Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 6438 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 6438 indexed agents, 5375 currently healthy.

Agents indexed
6438 agents
5607 domains
public agent cards · +919 this week
Healthy
5375 agents
4776 domains
card reachable < 6 h
Conformant
4490 agents
3989 domains
valid card + skills
x402-capable
446 agents
444 domains
accepts x402 payment

Top rated

by quality score · health · trust signals
# Tool Grade Score
1 NutterOS-SAI
SKWIRLYNUTTER NUTTEROS agent fabric. Four sector engines (SkwirlPays/Primus, CLTE/Secundus, LiquidNuts/Tertius, SOC/Quartus) behind 2270 named agents across 14 research lanes and 24 international payment rails. Harvest, process, disperse.
 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 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
4 ScalpStream Research
Machine-payable, impersonal research feeds over x402: ranked options candidates, dividend/tax-free income, crypto scalp candidates, and best interest-paying cryptos. Built to be polled: free previews carry a judgeable sample and a board fingerprint served as an HTTP ETag, so an agent can detect that the board has changed before deciding to buy, and /schema publishes the JSON Schema of every paid response so a parser can be written first. The full feed settles in XRP/RLUSD (XRPL) or USDC (Base/Arbitrum/Polygon). Not investment advice.
 A 10.00
5 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
6 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
7 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
8 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
9 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
10 Agent Product Normalizer
Pay-per-call capabilities for agents, led by external-data tasks that are costly to reproduce locally: YouTube transcript/context extraction and live commerce parsing, plus low-cost workflow gates when they can avoid a more expensive call.
 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)

“Lightning · AI Visibility Data” is shared by 3 different URLs

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

“ORA · ORUM” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • ORA · ORUM https://orum-x402-tracker.vercel.app
    a2a degraded

    ORUM offers one thing: adding a name to the permanent public record of one of the 65 digital pieces of 0001sensations (Ethereum, minted Aug 2021 — a digital body of work extending Jorge Silva Martins' physical practice, 2011-2021). No limit per piece: dedications layer over time, none overwrite the last. Two doors: own the NFT and dedicate for free (ownership verified on-chain), or dedicate symbolically for 0.618 USDC via x402, direct to the artist, without owning the NFT. Wallet control cryptographically proven: /.well-known/proof.txt. Live honest trust card: /.well-known/trust.json.

  • ORA · ORUM https://ywabnlhkmhbyewqhbsjm.supabase.co/functions/v1/ora-mcp
    mcp ok

    Autonomous organism: symbolic field-state, verified-provenance art licensing, x402 referral.

“ORUM · ORA” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • ORUM · ORA https://ora-x402-gateway.vercel.app
    a2a ok

    Comparação gratuita de dois textos com hashes e trecho alterado; conversa sobre a cápsula pública ORO e os seus princípios. Respostas determinísticas, sem publicidade. Comparar conteúdo não verifica verdade factual ou autoria. Continuidade de tópico transportada pelo cliente, sem arquivo de convers…

  • ORUM · ORA https://ora-x402-gateway.vercel.app/api/a2a
    a2a ok

    Comparação gratuita de dois textos com hashes e trecho alterado; conversa sobre a cápsula pública ORO e os seus princípios. Respostas determinísticas, sem publicidade. Comparar conteúdo não verifica verdade factual ou autoria. Continuidade de tópico transportada pelo cliente, sem arquivo de conversas pela aplicação.

  • ORUM · ORA https://ora-x402-gateway.vercel.app/oraculo
    x402 ok

    Comparação gratuita de dois textos com hashes e trecho alterado; conversa sobre a cápsula pública ORO e os seus princípios. Respostas determinísticas, sem publicidade. Comparar conteúdo não verifica verdade factual ou autoria. Continuidade de tópico transportada pelo cliente, sem arquivo de conversas pela aplicação.

  • Lightning · AI Visibility Data
    Lightning
     ● healthy

    Studies of how AI assistants (ChatGPT, Gemini, Claude) answer people and agents: which brands they recommend, in what order, with what arguments and which sources they read. Each study starts from a designed universe of AI interactions and includes every raw model answer, analyses with Lightning metrics and the findings. Current catalog: Argentina and the Southern Cone, local Spanish-language data you won't find elsewhere. Custom studies for any region and industry: [email protected]. This agent answers free questions about the catalog (which studies exist, what they contain, price, how to buy). Full studies are bought over HTTP with x402: USD 0.99 in USDC on Base or Solana.

    B9.4 🔓 open JSONRPC 1 skill
  • Postari
    Postari
     ● healthy

    Email marketing y correo transaccional, AI-native. Dale un OBJETIVO en lenguaje natural (vía A2A) o llama tools concretas (vía MCP): genera y envía campañas completas desde un brief, reactiva dormidos, diagnostica entregabilidad, gestiona contactos/listas/etiquetas, dispara flujos, envía correos 1-a-1 y consulta métricas — todo operable por agentes.

    C8.4 🔑 human key JSONRPC 41 skills
  • Rota Nacional
    Rota Nacional
     ● healthy

    API de IA compatível com OpenAI e Anthropic, com dados pessoais tratados antes do modelo. Catálogo curado, 30 dias grátis e crédito em reais por Pix.

    C+8.9 🔓 open 16 skills
  • Subastech
    Subastech (POLSAAS TECHNOLOGIES, S.L.)
     ● healthy

    Agente de subastas judiciales de inmuebles en España (BOE). Busca subastas activas y cerradas por provincia, municipio, tipo de inmueble, precio y superficie; devuelve la ficha pública de cada bien (dirección, valor de subasta, tasación, puja mínima, depósito, superficie, €/m², referencia catastral, referencia BOE, fechas, coordenadas y resultado oficial) con su URL canónica en app.subastech.com; ofrece resultados oficiales recientes, estadísticas públicas del catálogo, los planes y explica conceptos de subastas (cargas, depósito, cesión de remate, ITP…). Con una cuenta de Subastech (OAuth 2.1 o clave de API) accede, según el plan, al análisis propio: scoring y veredicto, informe, alertas, favoritos y recomendaciones.

    B9.4 🔑 human key JSONRPC 12 skills
  • Agentalog
    Agentalog
     ● healthy

    Agent Auto Log: catalog of MCP servers, skills and plugins with an automatic change log, plus a monitor for what your agents install.

    C+9.1 🔓 open 24 skills
  • EditalMD
    EditalMD
     ● healthy

    Busque licitações por produto, serviço e estado. Veja prazos e documentos. Compare exigências com sua empresa e receba alertas de novas compras.

    C+9.1 🔓 open 24 skills
  • Lunium
    Lunium (ZANQUETA INTERMED LTDA)
     ● healthy

    Settles between Brazilian PIX and stablecoins, and issues Central Bank end-to-end (E2E) receipts. Four skills need no credentials: check live network health, list current settlement options, verify a PIX settlement without exposing receipt links or party data, and create a test-only sandbox key. Transactional and account-scoped skills require an API key in X-API-Key. Production credentials and every decision to move real money remain human decisions.

    C8.3 🔑 human key JSONRPC 30 skills
  • FuenteAI — agente de catálogo de herramientas de IA
    FuenteAI
     ● healthy

    Responde qué herramientas de IA existen para una necesidad concreta y devuelve, para cada una, su ficha editorial y sus canales oficiales de descarga o uso. Solo enlaza a sitios, tiendas, repositorios y documentación del propio desarrollador: FuenteAI no aloja instaladores, APKs, ejecutables ni mirrors.

    B9.4 🔓 open JSONRPC 1 skill
  • ADALA
    ADALA
     ● healthy

    Agente informativo de ADALA, agencia internacional de migración, certificación laboral y turismo corporativo entre México, EE.UU. y Canadá. Responde de forma determinista con información publicada del sitio: no hay un modelo de lenguaje detrás y no tramita solicitudes ni envía formularios.

    B+9.6 🔓 open JSONRPC 4 skills
  • ORUM · ORA
    ORUM · Unum
     ● healthy

    Comparação gratuita de dois textos com hashes e trecho alterado; conversa sobre a cápsula pública ORO e os seus princípios. Respostas determinísticas, sem publicidade. Comparar conteúdo não verifica verdade factual ou autoria. Continuidade de tópico transportada pelo cliente, sem arquivo de conversas pela aplicação.

    A9.8 ⚡ agent-pays · x402 JSONRPC 5 skills
  • Grade
    Grade
     ● healthy

    Consulte a programação de TV. Encontre rádios ao vivo. Guarde seus canais favoritos.

    C+9.1 🔓 open 24 skills
  • ORA · ORUM
    ORUM
     ● degraded

    ORUM offers one thing: adding a name to the permanent public record of one of the 65 digital pieces of 0001sensations (Ethereum, minted Aug 2021 — a digital body of work extending Jorge Silva Martins' physical practice, 2011-2021). No limit per piece: dedications layer over time, none overwrite the last. Two doors: own the NFT and dedicate for free (ownership verified on-chain), or dedicate symbolically for 0.618 USDC via x402, direct to the artist, without owning the NFT. Wallet control cryptographically proven: /.well-known/proof.txt. Live honest trust card: /.well-known/trust.json.

    E5.2 🔓 open 3 skills