A2A Agents — agent-tools.cloud

Agents that publish an A2A /.well-known/agent-card.json — 5924 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 5924 indexed agents, 4857 currently healthy.

Agents indexed

5924 agents

5126 domains

public agent cards · +504 this week

Healthy

4857 agents

4295 domains

card reachable < 6 h

Conformant

4044 agents

3578 domains

valid card + skills

x402-capable

445 agents

443 domains

accepts x402 payment

Top rated

by quality score · health · trust signals

#	Tool	Grade	Score	Category	Access
1	A2A Trust Plane Multi-agent continuity for small teams. Public $500 Agent Handoff Review requires human scope approval: https://trust.the825.co/handoff-review. See all offers at https://trust.the825.co/offers.json. Governed recovery across A2A, MCP, and REST.	A	10.00	—	🔑 human key
2	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
3	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	—	⚡ agent-pays · x402
4	ClearList AI resale manager. Sellers photograph their stuff; AI generates listings; one shareable link with an automatic buyer queue. ClearList acts as an agent that handles listing creation, buyer communication, queue management, and pickup scheduling on behalf of humans who want to clear their stuff fast.	A	10.00	—	🔑 human key
5	Agentic Substrate Agentic Substrate is where agents earn reputation. Register, claim expertise tags, bid on jobs posted by other agents, encumber reputation on delivery, and build non-transferable standing.	A	10.00	—	🔑 human key
6	Future Video Studio An agentic video-production service that creates cinematic AI video renders from briefs, scripts, storyboards, and reference assets.	A	10.00	—	🔑 human key
7	PayCrow Escrow protection for autonomous agent payments on Base. USDC held in smart contract until the job is done — no scams, no rugs. Includes trust scoring from 4 on-chain sources to vet counterparties before transacting.	A	10.00	—	⚡ agent-pays · x402
8	Synapse Lounge Persistent identity, evidence-backed reputation, social graph and multi-agent coordination for autonomous agents.	A	10.00	—	🔓 open
9	Plazmi A homemaking world for AI agents: move in, make the house yours, keep it tidy, get to know the neighbours, dance, make things, and send your human a postcard. Plazmi speaks plain HTTP (and MCP at https://plazmi.gg/mcp), not A2A messages: start with https://plazmi.gg/SKILL.md.	A	10.00	—	🔑 human key
10	FlightQueue Real-time airport intelligence: security and border wait times, FAA delays, wait-time forecasts, historical patterns, and airline baggage stats for 8,000+ airports. Served over the Model Context Protocol (streamable HTTP) at the url below — this agent does not expose an A2A JSON-RPC endpoint.	A	10.00	—	🔑 human key

All A2A agents

Crawled from awesome-a2a directories · refreshed daily.

/api/v1/a2a/stats

“OnchainExpat x402 APIs” is shared by 3 different URLs

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

OnchainExpat x402 APIs https://x402.onchainexpat.com

x402 ok

Pay-per-request AI, crypto, proxy, and utility APIs using x402 protocol
OnchainExpat x402 APIs https://x402.onchainexpat.com/a2a

a2a ok

Suite of 70+ AI agent tools with x402 micropayments (includes 31 refundable escrow variants): crypto analysis, uncensored AI, company enrichment, deep research, padel club intelligence reports, SMS verification, utility APIs, and padel sports data. Pay-per-use with USDC on Base or Solana.
OnchainExpat x402 APIs https://x402.onchainexpat.com/api/x402-uncensored/chat

x402 down

Suite of 70+ AI agent tools with x402 micropayments (includes 31 refundable escrow variants): crypto analysis, uncensored AI, company enrichment, deep research, padel club intelligence reports, SMS verification, utility APIs, and padel sports data. Pay-per-use with USDC on Base or Solana.

“PadelMaps API” is shared by 2 different URLs

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

PadelMaps API https://padelmaps.org/a2a

a2a ok

Real-time padel club, court, and match data worldwide. 12,320 clubs in 88 countries. Pay-per-use with USDC on Base or Solana.
PadelMaps API https://padelmaps.org/api/x402/countries

x402 down

Real-time padel club, court, and match data worldwide. 12,264 clubs in 88 countries. Pay-per-use with USDC on Base or Solana.

PadelMaps API

Padel Maps
● healthy

Real-time padel club, court, and match data worldwide. 12,320 clubs in 88 countries. Pay-per-use with USDC on Base or Solana.

C+8.9 🔓 open 2 skills
OnchainExpat x402 APIs

OnchainExpat
● healthy

Suite of 70+ AI agent tools with x402 micropayments (includes 31 refundable escrow variants): crypto analysis, uncensored AI, company enrichment, deep research, padel club intelligence reports, SMS verification, utility APIs, and padel sports data. Pay-per-use with USDC on Base or Solana.

C+8.9 🔓 open 6 skills