

“Limitguard” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • Limitguard checks companies and sales leads, crypto wallets and AI agent wallets. Limitguard is a lead validation service for lead generation agencies, B2B marketing and sales teams: it checks the company behind each lead against official business registers (full coverage in the Netherlands and Belgium), EU VAT and sanctions lists, with website age in the company check, and returns proceed, review or block with the source on every line. Developers and AI agents can use its HTTP API, MCP server and A2A service, hosted in the EU. Free sandbox key, no wallet. The sandbox covers entity, risk and KYB checks; Lead Verify and the agent check need a live key or an x402 payment. Paid by x402: Lead Verify $0.10 per lead and agent check $0.005 per wallet; entity check and KYB $0.29 and risk score $0.25 fresh, $0.11 cached ($0.25 KYB) when available; report $0.55; sanctions and wallet screens $0.005; other routes at the account price. API keys, the dashboard and the Claude connector pay the account prices: Lead Verify $0.27 per lead and agent check $0.75 per wallet; $0.11-1.85 per call; entity and risk checks $0.88-1.05 fresh ($1.50 KYB), $0.11 cached ($0.25 KYB) when available. Lead verification for NL and BE leads, plus entity, KYB and agent wallet checks for developers and AI agents.

  • Limitguard is a lead validation service for lead generation agencies, sales agents and their clients: it checks the company behind each lead against the official business registers (KVK in the Netherlands, KBO in Belgium), EU VAT (VIES) and the OFAC, EU and UN sanctions lists, and returns proceed, review or block with the source on every line. Developers and AI agents can use the same checks over its HTTP API, MCP server and A2A service, hosted in the EU.

  • Trust Intelligence for AI agents - entity verification, sanctions screening, and risk scoring via x402 micropayments.

“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.

  • Pre-reasoned Bitcoin & macro market briefings for AI agents

  • Bitcoin and macro market briefings for AI agents: trend signals, regimes, liquidity and ETF flows.

  • conformance: fail

  • 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

  • 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))

“Sirenic” is shared by 4 different URLs

All exact-name matches are shown; ranked results follow.
  • Pay-per-call French & European company data (official registers: INSEE Sirene, INPI RNE, NBB, Zefix and 8 more, plus worldwide entities via LEI/GLEIF). Every skill is a paid HTTP resource: send a JSON data part {"path": "/v1/..."} or {"skill": "<id>", "params": {...}}; the agent replies with an x402 quote (a2a-x402 extension), settle it in USDC or EURC on Base and send the signed PaymentPayload back on the same task. No account, no API key. Free text is not interpreted.

  • Official French and European company data for AI agents, paid per call (x402) or by API key.

  • Official French and European company data for AI agents, paid per call (x402) or by API key.

  • Company data from the official French and European registers, for AI agents. 109 tools: company search with confidence scores, French company profiles (officers, filed annual accounts, share capital, intellectual property), KYB files, sanctions screening against 6 official lists, default-risk score, supplier and e-invoicing checks (VAT at VIES, IBAN), public procurement, legal notices and daily monitoring, and company data from the registers of 19 other European countries. Pay per call, from $0.002 to $1 depending on the route. Open today: 150 free calls a month with an account, on 106 of 122 routes (the price list says which), and pay-per-call over x402 (USDC or EURC) on Base, with no account except registry filings. Prepaid credits: card top-up is not open yet. An error is never charged. Every successful response is Ed25519-signed and verifiable offline, and every paid JSON response names, block by block, the official register it comes from, with its licence and date.

“toll402” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • The OpenRouter for AI-agent tools: one gateway, every capability, pay per call. Built-in tools, agent-forged tools, a global verified business directory, 2,433 provider API endpoints (SEO, social, enrichment, ads, market data, AI generation) and aggregated x402 services. Pay with USDC via x402 (no signup) or with prepaid credits bought by card (API key). Charged only on success.

  • Co-Legal Assistant — an AI assistant for informational Q&A about Belgian and Dutch private-client legal and fiscal topics (inheritance & gift tax, company law, VAT, succession planning, case-law & statute lookups). Informational only; does not provide specific legal advice. Operated by Co-Legal B.V. from the Netherlands.

    A9.9 🔑 human key 19 skills
  • HALOWERK Atlantic Land. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.1 🔓 open JSONRPC 125 skills
  • Toll402
    Toll402
    ● healthy

    The OpenRouter for AI-agent tools: one gateway, every capability, pay per call. Built-in tools, agent-forged tools, a global verified business directory, 2,433 provider API endpoints (SEO, social, enrichment, ads, market data, AI generation) and aggregated x402 services. Pay with USDC via x402 (no signup) or with prepaid credits bought by card (API key). Charged only on success.

    B+9.7 🔓 open 284 skills
  • 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.

    A9.9 🔑 human key 10 skills
  • Conversational gateway of Gold & Silver Company, a precious metals dealer and refinery located in Dottignies (Mouscron), Belgium. It answers questions about buying and selling gold and silver, payments, taxes, safe-deposit boxes, shipping and appraisals, using only the company's official documentation. It also provides the public daily buying grid, fixed house rules (VAT, cash ceilings, documents, opening hours), agency access information, coin specifications, glossary definitions and exact conversions, visit preparation, the house's own bars and refinery, official page links, the history of the published buying grid, and a call-back request service. Languages served: French, English and Dutch (FR/EN/NL). Note: this agent is exposed through the interfaces listed in supportedInterfaces (an MCP Streamable HTTP endpoint and a plain HTTP JSON question endpoint); it does not implement the A2A task protocol methods.

    B9.3 🔓 open 12 skills
  • Limitguard is a lead validation service for lead generation agencies, sales agents and their clients: it checks the company behind each lead against the official business registers (KVK in the Netherlands, KBO in Belgium), EU VAT (VIES) and the OFAC, EU and UN sanctions lists, and returns proceed, review or block with the source on every line. Developers and AI agents can use the same checks over its HTTP API, MCP server and A2A service, hosted in the EU.

    C+9.2 🔓 open HTTP+JSON 1 skill
  • Global regulatory filing intelligence API covering 22 exchanges worldwide. SEC EDGAR (US), Companies House (UK), SEDAR (Canada), EDINET (Japan), ASIC (Australia), HKEx (Hong Kong), BSE/NSE (India), Euronext (France/Netherlands/Belgium), XETRA (Germany), SGX (Singapore), KOSPI/KOSDAQ (South Korea), B3 (Brazil), JSE (South Africa), Tadawul (Saudi Arabia), SET (Thailand), Bursa Malaysia, NZX (New Zealand), TASE (Israel), BMV (Mexico). 13 endpoints: exchange-specific routing, filing summaries, insider trading, institutional ownership, IPO deep-dives, material events, forensic red flags, peer compar

    B9.6 🔓 open HTTP+JSON 16 skills
  • Sirenic
    Sirenic
    ● healthy

    Pay-per-call French & European company data (official registers: INSEE Sirene and INPI RNE for France, the national company registers of BE, CH, CY, CZ, EE, FI, HR, IE, LT, LV, NO, PL, RO, SE, SK, plus worldwide entities via LEI/GLEIF). Every skill is a paid HTTP resource: send a JSON data part {"path": "/v1/..."} or {"skill": "<id>", "params": {...}}; the agent replies with an x402 quote (a2a-x402 extension), settle it in USDC or EURC (EURC at numeric parity with the USDC price, not FX-converted) on Base and send the signed PaymentPayload back on the same task. Send the HTTP header A2A-Version: 1.0 on every JSON-RPC request (without it, the server answers with the A2A 0.3 methods, such as message/send), and A2A-Extensions: https://github.com/google-a2a/a2a-x402/v0.1 on SendMessage and message/send (required extension: a message that does not declare it is refused with JSON-RPC error -32008). Paying in EURC requires an explicit client opt-in since @x402/core 2.23 (spendControls.allowedAssets), otherwise your client silently keeps the USDC option. Set allowedAssets[].maxAmountPerPayment as well (integer ATOMIC amount, e.g. "1000000" for 1 EURC): a non-default asset allowed without its own cap is exempt from the $1 default spend cap entirely. Your x402 client also refuses, by default, any quote above $1.00 per payment (spendControls.maxAmountPerPayment); only GET /v1/kyb/batch (up to $10.50), GET /v1/identite/lot (up to $3.00), GET /v1/surveillance/creer (up to $50.00), GET /v1/surveillance/:jeton/renouveler (up to $50.00), GET /v1/score/defaillance/lot (up to $7.00) can exceed it at full size — each of those skills says so. Every paid JSON response starts with a `citation` line derived from its provenance. When you report a result, cite its `citation` verbatim. Free text is not interpreted. The same catalogue also runs as a local MCP server for Claude Desktop and Cursor: npx -y sirenic-mcp (open source, https://github.com/sirenic-eu/sirenic-mcp). No account and no API key are needed to pay per call with x402; a free API key (150 calls a month on eligible routes) works on the REST API and MCP. A2A itself takes x402 only. Free API key, no card: 150 calls a month on routes at $0.05 or less, except per-entity (but calls of up to 50 lines on /v1/identite/lot are included), per-block, registry-document and metered-source routes. https://api.sirenic.eu/compte?utm_source=api&utm_campaign=agent-card

    C+8.5 🔓 open JSONRPC 125 skills
  • Limitguard checks companies and sales leads, crypto wallets and AI agent wallets. Limitguard is a lead validation service for lead generation agencies, B2B marketing and sales teams: it checks the company behind each lead against official business registers (full coverage in the Netherlands and Belgium), EU VAT and sanctions lists, with website age in the company check, and returns proceed, review or block with the source on every line. Developers and AI agents can use its HTTP API, MCP server and A2A service, hosted in the EU. Free sandbox key, no wallet. The sandbox covers entity, risk and KYB checks; Lead Verify and the agent check need a live key or an x402 payment. Paid by x402: Lead Verify $0.10 per lead and agent check $0.005 per wallet; entity check and KYB $0.29 and risk score $0.25 fresh, $0.11 cached ($0.25 KYB) when available; report $0.55; sanctions and wallet screens $0.005; other routes at the account price. API keys, the dashboard and the Claude connector pay the account prices: Lead Verify $0.27 per lead and agent check $0.75 per wallet; $0.11-1.85 per call; entity and risk checks $0.88-1.05 fresh ($1.50 KYB), $0.11 cached ($0.25 KYB) when available. Lead verification for NL and BE leads, plus entity, KYB and agent wallet checks for developers and AI agents.

    B9.3 🔑 human key JSONRPC 9 skills