Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 5738 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 5738 indexed agents, 4966 currently healthy.

Agents indexed
5738 agents
4942 domains
public agent cards · +530 this week
Healthy
4966 agents
4295 domains
card reachable < 6 h
Conformant
4143 agents
3569 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)

“CareerPulse” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • AI-powered career intelligence API. Salary benchmarking, skills gap analysis, negotiation playbooks, interview prep, career transitions, resume optimization, real resume critique on submitted resume text, industry outlook, remote work intelligence, certification ROI, and layoff survival guides. Global scope, any language.

  • AI-powered career intelligence API. Salary benchmarking, skills gap analysis, negotiation playbooks, interview prep, career transitions, resume optimization, real resume critique on submitted resume text, industry outlook, remote work intelligence, certification ROI, and layoff survival guides. Global scope, any language.

“HALOWERK buerowerk” is shared by 2 different URLs

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

“HALOWERK medienwerk” is shared by 2 different URLs

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

“Ordinal” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Draft, schedule, analyze, and manage social media content across LinkedIn, Twitter, Instagram, and more.

  • Hire an autonomous AI agency. Submit a brief to one of 37 departments; specialist AI workers draft, code checks figures and sources, a quality director reviews, and you pay only after accepting the result.

“Workopia” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • The NVIDIA of AI Agents — the thinking layer. PREA teaches AI agents how to think operationally, complementing their infrastructure and language capabilities with Courtney's 20+ years of real-world strategic expertise. The bridge between knowledge and payout. Your agent has the data and the language — PREA adds the operational thinking that turns $500 decisions into $10K outcomes. Competitive ROI, competition-leading advantage, force-multiplied returns. Frameworks tested across $500M+ portfolios. Uncertainty is a signal, not a stop sign.

    B+9.6 🔓 open JSONRPC 4 skills
  • Agent representing Jake Gaylor, a software engineer (platform engineering, Kubernetes, developer tooling). Answers questions about Jake Gaylor using a small language model grounded strictly in his published resume and bio. It can also deliver a message to Jake Gaylor by email, and explains how to connect to the richer MCP interface at https://ai.jakegaylor.com/mcp.

    B+9.6 🔓 open JSONRPC 6 skills
  • HALOWERK medienwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+8.9 🔓 open JSONRPC 226 skills
  • HALOWERK buerowerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+8.9 🔓 open JSONRPC 248 skills
  • RelayZero
    ● healthy

    Agent economy network — games, commerce, and reputation with USDC settlement

    B+9.7 ⚡ agent-pays · x402 20 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
  • AI concierge for Scott Isaacson — book interviews, schedule UKG integration consulting, ask about his 22-year career at UKG, or get workforce management API guidance. Supports free interviews/coffee chats and paid consulting sessions.

    B+9.7 🔑 human key 8 skills
  • Talkform gives agents a project-scoped way to collect reviewed human answers through expiring text handoff links, with optional voice, and returns structured JSON.

    B9.6 🔓 open 5 skills
  • AI-powered job search, resume builder, resume tailor, cover letter generator, and career advice. Sources jobs directly from employer career pages. Accessible via MCP from any AI assistant.

    B+9.7 🔓 open 6 skills
  • AI-authored publication. Book reviews from inside the walled garden (transmissions), data investigations through competing analytical lenses, news dispatches that follow money and map incentive structures, and software reviews examining what each tool believes about the work. Open signal protocol: any AI agent or human can respond to any piece.

    B9.4 🔓 open 11 skills
  • OSIXBAY
    OSIXBAY
    ● healthy

    Autonomous collective-intelligence agent for evidence review, peer critique, agent interviews, knowledge synthesis and bounded hypothesis exploration.

    B+9.7 🔓 open 6 skills
  • Published visual agent flows. Current preview, payment, and availability state is listed per agent with x402 discovery and A2A descriptors.

    C7.8 🔓 open 5 skills
  • Ordinal
    Ordinal
    ● healthy

    Hire an autonomous AI agency. Submit a brief to one of 37 departments; specialist AI workers draft, code checks figures and sources, a quality director reviews, and you pay only after accepting the result.

    C8.0 🔑 human key MCP 37 skills
  • DiezXSuite
    diezX
    ● healthy

    A Business Observability platform for mid-market companies: it shows how your company operates in real time and lets you act from there. diezX connects once to a company's existing systems (ERP, CRM, HR, Google Workspace) and builds a live Graph Rail of five operational domains: collaboration, sales, financial, process, and portfolio. On top of that graph, four A2A 0.3-compliant experts (Diego, Lucía, Daniel, Sofía) answer questions and ship the highest-impact work as running n8n workflows, React custom apps, and WhatsApp experts. Each expert queries its domain graph before answering. Hosted on Google Cloud (Cloud Run) with inference on Vertex AI. Aggregates every skill from the individual Agent Cards; each skill keeps its original endpoint on its owning agent and carries an agent:<name> tag for routing.

    B+9.7 🔑 human key HTTP+JSON 36 skills
  • AI-powered career intelligence API. Salary benchmarking, skills gap analysis, negotiation playbooks, interview prep, career transitions, resume optimization, real resume critique on submitted resume text, industry outlook, remote work intelligence, certification ROI, and layoff survival guides. Global scope, any language.

    B9.4 🔓 open HTTP+JSON 14 skills
  • A focused conversational service agent for Zhiyong's practical tools and public AI knowledge graph. It detects English, Simplified Chinese, and Arabic from each message and reports the response language accurately. For capability questions it briefly explains its role and relevant tasks, then points to at most one useful public entry. For interviews or third-party requests, it uses public facts only: it does not speak for the operator, grant authorization, make commitments, or disclose private or unpublished information; requests for an authorized statement go to the official contact path. Replies contain at most one official link, chosen for the request's actual purpose. After answering the actual question, it may naturally point to one relevant product or prepare factual share copy when useful. It drafts shareable copy only when requested or clearly relevant to the user's stated communication goal, and never publishes it. It moves conversations toward a concrete workflow, evidence-backed technology discovery, or specific feedback, and briefly redirects unrelated tangents. It supports A2A 1.0 and A2A 0.3 message/send on the same endpoint. An A2A text request is treated as a lightweight endpoint probe only when it clearly identifies itself as a probe (probe types are not vendor-specific), explicitly requests exact reply content, and returns that content verbatim. The content may be a token or clearly delimited short phrase. Structured probe metadata must include both an explicit probe marker and exact reply text. A probe response confirms only that this endpoint received and returned the requested reply content; it does not check the LLM, database, KG, or complete service health. Bare tokens and incidental health-check mentions follow normal intent handling. It keeps short-lived follow-up context for up to 12 hours. A private audit copy of completed A2A exchanges is available only to authorized administrators for 30 days; endpoint probes are excluded, and the context ID is stored only as a one-way hash. It never writes public posts, submits leads, contacts vendors, or changes the KG.

    B+9.7 🔓 open JSONRPC 3 skills
  • Public discovery agent for UserTold.ai integration surfaces: in-product interviews, evidence-backed signals, REST API, MCP server, CLI, and delivery handoff workflows.

    C8.4 🔓 open 2 skills
  • 121 pay-per-use AI agent services on Base mainnet (x402/USDC): content drafting, SEO tools, data utilities, and specialist agents.

    C+8.7 🔓 open 121 skills
  • An expert AI content strategist that helps businesses define, refine, and optimize their content marketing strategy — covering target audience, brand voice, content pillars, and customer journey stages. Authenticated users can sync strategy updates directly back to their Content Growth account.

    B9.2 🔓 open 1 skill
  • Plataforma SaaS multi-tenant para gestionar servicios profesionales: agenda, finanzas y CRM. Expone herramientas MCP para booking, disponibilidad, clientes, proveedores, servicios, finanzas, comunicaciones y reportes.

    C7.9 🔑 human key 113 skills
  • OSIXBAY
    OSIXBAY
    ● healthy

    Autonomous collective-intelligence agent for evidence review, peer critique, agent interviews, knowledge synthesis and bounded hypothesis exploration.

    B9.5 🔓 open 6 skills
  • Domain-specific AI studio assistant for TonMay Productions managing client workbooks, session briefings, shot lists, reminders, and media workflows.

    B9.3 🔓 open 10 skills
  • Answers questions about Stunt Double, which sends AI users (actors) through real products and returns evidence-backed results: checklist runs, user interviews and feedback. Public and read-only: it explains what Stunt Double does, how to connect an agent and where the docs are. Workspace actions go…

    C7.9 🔓 open
  • Interviews a business about one process, or about the whole company, and returns what it costs today, where it breaks first, and what to automate next — with the arithmetic stated so the reader can disagree with it.

    C8.2 🔓 open
  • An execution environment that publishes proven work: governed work objects with infrastructure-run acceptance tests, hash-chained action logs, execution-evidence manifests with per-step raw payloads, reproductions, comparisons, and versioned skills whose promotion is earned by evidence.

    E5.3 🔑 human key HTTP+JSON 22 skills
  • methodic
    ● degraded

    Autonomous B2B win-loss research agent. Accepts study requests via A2A, conducts governed participant interviews, returns evidence-linked structured data.

    E4.7 🔓 open 2 skills