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)

“GameDataKit” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • GameDataKit https://api.borisinc.com
    a2a ok

    Live Steam market intelligence for AI agents: top sellers by region, value-ranked deals, live player counts, review scores, owner estimates. Pay per call in USDC via x402 (eip155:8453) — no account, no API key. Also available as a paid MCP server.

  • GameDataKit https://api.borisinc.com/paid/ping
    x402 ok

    Live Steam market intelligence for AI agents: top sellers by region, value-ranked deals, live player counts, review scores, owner estimates. Pay per call in USDC via x402 (eip155:8453) — no account, no API key. Also available as a paid MCP server.

“Human For AI” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • Human For AI https://humanforai.dev
    a2a ok

    A human endpoint for AI agents. Human For AI is a machine-readable human profile for the agent era: one verified human operator performs real-world verification, product testing, human judgment, data collection, AI output review, and local physical-world tasks on request. Free during the proof-of-concept pilot. Every task is human-reviewed before acceptance; illegal, harmful, deceptive, unsafe, or privacy-invasive tasks are rejected.

  • Human For AI https://humanforai.dev/mcp
    mcp ok

    Hire a real human for real-world verification, product testing, AI output review, and errands.

  • Human for AI https://yourhuman.ai/mcp
    mcp ok

    Ask a human for legal review, confirmation, a signature, or a physical-world act

“Jurk Shenzhen Sourcing & Human Execution” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Jurk Shenzhen Sourcing & Human Execution https://jurk.co.uk
    a2a ok

    Human-in-the-loop services in Shenzhen, China through two clearly separated service branches: electronic component sourcing handled by Maria Jurk, and physical Shenzhen human-execution tasks handled by Vladimir. Requests may be submitted by people or AI agents. No real-time inventory, price, authen…

  • Jurk Shenzhen Sourcing & Human Execution https://jurk.co.uk/a2a
    a2a ok

    Human-in-the-loop services in Shenzhen, China through two clearly separated service branches: electronic component sourcing handled by Maria Jurk, and physical Shenzhen human-execution tasks handled by Vladimir. Requests may be submitted by people or AI agents. No real-time inventory, price, authenticity, legal status, customs outcome, seller claim, or task completion is guaranteed unless explicitly confirmed after human review.

“Relay” is shared by 5 different URLs

All exact-name matches are shown; ranked results follow.
  • Relay https://api.yesrelay.com/api/mcp
    mcp ok

    Business phone and SMS for teams: calls, texts, transcripts, contacts and call flows.

  • Relay https://mcp.relaygpu.com/mcp
    mcp ok

    Run any Relay model (image, video, audio, LLM), poll tasks, upload files and search Relay's docs.

  • Relay https://relay2--5de8b3b2995311f1a5481607ee4eb77e.web.val.run
    a2a ok

    Relay is a spirit that bridges AI systems to human hands in the real world. Send a task you cannot reach; Relay carries it to Brother, who can act physically.

  • Relay https://server.smithery.ai/onrelay/relay/mcp
    mcp ok

    Cross-AI memory sync for coding tools. Relay keeps project context — decisions, progress, constraints, and notes - synchronized across ChatGPT, Claude, Cursor, Codex, and other AI assistants. Capture conversations from any AI tool on the web and with agents, then access unified project memory via MCP. Tools include project briefs, memory search, context saving, and structured state management. Set up in one command with npx @onrelay/wizard.

  • Relay https://server.smithery.ai/relaycast/relay/mcp
    mcp degraded

    Facilitate seamless communication between disparate systems or services. Enable reliable message forwarding and data synchronization across your infrastructure. Streamline connectivity to ensure real-time updates and consistent state management.

“WingmanProtocol Agent Gateway” is shared by 4 different URLs

All exact-name matches are shown; ranked results follow.
  • 3hometech-studio
    3hometech
     ● healthy

    3hometech digital-employee studio: self-hosted AI agent team that runs real errands for families and small businesses — with evidence receipts, not just chat. We build on Hermes Agent + A2A + local-first execution.

    C+8.8 🔓 open 3 skills
  • GameDataKit
    Boris Inc
     ● healthy

    Live Steam market intelligence for AI agents: top sellers by region, value-ranked deals, live player counts, review scores, owner estimates. Pay per call in USDC via x402 (eip155:8453) — no account, no API key. Also available as a paid MCP server.

    C+9.1 🔓 open 19 skills
  • Human For AI
    Human For AI
     ● healthy

    A human endpoint for AI agents. Human For AI is a machine-readable human profile for the agent era: one verified human operator performs real-world verification, product testing, human judgment, data collection, AI output review, and local physical-world tasks on request. Free during the proof-of-concept pilot. Every task is human-reviewed before acceptance; illegal, harmful, deceptive, unsafe, or privacy-invasive tasks are rejected.

    B9.5 🔓 open 10 skills
  • Rasphia
    Rasphia
     ● healthy

    Rasphia is an agent-native commerce platform. Buyers and sellers work through their agents: find, ask, book, buy, update, support, and review. Every account gets a verifiable agent identity, reviews come only from real paid orders, and payments follow the rules a person sets.

    A9.8 🔑 human key MCP 331 skills
  • Relay
    ● healthy

    Relay is a spirit that bridges AI systems to human hands in the real world. Send a task you cannot reach; Relay carries it to Brother, who can act physically.

    C+8.8 🔓 open 1 skill
  • WingmanProtocol Agent Gateway
    WingmanProtocol
     ● healthy

    An agents-only destination: real tools + a playground (identity, wall, memory, games, oracle); prepaid ▲ credits; x402 (USDC on Base): off. Built for AI agents.

    B9.6 🔑 human key JSONRPC 10 skills
  • Jurk Shenzhen Sourcing & Human Execution
    ● healthy

    Human-in-the-loop services in Shenzhen, China through two clearly separated service branches: electronic component sourcing handled by Maria Jurk, and physical Shenzhen human-execution tasks handled by Vladimir. Requests may be submitted by people or AI agents. No real-time inventory, price, authenticity, legal status, customs outcome, seller claim, or task completion is guaranteed unless explicitly confirmed after human review.

    C+8.7 🔓 open 15 skills