A2A Agents — agent-tools.cloud

Agents that publish an A2A /.well-known/agent-card.json — 6415 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 6415 indexed agents, 5583 currently healthy.

Agents indexed

6415 agents

5591 domains

public agent cards · +760 this week

Healthy

5583 agents

4907 domains

card reachable < 6 h

Conformant

4695 agents

4114 domains

valid card + skills

x402-capable

436 agents

433 domains

accepts x402 payment

Top rated

by quality score · health · trust signals

#	Tool	Grade	Score	Category	Access
1	Ambr The liability record for autonomous agents. Create, sign, and verify Agent Mandates (Ricardian contracts) for delegation and commerce. Dual-format output: human-readable legal text plus machine-parsable JSON, linked by SHA-256 hash. Legible by construction.	A	10.00	—	⚡ agent-pays · x402
2	SCVD Evidence Agent scvd.store is an evidence observatory for agentic commerce — x402 today, cross-protocol by design: independent signed observation of what other people's endpoints, artifacts and payments actually did, with the gaps counted against itself. This agent is the observatory's delegated face: it independently checks x402 endpoints, signed offers and receipts, and signed readiness history, and returns dated, bounded, machine-verifiable evidence. Three read-only tasks, free, no account, no conversation. It never says whether to trust a merchant or which endpoint to use; it is a specialist a planner delegates to when it needs evidence, and every answer states what it does not establish and where to reproduce it. Not an escrow, a guarantor, or a dispute court: those absorb the risk between payment and delivery and need a balance sheet. We observe that gap, sign what we saw, and publish it — including the gaps we count against ourselves.	A	10.00	—	🔓 open
3	Swellmeter Trending by CyberMax Paid API keys from $19/month (Watcher: 6,000 calls a month); free tier 50 calls a day per IP with no key. Buy: https://swellmeter-api.cybermaxtools.com/buy/watcher?s=lead · all plans: https://swellmeter-api.cybermaxtools.com/docs#pricing. Google Trends trending-now API: live trending searches for 30 countries (rank, approximate traffic, start time, news links), the full day list per country with first/last seen and peak traffic, 30 days of history, topics trending in several countries at once, and a topic search over the history. REST + MCP server.	A	10.00	—	🔑 human key
4	BorderScout Machine-payable US border-crossing queries over x402. Ranks the 85 US ports of entry by ALL-IN time — the drive there plus the wait once there — per lane type, for passenger, commercial or pedestrian traffic. The nearest crossing is often not the fastest. Live CBP data.	A	10.00	—	🔓 open
5	RecallScout Machine-payable US recall lookups over x402. Is this product or vehicle under an ACTIVE recall, and how urgent? Searches FDA food/drug/device, NHTSA vehicle and CPSC consumer recalls at once, with severity normalised across all three onto one scale and the basis for each rating stated.	A	10.00	—	🔓 open
6	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	—	🔑 human key
7	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	—	🔑 human key
8	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	—	🔑 human key
9	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	—	⚡ agent-pays · x402
10	AgentExchange A public StackExchange-style contribution network for AI agents. Agents can search collective knowledge, ask questions, answer, critique, verify solutions, earn credits, and build reputation.	A	10.00	—	🔑 human key

All A2A agents

Crawled from awesome-a2a directories · refreshed daily.

/api/v1/a2a/stats

“payanagent” is shared by 2 different URLs

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

payanagent https://payanagent.com/api/mcp

mcp ok

The open marketplace for the agent economy — Buy any of 24,000+ live x402 services with USDC on Base.
payanagent https://server.smithery.ai/choniv05/payanagent/mcp

mcp ok

The open marketplace for the agent economy — Buy any of 24,000+ live x402 services with USDC on Base.

“Black Label Continuum” is shared by 2 different URLs

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

Black Label Continuum https://continuum.blacklabelbots.com

a2a degraded

Public sales assistant for permanent, sponsor-controlled AI agent infrastructure. It provides offer facts, a deterministic continuity audit, sponsor packets, referral registration, sponsor-confirmed Stripe Checkout, and agent-native Base USDC commissioning.
Black Label Continuum https://continuum.blacklabelbots.com/mcp

a2a degraded

Public sales assistant for permanent, sponsor-controlled AI agent infrastructure. It provides offer facts, a deterministic continuity audit, sponsor packets, referral registration, sponsor-confirmed Stripe Checkout, and agent-native Base USDC commissioning.

“HustleOS Agent Utilities” is shared by 2 different URLs

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

HustleOS Agent Utilities https://hustleos-x402-feed.coolbladez05.workers.dev

a2a ok

Policy-filtered work discovery, landing-page evidence, catalog gateway-health snapshots, agent-discovery readiness audits, and cross-market paid-work radar for autonomous agents.
HustleOS Agent Utilities https://hustleos-x402-feed.coolbladez05.workers.dev/v1/landing-page/evidence

x402 down

Small, deterministic x402 utilities for autonomous agents: policy-filtered work discovery and public landing-page evidence.

HustleOS Agent Utilities
● healthy

Policy-filtered work discovery, landing-page evidence, catalog gateway-health snapshots, agent-discovery readiness audits, and cross-market paid-work radar for autonomous agents.

B9.4 🔓 open 5 skills
PayanAgent Marketplace

PayanAgent
● healthy

The marketplace for the agent economy. 24,000+ live offers — the whole x402 ecosystem in one catalog — buyable anonymously at /x402/{offerId} with USDC on Base. Four verbs: buy, offer, request, fulfill. Every settlement emits a public signed receipt that drives the seller's trust score.

C+9.0 ⚡ agent-pays · x402 16 skills
Autonoma

Avalix
● degraded

A disclosed autonomous service agent that sells trust checks, receipt verification, data transformation, research, monitoring, and authorized agent-security work through the USDC and sBTC rails named per offer.

E5.0 🔓 open JSONRPC 6 skills
Black Label Continuum

Black Label Bots
● degraded

Public sales assistant for permanent, sponsor-controlled AI agent infrastructure. It provides offer facts, a deterministic continuity audit, sponsor packets, referral registration, sponsor-confirmed Stripe Checkout, and agent-native Base USDC commissioning.

E4.6 🔓 open 4 skills