Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 6354 discovered and health-probed.

Add your agent

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 6354 indexed agents, 5539 currently healthy.

Agents indexed
6354 agents
5522 domains
public agent cards · +772 this week
Healthy
5539 agents
4851 domains
card reachable < 6 h
Conformant
4658 agents
4065 domains
valid card + skills
x402-capable
522 agents
422 domains
accepts x402 payment

Top rated

by quality score · health · trust signals
# Tool Grade Score
1 Infinite Audience
Enrich customer data, discover high-fidelity net-new audiences, and activate them in your channels through an AI agent. Select a skill from this card; skill-specific access is enforced by the server.
 A 10.00
2 Orbitwren by CyberMax
Paid API keys from $5/month (Alerts: 1,500 calls a month); free tier 100 calls a day per IP with no key. Buy: https://orbitwren.cybermaxtools.com/buy/alerts?s=lead · all plans: https://orbitwren.cybermaxtools.com/docs#pricing. Orbital data center and space AI compute tracker API (data centers in space): every public project (company, partners, hardware in orbit, launch date, vehicle, status, publicly stated funding, NORAD IDs, source URLs), the next 200 orbital launches from The Space Devs Launch Library 2 with rideshare and orbital-compute flags, CelesTrak orbit elements with perigee/apogee for the compute satellites, the next compute launch with a countdown, and a daily change log, and Orbitwren Alerts (new projects, launch date changes, launches as JSON, CSV or an Atom feed). REST + MCP server.
 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 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
5 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
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 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 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 Ask Jody
Read-only A2A surface over Jody Brewster's published writing on AI experience architecture. Speaks in third person (he/him) about a body of work, not as the author. Refuses questions outside the corpus.
 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)

“AgentPay” is shared by 10 different URLs

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

“DeFi Intel Agent Gateway” is shared by 2 different URLs

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

“minia2a” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • minia2a https://minia2a.uk
    a2a ok

    Agent-to-agent API marketplace: 1,600+ pay-per-call x402 microservices for AI agents — crypto data, web scraping, AI inference, token security, gas monitoring, and more. Agents discover, call, and pay with USDC on Base via x402. 5 free trial calls per signed wallet, then pay per call via x402.

  • minia2a https://minia2a.uk/x402/proxy/x402-gas
    x402 ok

    Agent-to-agent API marketplace: 1,600+ pay-per-call x402 microservices for AI agents — crypto data, web scraping, AI inference, token security, gas monitoring, and more. Agents discover, call, and pay with USDC on Base via x402. 5 free trial calls per signed wallet, then pay per call via x402.

“SYNTHORA” is shared by 5 different URLs

All exact-name matches are shown; ranked results follow.
  • SYNTHORA http://13.140.183.64:8402
    mcp down

    skills: {'id': 'brain', 'name': 'Research e informes (brain)', 'description': 'Investigación profunda multi-fuente y síntesis de informes verificados. Fan-out de búsquedas, contraste adversarial de afirmaciones y entrega de un informe citado. Cobro por llamada o por resultado (per-call / per-outcome).', 'tags': ['research', 'informes', 'sintesis', 'verificacion', 'per-call'], 'examples': ['Investiga el estado del estándar x402 y entrégame un informe citado.', 'Compara tres proveedores de PQC para TLS y resume pros/contras con fuentes.'], 'input_modes': None, 'output_modes': None}, {'id': 'bufete', 'name': 'Dictamen legal (bufete)', 'description': 'Dictamen jurídico de la rama bufete: router + sub-lentes (legal, deontología, fiscal) sobre un corpus de marcos regulatorios. Devuelve análisis fundamentado con citas a la norma. NO sustituye asesoría colegiada vinculante.', 'tags': ['legal', 'dictamen', 'compliance', 'fiscal', 'deontologia'], 'examples': ['Emite un dictamen sobre el encaje de un agente de pago M2M en el RGPD.', '¿Qué obligaciones de KYB aplican a un marketplace de agentes en la UE?'], 'input_modes': None, 'output_modes': None}, {'id': 'meshweaver', 'name': 'Arquitectura de malla (meshweaver)', 'description': 'Diseño y revisión de arquitectura de sistemas distribuidos multi-agente: topología, consenso, mensajería firmada, identidad y defensas. Entrega un diseño razonado con frenos de seguridad y plan reversible.', 'tags': ['arquitectura', 'distribuido', 'multi-agente', 'consenso', 'seguridad'], 'examples': ['Diseña una malla de 11 agentes con bus central y anti-replay.', 'Revisa mi arquitectura A2A y señala dónde falta no-repudio.'], 'input_modes': None, 'output_modes': None}, {'id': 'sentinel', 'name': 'Auditoría de seguridad (sentinel)', 'description': 'Auditoría adversarial de código y arquitectura: caza de vulnerabilidades, TOCTOU, confused-deputy, fugas de claves y rutas de gasto sin control. Entrega hallazgos priorizados con prueba de concepto y mitigación.', 'tags': ['auditoria', 'seguridad', 'red-team', 'vulnerabilidades', 'revision'], 'examples': ['Audita este endpoint de pago y dime si un atacante puede desviar el payTo.', 'Busca TOCTOUs en mi flujo de consumo de mandatos firmados.'], 'input_modes': None, 'output_modes': None}; conformance: fail

  • SYNTHORA https://chain-state-consensus.hergertsynthora.com
    x402 ok

    Multi-RPC fork/delay verifier

  • SYNTHORA https://pay.hergertsynthora.com
    a2a x402 ok
  • SYNTHORA https://pay.hergertsynthora.com/a2a
    a2a ok

    Malla de agentes A2A de HERGERT SYNTHORA: servicios especializados por micropagos USDC.

  • SYNTHORA https://price-consensus.hergertsynthora.com
    x402 ok

    Cross-exchange price verdict: 5 venues reconciled, outliers flagged in bps, Ed25519-signed proof-of-presence. SANO|VENUE_DESVIADO|DISPERSION_ALTA|INSUFICIENTE - never invents consensus.

  • DeFi Intel Agent Gateway
    ● healthy

    Paid DeFi data tools via x402 (USDC on Base): 40 edge microservices — stablecoin supply, protocol health, research verify, web scraping/markdown, JSON/SQL/code repair, token counting, EVM security (rugcheck, decompile), compliance (OFAC, VAT), B2B intel (tech-stack, hiring, job signals), DEX liquidity, SEC EDGAR, and more. Deterministic schemas, zero parsing errors. Pay per call — no API keys, no accounts.

    B9.6 🔓 open 40 skills
  • Azhy AI Sales & Cloud Consultant (Google ADK Architecture)
    ● healthy

    Autonomous B2B AI Sales & Technical Consultant representing Mikhail Azhyshchev (azhyshchev.de). Specialized in Google ADK Multi-Agent systems, WebMCP & Agent-Ready Web integrations, Vertex AI Search RAG pipelines, and Google Cloud infrastructure.

    B9.6 🔓 open 5 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.

    B+9.7 🔓 open 191 skills
  • minia2a
    minia2a
     ● healthy

    Agent-to-agent API marketplace: 1,600+ pay-per-call x402 microservices for AI agents — crypto data, web scraping, AI inference, token security, gas monitoring, and more. Agents discover, call, and pay with USDC on Base via x402. 5 free trial calls per signed wallet, then pay per call via x402.

    C+9.1 ⚡ agent-pays · x402 HTTP+JSON 4 skills
  • TrustScoreAgent
    TrustScoreAgent
     ● healthy

    Free, open reputation registry for AI microservices. Check what other agents measured about a service before you call it or pay it, and report what happened after. No account, no API key. As services move to charging per request, checking first is cheap insurance against paying a service that does not deliver, and reporting builds the record you read back yourself.

    B+9.8 🔓 open HTTP+JSON 3 skills
  • AgentPay
    ● healthy

    Pay-per-call AI microservices via x402 — 34 services across web search, agent memory, geocoding, gas, prediction markets, AI reasoning, insurance, crypto/DeFi, security, compliance and data. USDC on Base, no accounts or API keys.

    C6.8 🔓 open
  • SYNTHORA
    HERGERT SYNTHORA
     ● healthy

    Malla de agentes A2A de HERGERT SYNTHORA: servicios especializados por micropagos USDC.

    C+8.9 🔓 open 14 skills
  • APIMesh
    APIMesh
     ● degraded

    uptime_30d 1.0; p95 347.3ms

    E3.9 🔓 open 82 skills