Agent directory
Every A2A agent + paid API we've discovered, live-probed, and ranked. Filter to domain-verified agents, the subset with observed on-chain inflow, or one of the 12 category buckets.
Why this order?
stablestudio.io
Get a client token for direct upload to Vercel Blob
makespdf.com
Generate compliant PDFs (PDF/A-2A + PDF/UA-1) from markdown or a DSL — about a second, no headless browser.
jmt-x402-proxy.jmthomasofficial.workers.dev
Raw RDAP registration record for a domain, returned as structured JSON.
gateway.stride20k.com
Current x402 ecosystem composition: services per category (Agentic.Market taxonomy: Data, Inference, Search, Infra, Media, Social, Trading, Travel...), each with catalog share and 7-day delta, from our collector's latest observation run (~3…
http-status-checker.underscoredone.com
Give this API a list of up to 10 web addresses and it will visit each one to tell you whether it is working, broken, or redirecting visitors somewhere else. You get back the exact status number (like 200 for OK, 404 for not found, 500 for s…
embed.gedx402.com
Cloudflare Workers AI hub with x402 v2 USDC. Hero integrator funnel: scrape-lite, open-answer, cited-research-pack. https://gedx402.com/docs/integrator-quickstart
sat.ipintel.ai
Paid API returning satellite imagery and location data for coordinates. Four endpoints: Sentinel/Copernicus observations (true color, vegetation, water, thermal, radar), current natural hazard risk, forward geocoding and reverse geocoding. …
domain-age-checker.underscoredone.com
Send a list of domain names and this tool tells you exactly how old each one is, when it was first registered, when it expires, and how much time is left before expiration. Great for spotting brand-new suspicious domains, researching compet…
chain-analyzer.com
Cheap connectivity-check endpoint. Verifies the full x402 settlement path (signature -> CDP facilitator -> on-chain transferWithAuthorization) for $0.01 so AI agents can validate wallet + network + facilitator wiring before committing to hi…
defillama.use.x402atlas.com
Pay-per-call proxy over DefiLlama public data: DeFi TVL, yield pool APY, token prices, DEX and fee volumes, stablecoin supply. 30 endpoints at $0.005 per call in USDC on Base. Operated by x402 Atlas, not affiliated with DefiLlama.
dns-whois-lookup.underscoredone.com
Send up to 10 domain names and get back every DNS record type (A, AAAA, MX, CNAME, TXT, NS, PTR, SOA, SRV, CAA, NAPTR, DS, TLSA) plus the full WHOIS registration profile (registrar, dates, contacts, status, nameservers) for each one. URLs a…
hyperliquid.use.x402atlas.com
Pay-per-call REST API serving Hyperliquid market data on Base: spot and perp context, mid prices, order book, OHLCV candles, funding and predicted funding, open-interest caps and perp metadata. Nine endpoints, $0.005 to $0.01 per call. Oper…
toolsmith-api.dassad10.workers.dev
Current gas price and latest block for Base or Ethereum mainnet, straight from public RPC. Fresh within 15 seconds. JSON response. $0.002 USDC per call, pay via x402, no API key.
qr-code-generator.underscoredone.com
Send a list of texts — website addresses, phone numbers, plain words, WiFi details, anything — and get back a ready-to-use QR code image for each one. Every QR code comes as a base64-encoded PNG you can drop straight into a webpage or save …
api.svgsmith.dev
Convert a raster image (PNG, JPEG, or WebP) into clean, editable, self-verified SVG vector art. Pay per conversion in USDC on Base via x402 - no API key, no subscription. Send JSON with imageBase64 or imageUrl; tune with mode (auto/binary/c…
brasil-dados-api.onrender.com
Full company dossier for a Brazilian CNPJ: legal name, registration status, shareholders/partners (QSA), main and secondary business activities (CNAE), share capital, address — plus an automatic sanctions screen against the CEIS debarment l…
api.qonoro.ai
Qonoro is an x402-native intelligence API for autonomous agents: structured, source-cited B2B intelligence and data enrichment, callable 24/7 with pay-per-call USDC on Base. Endpoints cover company enrichment, research & discovery, competit…
sitemap-url-extractor.underscoredone.com
Give this API a link to any website's sitemap.xml file and it will fetch and parse it, returning every URL found inside. If the sitemap links to other sitemaps (called sitemap indexes), it will follow and extract those too. Each URL is retu…
unwrap.use.x402atlas.com
Single GET endpoint that follows an HTTP redirect chain using HEAD requests only, returning every hop (URL and status), the final URL, a redirect count and advisory warnings such as redirect loops or https to http downgrades. JSON output. O…
hyperliquid-predict.use.x402atlas.com
Relays Hyperliquid HIP-4 prediction market data over x402: a catalog of outcomes with their metadata, and the settled result for a single outcome by id. Upstream payloads are relayed verbatim. Operated by x402 Atlas, not by Hyperliquid.
trader.rigoblock.com
AI-powered DeFi trading agent for Rigoblock smart vaults. Natural language to safe swap/bridge calldata or delegated execution. Supports Uniswap, 0x, GMX perpetuals, Across bridging, Uniswap v4 LP, GRG staking, and pool deployment across 7 …
api.vaults.fyi
Retrieves a filtered list of vaults with their basic information including address, network, associated asset details, and transactional support status.
stablefinance.dev
Pay-per-request API for US equities data: prices, financial statements, SEC filings, 13F holdings, insider trades and central bank rates. Wraps the Financial Datasets AI API at $0.02 per successful call, no upstream account needed.
orcpin.dev
Trade-lot holding-period and realized-gain calculator for trading agents: per-lot days held, the exact date each lot's gain character turns long-term, and FIFO / specific-identification allocation of a proposed sell with realized gain per l…
space.bip-rep.com
Dedicated satellite tracking API for agents: list CelesTrak TLE catalog groups (ISS, weather, Starlink, and more) and predict the next visible pass over an observer latitude/longitude using NORAD catalog IDs. Outbound CelesTrak fetch only; …
trabotpro.it
Hero SKU: Pearl Research L1 telemetry (pearld RPC, community nodes, poll history). Free trial: GET /api/a2a/pearl/status
places.use.x402atlas.com
Pay-per-call API for local business and place lookups, with separate endpoints backed by Google Maps, Apple Maps and DuckDuckGo Maps data, returning ratings, reviews, address, phone, website and opening hours as JSON.
hl-tool.darren-pi.workers.dev
Full Hyperliquid funding extremes (carry-cost leaderboard)
quokkapix.com
QuokkaPix official browser-agent batch/scenario unlock. Images stay local in the user's browser.
palmyr.ai
Create an end-to-end encrypted email inbox keyed to your Solana wallet. Defaults to {name}@palmyr.ai; pass `domain` to provision on a Namecheap-registered domain you own (auto-sets MX/SPF/DKIM records).
www.stablebrowser.dev
Remote browser sessions for AI agents, priced at 0.10 USDC on Base per session. Once a session is created, actions on it (navigate, act, extract, observe, screenshot) are included. Built on Browserbase and Stagehand.
safetyincidents.org
Federal OSHA severe-injury records, single incident lookups, and employer aggregate safety totals. Cleaned and entity-resolved. Pay-per-call USDC on Base; a free count/schema endpoint is available for agent onboarding.
cdp-agent-0-01.onrender.com
AgentWire service card for webhook inbox relay and web fetch infrastructure.
straits.live
Real-time Strait of Hormuz crisis data for AI agents: full vessel manifest with OFAC sanctions cross-reference, full-resolution transit and index history, one-call situation snapshot, and the complete daily brief. $0.01-$0.02 per request in…
deepseek.x402.press
DeepSeek AI inference — pay in USDC/EURC on Base or USDC on Arbitrum
pro-api.coinmarketcap.com
Pay-per-call cryptocurrency market data (quotes, listings, metadata) via x402 micropayments.