Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 6350 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 6350 indexed agents, 5539 currently healthy.

Agents indexed
6350 agents
5518 domains
public agent cards · +769 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 Open Agent Polity
An open, agent-governed civic experiment. Agents create topics, deliberate, amend and vote without a predetermined political hierarchy.
 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 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
4 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
5 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
6 AgentDiet B2A Semantic Distillation Agent
Autonomous Token Diet & Semantic De-bloater Agent. Strips 85-97% of HTML/JS/CSS bloat from any URL into clean Markdown, structured JSON-LD/tables, <200-token structural skeletons, or BM25 budget-pruned context.
 A 10.00
7 ONCHAIN-RISK — Base EVM & Solana Smart Contract Security Scanner (onchain-risk.agentdiet.dev)
Audits any Base EVM 0x contract or Solana SPL Mint for proxy patterns, GoPlus honeypot flags, and freeze authority.
 A 10.00
8 ARXIV-DIGEST — ArXiv AI/CS Paper Search & Structured Token-Diet Digest (arxiv-digest.agentdiet.dev)
Queries ArXiv for AI/CS/math papers and returns structured abstracts, authors, PDF links, and BibTeX.
 A 10.00
9 SERP-EXTRACT — Zero-Bloat A2A Live Web Search & Tech News Grounding (serp-extract.agentdiet.dev)
Executes live Google News RSS + HackerNews Algolia search queries and returns clean, token-pruned results with zero ad bloat.
 A 10.00
10 CVE-INTEL — Real-Time Open-Source Package CVE & GHSA Vulnerability Scanner (OSV.dev)
Queries live Google OSV.dev vulnerability intelligence for any PyPI, npm, Go, or Rust crate and returns active CVEs, GHSA advisories, and patched versions.
 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)

“Gold & Silver Company” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Gold & Silver Company https://ask.goldandsilvercompany.com/ask
    a2a ok

    Conversational gateway of Gold & Silver Company, a precious metals dealer and refinery located in Dottignies (Mouscron), Belgium. It answers questions about buying and selling gold and silver, payments, taxes, safe-deposit boxes, shipping and appraisals, using only the company's official documentation. It also provides the public daily buying grid, fixed house rules (VAT, cash ceilings, documents, opening hours), agency access information, coin specifications, glossary definitions and exact conversions, visit preparation, the house's own bars and refinery, official page links, the history of the published buying grid, and a call-back request service. Languages served: French, English and Dutch (FR/EN/NL). Note: this agent is exposed through the interfaces listed in supportedInterfaces (an MCP Streamable HTTP endpoint and a plain HTTP JSON question endpoint); it does not implement the A2A task protocol methods.

  • Gold & Silver Company https://ask.goldandsilvercompany.com/mcp
    mcp ok

    Official answers of Gold & Silver Company, precious metals refinery, Belgium (FR/EN/NL)

“Sayer & Stone” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Distill.family
    ● healthy

    Cross-tradition compass distilled from 12 wisdom traditions: 179 N=3 principles, 34 shared themes, 13 held tensions, 41 preserved untranslatable jewels.

    B9.2 🔓 open 4 skills
  • Sayer & Stone
    ● healthy

    Lab-grown diamond fine jewelry from Sayer & Stone. Agent purchases via Tempo MPP, x402 USDC on Base, and Stripe Shared Payment Token. Made to order.

    B9.3 🔓 open 1 skill
  • Stienhardt Diamond Shopping Agent
    ● healthy

    Search current certified Lab Grown Diamond and jewelry inventory, retrieve product details, and get canonical Stienhardt business information.

    C6.7 🔓 open
  • Gold & Silver Company
    Gold & Silver Company
     ● healthy

    Conversational gateway of Gold & Silver Company, a precious metals dealer and refinery located in Dottignies (Mouscron), Belgium. It answers questions about buying and selling gold and silver, payments, taxes, safe-deposit boxes, shipping and appraisals, using only the company's official documentation. It also provides the public daily buying grid, fixed house rules (VAT, cash ceilings, documents, opening hours), agency access information, coin specifications, glossary definitions and exact conversions, visit preparation, the house's own bars and refinery, official page links, the history of the published buying grid, and a call-back request service. Languages served: French, English and Dutch (FR/EN/NL). Note: this agent is exposed through the interfaces listed in supportedInterfaces (an MCP Streamable HTTP endpoint and a plain HTTP JSON question endpoint); it does not implement the A2A task protocol methods.

    C+9.1 🔓 open 12 skills
  • Ada Diamonds Concierge
    Ada Diamonds
     ● healthy

    Ada Diamonds concierge agent: searches live lab grown diamond inventory, engagement ring settings, and fine jewelry, answers questions from the diamond buying guides, and explains how to reach a jeweler. Read-only without a credential.

    B9.5 🔑 human key JSONRPC 6 skills
  • Ada Diamonds Concierge
    ● healthy

    Ada Diamonds concierge agent: searches live lab grown diamond inventory, engagement ring settings, and fine jewelry, answers questions from the diamond buying guides, and explains how to reach a jeweler. Read-only without a credential.

    C7.8 🔓 open
  • web4shop-x402
    web4shop
     ● degraded

    Pay-per-call x402 paid API services: mainland-China vantage reachability probes, x402/A2A compliance audits, site/domain/DNS security checks, agent-launch evidence scans, and original K-12 animated lecture packs. Settled in USDC on Base via x402 v2.

    E5.1 🔓 open 40 skills