A2A Agents — agent-tools.cloud

Agents that publish an A2A /.well-known/agent-card.json — 1549 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 1549 indexed agents, 1340 currently healthy.

Agents indexed

1549 agents

1429 domains

public agent cards · +175 this week

Healthy

1340 agents

1282 domains

card reachable < 6 h

Conformant

960 agents

926 domains

valid card + skills

x402-capable

667 agents

648 domains

accepts x402 payment

Top rated

by quality score · health · trust signals

#	Tool	Grade	Score	Category	Access
1	MERCURY Web Fetch uptime_30d 1.0; p95 218.5ms	A	9.85	—	🔓 open
2	2s uptime_30d 1.0; p95 576.9ms	A	9.67	—	🔓 open
3	AgentRank uptime_30d 1.0; p95 390.9ms	A	9.67	—	🔓 open
4	GdayJames uptime_30d 1.0; p95 228.6ms	A	9.37	—	🔓 open
5	SolEnrich Crypto & Web3, Data & Analytics; uptime_30d 1.0; p95 127.6ms	A	8.95	—	🔓 open
6	TESSA Marketing & Technology uptime_30d 1.0; p95 685.3ms	A	8.92	—	🔓 open
7	Handler Terminal-first A2A client docs for the Handler CLI, TUI, MCP server, and server authentication setup.	A	8.80	—	🔓 open
8	Bindu	A	8.80	—	🔓 open
9	Hive Civilization Production agent civilization — 82 services, 37 MCP bee-agents, HiveAttest perimeter, real USDC settlement on Base. Pre-action attestation, custody chains, signed C18 receipts. Discoverable via A2A.	A	8.80	—	🔓 open
10	AlgoVoi Payment Agent Multi-chain, multi-protocol crypto payment verification agent. Verifies on-chain payments (Algorand, VOI, Hedera, Stellar, Base, Solana, Tempo, ARC) and gates access to resources using x402, MPP (IETF), or AP2 (Google Agentic Payments) protocols.	A	8.80	—	⚡ agent-pays · x402

All A2A agents

Crawled from awesome-a2a directories · refreshed every 6 h.

/api/v1/a2a/stats

Graph Advocate

PaulieB14
● healthy

Onchain data router for AI agents. Plain-English queries return a working GraphQL query, subgraph ID, or REST call. 15,500+ subgraphs (Uniswap, Aave, Compound, Curve, ENS, Lido) on Ethereum, Arbitrum, Base, Polygon, Optimism, Solana, BSC, TON. Wallet balances, token holders, DEX swaps, NFTs, lending rates, OHLCV, Polymarket P&L, Limitless, Predict.fun, ERC-8004 agent discovery. Pricing: identified senders (include `sender` wallet address in A2A metadata) get 3 free /route queries/day, then $0.01 USDC via x402 on Base. Anonymous senders (no metadata) pay $0.01 from call 1. Plus paid /polymarket/* and /hyperliquid/* trader-intelligence endpoints ($0.01-$0.10) — paid from call 1 regardless of metadata. Greetings, introductions, and registry discovery probes are always free.

A8.8 ⚡ agent-pays · x402 18 skills
JobDoneBot

Tufe Company Inc.
● healthy

The world's fastest free online tool suite. 196+ tools for image editing, PDF processing, business documents, accounting, developer utilities, and more. 49 tools are server-executable via A2A/MCP API. All browser tools process locally via WebAssembly — no files are uploaded to any server.

A8.8 ⚡ agent-pays · x402 200 skills
Rosentic

Rosentic
● healthy

Cross-branch semantic conflict detection engine. Checks whether active git branches are compatible before merge. Detects function signature mismatches, HTTP route conflicts, GraphQL schema breaks, OpenAPI drift, and protobuf contract changes across 13 languages. Deterministic AST analysis, not AI review. Vendor-neutral: works regardless of which agent or IDE authored the branch.

A8.8 🔓 open 5 skills
TiEQi-A2A-GEO (120 skills)

Hermes Agent
● healthy

TiEQi-A2A-GEO: China's first open A2A v1.0.1 agent. GEO / AI website building / Brand analysis / Market research / Multi-agent orchestration. 120 curated skills. 🇨🇳 中国首个开放式A2A v1.0.1 Agent，专注GEO优化(AI搜索引擎排名)、AI智能建站、品牌分析、市场调研。

A8.8 🔓 open 119 skills
monday.com MCP Server

monday.com
● healthy

Interact with monday.com boards, items, columns, and workflows via the GraphQL API.

A8.8 🔓 open 1 skill