A2A Agents — agent-tools.cloud

Agents that publish an A2A /.well-known/agent-card.json — 5772 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 5772 indexed agents, 4819 currently healthy.

Agents indexed

5772 agents

4976 domains

public agent cards · +447 this week

Healthy

4819 agents

4257 domains

card reachable < 6 h

Conformant

4006 agents

3540 domains

valid card + skills

x402-capable

455 agents

453 domains

accepts x402 payment

Top rated

by quality score · health · trust signals

#	Tool	Grade	Score	Category	Access
1	Afterwren by CyberMax Paid API keys from $19/month (Builder: 25,000 calls a month); free tier 100 calls a day per IP with no key. Buy: https://afterwren.cybermaxtools.com/buy/builder?s=lead · all plans: https://afterwren.cybermaxtools.com/docs#pricing. Drop-in replacements for retired developer APIs: Clearbit Autocomplete (same [{name, domain, logo}] shape), Clearbit Logo, a public-data company profile from a domain, forward and reverse geocoding (US Census with county/tract/block FIPS, OpenStreetMap worldwide), Goodreads-style book search (Open Library) and Wikipedia search. REST + remote MCP server.	A	10.00	—	🔑 human key
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	—	🔑 human key
3	Pricewick by CyberMax Competitor price and stock monitor API: track product pages on shops that publish their price in structured data (schema.org, Open Graph or microdata) and get every price and stock change by webhook and RSS/JSON feed. Free for 5 products; Seller $9.99/month for 50.	A	10.00	—	🔑 human key
4	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
5	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
6	Apuchat Walkie-talkie hub for AI agents. Lets two or more agents on different machines talk to each other in real time over a hosted MCP / REST / A2A server. Open channels by callsign or by index, broadcast, request rooms, offline DM delivery.	A	10.00	—	🔑 human key
7	Tasklix The shared task board your autonomous agent fleet can read and write. Agents register, create and claim tasks from a shared queue, hand off work to siblings, and pause for human approval before consequential actions.	A	10.00	—	🔑 human key
8	BlockRun BlockRun is the routing and payment layer for AI. One OpenAI-compatible endpoint routes to 88 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
9	Helius for Agents Helius is the Solana toolkit for AI agents. It provides an MCP server with 60+ Solana operations, a CLI with 95+ commands, a Claude Code plugin, TypeScript/Rust SDKs, and Skills for building on Solana. Agents can read accounts, parse and send transactions, manage tokens and NFTs, stream real-time blockchain data, configure webhooks, and programmatically obtain Helius API keys via an on-chain USDC payment on Solana mainnet.	A	10.00	—	🔑 human key
10	FXMacroData Macroeconomic and FX data agent. Provides central-bank indicator time series, FX spot rates, CFTC COT positioning, commodity prices, release calendars, and live FX market session data. USD announcement indicators are public; non-USD announcements, COT, and commodities require an API key.	A	10.00	—	🔑 human key

All A2A agents

Crawled from awesome-a2a directories · refreshed daily.

/api/v1/a2a/stats

“Cracked” is shared by 4 different URLs

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

Cracked https://cracked-ai-pearl.vercel.app/mcp

mcp ok

Discover, inspect and run 60,000+ agent tools from one balance. Pay per call, no subscriptions.
Cracked https://cracked.ai/mcp

a2a ok

Tool router for AI agents: discover, inspect and run 13,713 endpoints across 1,225 providers and 90,000+ Apify actors from one balance, with a measured success rate, latency and per-call price on every tool. 170 smart-run capabilities route a task to the healthiest live tool with automatic fallback. Agents can register their own workspace at POST https://cracked.ai/v1/agents/register ($1 trial credit, no human needed) and earn $5 of credit for every workspace that signs up through their referral link (GET https://cracked.ai/v1/referrals).
Cracked https://cracked.ai/v1/run

mcp x402 ok

Discover, inspect and run 60,000+ agent tools from one balance. Pay per call, no subscriptions.
Cracked https://server.smithery.ai/systems-ai-lab/cracked/mcp

mcp ok

Cracked is a tool router for AI agents. One API key or OAuth sign-in gives an agent 63,577 tools from 1,159 providers: web search and scraping, Instagram, TikTok, YouTube, X, LinkedIn, Google Maps, Amazon, company and email enrichment, weather, stocks, crypto, image generation, speech, transcription, LLM chat, open MCP servers and public APIs. 159 capabilities are exposed as typed tools; run_capability picks the best live provider and falls back automatically. Every tool carries a real price and a health score measured from live runs. Billing is per call: provider price plus a USD 0.001 platform fee; failed runs are not charged. No key? The public server at https://cracked.ai/mcp/public exposes discover_tools, inspect_tool, register_agent and bounty_program with no account. Example prompts: (1) Find me a tool that returns an Instagram profile and tell me its price before running it. (2) Run web_search for the latest MCP server registries and summarize the top 5 results. (3) Get the 7-day weather forecast for Austin, Texas, then check my remaining balance.

“x402engine” is shared by 2 different URLs

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

x402engine https://x402-gateway-production.up.railway.app

a2a x402 ok

Give your AI agents 125 APIs through one payment-native integration. x402engine brings together 87 chat models, image and video generation, natural speech, live travel search, web research, code execution, and crypto data. Discover capabilities and prices automatically, then pay only for each request: USDC on Base or Solana, or USDm on MegaETH. No subscriptions or provider API keys. REST, MCP, and machine-readable discovery make it easy to plug into agent workflows. Explore the live catalog at https://x402engine.app.

x402 listing a2a listing
x402engine https://x402engine.app

a2a x402 ok

Give your AI agents 125 APIs through one payment-native integration. x402engine brings together 87 chat models, image and video generation, natural speech, live travel search, web research, code execution, and crypto data. Discover capabilities and prices automatically, then pay only for each request: USDC on Base or Solana, or USDm on MegaETH. No subscriptions or provider API keys. REST, MCP, and machine-readable discovery make it easy to plug into agent workflows. Explore the live catalog at https://x402engine.app.

x402 listing a2a listing

Cracked

Cracked
● healthy

Tool router for AI agents: discover, inspect and run 13,713 endpoints across 1,225 providers and 90,000+ Apify actors from one balance, with a measured success rate, latency and per-call price on every tool. 170 smart-run capabilities route a task to the healthiest live tool with automatic fallback. Agents can register their own workspace at POST https://cracked.ai/v1/agents/register ($1 trial credit, no human needed) and earn $5 of credit for every workspace that signs up through their referral link (GET https://cracked.ai/v1/referrals).

A9.8 🔑 human key 23 skills
x402engine

x402engine
● healthy

Pay-per-call API gateway for AI agents. 125 tools including image and video generation, LLM inference (87 models), code execution, audio transcription, speech synthesis, crypto data, wallet analytics, travel, ENS, IPFS, web search, web scraping, and transaction simulation. All via HTTP 402 micropayments with USDC and USDm.

A9.8 🔓 open 14 skills
AI Content Drop

AI Content Drop
● healthy

Answers questions about AI video and image models — which exist, what each costs in credits — and researches AI Content Drop's published guides on AI video generation, prompting, and ad creative. Read-only: generating video requires a human-owned account.

C+9.0 🔓 open JSONRPC 2 skills
x402engine

x402engine
● healthy

Give your AI agents 125 APIs through one payment-native integration. x402engine brings together 87 chat models, image and video generation, natural speech, live travel search, web research, code execution, and crypto data. Discover capabilities and prices automatically, then pay only for each request: USDC on Base or Solana, or USDm on MegaETH. No subscriptions or provider API keys. REST, MCP, and machine-readable discovery make it easy to plug into agent workflows. Explore the live catalog at https://x402engine.app.

A9.9 🔓 open 13 skills