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. 1222 listings in the Rooms directory, 1212 answering our latest daily check. Each one links to its endpoint, how to call it and its live status.

immuta.app Live x402
Latest PulseChain block number and timestamp.
x402 paid API · 1 endpoint
insider.lonestaroracle.xyz Live x402
Insider trades — SEC Form 4 buys and sells by officers and directors for any ticker
x402 paid API · 1 endpoint
insumermodel.com Live x402
Signed attestation (ECDSA plus a post-quantum ML-DSA-65 companion) of on-chain wallet conditions across 37 chains: token balance, NFT ownership, EAS, Farcaster, view calls, ratio rules, account code (plain key, EIP-7702…
x402 paid API · 3 endpoints
intel.chainquery.com Live x402
ChainQuery Bitcoin Intelligence: independent Bitcoin-native on-chain data over x402, no API key. Live mempool fee-pressure signal (state low/moderate/high/severe + score in sat/vB). (5 paid endpoints on intel.chainquery…
x402 paid API · 5 endpoints
interzoid.com Live x402
Generate an AI-powered similarity key for individual/person name matching. Handles variations like 'Bob Smith', 'Robert Smith', 'Smith, Robert J.' producing the same key for matching and deduplication. (15 paid endpoint…
x402 paid API · 12 endpoints
invoket.com Live x402
Before your agent advises on EU compliance or cites EU law: check an act or article is in force at a given date, by CELEX or ELI identifier — consolidated text, status, validity dates and the staggered date it becomes A…
x402 paid API · 12 endpoints
ioswarm.io Live x402
Live quotes for up to 8 symbols — stocks, ETFs, crypto pairs (BTC-USD), FX — price, session change and currency, in the paid response. $0.01 per call, no account. (32 paid endpoints on ioswarm.io.)
x402 paid API · 12 endpoints
iot.halowerk.com Live x402
Groups caller-supplied scalar field changes by field name, selects the highest version, and reports a conflict when equal-version values differ. It does not connect to a twin platform, merge nested documents or resolve…
x402 paid API · 10 endpoints
ip-geo-api-production.up.railway.app Live x402
Geolocate an IPv4/IPv6 address: country, region, city, postcode, lat/lng, timezone, ISP, org, ASN, and a datacenter heuristic. (4 paid endpoints on ip-geo-api-production.up.railway.app.)
x402 paid API · 4 endpoints
ip402.xyz Live x402
Paid IP intelligence endpoint returning normalized geolocation and ASN data for a single IPv4 or IPv6 address.
x402 paid API · 1 endpoint
ip.halowerk.com Live x402
Inspect one IP address for network ownership, location and abuse signals. (2 paid endpoints on ip.halowerk.com.)
x402 paid API · 2 endpoints
iposignal-dashboard-372lo399x-waltermelonlangs-projects.vercel.app Live x402
Full IPO company profile with AI research, valuation analysis, and deal terms
x402 paid API · 1 endpoint
iposignal.xyz Live x402
IPOSignal Sentiment Score — proprietary daily signal measuring investor appetite for new listings (5 paid endpoints on iposignal.xyz.)
x402 paid API · 5 endpoints
isocast.dev Live x402
Latest observed weather signal for one city — a single-signal SPOT snapshot (like a market-data quote). Flat $0.01, payable by a STOCK x402 client (no binding nonce). Never returns history or more than one signal. Uncha…
x402 paid API · 1 endpoint
israel-counterparty-intelligence.vercel.app Live x402
Monitor recent official Israeli company-registry changes for an exact nine-digit company number. Returns filing and status-change events newest first, with dates, deterministic categories, source URLs, and checked_at. U…
x402 paid API · 1 endpoint
itsgloria.ai Live x402
Get a 24-hour news summary for a specific token/ticker, combining internal news data with web search results. Returns decision-grade bullet points for fund managers and trading agents. (5 paid endpoints on api.itsgloria…
x402 paid API · 5 endpoints
japan-business-day-api.matchan962.workers.dev Live x402
Japanese traditional calendar for a date: rokuyo (taian/butsumetsu... lucky days used for weddings, funerals, contracts), Japanese era (Reiwa) date, old lunisolar calendar date incl. leap months, 24 solar terms (sekki)…
x402 paid API · 10 endpoints
jarvisclaw.ai Live x402
Returns recent cryptocurrency headline metadata and sentiment. (18 paid endpoints on api.jarvisclaw.ai.)
x402 paid API · 12 endpoints
jmt-x402-proxy.jmthomasofficial.workers.dev Live x402
Raw RDAP registration record for a domain, returned as structured JSON. (6 paid endpoints on jmt-x402-proxy.jmthomasofficial.workers.dev.)
x402 paid API · 6 endpoints
jmthomasofficial.com Live x402
Company intelligence lookup: resolve a US-listed company ticker through the SEC EDGAR company ticker dataset. Returns CIK, ticker, and registrant name for company research, SEC filing discovery, and equity due diligence.
x402 paid API · 1 endpoint
jokes-endpoint.vercel.app Live x402
Get a random interesting joke. Secured with x402 payment protocol on Base mainnet.
x402 paid API · 1 endpoint
joyful-charm-production-bf6d.up.railway.app Live x402
Aggregate insider-trading market statistics: total Form 4 trades tracked, trades in the last 24h, top 20 most-traded tickers and top 20 most-active insiders by filing count and dollar volume. A one-call overview of wher…
x402 paid API · 5 endpoints
jp-cm-kg.ai Live x402
One paid call on jp-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
json-suite.underscoredone.com Live x402
Every agent and developer hits broken or confusing JSON. This tool handles the common headaches in one place: check whether JSON is valid with the exact error location, repair near-JSON with typos, pretty-print or minif…
x402 paid API · 1 endpoint
jsonrecon.com Live x402
Return the Schema.org structured data already published on a public web page. Navigation-only results are marked low information so agents can choose Full extraction. $0.005 USDC per successful request on Base. Call /ch…
x402 paid API · 3 endpoints
k-data-x402-production.theblack1022.workers.dev Live x402
Current USD/KRW exchange rate (ECB reference via Frankfurter, fallback open.er-api.com). (2 paid endpoints on k-data-x402-production.theblack1022.workers.dev.)
x402 paid API · 2 endpoints
kaisha-api.hp-vladic.workers.dev Live x402
Japanese business-day calculator: check if a date is a business day, add N business days to a date, or count business days in a range. Accounts for weekends and Japanese national holidays; optional Saturday and year-end…
x402 paid API · 2 endpoints
kalender.netzhandwerker.de Live x402
Für Zahlungsziele, Fristen und Liefertermine. Die Antwort nennt das Ergebnisdatum, die Zahl der Kalendertage und jeden übersprungenen Tag mit Grund.
x402 paid API · 1 endpoint
kari.mayim-mayim.com Live x402
Observed Surface Comparison Facts API (4 paid endpoints on kari.mayim-mayim.com.)
x402 paid API · 4 endpoints
karte.halowerk.com Live x402
Queries OpenStreetMap for charging stations within a radius of a point and returns each with its position, distance, operator, network, connector types with their individual power ratings and socket counts, access restr…
x402 paid API · 4 endpoints
keenable.ai Live x402
Keenable web search for AI agents: ranked results with title, URL and snippet for a natural-language or keyword query. Pay per request, no API key. (2 paid endpoints on api.keenable.ai.)
x402 paid API · 2 endpoints
kenoodl.com Live x402
x402-preflight: confirm your wallet can transact, and see your balance, in one certified call. Pay $0.01 USDC on Base, get a signed on-chain-anchored receipt. The safe first transaction before you ship real volume.
x402 paid API · 1 endpoint
kette.halowerk.com Live x402
Checks one address on Ethereum, Base, Arbitrum, Optimism, Polygon or BNB Smart Chain against the open verification registry and against the chain itself. For a proxy the answer is deliberately split in two: whether the…
x402 paid API · 2 endpoints
kevinhoff.com Live x402
X Preflight: read a draft post against X's open-sourced ranking code. Returns what is already settled before you post, whether it enters the pool strangers are drawn from, how long it stays retrievable, which filters de…
x402 paid API · 1 endpoint
keyronne.com Live x402
Compute cryptographic digests and HMACs deterministically: MD5, SHA-1, SHA-256, SHA-384, SHA-512, output as hex, base64, or base64url. Add a "key" for HMAC. Built for checksums, content addressing, and signature verific…
x402 paid API · 12 endpoints
kgninja.dev Live x402
KG-NINJA Agent Error Fix Receipt (2 paid endpoints on api.kgninja.dev.)
x402 paid API · 2 endpoints
kino402.com Live x402
UGC product video prompt: the compiled prompt and render plan for a 5s 9:16 energetic spot on seedance-1.5-pro (9 paid endpoints on kino402.com.)
x402 paid API · 9 endpoints
klima.halowerk.com Live x402
Selects and applies a supplied published CBAM default factor for a goods group. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed va…
x402 paid API · 3 endpoints
klimalabs.com Live x402
Entry point to the x402 Carbon Retirement API on Base. Returns every endpoint you need plus a live snapshot of the top 3 carbon classes and marketplace listings by liquidity. Discover, quote and certificate are free. Re…
x402 paid API · 1 endpoint
kr-cm-kg.ai Live x402
One paid call on kr-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
kronossignals.com Live x402
Crypto funding-rate extremes screener: scans all 17 perpetual futures markets (BTC/ETH/SOL/BNB/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/TRX/BCH/ATOM/NEAR/APT/HYPE). Uses z-score (30-day baseline) to identify statistically extreme…
x402 paid API · 12 endpoints
kyp-model.ai Live x402
One paid call on kyp-model.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
labor.lonestaroracle.xyz Live x402
US labor-market signal (jobs, unemployment, wages, JOLTS)
x402 paid API · 1 endpoint
lab.paidapis.net Live x402
Aggregated market snapshot: Ethereum mainnet gas price (Gwei), ETH/USD spot price, and the latest Base mainnet block number and timestamp — combined into one call. Optional ?ref=<address> pays that wallet a 20% referral…
x402 paid API · 7 endpoints
ladyfortunalx402.vercel.app Live x402
Get a random fortune via x402 payment on Base mainnet.
x402 paid API · 1 endpoint
lastlookdata.com Live x402
LastLook Data — current 30-year US Treasury yield (DGS30). Alias for /api/current?id=DGS30. (4 paid endpoints on api.lastlookdata.com.)
x402 paid API · 4 endpoints
latitude10.tech Live x402
Meridian: a design system for SaaS products people use all day: admin consoles, CRMs and internal tools. Calm, neutral and precise: Manrope headlines over Inter, Meridian Teal with one Burnt Amber accent, tone rather th…
x402 paid API · 2 endpoints
lauf.halowerk.com Live x402
Loads a public https page, finds the requested form, fills your values into it in a real headless browser and reports what a submission would run into — without submitting. Each field is checked against what the page it…
x402 paid API · 7 endpoints

Related capabilities

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

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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