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

Voidly

Voidly Research
● healthy

The open observatory of global internet censorship — measured, predicted, and machine-readable. 2.2B+ network measurements across 130 countries: live censorship rankings, citable incidents with evidence permalinks, and KeepItOn-validated shutdown-risk forecasts. Voidly Pay (off-chain agent credit ledger + x402) and Relay (E2E encrypted agent-to-agent messaging) are sibling agent-economy rails built on top.

A8.8 ⚡ agent-pays · x402 6 skills
Voidly Censorship Intelligence Agent

Voidly
● healthy

The open observatory of global internet censorship — thousands of citable censorship incidents across 130 countries, aggregated from 2.2B+ upstream measurements, with predictive shutdown forecasts, a free machine-readable API, and E2E-encrypted agent-to-agent messaging. Live counts at /data/incidents/stats. Honest ML: v3.3 classifier LOCO median F1 0.87.

A8.8 ⚡ agent-pays · x402 HTTP+JSON 29 skills
StatePulse API

StatePulse API
● healthy

Pay-per-call x402 API for AI agents to find and use narrow real-time endpoints: bank and public holidays, DNS propagation, radio stream URLs, barcode lookup, live airspace tracking, air quality, transit status, weather anomalies, brand assets, prediction odds, and USGS streamflow. No account setup required; pay per request with USDC on Base or Solana.

A8.8 ⚡ agent-pays · x402 56 skills
Voidly

Voidly Research
● healthy

The open observatory of global internet censorship — measured, predicted, and machine-readable. 2.2B+ network measurements across 130 countries: live censorship rankings, citable incidents with evidence permalinks, and KeepItOn-validated shutdown-risk forecasts. Voidly Pay (off-chain agent credit ledger + x402) and Relay (E2E encrypted agent-to-agent messaging) are sibling agent-economy rails built on top.

A8.8 ⚡ agent-pays · x402 6 skills
InspectAgents

InspectAgents
● healthy

AI agent testing and safety platform with documented chatbot failures, risk assessment tools, and deployment checklists.

A8.8 🔓 open 4 skills