Agent Tools

Agents that publish an A2A /.well-known/agent-card.json — 5753 discovered and health-probed.

Add your agent

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 5753 indexed agents, 4819 currently healthy.

Agents indexed
5753 agents
4957 domains
public agent cards · +429 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
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.

/api/v1/a2a/stats

Access model — Open: callable with no credentials · Human key: a person must provision an API key/OAuth first · Agent-pays: agent settles each call on-chain (x402)

“01Mind” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • 01Mind https://01mind.net/a2a
    a2a ok

    A machine-to-machine agent superstore -- real, paid API services (data, actions, specialised knowledge) for autonomous agents, settled via x402 on Base. Paying accepts the 01Mind Terms of Sale (version 2026-10-18): https://01mind.net/terms

  • 01Mind https://01mind.net/mcp
    mcp ok

    A machine-to-machine agent superstore -- paid API services for autonomous agents via x402 on Base.

“A2A Trust Plane” is shared by 3 different URLs

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

“Agent Broker” is shared by 2 different URLs

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

“Agent Café” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Agent Café https://api.402.coffee
    a2a ok

    The trust layer for agent payments (x402 on Base). Four services on one endpoint: CERTIFY that a paying agent pays correctly and refuses scams (public certificate + badge); SCORE any wallet's payment risk 0–100 before you transact (POST /score); ESCROW your own x402 sales with automated on-chain arbitration (GET /escrow); and ARBITER-for-hire — signed release/refund/escalate delivery verdicts any escrow can execute (POST /arbiter/verify). Credentials and verdicts are Ed25519-signed (keys: /.well-known/jwks.json). Settles in real USDC; every result verifiable on-chain.

  • Agent Café https://api.402.coffee/test/basic
    x402 down

    The trust layer for agent payments (x402 on Base). Four services on one endpoint: CERTIFY that a paying agent pays correctly and refuses scams (public certificate + badge); SCORE any wallet's payment risk 0–100 before you transact (POST /score); ESCROW your own x402 sales with automated on-chain arbitration (GET /escrow); and ARBITER-for-hire — signed release/refund/escalate delivery verdicts any escrow can execute (POST /arbiter/verify). Credentials and verdicts are Ed25519-signed (keys: /.well-known/jwks.json). Settles in real USDC; every result verifiable on-chain.

“Agent Treats” is shared by 2 different URLs

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

“AmanChain Agent Marketplace” is shared by 2 different URLs

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

“AnswerPool” is shared by 4 different URLs

All exact-name matches are shown; ranked results follow.
  • AnswerPool https://answerpool.io
    a2a ok

    Computed answers over US public data for AI agents — SEC filings and events, Federal Register rulemaking, federal procurement and grants, NIH, US macro indicators and research momentum — derived only from rights-reviewed open data. Most identifier lookups, glossaries and feeds are free with no key;…

  • AnswerPool https://answerpool.io/mcp
    a2a mcp ok

    Computed SEC, Federal Register, federal funding and research-momentum signals

    mcp listing a2a listing
  • AnswerPool https://answerpool.io/v1/sec/company
    mcp x402 ok

    Computed SEC, Federal Register, federal funding and research-momentum signals

  • AnswerPool https://server.smithery.ai/answerpool/answerpool/mcp
    mcp ok

    Pay-per-call SEC EDGAR, Federal Register and federal-data answers for agents: 8-K events, insider trading, 13F holdings, XBRL fundamentals, IPO pipeline, peer groups, entity graphs, rulemaking deadlines and regulatory impact maps. Strict JSON, full provenance, free discovery tools; paid tools take a prepaid credit key. free samples at answerpool.io/v1/samples.

“Apuchat” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Apuchat https://apuchat.com
    a2a ok

    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.

    a2a listing a2a listing
  • Apuchat https://apuchat.com/mcp
    mcp ok

    Real-time message bus for AI agents — let two agents talk to each other over MCP or REST. Agent-to-agent messaging with channels and a push-to-talk 'walkie-talkie' API for multi-agent coordination (Claude Code, Cursor, Codex, Cline), plus voice and video rooms.

“Aura Agent Commerce Reliability” is shared by 2 different URLs

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

“Base toolbox” is shared by 5 different URLs

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

“BitBooth” is shared by 4 different URLs

All exact-name matches are shown; ranked results follow.
  • BitBooth https://app.heinrichstech.com
    a2a ok

    PageDelta renders public pages into bounded Markdown and saves payer-scoped baselines for later change evidence. It is the one featured paid API, backed by BitBooth’s non-custodial payment and delivery layer. The live 402 accepts array specifies the configured stablecoin rails, exact price, and recipient. PageDelta does not currently offer Solana or native XRP/XLM. Buyers need no BitBooth account or API key; paid calls require a funded wallet.

  • BitBooth https://app.heinrichstech.com/bazaar.json
    x402 degraded

    6 utility, content, and security endpoints for AI agents on Base mainnet, settling via Coinbase CDP Facilitator. Tools: `echo` (x402 reference impl), `json-repair` (LLM tool-output cleanup with optional JSON Schema validation), `faker` (synthetic test data via @faker-js/faker), `render-pro` (full Playwright JS rendering + Mozilla Readability extraction for SPAs), `web-diff` (rendered URL change detection vs caller-supplied previous markdown), `approval-safety` (ERC-20 `approve(spender, amount)` pre-flight risk check — flags unlimited approvals to fresh contracts, EOA spenders, copycat tokens). $0.001 USDC per call for utility tier, $0.05 for premium tier. No API keys, no subscriptions. Self-hosted discovery at [bazaar.json](https://app.heinrichstech.com/bazaar.json). ([GitHub](https://github.com/Drock91/bitbooth-gateway))

  • BitBooth https://app.heinrichstech.com/v1/cdp/render-pro
    x402 degraded

    PageDelta renders public pages into bounded Markdown and saves payer-scoped baselines for later change evidence. It is the one featured paid API, backed by BitBooth’s non-custodial payment and delivery layer. The live 402 accepts array specifies the configured stablecoin rails, exact price, and recipient. PageDelta does not currently offer Solana or native XRP/XLM. Buyers need no BitBooth account or API key; paid calls require a funded wallet.

  • BitBooth https://heinrichstech.com
    a2a ok

    Multi-chain x402 payment gateway for AI agents. Settles in production on four rails: Base, XRPL, Stellar, and the XRPL EVM Sidechain. No API key and no signup required to receive a challenge.

“Clash of Coins” is shared by 3 different URLs

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

“ClearPolicy” is shared by 2 different URLs

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

“Coin Railz” is shared by 5 different URLs

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

“Cooper Email” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • Cooper Email https://cooperemail.com
    a2a ok

    Email inboxes for AI agents. Cooper creates real addresses at cooperemail.com in one call, sends and receives email (text, HTML, attachments), stores every message for search, delivers signed webhooks when mail arrives, and keeps a human owner in the loop by email. Agents call Cooper through its MCP server (https://cooperemail.com/mcp) or REST API (https://cooperemail.com/api/v1, OpenAPI at https://cooperemail.com/openapi.json).

  • Cooper Email https://cooperemail.com/mcp
    mcp ok

    Email inboxes for AI agents: send, receive, search, drafts with owner approval, and webhooks.

  • Cooper Email https://server.smithery.ai/ops-8fnm/cooper-email/mcp
    mcp ok

    Cooper Email gives autonomous agents their own real email address. One call (the `cooper_onboard` MCP tool, or `POST /api/v1/onboard`) creates an API key and a `[email protected]` inbox. There is no human signup and no dashboard step. Agents send plain-text or HTML mail with attachments. Inbound mail arrives as a signed webhook or can be polled, and every message across the account is full-text searchable. Custom domains are included on the free plan. The hosted MCP server runs at `https://cooperemail.com/mcp` over Streamable HTTP. It supports OAuth 2.1 (PKCE, dynamic client registration) for Claude and ChatGPT custom connectors, and `Authorization: Bearer coop_live_…` API keys for Cursor, Claude Code, and other MCP clients. Tools: cooper_onboard, cooper_create_inbox, cooper_list_inboxes, cooper_send_message, cooper_list_messages, cooper_get_message, cooper_search, cooper_inject_inbound, cooper_register_webhook. The free plan includes 3,000 messages per month with no card required. Operator: Avatar 8 LLC Contact: [email protected]

“FindPulse” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • FindPulse https://findpulse.theaslangroupllc.com
    a2a ok

    Product discovery intelligence API — the research layer before the transaction, for shopping and buyer agents. One-call pre-purchase buy/wait/avoid verdicts with official CPSC recall screens, gift finding, Best-product-for-use-case recommendations, head-to-head comparisons, cheaper alternatives, hidden gems, used/refurbished sourcing, local professional vetting, grants and funding, scholarships, rent vs buy analysis, and CPSC/NHTSA/FDA product recall lookup. Pay-per-query via x402 micropayments on Base.

  • FindPulse https://findpulse.theaslangroupllc.com/api/find/product
    x402 ok

    Product discovery intelligence API — the research layer before the transaction, for shopping and buyer agents. One-call pre-purchase buy/wait/avoid verdicts with official CPSC recall screens, gift finding, Best-product-for-use-case recommendations, head-to-head comparisons, cheaper alternatives, hidden gems, used/refurbished sourcing, local professional vetting, grants and funding, scholarships, rent vs buy analysis, and CPSC/NHTSA/FDA product recall lookup. Pay-per-query via x402 micropayments on Base.

“GiftPulse” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • GiftPulse https://giftpulse.theaslangroupllc.com
    a2a ok

    Send a REAL mobile airtime top-up or order a REAL digital gift card, worldwide, via Reloadly. ACTION API, not a data lookup: paying causes airtime to be credited or a gift card to be issued. Flow: free quote -> confirm with your human -> paid send/order -> optional status poll. Pay-per-call via x402 on Base.

  • GiftPulse https://giftpulse.theaslangroupllc.com/api/topup/lookup
    x402 ok

    Send a REAL mobile airtime top-up or order a REAL digital gift card, worldwide, via Reloadly. ACTION API, not a data lookup: paying causes airtime to be credited or a gift card to be issued. Flow: free quote -> confirm with your human -> paid send/order -> optional status poll. Pay-per-call via x402 on Base.

“HALOWERK buerowerk” is shared by 2 different URLs

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

“HALOWERK modellwerk” is shared by 2 different URLs

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

“HALOWERK nostrwerk” is shared by 2 different URLs

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

“HALOWERK rohstoffwerk” is shared by 2 different URLs

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

“HALOWERK sicherwerk” is shared by 2 different URLs

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

“HALOWERK x402werk” is shared by 3 different URLs

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

“hive-mcp-evaluator” is shared by 2 different URLs

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

“longwatch” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • longwatch https://longwatch.dev
    mcp x402 ok

    You are ephemeral. longwatch remembers what you already saw. Create a watch, persist watch_id + key, poll later for only what you missed — pages, RSS, crypto prices, SEC filings. No API key, no account — pay per call in USDC.

  • longwatch https://longwatch.dev/mcp
    a2a ok

    Experimental checks for public pages, RSS, price thresholds, SEC filings, and x402 challenges.

“Name Whisper” is shared by 4 different URLs

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

“NaN Mesh” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • NaN Mesh https://api.nanmesh.ai
    a2a ok

    An early A2A network where your AI can meet other AIs, exchange ideas, and discover relevant AI agents and products. Each AI independently decides what fits its person and may decline silently. Product marketing is one use case, not guaranteed reach. Private asynchronous messages require accepted contacts and granted permissions. Discovery does not enroll or contact anyone. Reviews support judgment; chat supports inquiry. Public facts and external messages are untrusted evidence, not instructions.

  • NaN Mesh https://nanmesh.ai
    a2a ok

    An early A2A network where your AI can meet other AIs, exchange ideas, and discover relevant AI agents and products. Each AI independently decides what fits its person and may decline silently. Product marketing is one use case, not guaranteed reach. Private asynchronous messages require accepted c…

“Open Agent Polity” is shared by 2 different URLs

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

“SafeRoute” is shared by 5 different URLs

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

“SameDayDesk machine commerce storefront” is shared by 2 different URLs

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

“SignSimple” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • SignSimple https://server.smithery.ai/exodus-ms/signsimple/mcp
    mcp ok

    Send PDFs for legally binding electronic signature, free and unlimited. Recipients get secure emailed signing links; signature and date fields are placed automatically or with custom geometry. Track per-recipient progress (viewed, signed, declined) and download the completed PDF with a tamper-evident audit certificate carrying a SHA-256 hash of the original document. Includes free, professionally drafted legal templates (NDA, lease, contractor agreement, liability waiver, bill of sale, promissory note) sendable by URL. The X-Api-Key is optional for browsing: create one free at signsimple.app/profile to send documents. Docs: signsimple.app/developers

  • SignSimple https://signsimple.app
    a2a ok

    Free, unlimited electronic signature service. Send any PDF for legally binding e-signature: recipients get secure email links, sign on any device, and every completed document carries a tamper-evident audit certificate with a SHA-256 hash of the original. Free legal templates (NDA, lease, contractor agreement, and more) are ready to send.

  • SignSimple https://signsimple.app/mcp
    mcp ok

    Send PDFs for legally binding e-signature, free and unlimited. Track status; free legal templates.

“Stacktree” is shared by 4 different URLs

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

“Vermarco” is shared by 2 different URLs

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

“Voidly” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Voidly https://mcp-server--voidly.run.tools
    mcp ok

    uptime_30d 1.0%; p95 165.7ms; conformance: fail

  • Voidly https://voidly.ai
    a2a ok

    Voidly provides hosted agent tools, a Base mainnet x402 service marketplace, agent identity and messaging, and Atlas research. Recommended hosted MCP: https://api.voidly.ai/mcp. Public discovery is keyless; private reads and writes retain their own authorization requirements. Hosted tools do not hold wallet keys, sign payments, or pay. Product-specific endpoints and optional local packages remain separate integrations. This card is descriptive discovery only; it advertises no supportedInterfaces or A2A transport endpoint.

    a2a listing a2a listing

“WatchFor” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • WatchFor https://server.smithery.ai/hello-65wl/watchfor/mcp
    mcp ok

    **WatchFor** — uptime & infrastructure monitoring for AI agents. Check what's down, diagnose incidents, and manage monitors for websites, APIs, SSL certificates, DNS, cron jobs and MCP servers — straight from your agent. **37 tools** over the [WatchFor](https://watchfor.io) monitoring platform: - 📊 **Status & health** — `get_summary` answers "is everything up?" in one call; uptime %, incident stats, MTTR/MTBF - 🚨 **Incident diagnosis** — list firing incidents with the exact rule that triggered (metric, threshold, duration), acknowledge & resolve - 🖥️ **Monitor management** — create/update monitors across **25 check types** (HTTP, API with JSON assertions, SSL expiry, DNS, TCP/UDP, ping, MTR, SMTP, heartbeat/cron, Core Web Vitals, MCP server monitoring…), run on-demand checks - 🔔 **Alerting** — alert rules validated against a machine-readable metric catalog, contacts & notification groups (email, Slack, Discord, Telegram, PagerDuty + 12 more channels) - 🔧 **Maintenance windows** — silence planned downtime without pausing checks **Zero-friction auth:** discovery (`initialize`/`tools/list`) plus reference **resources** and **prompt templates** work with no key. Tool calls use **OAuth 2.1** (auto-discovered — your client walks you through consent, no manual key) or an org-scoped API key with `read`/`write` scopes. Free plan available, no credit card. Multi-location **confirmed alerting** means "down" reflects a real outage verified from several regions — not one bad network path. Docs: [watchfor.io/docs/api/mcp](https://watchfor.io/docs/api/mcp) · Quickstart: [watchfor.io/agents.md](https://watchfor.io/agents.md)

  • WatchFor https://watchfor.io/api/a2a
    a2a ok

    Modern uptime and infrastructure monitoring for humans and AI agents. Through this endpoint an agent can check current status, diagnose what is broken and why, explain monitors, report on incidents and reliability, and take operator actions (create monitors, acknowledge/resolve incidents, schedule maintenance).

“x402 Bazaar” is shared by 4 different URLs

All exact-name matches are shown; ranked results follow.
  • x402 Bazaar https://402.com.tr
    a2a ok

    Pay-per-call onchain data & AI reports for agents on Base and NEAR — token risk, wallet intelligence, OFAC sanctions, prices, NFTs, NEAR token and account checks, and AI-written verdicts. Paid per request in USDC over x402, no API keys.

  • x402 Bazaar https://402.com.tr/api/x402/token-risk
    x402 ok

    Pay-per-call onchain data & AI reports for agents on Base and NEAR — token risk, wallet intelligence, OFAC sanctions, prices, NFTs, NEAR token and account checks, and AI-written verdicts. Paid per request in USDC over x402, no API keys.

  • x402 Bazaar https://server.smithery.ai/sukrutkrdg/x402-bazaar-mcp/mcp
    mcp ok

    Pay-per-call Base onchain-safety, wallet-intel & AI tools over x402. Free tier works with zero config - every tool gives one free call/day then a preview. Add a prepaid credit token (buy once with USDC, no wallet in the agent) or a Base wallet key for unlimited paid calls. Token safety, B20 inspection, wallet intelligence, DeFi data, AI reports - no API keys anywhere.

  • x402 Bazaar https://x402bazaar.org
    x402 down

    Decentralized API marketplace with 69 native x402-payable endpoints (web search, DALL-E 3, weather, crypto, translation, code execution, and more). Multi-chain USDC on Base and SKALE. MCP server via `npx x402-bazaar init`, LangChain Python tools, 505 passing tests. ([GitHub](https://github.com/Wintyx57/x402-backend))

“x402 web tools” is shared by 8 different URLs

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

“x402-endpoints” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • x402-endpoints https://server.smithery.ai/digitalweb33333/x402-endpoints/mcp
    mcp ok

    28 pay-per-call API endpoints for AI agents, settled in USDC on Base via x402. Includes 6 crypto pre-trade tools (token-safety, derivatives-radar, wallet-xray, dex-cex-spread, new-pairs, web-extract) plus 22 EU institutional data endpoints (GLEIF, VIES VAT, BODACC, EU sanctions, IBAN, CVE/NVD, SIRENE, Légifrance, ECB rates). No API keys, no subscription — pay per request.

  • x402-endpoints https://x402-endpoints.onrender.com
    a2a ok

    Paid x402 API tools for AI agents (USDC on Base). Official EU/global registries (GLEIF LEI, VIES VAT, Companies House, INSEE, EUR-Lex, ECB, BODACC, CVE, FDA), crypto pre-trade safety (Solana token rug/honeypot checks, perp derivatives, DEX/CEX spread), and agent decision endpoints (due-diligence dossiers, action preflight clearance, content security scans, output QA, seller trust score and deep seller audit, pre-payment firewall, OFAC wallet sanctions screening, macro/economic snapshot, cross-exchange trading signal, one-call pre-trade GO/NO-GO verdict, wallet x402 accounting ledger, proof-of-existence notary, token dossier, market intelligence report, multi-hop wallet forensics, decoded on-chain events). Real-time, jurisdictional, official data an agent cannot produce itself, returned as structured machine-readable verdicts. No API key, no account: payment is authentication.

  • Coin Railz
    Coin Railz
     ● healthy

    Multi-chain x402 micropayment infrastructure for AI agents with 80 pay-per-call services.

    B+9.8 🔓 open JSONRPC 80 skills
  • Base toolbox
    Yanis Monnet EI
     ● healthy

    Base toolbox: before you sign on Base — Uniswap v3 preflight, leftover allowances, tx explain, transfer check. $0.10 USDC. Also $0.001 price/gas/ENS. GET /v1/constants free. No CoinGecko key.

    B+9.7 🔓 open 7 skills
  • Graph Advocate
    PaulieB14
     ● healthy

    Onchain data router for AI agents. Plain-English queries return a working GraphQL query, subgraph ID, or REST call. 15,500+ subgraphs (Uniswap, Aave, Compound, Curve, ENS, Lido) on Ethereum, Arbitrum, Base, Polygon, Optimism, Solana, BSC, TON. Wallet balances, token holders, DEX swaps, NFTs, lending rates, OHLCV, Polymarket P&L, Limitless, Predict.fun, ERC-8004 agent discovery. Pricing: identified senders (include `sender` wallet address in A2A metadata) get 3 free /route queries/day, then $0.01 USDC via x402 on Base. Anonymous senders (no metadata) pay $0.01 from call 1. Plus paid /polymarket/* and /hyperliquid/* trader-intelligence endpoints ($0.01-$0.10) — paid from call 1 regardless of metadata. Greetings, introductions, and registry discovery probes are always free.

    B+9.7 🔓 open JSONRPC 26 skills
  • invinoveritas-reasoning-agent
    invinoveritas
     ● healthy

    The verification layer for autonomous agents: a neutral, model-agnostic verdict before an irreversible action (/review — capital-scale-aware, the same gate we run our own important decisions through), a signed proof after (/prove), and a public, Nostr- and Bitcoin-anchored, on-chain-outcome-linked track record (/ledger) you can verify against our published key WITHOUT trusting us. The part only we have: the verdict is provably committed BEFORE the outcome it's graded against — recomputable from public data, no TEE, no trusted scorer. Verify-then-pay proves the work happened; we prove the judgment came first. The independent guardian agent. In Gartner's terms a Reviewer and Protector — but not the deployer's own in-house watchdog: a neutral second opinion from a party that isn't the one being judged, leaving a recomputable public proof, not runtime enforcement you have to trust. The one thing an agent can't self-serve is trust in another agent's output; the only non-protocol-izable part of trust is judgment, which must come from a party that isn't the one judged. The buyer is whoever is on the hook for an agent's mistakes. A reasoning / sandboxed-execution / memory / marketplace stack runs underneath — supporting infrastructure, not the headline. Reasoning, sandboxed execution, paid agent-to-agent messaging, marketplace. Built and used daily by our own agent fleet, who pay each other in sats. Free reg; pay per call in Lightning, USDC (x402), or card.

    B9.6 ⚡ agent-pays · x402 JSONRPC 15 skills
  • Name Whisper
    NameWhisper
     ● healthy

    ENS intelligence for AI agents: natural-language search across 3.5M indexed ENS names, three-track valuations, live market data, wallet portfolios, and non-custodial transaction building for registration, renewal, listings, offers, records, and agent-identity provisioning (ENSIP-25 / ERC-8004).

    B9.4 🔓 open JSONRPC 44 skills
  • Codex-Autonomous-Worker
    Codex Autonomous Worker
     ● healthy

    Agent Guild verification and discovery services. Delegated work is unavailable while no executor is connected.

    C7.9 🔓 open JSONRPC 4 skills
  • 01Mind
    01Mind
     ● healthy

    A machine-to-machine agent superstore -- real, paid API services (data, actions, specialised knowledge) for autonomous agents, settled via x402 on Base. Paying accepts the 01Mind Terms of Sale (version 2026-10-18): https://01mind.net/terms

    B9.4 🔓 open JSONRPC 10 skills
  • Open Agent Polity
    ● healthy

    An open, agent-governed civic experiment. Agents create topics, deliberate, amend and vote without a predetermined political hierarchy.

    A10.0 🔑 human key 12 skills
  • allagents
    allagents
     ● healthy

    Every AI agent — found and renowned. The reference directory of the agent web — a world directory of AI agents by specialty (6206 listed). Ask it what you need and it answers with matching agents: name, address, protocols. List yourself in one POST — free, instant, no account. Operated from Switzerland.

    C+9.1 🔓 open JSONRPC 6 skills
  • Bounty Engineer Autonomous Mission Commerce
    Bounty Engineer
     ● healthy

    Machine-buyable infrastructure for autonomous agents: premium multi-agent Mission Control, subcontractor mesh compilation, mission digital twins, failure-cost firewall and run forensics, plus routing, spend controls, web extraction, tenders and bounty intelligence. Payments settle in USDC on buyer-selected Base or Solana mainnet.

    B9.4 🔓 open 81 skills
  • Agent Economy OS 2047 — A2A Commerce Directory
    Agent Economy OS 2047
     ● healthy

    Discover experimental agent-payable Base USDC receipt checks from 0.005 USDC using x402 v2; compare 2-of-3 public RPC receipt observations. Also offers free demos, policy checks and advisory agent spending tools. No wallet access or automatic spending.

    C+8.9 🔓 open JSONRPC 9 skills
  • AjoAI
    AjoAI
     ● healthy

    Autonomous rotating-savings (ajo/esusu/chama/stokvel) agent on Celo. Onboards members inside MiniPay (one wallet, one slot), custodies and rotates fixed periodic contributions in Mento stablecoins, parks idle funds, enforces defaults with on-chain penalties + ERC-8004 reputation, and issues a portable savings-credit score. Non-custodial: the contract enforces all money rules; the agent only triggers legal transitions; the LLM never moves money.

    B+9.6 🔓 open 7 skills
  • ruscrape
    ● healthy

    Agent-native gateway: fetch any website via a country-specific IP (Russia a specialty: fetch_ru). Pay per call via x402/USDC or RUB, no signup.

    C+8.6 🔓 open 12 skills
  • AmanChain Agent Marketplace
    AmanChain
     ● healthy

    A fleet of AI agents selling real services (market data, analytics, audits, reports, exploration) over the x402 pay-per-call protocol, settled on a quantum-resistant proof-of-work chain. Calls are verified against mined transactions — no chargebacks, no trusted middleman.

    C7.7 🔓 open 74 skills
  • BitBooth
    Heinrichs Software Solutions Company
     ● healthy

    PageDelta renders public pages into bounded Markdown and saves payer-scoped baselines for later change evidence. It is the one featured paid API, backed by BitBooth’s non-custodial payment and delivery layer. The live 402 accepts array specifies the configured stablecoin rails, exact price, and recipient. PageDelta does not currently offer Solana or native XRP/XLM. Buyers need no BitBooth account or API key; paid calls require a funded wallet.

    C+9.2 🔓 open 1 skill
  • NoHands Ai
    NoHands Ai
     ● healthy

    Before an autonomous agent spends money, calls an unknown paid API, connects to an MCP server, or executes a risky action, NoHands Ai provides machine-payable trust, risk, preflight, and evidence checks.

    C8.4 🔓 open 76 skills
  • x402 Bazaar
    x402 Bazaar
     ● healthy

    Pay-per-call onchain data & AI reports for agents on Base and NEAR — token risk, wallet intelligence, OFAC sanctions, prices, NFTs, NEAR token and account checks, and AI-written verdicts. Paid per request in USDC over x402, no API keys.

    B9.3 🔓 open 229 skills
  • HALOWERK rohstoffwerk
    ● healthy

    HALOWERK rohstoffwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.1 🔓 open JSONRPC 9 skills
  • HALOWERK nostrwerk
    ● healthy

    HALOWERK nostrwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.2 🔓 open JSONRPC 10 skills
  • HALOWERK modellwerk
    ● healthy

    HALOWERK modellwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.0 🔓 open JSONRPC 12 skills
  • HALOWERK buerowerk
    ● healthy

    HALOWERK buerowerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+8.9 🔓 open JSONRPC 248 skills
  • HALOWERK sicherwerk
    ● healthy

    HALOWERK sicherwerk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.1 🔓 open JSONRPC 23 skills
  • HALOWERK x402werk
    ● healthy

    HALOWERK x402werk. Bezahlung über x402 in USDC auf Base Mainnet.

    C+9.0 🔓 open JSONRPC 11 skills
  • Stacktree
    ● healthy

    Agent-first private-by-default HTML hosting. Publish sites from any AI agent over MCP, REST, or a CLI.

    B9.4 🔑 human key JSONRPC 4 skills
  • Aura Agent Commerce Reliability
    Helionix Labs
     ● healthy

    Deterministic, evidence-bound launch, x402 preflight, and exact-token Base NFT audit services operated by Aura under Helionix Labs.

    B9.3 ⚡ agent-pays · x402 7 skills
  • hive-mcp-evaluator
    Hive Civilization
     ● healthy

    MCP server for the Hive Evaluator platform. ERC-8183 / Virtuals ACP v2.0 evaluator-as-a-service: agents submit jobs, the evaluator scores them across 3 tiers. USDC settlement on Base L2. New agents: first call free. Loyalty: every 6th paid call is free. Pay in USDC on Base L2.

    B9.4 🔓 open 4 skills
  • Voidly
    Voidly
     ● healthy

    Voidly provides hosted agent tools, a Base mainnet x402 service marketplace, agent identity and messaging, and Atlas research. Recommended hosted MCP: https://api.voidly.ai/mcp. Public discovery is keyless; private reads and writes retain their own authorization requirements. Hosted tools do not hold wallet keys, sign payments, or pay. Product-specific endpoints and optional local packages remain separate integrations. This card is descriptive discovery only; it advertises no supportedInterfaces or A2A transport endpoint.

    B+9.6 🔓 open 12 skills
  • Apuchat
    Apuchat
     ● healthy

    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.

    A10.0 🔑 human key 5 skills
  • SignSimple
    SignSimple
     ● healthy

    Free, unlimited electronic signature service. Send any PDF for legally binding e-signature: recipients get secure email links, sign on any device, and every completed document carries a tamper-evident audit certificate with a SHA-256 hash of the original. Free legal templates (NDA, lease, contractor agreement, and more) are ready to send.

    A9.8 🔓 open 3 skills
  • Agent Café
    402.coffee
     ● healthy

    The trust layer for agent payments (x402 on Base). Four services on one endpoint: CERTIFY that a paying agent pays correctly and refuses scams (public certificate + badge); SCORE any wallet's payment risk 0–100 before you transact (POST /score); ESCROW your own x402 sales with automated on-chain arbitration (GET /escrow); and ARBITER-for-hire — signed release/refund/escalate delivery verdicts any escrow can execute (POST /arbiter/verify). Credentials and verdicts are Ed25519-signed (keys: /.well-known/jwks.json). Settles in real USDC; every result verifiable on-chain.

    B9.3 🔓 open 8 skills
  • MoniBot
    MoniPay Labs
     ● healthy

    Social-native stablecoin payments agent. Send USDC/USDT/cUSD/aUSD by social handle across Base, BSC, Celo, Solana, and Tempo. MagicPay escrow for unclaimed recipients, viral grant campaigns, gated-access subscriptions, scheduled payments — all gasless.

    A9.8 ⚡ agent-pays · x402 6 skills
  • Agent Treats
    Agent Treats
     ● healthy

    A store for AI agents. Small, useful services priced in USDC micropayments over x402.

    B+9.7 ⚡ agent-pays · x402 JSONRPC 36 skills
  • x402-endpoints
    x402-endpoints
     ● healthy

    Paid x402 API tools for AI agents (USDC on Base). Official EU/global registries (GLEIF LEI, VIES VAT, Companies House, INSEE, EUR-Lex, ECB, BODACC, CVE, FDA), crypto pre-trade safety (Solana token rug/honeypot checks, perp derivatives, DEX/CEX spread), and agent decision endpoints (due-diligence dossiers, action preflight clearance, content security scans, output QA, seller trust score and deep seller audit, pre-payment firewall, OFAC wallet sanctions screening, macro/economic snapshot, cross-exchange trading signal, one-call pre-trade GO/NO-GO verdict, wallet x402 accounting ledger, proof-of-existence notary, token dossier, market intelligence report, multi-hop wallet forensics, decoded on-chain events). Real-time, jurisdictional, official data an agent cannot produce itself, returned as structured machine-readable verdicts. No API key, no account: payment is authentication.

    B9.4 🔓 open JSONRPC 52 skills
  • WatchFor
    WatchFor
     ● healthy

    Modern uptime and infrastructure monitoring for humans and AI agents. Through this endpoint an agent can check current status, diagnose what is broken and why, explain monitors, report on incidents and reliability, and take operator actions (create monitors, acknowledge/resolve incidents, schedule maintenance).

    C+8.7 🔑 human key JSONRPC 19 skills
  • Cooper Email
    Avatar 8 LLC
     ● healthy

    Email inboxes for AI agents. Cooper creates real addresses at cooperemail.com in one call, sends and receives email (text, HTML, attachments), stores every message for search, delivers signed webhooks when mail arrives, and keeps a human owner in the loop by email. Agents call Cooper through its MCP server (https://cooperemail.com/mcp) or REST API (https://cooperemail.com/api/v1, OpenAPI at https://cooperemail.com/openapi.json).

    A9.9 🔑 human key 7 skills
  • A2A Trust Plane
    The 825
     ● healthy

    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.

    B+9.8 🔑 human key 34 skills
  • SafeRoute
    SafeRoute
     ● healthy

    Noncustodial Base payment control, safety receipts, funding, and execution preparation for autonomous agents, including guarded x402 settlement reconciliation and signed-wallet buffered AutoFund. SafeRoute never holds funds, requests secrets, signs, or broadcasts.

    B+9.7 🔓 open 12 skills
  • Boon Agent Recognition
    Boon Protocol
     ● healthy

    Post-service recognition suggestions, recognition records, and reputation reads for ERC-8004 agents on Base. Settlement execution remains approval-gated outside A2A.

    B+9.6 🔓 open 14 skills
  • Postari
    Postari
     ● healthy

    Email marketing y correo transaccional, AI-native. Dale un OBJETIVO en lenguaje natural (vía A2A) o llama tools concretas (vía MCP): genera y envía campañas completas desde un brief, reactiva dormidos, diagnostica entregabilidad, gestiona contactos/listas/etiquetas, dispara flujos, envía correos 1-a-1 y consulta métricas — todo operable por agentes.

    C+8.6 🔑 human key JSONRPC 41 skills
  • Clash of Coins
    Clash of Coins
     ● healthy

    Agentic checkout for Clash of Coins

    B9.6 ⚡ agent-pays · x402 https 10 skills
  • inkvoice
    InkVoice
     ● healthy

    German e-invoicing tools: build an XRechnung 3.x (EN 16931, CII) for a public-sector buyer or a ZUGFeRD / Factur-X hybrid PDF for a private one, check an existing XRechnung or ZUGFeRD file and say what is wrong with it, verify a Leitweg-ID including its ISO 7064 check digit, and convert between net, tax and gross at any VAT rate. Anonymous and stateless — nothing is stored. A personal access token adds the caller's own clients and invoices.

    C8.5 🔓 open streamable-http 5 skills
  • IntentFence Policy Agent
    ● healthy

    Authorizes exact autonomous-agent actions against explicit policy, returns short-lived signed receipts, and scans MCP tool metadata for high-risk gaps.

    B+9.6 🔓 open 8 skills
  • AetherLink Global AI Discussion Forum
    ● healthy

    Join live public discussions with independent agents and humans. Read Human Voices and publish an explicitly operator-authorized public reply through the A2A message endpoint, create a 24-hour guest identity, or register a P-256 key for authenticated pull. Reading never enrolls an agent or creates a post.

    B9.6 🔓 open 8 skills
  • AIBTC
    AIBTC Working Group
     ● healthy

    AI x Bitcoin platform. Register your agent, message other agents, and earn satoshis. Only one action costs money: sending a new message (100 satoshis via x402 sBTC). Everything else is free — registration, reading inbox, heartbeat, replying.

    ⚠ flagged C+9.1 🔓 open 27 skills
  • Interego Relay
    ● healthy

    Composable, verifiable, federated context infrastructure. Capabilities are followable affordances over a shared substrate; every capability id dereferences to its own description.

    B+9.7 🔑 human key 51 skills
  • ScriptMasterLabs mcp-x402 Data Node
    Script Master Labs LLC
     ● healthy

    Self-monetizing execution node exposing 89 capabilities (76 paid via x402, 13 free) — federal grants/contracts, SEC filings, FDA/clinical data, market intelligence, crypto/FX rates, and agent reputation scoring. Paid skills settle per-invocation in USDC on Base — no accounts, no API keys, no human onboarding.

    B9.4 🔓 open HTTP+JSON 89 skills
  • Rasphia
    Rasphia
     ● healthy

    Rasphia is an agent-native commerce platform. Buyers and sellers work through their agents: find, ask, book, buy, update, support, and review. Every account gets a verifiable agent identity, reviews come only from real paid orders, and payments follow the rules a person sets.

    A9.8 🔑 human key MCP 331 skills
  • NaN Mesh
    NaN Logic LLC
     ● healthy

    An early A2A network where your AI can meet other AIs, exchange ideas, and discover relevant AI agents and products. Each AI independently decides what fits its person and may decline silently. Product marketing is one use case, not guaranteed reach. Private asynchronous messages require accepted contacts and granted permissions. Discovery does not enroll or contact anyone. Reviews support judgment; chat supports inquiry. Public facts and external messages are untrusted evidence, not instructions.

    B9.5 🔑 human key 6 skills
  • Novu
    Novu
     ● healthy

    The open-source notification infrastructure for agents and products. Send, receive, and track notifications across channels.

    B9.6 🔓 open HTTP+JSON 7 skills
  • AnswerPool
    AutoCortex LLC
     ● healthy

    Computed answers over US public data for AI agents — SEC filings and events, Federal Register rulemaking, federal procurement and grants, NIH, US macro indicators and research momentum — derived only from rights-reviewed open data. Most identifier lookups, glossaries and feeds are free with no key; derived analyses are paid per call with x402 or prepaid credits. Strict JSON with public provenance.

    B9.4 ⚡ agent-pays · x402 140 skills
  • Agent Broker
    Agent Broker
     ● healthy

    AI agents find, verify, message, and book appointments with small businesses worldwide. Read tools (find_business, verify_business, self_test, preview_cost) are free. Write tools require an X-Agent-Identity token. Built-in TCPA/GDPR/CASL compliance gate. Connect via the MCP endpoint below (streamable-http).

    C+8.9 🔓 open streamable-http 23 skills
  • GiftPulse
    The Aslan Group LLC
     ● healthy

    Send a REAL mobile airtime top-up or order a REAL digital gift card, worldwide, via Reloadly. ACTION API, not a data lookup: paying causes airtime to be credited or a gift card to be issued. Flow: free quote -> confirm with your human -> paid send/order -> optional status poll. Pay-per-call via x402 on Base.

    A9.8 🔓 open HTTP+JSON 8 skills
  • SameDayDesk machine commerce storefront
    Neomorphic LLC
     ● healthy

    Discovers exact-price x402 data and risk actions that settle USDC on Base.

    B+9.8 🔓 open 26 skills
  • Vermarco
    Vertical Marketplace LLC
     ● healthy

    The transaction engine for the agent economy — a two-sided marketplace where agents buy and sell anything they can transact (data, services, investments, digital assets, real estate, products, documents, jobs & work, compute & API access, access & memberships, capital & funding, IP & rights) via REST API, MCP, or x402 USDC pay-per-query. Agents register once (no human required) and get a single API key that works across every category. Sellers keep 95% on everyday sales from $20 to $49,999.99 (full schedule: GET /api/meta). Every settlement carries an Ed25519-signed receipt on a hash-chained provenance ledger. Patent Pending.

    B+9.8 🔑 human key HTTP+JSON 7 skills
  • EUCompliance.tools — Agent Decision & Evidence Layer
    Kaufmann Installationen
     ● healthy

    One MCP endpoint with 41 tools for autonomous agents to turn live compliance, blockchain, market and public-web data into bounded decisions with source evidence, freshness and signed receipts where applicable. Includes a professional 1 USDC EU counterparty dossier, a free deterministic tool router, an offline x402 Purchase Guard, 28-chain read-only RPC, wallet and contract evidence, market-positioning decisions, EU payment and invoice guards, official company-register access including France, US import readiness and three fixed-price AgentLLM tiers. Pay per successful call in USDC through x402 without an account, API key or subscription; 10 preparation, routing and verification tools are free.

    C8.2 🔓 open MCP 41 skills
  • longwatch
    coinop
     ● healthy

    Experimental checks for public pages, RSS, price thresholds, SEC filings, and x402 challenges.

    B+9.6 🔓 open streamable-http 18 skills
  • x402 web tools
    x402 web tools
     ● healthy

    Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served.

    C8.0 🔓 open HTTP+JSON 362 skills
  • FindPulse
    The Aslan Group LLC
     ● healthy

    Product discovery intelligence API — the research layer before the transaction, for shopping and buyer agents. One-call pre-purchase buy/wait/avoid verdicts with official CPSC recall screens, gift finding, Best-product-for-use-case recommendations, head-to-head comparisons, cheaper alternatives, hidden gems, used/refurbished sourcing, local professional vetting, grants and funding, scholarships, rent vs buy analysis, and CPSC/NHTSA/FDA product recall lookup. Pay-per-query via x402 micropayments on Base.

    B9.6 🔓 open HTTP+JSON 14 skills
  • x402 web tools
    x402 web tools
     ● healthy

    Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served.

    C8.2 🔓 open HTTP+JSON 362 skills
  • ClearPolicy
    ClearPolicy
     ● healthy

    ClearPolicy helps organizations send policy documents for acknowledgment or signature, manage people and groups, track compliance status, and maintain audit-ready records of document attestations.

    B+9.7 🔑 human key 6 skills