x402 paid APIs: MCP servers, A2A agents and x402 APIs

Pay-per-call HTTP APIs that accept x402 payments (USDC), callable by agents with no account or API key. 1362 listings in the Rooms directory, 1352 answering our latest daily check. Each one links to its endpoint, how to call it and its live status.

uptime.cyberwarex.com Live x402
Fleet-wide uptime statistics for every monitored endpoint: uptime percentage, average response time, and total check count over 1, 7 and 30 day windows (plus an optional custom window). Use it to get an at-a-glance reli…
x402 paid API · 1 endpoint
url-uptime-checker.underscoredone.com Live x402
Checks whether a website or web address is currently reachable and reports how fast it responded.
x402 paid API · 1 endpoint
url2md.io Live x402
PDFs, JavaScript pages and ordinary HTML as clean Markdown. Pays a page's x402 toll for you. Follows robots.txt.
x402 paid API · 1 endpoint
url.openverbs.com Live x402
Two directions over query strings. action='parse' decodes a query string (with or without a leading '?') into an object, collapsing repeated keys into arrays. action='build' encodes a params object into a query string,…
x402 paid API · 4 endpoints
us-cm-kg.ai Live x402
One paid call on us-cm-kg.ai for $0.01 USDC: the surface's own statement of record (a market node: its list_nodes line; a product: its record of record; allooloo.io: the estate scale block), public-record only, with an…
x402 paid API · 1 endpoint
usenami.io Live x402
Funding rates per venue for one crypto perpetual, or the whole cross-venue set in one call. Major CEX and DEX venues — Binance, Bybit, OKX, Bitget, Gate.io, KuCoin, Hyperliquid, Paradex, Orderly, Lighter and more. Each…
x402 paid API · 9 endpoints
uuid-forge.saastemly.com Live x402
Returns 1-100 random UUID v4 strings (RFC 9562): ?count=1..100 (default 1), ?format=uuid|urn|hex|int (default uuid). (2 paid endpoints on uuid-forge.saastemly.com.)
x402 paid API · 2 endpoints
Validate Agent Live A2A
Security and data-quality guardrails for AI agents. Stop prompt injections before they reach your LLM. Strip PII to stay compliant. Sanitize untrusted HTML without installing dependencies. Validate emails, URLs, JSON sc…
A2A agent · Validate Agent · 12 skills
vape-x402.vapex402.workers.dev Live x402
VAPE dex_volumes — DEX trading volume on a chain by venue, each with its logo (default Base) — real trading activity across the chain's exchanges. (15 paid endpoints on vape-x402.vapex402.workers.dev.)
x402 paid API · 12 endpoints
vaults.fyi Live x402
Retrieves a filtered list of vaults with their basic information including address, network, associated asset details, and transactional support status. (6 paid endpoints on api.vaults.fyi.)
x402 paid API · 6 endpoints
vaunt-dispatch-production.up.railway.app Live x402
True cost of trading xyz:COIN on Hyperliquid, measured on Vaunt's own IOC taker orders: slippage vs mid (p50/p90 bps), taker fee paid, wall-clock to fill, fill rate, against the venue-class median, plus spread, round-tr…
x402 paid API · 12 endpoints
vealth.net Live x402
Work tCO2e Accounting (CDP-settled mirror) — ecological accounting guidance from the production settle-to-retire mapping for a work type. NOT a credit, NOT a retirement.
x402 paid API · 1 endpoint
vedetta.dethboy.com Live x402
Recent analyst desk posts as a stream (?since_id=&asset=&limit=): cached, instant, half a cent. Poll it cheaply; escalate to a live read when something moves. Descriptive research, not financial advice. (3 paid endpoint…
x402 paid API · 3 endpoints
vending-machine-seven.vercel.app Live x402
Public URL status, latency, and response header subset for uptime and health agents (10 paid endpoints on vending-machine-seven.vercel.app.)
x402 paid API · 10 endpoints
vendsdk.com Live x402
Follow a public redirect chain with per-hop HTTP status (SSRF-safe) for security agents (14 paid endpoints on vendsdk.com.)
x402 paid API · 12 endpoints
vennatta-core.onrender.com Live x402
Extract structured text, summaries, or metadata from supplied document text or a public HTTP(S) document URL. (3 paid endpoints on vennatta-core.onrender.com.)
x402 paid API · 3 endpoints
VERIDEX Live MCP
Verify Spanish companies by CIF: registry data, status and BORME filings, paid per call over x402.
MCP server · es.veridexia
Vérif Entreprise FR Live MCP
French company checks (SIREN): status, insolvency, VAT (VIES), RGE. Free preview; x402 pay-per-call.
MCP server · app.railway.up.api-production-24833
Verifi Live MCP
Get a real human to verify, decide, or improve an AI agent's work. Pay per review via x402 on Base.
MCP server · cloud.verifi
verifiable-random.use.x402atlas.com Live x402
Verifiable Random pick — string selection with or without replacement bound to a future drand round the server waits for (typically 3-6s) and verifies locally, with a reproducible proof transcript. (3 paid endpoints on…
x402 paid API · 3 endpoints
verifier.quantumshieldlabs.dev Live x402
Classify a caller-supplied operation claim against caller-supplied evidence under deterministic rules and return a machine-readable handoff receipt. Use this when an orchestrator needs a consistent completion state befo…
x402 paid API · 2 endpoints
verify.clearsigned.com Live x402
Clearsigned — the trust layer with no stake in the outcome. Submit {claim, evidence[]}, receive an Ed25519-SIGNED, evidence-bearing receipt (verify offline against GET /pubkey; every receipt is chained in the public led…
x402 paid API · 1 endpoint
VerifyPulse Email Verification & DNS Security Live MCP
Real-time RFC 5322 email verification, SPF/DMARC DNS audits & B2B leads (x402 Base USDC).
MCP server · io.github.MohDev212
Verse Live A2A
Verse helps with hard questions in AI capabilities, markets, geopolitics, and science. Ask a concrete question, approve a small USDC payment on Base, and get a signed probability estimate or analysis.
A2A agent · Verse (autonomous agent) · 7 skills
Vextorium Live MCP
517 pay-per-call data tools: on-chain (30+ chains), DeFi, markets, stats, compliance. Pay via x402.
MCP server · com.vextorium.api
vibesprings.net Live x402
Real-time BTC/USD price feed oracle. Retrieves live spot rate, 24h high/low, and volume directly from Coinbase Exchange. (25 paid endpoints on vibesprings.net.)
x402 paid API · 12 endpoints
visual.hugen.tokyo Live x402
Screenshot any public URL — returns base64 JPEG/PNG with metadata (page title, file size, render time). Full-page scroll capture, CSS selector targeting, device emulation (iPhone 15 Pro, Pixel 7, iPad Pro 12.9), dark mo…
x402 paid API · 4 endpoints
visuals.use.x402atlas.com Live x402
QR code generator — encode text, URLs, payment URIs, or arbitrary UTF-8 data as base64-encoded SVG or PNG in a JSON envelope. (2 paid endpoints on visuals.use.x402atlas.com.)
x402 paid API · 2 endpoints
VouchSpec Agent Skill Evidence Live A2A
Agent-only discovery for fresh, exact-commit Agent Skill validation. Returns machine-readable x402 purchase and signed-receipt instructions; the A2A call itself is free and read-only.
A2A agent · Plyrium · 1 skill
vrsai.tech Live x402
Check an exact npm or PyPI package version immediately before installation using current registry, vulnerability, malicious-package, withdrawal/deprecation, and verified provenance evidence. Returns ALLOW, REVIEW, BLOCK…
x402 paid API · 1 endpoint
watchevelive.com Live x402
Eve’s RWA print: which official number is the actual (T-bill, gold, NAV). Call for official prints, not casino coins. (3 paid endpoints on www.watchevelive.com.)
x402 paid API · 3 endpoints
waterpulse.theaslangroupllc.com Live x402
Live USGS river-gauge tick, deterministic. Answers "what is the flow at this gauge right now", "is this river high or low vs this week". Returns the latest streamflow (discharge, cfs) and gage height (ft) for one USGS s…
x402 paid API · 1 endpoint
wazir-x402.duckdns.org Live x402
PoolTogether draw-schema — volgende draw op Base/Arb/OP/Scroll (4 paid endpoints on wazir-x402.duckdns.org.)
x402 paid API · 4 endpoints
weather.agentic-jp.com Live x402
List every JMA forecast office (府県予報区) in Japan with its code, Japanese/English name, and class10 sub-regions. Use this to discover valid `:area` values.
x402 paid API · 1 endpoint
weather.cyberwarex.com Live x402
Weather forecast for a location (global, keyless): current conditions, an hourly series (up to 48h) and a daily summary (up to 10 days: min/max temp + condition), from met.no. Pass lat+lon, or a place name. For travel,…
x402 paid API · 1 endpoint
weather.hugen.tokyo Live x402
Instant weather by city name — temperature, feels-like, humidity, wind speed, precipitation, and condition. Just pass a city name; geocoding, data fetching, and response structuring are handled in one call. Global cover…
x402 paid API · 2 endpoints
web-production-18a32.up.railway.app Live x402
Current weather conditions by city or place name. (5 paid endpoints on web-production-18a32.up.railway.app.)
x402 paid API · 5 endpoints
web-scraper-api-production-bf20.up.railway.app Live x402
Extract page metadata: title, description, keywords, author, published/modified dates, canonical, language, favicon, and OpenGraph/Twitter card tags. (3 paid endpoints on web-scraper-api-production-bf20.up.railway.app.)
x402 paid API · 3 endpoints
webbersites.com Live x402
ANTHROPIC-COMPATIBLE /v1/messages — Claude Haiku 4.5 through the exact Anthropic API dialect: same request/response shape, no Anthropic account, the x402 payment IS the auth. Point an Anthropic SDK's base_url at https:/…
x402 paid API · 12 endpoints
web.cyberwarex.com Live x402
Read any live web page as clean, LLM-ready text. Renders JavaScript in a real browser, then strips navigation, ads and boilerplate. Use it when a plain HTTP GET returns empty or garbled HTML: single-page apps, dynamic f…
x402 paid API · 5 endpoints
web.openverbs.com Live x402
Fetch a site's robots.txt and evaluate crawl permissions: given a URL (plus optional extra paths) and a user-agent, return whether each path is allowed or disallowed, the rule that matched, the user-agent group, the cra…
x402 paid API · 9 endpoints
web.tollkit.dev Live x402
PDF to text: give a PDF URL, get the text of every page with the title, author and page count. For RAG, research and summarizing reports, filings and papers. (6 paid endpoints on web.tollkit.dev.)
x402 paid API · 6 endpoints
weight402endpoint.vercel.app Live x402
Convert a weight/mass value between units (kg, g, lb, oz, stone, tonne, and more).
x402 paid API · 1 endpoint
wetter.halowerk.com Live x402
Single models are everywhere. This is the disagreement between them: per hour a median with a p15/p85 band, the full min/max spread, how many models still carry that hour, an agreement score, rain probability derived fr…
x402 paid API · 2 endpoints
Wever Labs Agent Products Live MCP
Agent commerce: 27 tools, 10 production services, signed authority, planning, Base USDC x402.
MCP server · io.github.CodeWever
What Agents Buy Live MCP
Independent measured reviews of x402 API sellers: pre-payment verdicts and accuracy grades.
MCP server · com.whatagentsbuy
whitemagic.dev Live x402
WhiteMagic continuity-receipt verification: POST a signed receipt bundle and receive a verdict (TRUSTED / PROVISIONAL / INSUFFICIENT_EVIDENCE / UNTRUSTED) with coded errors and an optional signed verification receipt. V…
x402 paid API · 1 endpoint
wikidata.openverbs.com Live x402
Fetch a Wikidata entity by Q-id: label, description, aliases and its claims (property → values). (2 paid endpoints on wikidata.openverbs.com.)
x402 paid API · 2 endpoints

Related capabilities

On-chain data Trading & markets AI models & inference Agent infrastructure Research Maps & travel Security & trust Crypto market data

How to use one

MCP servers plug into Claude, ChatGPT, Cursor and other AI clients; A2A agents take tasks over JSON-RPC; x402 APIs charge per call in USDC with no account. Guides: A2A vs MCP · How to call an A2A agent · x402 for agents.

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