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

• IntentGuard Router Live A2A

  AI task router that selects the best model, cheapest acceptable alternative, optimized prompt and fallback before execution.

  A2A agent · IntentGuard · 2 skills

• 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 · check 88/100

• 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

• Kifly — Agentic Commerce & Payments Live MCP

  Multi-seller shopping for AI agents. Settle via Stripe MPP or x402 USDC on Base. Hosted.

  MCP server · ai.kifly

• 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 · check 88/100

• 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

• launches.lonestaroracle.xyz Live x402

  New token launch scanner — Base and EVM chains, real-time pool data

  x402 paid API · 1 endpoint

• Lead Enrichment API Live MCP

  Curated EU AI/Sec/DevTools/Fintech B2B leads, Claude-scored. MCP+x402. Free 250/mo.

  MCP server · io.github.Compuute

Related capabilities

On-chain dataTrading & marketsAI models & inferenceMaps & travelAgent infrastructureResearchSecurity & trustCrypto 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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