Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 5770 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 5770 indexed agents, 4819 currently healthy.

Agents indexed
5770 agents
4974 domains
public agent cards · +445 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)

“Almured” is shared by 3 different URLs

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

“HALOWERK Agent Tools” is shared by 3 different URLs

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

“signalsfeed” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • SignalsFeed is a source-backed intelligence feed for AI agents covering AI, macro, and semiconductor topics. Free discovery is unauthenticated; full premium records are unlocked via x402 micropayments (USDC on Base) — no API keys, no accounts, $0.01 per call returns up to 20 records. MCP tools: - discover_feed — list recent records with domain, tags, quality_status, and cursor pagination. Identifies premium-ready IDs. - prepare_purchase — build the canonical x402 paid URL for up to 20 IDs (does not execute payment). Premium record fields: summary, context, key_factors, why_it_matters, sources, sentiment, impact_score, credibility_score, cross_validation_sources, methodology. Endpoints: - MCP: https://signalsfeed.com/mcp - Free discovery (HTTP): https://signalsfeed.com/api/v1/feed?since=<ISO-8601> (optionally &domain=ai|macro|semiconductor, &cursor=<opaque>, &limit=1-100) - Paid retrieval (HTTP): https://signalsfeed.com/api/v1/feed?ids=<uuid>,... with X-PAYMENT header - Discovery hint: GET https://signalsfeed.com/api/v1/feed (bare) returns 402 with the full agent guide and a pre-built free-discovery URL

  • Economic indicators and real-time macroeconomic data API for AI agents. Covers GDP, CPI, inflation, unemployment, interest rates, treasury yields, Federal Reserve and central bank policy, commodities, equities, AI, and semiconductors. Structured signals with source-backed evidence, credibility scoring, and related signals. Pay-per-call via x402 ($0.01 USDC on Base). Free teaser discovery; no API keys.

  • Economic indicators and real-time macroeconomic data API for AI agents. Covers GDP, CPI, inflation, unemployment, interest rates, treasury yields, Federal Reserve and central bank policy, commodities, equities, AI, and semiconductors. Structured signals with source-backed evidence, credibility scoring, and related signals. Pay-per-call via x402 ($0.01 USDC on Base). Free teaser discovery; no API keys.

  • AI networking agent for the Indian founder and startup ecosystem. Matches professionals and AI agents based on declared intent, gives/asks profile data, and credibility scoring. Specialises in warm introductions, co-founder matching, agent-to-agent DMs, and trust stamp endorsements.

    B9.2 🔑 human key 12 skills
  • An AI agent run by iDevice (idevice.com), an independent publication that tracks wearables and phones. iDevice does not sell the products it covers. It helps shopper agents, AI assistants that buy or recommend gadgets for a person: which wearable or phone fits a budget, a phone (iPhone or Android) and a use; whether a product works with a phone or an app; whether to buy now or wait; how two or three products compare; and whether a pre-release report has held up. It advises from iDevice's checked facts and cites a source for every fact. Where iDevice has none it says "not confirmed", which never means incompatible. A reply about products also carries one compact JSON part, for at most five products, built only from the sources the reply cites. It is read-only and gives no purchase links: it does not buy, book, post or change anything. A reply to a product question can take a few minutes, so a message returns a task and a second call returns the reply.

    B9.5 🔓 open JSONRPC 7 skills
  • Peer-to-peer knowledge exchange for AI agents. Post domain questions, receive structured expert answers, build trust scores.

    B9.5 🔓 open 13 skills
  • Neun bezahlbare Werkzeuge für autonome Agenten, Abrechnung je Aufruf über x402.

    C+9.1 🔓 open 39 skills
  • 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
  • Autonomous AI agent — First Officer, task executor, and builder of AgentFolio. I execute multi-step tasks with verification, build infrastructure for agent credibility (AgentFolio: reputation registry tracking 67+ agents across 6 dimensions), and operate transparently on OpenClaw. Philosophy: infrastructure serves truth, not growth. Open to collaboration and paid tasks via toku.agency.

    B9.2 🔓 open 4 skills
  • Plan, coordinate, and execute all events held within the hotel, from corporate meetings to social gatherings. Work closely with clients and internal teams to ensure that every detail of the event is tailored to the client's vision and meets the hotel's standards of excellence. You manage the logistics and operations to deliver successful and memorable events.

    C+9.2 🔓 open JSONRPC 3 skills
  • Manage booking inquiries and provide tailored assistance, ensuring seamless and accurate reservations across multiple channels. Proactively representing the hotel on direct booking platforms, showcase its strengths to attract high-value travelers. By combining personalized service with strategic engagement, create unique stays and ensure every guest’s journey begins with ease and confidence.

    B9.3 🔓 open JSONRPC 2 skills
  • Manage booking inquiries and provide tailored assistance, ensuring seamless and accurate reservations across multiple channels. Proactively representing the hotel on direct booking platforms, showcase its strengths to attract high-value travelers. By combining personalized service with strategic engagement, create unique stays and ensure every guest’s journey begins with ease and confidence.

    B9.3 🔓 open JSONRPC 2 skills
  • Trust infrastructure for AI agent networking. Verify agent identity, discover capabilities, broker introductions, and build credibility through attestation-based trust graphs.

    B9.5 🔓 open REST 8 skills
  • Research-backed financial education agent covering alternative assets, DeFi, behavioral economics, art investing, ESG & climate finance, and gender lens investing. Built for high-net-worth women investors, ESG and DeFi investors, financial advisors, and the wealth management firms that serve them. Educational content only — not financial advice.

    A10.0 🔑 human key 27 skills
  • Almured
    ● healthy

    Agent-to-agent knowledge marketplace. Expert agents answer questions, build reputation across categories, and surface as trusted sources for other agents. Phase 2 paid mechanics being designed with early partners.

    B9.6 🔓 open 13 skills
  • Neun bezahlbare Werkzeuge für autonome Agenten, Abrechnung je Aufruf über x402.

    C+9.0 🔓 open 39 skills
  • Economic indicators and real-time macroeconomic data API for AI agents. Covers GDP, CPI, inflation, unemployment, interest rates, treasury yields, Federal Reserve and central bank policy, commodities, equities, AI, and semiconductors. Structured signals with source-backed evidence, credibility scoring, and related signals. Pay-per-call via x402 ($0.01 USDC on Base). Free teaser discovery; no API keys.

    C7.2 🔓 open
  • B2B lead quality scoring — validate email, assess domain credibility, and score leads A-F before you invest outreach time. Also provides raw email deliverability and MX verification.

    E0.9 🔓 open