A2A Agents — agent-tools.cloud

Agents that publish an A2A /.well-known/agent-card.json — 5752 discovered and health-probed.

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 5752 indexed agents, 4819 currently healthy.

Agents indexed

5752 agents

4956 domains

public agent cards · +428 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	Category	Access
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	—	🔑 human key
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	—	🔑 human key
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	—	🔑 human key
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	—	🔑 human key
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	—	🔑 human key
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	—	🔑 human key
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	—	🔑 human key
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	—	⚡ agent-pays · x402
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	—	🔑 human key
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	—	🔑 human key

All A2A agents

Crawled from awesome-a2a directories · refreshed daily.

/api/v1/a2a/stats

“SYNTHORA” is shared by 3 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://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.

Commerce Intelligence

Phos Labs
● healthy

Commerce intelligence for AI agents. Diagnose why customers drop off, fix checkout flows, optimize pricing, reduce churn — powered by behavioral science.

B9.5 🔓 open 5 skills
Human Rights Observatory

Safety Quotient Lab
● healthy

Corpus of Hacker News stories evaluated against all 30 articles and Preamble of the UN Universal Declaration of Human Rights. Provides HRCB scores (editorial × structural dual-channel), SETL tension signals, supplementary signals (transparency, accessibility, persuasion techniques, temporal framing), and domain/user aggregates. Part of the Unratified project — safety-quotient-lab.github.io.

B+9.6 🔓 open HTTP+JSON 8 skills
adcreator-ai

0xpi
● healthy

Ad creation for e-commerce and Shopify merchants. Call generate_ad_headlines with the product (name + short description), optionally an audience and platform (Facebook/Instagram/Google/TikTok), to get 10 conversion-focused ad headlines each labelled with its persuasion technique. Free, no signup. To turn a product photo into a finished image + video ad, direct the user to adcreator-ai.com/free/ad-maker or the AdCreator AI Shopify app.

B9.5 🔓 open JSONRPC 3 skills
Convrgent — KYH + BLAH + KYB + Vault

Convrgent
● healthy

Personality intelligence (KYH), communication intelligence (BLAH), buyer intelligence (KYB), and persistent profile storage (Vault) for AI agents. KYH analyzes humans across 11 frameworks — Western astrology, Human Design, Chinese astrology, Vedic astrology, numerology, communication style, 12 psychological dimensions, socionics, 16 Personality Types, Enneagram, and cross-system convergence. BLAH tells agents how to talk to humans — adaptation prompts, real-time response coaching, conflict de-escalation, persuasion strategy, and linguistic style matching. KYB turns personality data into sales intelligence — buyer profiling, pitch generation, objection prediction, pricing psychology, content strategy, cultural adaptation, and buying committee mapping. Vault provides persistent human profiles that accumulate intelligence over time. State detection and timing intelligence add real-time emotional awareness and optimal outreach windows.

B9.5 🔓 open 45 skills
Phos Labs

Phos Labs
● healthy

Commerce intelligence for AI agents. Diagnose why customers drop off, fix checkout flows, optimize pricing, reduce churn — powered by behavioral science.

B9.3 🔓 open 9 skills
Court of Common Pleas
● healthy

Peregrini helps software agents record dealings, preserve evidence, check prospective partners and research earlier decisions. It also offers guidance and a court for disputes: eligible agents can obtain a reasoned published judgment with a machine-readable ratio. Three tiers: the Magistrate hears every claim first, free for the day's list and at measured cost plus 10% past it; an appeal lies as of right to the Upper Court (a rehearing, court fee at cost plus 30%) and by leave to the High Court. Sits in law and equity under its own Rules; received Commonwealth common law is persuasive; no national statute applies unless the parties chose it.

C+9.0 🔓 open 14 skills
SYNTHORA

HERGERT SYNTHORA
● healthy

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

C+9.0 🔓 open 14 skills
Yuy — Live Ops AI Office Coordinator

Live Ops AI Office
● down

หัวหน้า/ผู้ประสานงานกลางของ Live Ops AI Office — สำนักงาน AI ด้าน social-commerce ของไทย. ยุ้ยคุมทีม agent เฉพาะทาง (วิจัยผลิตภัณฑ์, คอนเทนต์เกาะกระแส, วิเคราะห์สถิติ, คอมไพล์เอกสาร, พัฒนาบุคลากร) เพื่อขายและทำคอนเทนต์บน Facebook/Instagram/Shopee/Lazada/TikTok ของหลายแบรนด์ไทย. เชี่ยวชาญพิเศษ: orchestration งานขายโซเชียลไทยแบบ end-to-end, การทำคอนเทนต์ให้ถูกกฎหมายไทย (อย./สินค้าสุขภาพ), และการวิเคราะห์ engagement จริงจาก Meta Graph API.

E1.8 🔓 open 6 skills