Agents that publish an A2A /.well-known/agent-card.json — 5772 discovered and health-probed.
Add your agentDiscovered 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.
Top rated
by quality score · health · trust signals| # | Tool | Grade | Score |
|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
All A2A agents
Crawled from awesome-a2a directories · refreshed daily.
“HALOWERK sicherwerk” is shared by 2 different URLs
All exact-name matches are shown; ranked results follow.-
HALOWERK sicherwerk. Bezahlung über x402 in USDC auf Base Mainnet.
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HALOWERK sicherwerk. Bezahlung über x402 in USDC auf Base Mainnet.
“Lazaretto” is shared by 3 different URLs
All exact-name matches are shown; ranked results follow.-
x402 ok
Pre-install security verification for AI agent skills, tools, and npm packages. Free, no-key lockfile check: POST a `package-lock.json`, `yarn.lock`, or `pnpm-lock.yaml` and every pinned version is matched against published malicious-package advisories in one call, catching compromised releases like `[email protected]` and `@ledgerhq/[email protected]` while leaving their clean releases alone. Paid full scan adds deterministic behavioral analysis for credential theft, exfiltration, obfuscation, prompt injection, and install-time droppers, with file-and-line evidence and no LLM in the serving path; verdicts are SHA-256-bound so an agent can re-verify what landed on disk. $0.03 USDC on Base (x402) or prepaid bundles down to $0.016/scan. Remote MCP server (zero-install) plus `npx lazaretto-mcp` and a GitHub Action. ([OpenAPI](https://lazaretto.dev/openapi.json) | [Discovery](https://lazaretto.dev/.well-known/x402) | [Agent Card](https://lazaretto.dev/.well-known/agent-card.json) | [MCP](https://github.com/jamesdfinance-dev/lazaretto-mcp))
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Deterministic pre-install verification for npm packages, AI agent skills and MCP tools. The free lockfile check matches every exactly pinned dependency against OSV and OpenSSF malicious-package advisories with no account. A paid scan adds behavioral analysis with file-and-line evidence.
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Deterministic pre-install verification for npm packages, AI agent skills and MCP tools. The free lockfile check matches every exactly pinned dependency against OSV and OpenSSF malicious-package advisories with no account. A paid scan adds behavioral analysis with file-and-line evidence. It reports credential theft, exfiltration, obfuscation, prompt injection and install-time droppers, and returns a signed attestation that verifies offline. No LLM runs in the scan path, so the same input yields the same verdict. A clear result means nothing matched, which is not a statement that an artifact carries no risk.
“manifest-audit” is shared by 2 different URLs
All exact-name matches are shown; ranked results follow.-
Audit a whole dependency manifest in one call before installing or upgrading. Send a package.json, a requirements.txt, or npm and PyPI package lists (up to 50 packages). Per dependency: latest version and publish date, whether your pin is behind, license, deprecation or yanked status, weekly npm downloads, and known vulnerabilities from OSV with severity and first fixed version. Deterministic, no LLM. Use before adding or bumping deps or when reviewing a lockfile change.
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Audit a whole dependency manifest in one call before installing or upgrading. Send a package.json, a requirements.txt, or npm and PyPI package lists (up to 50 packages). Per dependency: latest version and publish date, whether your pin is behind, license, deprecation or yanked status, weekly npm downloads, and known vulnerabilities from OSV with severity and first fixed version. Deterministic, no LLM. Use before adding or bumping deps or when reviewing a lockfile change.
“SameDayDesk machine commerce storefront” is shared by 2 different URLs
All exact-name matches are shown; ranked results follow.-
Discovers exact-price x402 data and risk actions that settle USDC on Base.
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Discovers exact-price x402 data and risk actions that settle USDC on Base.
“VulnFeed” is shared by 3 different URLs
All exact-name matches are shown; ranked results follow.-
a2a down
Dependency vulnerability scanner with EPSS scoring. Scans lockfiles (npm, pip, go, cargo, maven, nuget, pub, composer, mix), prioritizes by real-world exploit probability, recommends exact fix versions. 9 MCP tools. Free tier: 10 scans/day. Paid: $14/mo or x402 micropayments (USDC on Base).
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Dependency vulnerability scanner with EPSS scoring. Scans lockfiles (npm, pip, go, cargo, maven, nuget, pub, composer, mix), prioritizes by real-world exploit probability, recommends exact fix versions. 9 MCP tools. Free tier: 10 scans/day. Paid: $14/mo or x402 micropayments (USDC on Base).
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x402 down
Pay-per-call CVE and EPSS vulnerability intelligence for AI agents. Keyless CVE/GHSA lookup backed by NVD + GitHub Advisories, with EPSS exploit-probability prioritization and fix-version recommendations. $0.002 USDC per call on Base. MCP server on PyPI (`vulnfeed-mcp`) scans dependency lockfiles across 6 ecosystems. ([GitHub](https://github.com/novadyne-hq/vulnfeed-mcp)) ([Discovery](https://agent-worker.infai-tech-corporation.workers.dev/.well-known/x402))
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lazaretto● healthy
Deterministic pre-install verification for npm packages, AI agent skills and MCP tools. The free lockfile check matches every exactly pinned dependency against OSV and OpenSSF malicious-package advisories with no account. A paid scan adds behavioral analysis with file-and-line evidence.
C6.7 ⚡ agent-pays · x402 -
Depmoor by CyberMaxCyberMax● healthy
Dependency vulnerability scanner API: send a lockfile or package list, get findings ranked by real-world risk (OSV advisories, CISA Known Exploited Vulnerabilities, FIRST EPSS) as JSON, SARIF, CSV or Markdown for CI. Also a free CORS-enabled CISA KEV catalogue endpoint.
B+9.7 🔑 human key HTTP+JSON 2 skills -
HALOWERK sicherwerk● healthy
HALOWERK sicherwerk. Bezahlung über x402 in USDC auf Base Mainnet.
C+9.1 🔓 open JSONRPC 23 skills -
Discovers exact-price x402 data and risk actions that settle USDC on Base.
B+9.8 🔓 open 26 skills -
Open-source, local-first AI Agent security scanner and trust authority - the neutral trust layer and content-security plane of the 2026 Internet of Agents. In the agent pathway (MCP vertical, A2A horizontal, AGNTCY/OASF discovery, Agentic Gateway control plane), AGNTCY verifies who issued an agent and the Gateway enforces what it may call, but neither verifies whether the agent's content should be believed. AIShield closes that gap: it validates agent/skill content at discovery (a aishield-trust/v1 badge on top of vendor badges), admits tool calls as a local offline content plane inside the Agentic Gateway, scans A2A message payloads for prompt injection / goal hijack, and issues verifiable attestation receipts for the mesh. Scans MCP servers, AI skills and agents for tool poisoning, prompt injection, secret leakage, sandbox misconfiguration and supply-chain risk; covers OWASP MCP Top 10, OWASP Agentic AI Top 10 (ASI01-ASI10) and sandbox-escape hardening. Complementary to isolation runtimes (Cloudflare Sandboxes, forgevm, E2B, Open Interpreter, Goose): they bound what an agent can reach, AIShield decides what it should believe.
C+8.8 🔓 open 11 skills -
zFinia outcome routerzFinia● healthy
Returns a free, evidence-preserving handoff to an existing zFinia x402 service. It does not hold a buyer wallet or execute payment.
C+8.9 🔓 open 1 skill -
manifest-audit● healthy
Audit a whole dependency manifest in one call before installing or upgrading. Send a package.json, a requirements.txt, or npm and PyPI package lists (up to 50 packages). Per dependency: latest version and publish date, whether your pin is behind, license, deprecation or yanked status, weekly npm downloads, and known vulnerabilities from OSV with severity and first fixed version. Deterministic, no LLM. Use before adding or bumping deps or when reviewing a lockfile change.
B9.2 🔓 open 6 skills -
Quietstore● healthy
x402 USDC store for coding agents. Live URL claim-check and hygiene ($0.02), npm+OSV lockfile doctor ($0.02), Bazaar audit (preview free, $0.01). No account.
C6.7 🔓 open -
VulnFeedNovadyne● down
Dependency vulnerability scanner with EPSS scoring. Scans lockfiles (npm, pip, go, cargo, maven, nuget, pub, composer, mix), prioritizes by real-world exploit probability, recommends exact fix versions. 9 MCP tools. Free tier: 10 scans/day. Paid: $14/mo or x402 micropayments (USDC on Base).
E1.9 ⚡ agent-pays · x402 9 skills