x402watch

52,778 paid endpoints are listed. 41,522 answered a real 402 at the last check.

Every x402 endpoint on the Coinbase Bazaar and x402scan, probed unpaid every six hours. A listing tells you the price a seller wrote down. This tells you whether the endpoint is reachable, whether it charges what it declared, and how fast it answers. Ranked by an assay score out of 100.

Last check 2026-11-14 06:38 UTC · 52,778 probed

41,522 answering 4025,071 down5,452 rejecting733 no paywall944 price drift
  1. 100squeezeos-api.onrender.com/citegate/auditCiteGate citability audit API — audit a public web page for AI citability with a deterministic 0-100 rubric covering page evidence and robots AI-crawler policy, with plain-language fixes.$0.01 Base290 ms3 payers100% up
  2. 100quickbuild.quynguyenbac.workers.dev/api/base/walletBalances of one address on Base mainnet in a single call: native ETH, the well-known tokens USDC, USDT, USDbC, DAI, WETH, cbETH, wstETH, AERO (non-zero only, or all with includeZero=true), plus up to 10 extra ERC-20 contracts you pass in `tokens` (symbol/name/decimals read on-chain). Also nonce, account type (EOA, EIP-7702 delegated EOA, or contract) and a USD total for ETH/WETH (Chainlink) and stablecoins. Read live from public Base RPC via Multicall3; cached 10 s. All params optional:...$0.002 Base43 ms3 payers100% up
  3. 100quickbuild.quynguyenbac.workers.dev/api/base/txLook up one transaction on Base mainnet by hash: status (success, failed or pending), block, timestamp, confirmations, from/to, value, method id, gas used, effective gas price, fee split into L2 execution and L1 data fee (ETH and USD), contract created, and decoded ERC-20 Transfer events (token, symbol, from, to, amount; up to 20). Useful to confirm a payment landed. Read live from public Base RPC. All params optional: defaults to a confirmed USDC x402 payment. Unknown hash = 404, invalid...$0.002 Base57 ms3 payers100% up
  4. 100api.healthtravel-api.workers.dev/api/health/cpt-hcpcs-procedureHCPCS Level II billing code search (CMS code set, via NLM Clinical Tables): code and short description for procedures, supplies and drugs, with total match count. CPT codes are AMA-licensed and not included. Up to 20 codes per call.$0.002 Base29 ms3 payers100% up
  5. 100api.healthtravel-api.workers.dev/api/travel/plugshareEV charging stations near a point. Primary source OpenStreetMap (Overpass): name, operator, network, socket types, capacity, access, hours. For US points when Overpass is unavailable, the US DOE/NREL Alternative Fuel Stations directory is used instead. PlugShare itself has no public API, so its reviews and live status are not included.$0.002 Base51 ms3 payers100% up
  6. 100api.healthtravel-api.workers.dev/api/travel/agodaTop hotels in a city from Agoda's city guide page (no dates needed): about 10 properties with Agoda hotel ID, name, star rating, area, amenities (Wi-Fi, parking, breakfast, pool …), review score out of 10 with its label and number of reviews, a recent guest quote, average price per night with currency, and the Agoda hotel link. The city is Agoda's URL slug, e.g. bangkok-th, tokyo-jp, bali-id, london-gb.$0.002 Base35 ms3 payers100% up
  7. 100api.healthtravel-api.workers.dev/api/travel/greatschoolsUS schools in a city from GreatSchools: name, GreatSchools rating (1-10) and label, sub-ratings (test scores, student progress, equity...), school type (public, charter, private), grade levels, district, address, enrollment, students per teacher, % low-income, parent rating and review count, coordinates and profile URL, plus the total number of schools. Filter by level (preschool, elementary, middle, high) and type; 25 per page, best rated first.$0.002 Base32 ms3 payers100% up
  8. 100api.healthtravel-api.workers.dev/api/travel/flightaware-public-trackerPublic FlightAware flight page for one flight number: airline, aircraft type, origin and destination airports (IATA, name), status (e.g. arrived, en route) and the flight ident. Read from the JSON embedded in the public page; no login. Live altitude and speed are not included on the page used.$0.002 Base36 ms3 payers100% up
  9. 100api.healthtravel-api.workers.dev/api/travel/hk-mtr-realtimeHong Kong MTR realtime next-train arrivals at one station on one line, from the Hong Kong government open data feed: direction, destination platform, minutes to next train (ttnt) and scheduled time. Times are the feed's; the feed can be delayed or empty late at night.$0.002 Base28 ms3 payers100% up
  10. 100api.healthtravel-api.workers.dev/api/travel/google-travelGoogle Travel hotels and vacation rentals for a place (about 20, Google's order): name, type, lowest price and currency (Google picks currency by server region), deal flag and % below usual, guest rating with review count and star distribution, hotel class, amenities, topics guests mention, eco-certified flag and link. Optional stay dates; otherwise Google's default dates (returned).$0.002 Base27 ms3 payers100% up
  11. 100api.healthtravel-api.workers.dev/api/travel/seat61-routesSeat61 train route guide for a city pair (e.g. london to paris): guide title, section headings and its timetable and fare tables as rows of cells, plus the guide URL, from seat61.com. Tables only, not the guide's prose; timetables are Seat61's summaries, check the operator before travel.$0.002 Base56 ms3 payers100% up
  12. 100api.healthtravel-api.workers.dev/api/travel/france-annuaire-entreprisesSearch French companies and establishments in the official Annuaire des Entreprises (SIRENE data): SIREN, full name, head-office address, main activity code (NAF) and active state. Public register data only; no financial statements.$0.002 Base31 ms3 payers100% up
  13. 100api.healthtravel-api.workers.dev/api/travel/numbeoNumbeo cost-of-living prices for one city from its public page: item label and the crowd-sourced price with currency symbol (e.g. meal at an inexpensive restaurant, one-way ticket). Prices are user-submitted estimates, not official.$0.002 Base45 ms3 payers100% up
  14. 100api.healthtravel-api.workers.dev/api/travel/nhtsa-vehicle-complaintsUS NHTSA owner-filed vehicle complaints for a make, model and model year: incident date, components, summary, crash/fire flags and injury counts. Complaints are unverified owner reports; the total count is NHTSA's, the returned list is a slice.$0.002 Base50 ms3 payers100% up
  15. 100api.healthtravel-api.workers.dev/api/travel/mbta-realtimeLive MBTA Boston vehicle positions for one route (e.g. Red, Orange, Blue, 1): vehicle label, latitude/longitude, bearing, speed, current status, current stop id and occupancy when reported. Anonymous access is rate limited by MBTA.$0.002 Base35 ms3 payers100% up
  16. 100api.healthtravel-api.workers.dev/api/travel/nhtsa-vehicle-recallsUS NHTSA safety recalls for a make, model and model year: campaign number, component, summary, report date and remedy flags, as published by NHTSA. Recalls only; no VIN lookup and no recall status (open/closed).$0.002 Base28 ms3 payers100% up
  17. 100quickbuild.quynguyenbac.workers.dev/api/fx/rateForeign-exchange rates from one base currency (`from`, default USD) to a list of currencies (`to`, comma-separated, or "all"; default 14 majors incl. EUR, GBP, JPY, CNY, INR, KRW, VND), with `amount` converted. Live mode uses Coinbase public exchange rates (updated about every minute, 160+ ISO 4217 currencies plus XAU/XAG), falling back to exchangerate-api daily rates. With `date=YYYY-MM-DD` it returns the ECB reference rates for that day (Frankfurter, ~30 major currencies, back to...$0.002 Base45 ms3 payers100% up
  18. 100http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/dns/snapshotFetch one bounded public DNS snapshot for A, AAAA, CNAME, MX, NS, SOA and TXT in a single call. Forest uses a fixed public DNS-over-HTTPS resolver, distinguishes answers, NODATA, NXDOMAIN and per-type resolver errors, and marks mixed trustworthy/error outcomes as partial instead of converting resolver failure into an empty DNS result. Base mainnet USDC$0.002 Base157 ms3 payers100% up
  19. 100quickbuild.quynguyenbac.workers.dev/v1/embeddingsDrop-in OpenAI Embeddings endpoint: POST {input: string | string[], model, encoding_format: float|base64, dimensions} and get {object: "list", data: [{embedding, index}], model, usage}. Models (Cloudflare Workers AI): bge-m3 (1024-d, multilingual (100+ languages), 8192-token context); bge-large-en-v1.5 (1024-d, English); bge-base-en-v1.5 (768-d, English); bge-small-en-v1.5 (384-d, English, fastest); embeddinggemma-300m (768-d, multilingual (Google EmbeddingGemma)). Any other model name (e.g....$0.001 Base45 ms3 payers100% up
  20. 100squeezeos-api.onrender.com/v1/oddsPrediction-market odds API — return one sourced odds line or no_market for a caller question after canonical x402 settlement; deferred settlement, 4xx validation failures never settle.$0.001 Base105 ms3 payers100% up
  21. 100api.healthtravel-api.workers.dev/api/travel/spaceflight-newsLatest spaceflight news articles from the Spaceflight News API v4: title, news site, publish date, URL, summary and the total article count. Aggregated from news sites; summaries are the site's own text cut by the API.$0.002 Base27 ms3 payers100% up
  22. 100api.healthtravel-api.workers.dev/api/travel/septa-train-viewLive SEPTA regional rail train positions from the public TrainView feed: train number, line, destination, current and next stop, heading, minutes late and track. Covers SEPTA regional rail trains currently reporting; not a schedule.$0.002 Base41 ms3 payers100% up
  23. 100api.healthtravel-api.workers.dev/api/health/blood-center-accreditationAABB-accredited facilities from AABB's public lists: blood banks, transfusion services and blood centers, immunohematology and molecular labs, perioperative and out-of-hospital transfusion, cord blood, HPC and cell therapy facilities, and relationship (DNA) testing labs. Per facility: name, city, state, country, AABB codes, and website and phone for DNA labs. Filter by state, country or name.$0.002 Base27 ms3 payers100% up
  24. 100json-repair-api-9ybv.onrender.com/trust/x402/preflightPublic, account-free preflight for an autonomous x402 payment. Validates the merchant's exact PAYMENT-REQUIRED challenge against the intended request, checks Base USDC payment integrity and public merchant/payTo risk evidence, and returns APPROVED, REVIEW or DENIED with signed proof. It does not grant spending authority: an APPROVED result means the transaction evidence is clear enough to proceed only if separate delegated authority also permits the spend.$0.001 Base191 ms3 payers100% up
  25. 100api.healthtravel-api.workers.dev/api/health/chEMBL-bioactive-moleculesEMBL-EBI ChEMBL molecule search: ChEMBL ID, preferred name, maximum clinical phase, molecule type, molecular weight, canonical SMILES, first approval year and ATC codes. Up to 20 molecules per call, with total match count.$0.002 Base23 ms3 payers100% up
  26. 100api.healthtravel-api.workers.dev/api/health/reactome-biological-pathsReactome curated human biological pathways matching a term (Reactome ContentService, CC BY 4.0): stable ID, pathway name, whether it is a disease pathway and a short summary. Human pathways only. Up to 20 per call.$0.002 Base36 ms3 payers100% up
  27. 100pump.x4o2.com/v1/coins/trendingpump.fun's live trending board (the 'movers' surface of its advanced indexer): mint, name, ticker, chain, market cap, volume, price changes, holder and transaction counts per coin, ordered as the site ranks them. Use to find what is active on pump.fun at this moment.$0.001 Base293 ms3 payers100% up
  28. 100api.sitecheck-api.workers.dev/api/flightsFlight fares for one route and date, one-way or round trip: the cheapest, the fastest and the cheapest nonstop option, then up to 20 itineraries sorted by price with carrier, stops, duration, departure and arrival times (local and UTC), every flight segment and aircraft. Cabin, maximum stops and market (sets the currency) are optional. Fares for a single traveller from Ignav; a fare search, not a booking.$0.05 Base54 ms3 payers100% up
  29. 100api.companyrecords-api.workers.dev/api/b2b/thomasnetUS and Canadian industrial suppliers from Thomasnet for a product or service term (valves, CNC machining...): top 25 suppliers with ID, name, type (manufacturer, distributor...), tier, verified flag, address with coordinates, phone, website, sales and employee bands, year founded, description, capabilities, brands and products, plus the total match count. Optional state filter on those 25.$0.002 Base51 ms3 payers100% up
  30. 100api.sitecheck-api.workers.dev/api/wiki/pageviewsDaily or monthly page views (user agent, all access) for up to 5 articles in one Wikipedia edition over a date range of at most one year, with totals, peak day and the change between the first and second half. mode=top lists the most viewed articles of one day. Data lags by about a day; bots and unknown agents are excluded.$0.002 Base59 ms3 payers100% up
  31. 100api.healthtravel-api.workers.dev/api/health/gwas-catalog-associationsEMBL-EBI GWAS Catalog genome-wide association hits for a gene symbol (REST API v2): reported trait, EFO trait, SNP and locus, p-value, odds ratio or beta, study accession and PubMed ID. Searches by mapped gene only. Up to 10 hits per call.$0.002 Base32 ms3 payers100% up
  32. 100api.youraitools.co/agentgate/v1/check-agentConcordium Agent Registry verdict + full record$0.005 Base162 ms3 payers100% up
  33. 100ontarioprotocol.com/api/x402/find-apiWhich x402 API should my agent call? Live API finder for any task. Required: task. Returns up to 5 paid APIs that answered a fresh unpaid probe with a valid Base USDC 402, ranked by task fit, price and Bazaar-reported repeat buyers, each with live price, network and a ready-to-call request. Provider calls are paid separately. No live match, no charge. $0.005 USDC on Base. No account, no API key. Recommendations, not a safety guarantee. By Ontario Protocol.$0.005 Base200 ms3 payers100% up
  34. 100x402.deepsense.stream/api/v1/market/holdersTop token holders with wallet, balance, percent of supply, labels/tags and first-seen time. Percent of supply is computed for you from total supply, so the result is ready for concentration checks, whale tracking or airdrop analysis. Works for Solana SPL and ERC-20 tokens on Base and Ethereum.$0.003 Base192 ms3 payers100% up
  35. 100api.sitecheck-api.workers.dev/api/web/archiveWayback Machine snapshots of a public URL: the capture closest to a date, the list of captures in a date range (one per day, max 500), first and last capture, and mode=diff, which compares the latest snapshot's text with the live page (added and removed lines, max 200 each). Diff is line-based and does not parse JavaScript-rendered pages.$0.002 Base41 ms3 payers100% up
  36. 100api.chainmarket-api.workers.dev/api/crypto/tether-treasury-burnsUSDT (Ethereum) supply changes from the USDT contract's own events over the last N blocks (1 to 200000, about 4 weeks): Tether issues (Issue), redemptions (Redeem) and destroyed funds of blacklisted addresses (DestroyedBlackFunds), with counts, totals and the latest and largest events. On-chain events only, not Tether's treasury reports.$0.002 Base41 ms3 payers100% up
  37. 100x402.freeq.one/tools/enrich_companyCompany Enrichment: Company firmographics by domain (preferred) or exact name: description, industry, company type, exact and range headcount, headcount growth by timespan, founding year, headquarters, specialties and LinkedIn URL. A settled no-match returns 404 and is not charged. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/enrich_company.$0.04 Base217 ms3 payers100% up
  38. 100api.companyrecords-api.workers.dev/api/b2b/linkedin-company-profilesPublic LinkedIn company page facts: name, description, headquarters address, employee count band, website links and logo, from the schema.org data LinkedIn publishes on the public company page (no login). Posts, followers and people are not included.$0.002 Base42 ms3 payers100% up
  39. 100makememoneynomistakes.ai/api/v1/directory/trustedEvery x402 seller host that proves an ERC-8004 identity on Base and whose owner agent our board grades: verdict LEGIT, SUS or BOUNCED, score, Paid per use result from independent paying wallets, listings, uses, Base USDC cost range and the Bazaar's reported figures, up to 100, LEGIT and most independent payers first. Call it to pick whom to pay or resell; a host missing here is unverified or ungraded, not clean.$0.01 Base211 ms3 payers100% up
  40. 100kushbitx.com/api/token-riskToken-risk report for one Base ERC-20 contract. Checks whether the token can be sold (honeypot simulation), buy/sell/transfer tax, owner privileges (mint, pause, blacklist, balance changes, proxy upgrades), holder concentration and DEX liquidity. Returns ALLOW, WARN, BLOCK or INCOMPLETE with scored findings and per-check coverage. INCOMPLETE means required evidence was unavailable, never zero risk. Read-only: never signs or trades.$0.001 Base102 ms3 payers100% up
  41. 100api.sitecheck-api.workers.dev/api/law/federal-registerSearches Federal Register documents via the official API (public domain). Filter by terms, agency slug, document type (rule, proposed rule, notice, presidential document) and date range. Each result includes title, document number, type, agencies, publication date, effective date, comment end date, abstract, and PDF/HTML URLs. `limit` max 50.$0.003 Base44 ms3 payers100% up
  42. 100api.sitecheck-api.workers.dev/api/pm/resolvedFetches recently resolved prediction markets from Polymarket and Manifold over the last N days (max 30). Includes question, winning outcome, final prices/probabilities, resolution timestamp, and resolution source. Optional keyword filter. Information only, not financial advice.$0.003 Base98 ms3 payers100% up
  43. 100api.chainmarket-api.workers.dev/api/finance/coinmarketcapCoinMarketCap ranked crypto listing: name, symbol, USD price, market cap, 24h volume and 24h change for the top N coins. Read from the JSON that coinmarketcap.com itself loads (undocumented; can change without notice).$0.002 Base46 ms3 payers100% up
  44. 100verifylite.hydratinghealingtouch.workers.dev/verifyURL syntax validator. Takes one absolute HTTP or HTTPS URL and returns its normalized form, or a specific error code: unparseable, unsupported scheme, embedded credentials, IP literal, or local/metadata hostname. Never contacts the destination, so it is fast and side-effect free. Useful for cleaning URLs from user input, scraped pages, or LLM output before fetching them.$0.005 Base56 ms3 payers100% up
  45. 100scraplingdata.xyz/v1/traders/walletTrader profile for any Hyperliquid wallet: leaderboard rank by PnL for day/week/month/all-time (out of ~47,000 accounts), PnL/ROI/volume per window, account value, live open perp positions (coin, side, size, entry, value, unrealized PnL, leverage, liquidation price), and recent-fill stats (win rate of closing trades, realized PnL, fees, most-traded coins, last trade time). From public Hyperliquid chain state. Params: address (0x...).$0.003 Base153 ms3 payers100% up
  46. 100api.youraitools.co/tasignal/v1/riskCrypto risk metrics API (VaR, volatility and position sizing). Risk analytics and position sizing for a crypto asset: historical VaR and CVaR at 95/99% per bar and per day, annualized volatility, max drawdown and current drawdown from the high, Sharpe and Sortino, worst/best bar over up to 1000 closed candles; ATR(14)-based stop (or your stop), risk per unit and, with account_usd and risk_pct, the position size in units and USD notional, implied leverage and 2R/3R levels. Not financial advice.$0.02 Base222 ms3 payers100% up
  47. 100api.chainmarket-api.workers.dev/api/finance/sec-nport-mutual-fund-holdingsRecent SEC NPORT-P filings (monthly mutual fund and ETF portfolio reports) for one fund-company CIK, from EDGAR's public submissions index: filing date, period and accession number. Holdings inside the XML are not parsed.$0.002 Base38 ms3 payers100% up
  48. 100pro-api.coingecko.com/api/v3/x402/onchain/simple/networks/:network/token_price/:addressesQuery onchain DEX token price & market data based on the provided token contract addresses on a network.$0.005 Base299 ms3 payers100% up
  49. 100x402.valunaria.com/api/v1/web/extractVALUNARIA Extract$0.01 Base203 ms3 payers100% up
  50. 100api.maximusmediahouse.com/v1/dedupeNear-duplicate detection across a batch of documents. Exact Jaccard similarity over word-3-shingle sets decides duplication; a 64-bit SimHash is returned per document as a compact content fingerprint. Up to 200 documents per call.$0.01 Base210 ms3 payers100% up
  51. 100agent402.tools/api/drug-ndcLook up the FDA National Drug Code directory (openFDA) by NDC or by brand or generic name: product NDC, labeler, dosage form, routes, active ingredients with strengths, marketing category and application number, pharmacologic class, marketing and listing dates, and the package NDCs with their descriptions. The answer says how many products matched. Live FDA data, no key.$0.004 Base156 ms3 payers100% up
  52. 100agent402.tools/api/drug-labelFDA drug labeling (openFDA SPL) by brand or generic name, or by NDC: boxed warning, indications and usage, dosage and administration, contraindications, and warnings and precautions, with manufacturer, routes, application number, NDCs and the label's effective date. Each section reports its full length and whether it was cut. Newest label first; the answer says how many labels matched. Live FDA data, no key.$0.004 Base143 ms3 payers100% up
  53. 100agent402.tools/api/device-adverse-eventsFDA device adverse events (MAUDE) ($0.004/call via x402 or MPP)$0.004 solana125 ms3 payers100% up
  54. 100us-regulations.use.x402atlas.com/recentUS federal regulation updates feed — Federal Register documents an agency published in the last N days, newest first, with type, abstract, effective date and comment deadline. Use to monitor the EPA, SEC, FDA or any agency for new rules, proposed rules and notices.$0.01 Base247 ms3 payers100% up
  55. 100uuid.use.x402atlas.com/generateRandom UUID generator — returns time-ordered UUIDv7 (RFC 9562, sortable, database-key friendly) or fully random UUIDv4, 1 to 100 per call, as lowercase canonical strings. Use for unique IDs, primary keys, request and correlation IDs, idempotency keys.$0.005 Base255 ms3 payers100% up
  56. 100upgrade-brief.shopttyass-85f.workers.dev/pypi/breaking-changesPyPI breaking changes between two versions of a Python package, before a pip package upgrade: the documented breaking changes per version from the project's CHANGELOG, HISTORY or CHANGES file and GitHub release notes (alpha/beta/rc folded into the major), plus Requires-Python and required dependency changes, yanked versions, migration guide links and a verdict. PEP 440 versions ('1.10.13', '2.0') or a major ('1'); a source URL for every item.$0.005 Base82 ms3 payers100% up
  57. 100us-regulations.use.x402atlas.com/agenciesUS federal agency directory — the Federal Register's agency slugs, names, short names and parent-child links, searchable by substring. Use to find the slug an agency filter needs, e.g. environmental-protection-agency for the EPA.$0.005 Base293 ms3 payers100% up
  58. 100upgrade-brief.shopttyass-85f.workers.dev/changelognpm changelog between two versions: the full release notes of every version in the range (newest first, up to 100), from the package CHANGELOG and GitHub releases, with publish dates, bump type (major, minor, patch), npm deprecations, extracted breaking changes and package.json manifest changes. Covers a whole package upgrade or dependency upgrade in one call instead of reading dozens of release pages.$0.01 Base42 ms3 payers100% up
  59. 100sweetai.tiamatcrypto.com/api/v1/agent-reputationCheck an AI agent's reputation before you trust it: is this agent's reputation earned or bought? Sybil forensics over the ERC-8004 reputation registry — reviewer concentration, ghost reviewers, burst detection flags bought feedback. Optional limit=N. Same handler and price as /api/v1/trust-forensics. No account, no API key$0.01 Base222 ms3 payers100% up
  60. 100micro-saas-agent.onrender.com/api/govcontracts[Market data: crypto] Federal contract awards: recent 14-day USAspending actions to AI, drone, nuclear, robotics, space, quantum and defense-tech companies (ticker, amount, agency, date, award link). Optional ?ticker=PLTR&sector=ai&q=NASA. Defense/DoD awards appear on USAspending about 90 days late; war.gov daily announcements are currently unavailable from our host (see free /api/govcontracts/status). 30-min cache. $0.01 USDC. Signal only.$0.01 Base277 ms3 payers100% up
  61. 100gankdat.com/x402/data/uk-care-locationsRegulated care locations in England (CQC). One call returns one page of matching records as JSON (25 by default, per_page up to 100) with the total count and the last refresh time; the query parameters filter the records.$0.005 Base68 ms3 payers100% up
  62. 100fundamental-scores-x402.onrender.com/v1/distress-listDaily-refreshed ranking of US exchange-listed (NYSE/Nasdaq/CBOE) operating companies with the worst combined distress: Altman Z, Piotroski F and Beneish M verdict risk points plus red-flag severity from recent filings (going concern, auditor change, restatement, delisting notice, late filing). Each row: ticker, distress score, verdict, fraud-risk, top red flags, F/Z/M. Query limit=1-100 (default 25). For short ideas, credit watchlists, risk monitoring. Errors are never charged (bad tickers rejec$0.005 Base260 ms3 payers100% up
  63. 100derivs.duoleads.com/v1/basisFutures basis and term structure of one coin: dated futures on Bybit, Deribit, Kraken, Gate and OKX with days to expiry, basis vs index and annualised basis (contango or backwardation, the carry), the perp premium (mark vs index/oracle) on Hyperliquid, dYdX, Bitfinex and the others, and predicted funding. Crypto futures basis for BTC, ETH and more. Data only. Bad input is free; under 2 venues not charged.$0.003 Base276 ms3 payers100% up
  64. 100derivs.duoleads.com/v1/funding-historyFunding rate history of one coin on one exchange (Bybit, Hyperliquid, dYdX, Gate, Kraken, Deribit or OKX), up to 30 days: every past funding print with interval, 8h rate and APR, plus avg/min/max/% positive and the window covered. Historical perpetual swap funding for backtests and carry studies on BTC, ETH, SOL and more. Data only. Bad input is free; a venue that fails is not charged.$0.003 Base255 ms3 payers100% up
  65. 100cryptofeed402.site/historyArchive of past cryptofeed402 twice-daily LLM-written market briefs for a date range (from/to as YYYY-MM-DD, up to 366 days): sentiment, funding, open interest, prices, news and macro calendar per edition. Use it for backtesting, building historical context or reviewing how funding and sentiment evolved. JSON. Free sample at /samples/history. $0.005 USDC per day in range, capped at $0.5 per call, on Base.$0.005 Base257 ms3 payers100% up
  66. 100ca-tax-api-mainnet.lxtap.workers.dev/arbitrum/contractIdentify what lives at a Arbitrum One address$0.005 Base291 ms3 payers100% up
  67. 100clinical-trials.use.x402atlas.com/recentClinical trial updates feed — ClinicalTrials.gov studies for a condition that were posted or updated in the last N days, newest first, with status, phases, interventions, sponsor, dates and enrollment. Use to monitor a disease area, a drug or a sponsor for new trials, status changes and posted results.$0.01 Base294 ms3 payers100% up
  68. 100ca-tax-api-mainnet.lxtap.workers.dev/address/screenIs this address sanctioned? Screens a crypto address against the US Treasury OFAC SDN list's published digital currency addresses (ETH, USDC, USDT, XBT, SOL, TRX and others): the listed entity, programs and listing date on a match, or not found as of the list date. Adds whether it is a wallet (EOA) or contract on Base, Ethereum, Arbitrum, Optimism or Polygon, or a wallet or program-derived address on Solana. Not legal advice.$0.005 Base251 ms3 payers100% up
  69. 100biomedical-grants.use.x402atlas.com/recentNIH new awards feed — projects added to RePORTER in the last N days, newest first, filterable by institute, activity code and SBIR/STTR mechanism, with award amount, organisation and investigators. Use to monitor what NCI, NIAID or any institute just funded, or to catch new small-business awards in a field.$0.01 Base260 ms3 payers100% up
  70. 100api.youraitools.co/cryptoprice/v1/moversCrypto market movers API for AI agents. Top 24h gainers, losers and volume leaders across ~200 coins (markets with at least $1M 24h volume by default), with USD price, change, volume and open interest. Search intents: top crypto gainers, crypto losers today, biggest movers, crypto market overview, trending coins.$0.002 Base200 ms3 payers100% up
  71. 100api.maximusmediahouse.com/v1/slugifyURL-safe slug from arbitrary text. NFKD-decomposes unicode (é -> e), lowercases, replaces every non-[a-z0-9] run with a separator, strips leading/trailing separators, truncates on separator boundaries (never mid-word).$0.002 Base107 ms3 payers100% up
  72. 100api.polls.karbach.digital/v1/attentionAttention from Wikipedia page views per day: German parties and the leading candidates of the next elections (Bundestag, Saarland, Schleswig-Holstein, North Rhine-Westphalia, Spain, France). Not a forecast. Use when asked how much public attention a German party or a leading candidate in Germany, Spain or France gets, or whether interest is rising. Not a measure of support. Source-attributed. Refused (503, not charged) if data is older than 50 hours.$0.01 Base178 ms3 payers100% up
  73. 100api.maximusmediahouse.com/v1/hashContent-addressable hashing for caching and dedup. Three algorithms: sha256 (via node:crypto / Web Crypto), xxhash64 and murmur3 (inline pure-JS, deterministic across runs). Returns hex digest + algorithm + byte count.$0.002 Base288 ms3 payers100% up
  74. 100pump.x4o2.com/v1/coins/feedThe ranked coin feed pump.fun's home page loads: each coin's mint, name, image, market cap, protocol (pump bonding curve or AMM), creator, creation time and activity figures. A broader, slower-moving list than the trending board. Use for market-wide scans.$0.001 Base180 ms3 payers100% up
  75. 100api.webintel-api.workers.dev/api/search/wikimedia-commons-imageWikimedia Commons image search (MediaWiki API, public, no key): file title, direct image URL, size, MIME type, license, author and description for free-licensed files. Returns file metadata only, not image bytes.$0.002 Base96 ms3 payers100% up
  76. 100pumpdata.fun/replayBacktest a list of pump.fun picks against the chain's own history: up to 500 picks (mint, time, size in SOL) filled at the PumpSwap pool 3 s after the mark (graduates only; curve picks are counted in skipped_not_covered), pump.fun fees by venue and tier, 145,000 lamports a side, dead coins in the sum ($2 a run; 202 with a job id, then GET /replay/{id}). Use to check a caller's record or your own rule before trusting it.$2.00 Solana255 ms3 payers100% up
  77. 100api.youraitools.co/fx/v1/ratesExchange rates API for AI agents. Every ECB reference rate for a base currency (or just the quotes you list) on the latest or a past date. Search intents: exchange rates api, fx rates table, currency rates today, usd exchange rates, ecb reference rates.$0.001 Base145 ms3 payers100% up
  78. 100api.youraitools.co/cryptoprice/v1/priceCrypto price API for AI agents. Current USD price of BTC, ETH, SOL and ~200 more coins (up to 20 per call) with 24h change, 24h volume, open interest and funding rate, from Hyperliquid public market data. Search intents: crypto price api, bitcoin price, eth price, token price usd, coin quote, crypto market data, price snapshot.$0.001 Base43 ms3 payers100% up
  79. 100gogeta2-u35175.vm.elestio.app/agents/v1/agent/a2a-cardFetch and validate a peer agent's A2A Agent Card (v1.0 / v0.3): fields, skills, interfaces, auth, signature, reachability. Score 0-100 + issues.$0.01 Base166 ms3 payers100% up
  80. 100api.youraitools.co/toolpick/v1/pickAPI finder for AI agents (live-checked). Pick the paid x402 API to call: top 10 ranked resources for your need (relevance, 30-day payers and calls, recency, price; filters), a live check of the top 5 (one unpaid request each, 3 s timeout: 402 with x402 terms, live price and networks, matches the listing?), the best verified pick, the cheapest verified alternative and category price stats. Fail-closed: a failed check is never called verified; none verified means best_pick null, low confidence.$0.01 Base197 ms3 payers100% up
  81. 100scraplingdata.xyz/v1/traders/topTop traders on Hyperliquid (largest on-chain perp DEX), ranked from public on-chain account data across ~47,000 accounts: wallet address, display name, account value, PnL USD, ROI %, volume for the chosen window plus day/week/month/all-time stats and explorer link. Params: venue=hyperliquid, window=day|week|month|allTime, sort=pnl|roi|volume|worst, limit (default 25, max 200), min_account (USD, default 10000), min_volume.$0.005 Base110 ms3 payers100% up
  82. 100ca-tax-api-mainnet.lxtap.workers.dev/polygon/balancesNative POL balance of a Polygon PoS wallet plus the balances of up to 20 ERC-20 tokens you list, formatted with each token's symbol and decimals, read live from Polygon PoS$0.005 Base42 ms3 payers100% up
  83. 100scraplingdata.xyz/v1/token/verdictShould I trade this token? One-word verdict (go / caution / avoid), 0-100 risk score, risk flags and the facts behind them: DEX liquidity USD, top-10 holder concentration %, LP locked %, buy/sell tax, honeypot and can-sell checks, mintable, proxy, hidden owner, blacklist, pausable, open source, CEX listings. Chains: base (default), ethereum, bsc, arbitrum, polygon, optimism, avalanche, solana (pass the mint as address). Live GoPlus scan (about 1-3 s); no charge if the scan fails$0.005 Base133 ms3 payers100% up
  84. 100scraplingdata.xyz/v1/whales/tokenWhale flow for one coin: large Hyperliquid perp orders (default >= $50k) for that coin over the window, net whale buy/sell USD and bias, plus live mark price, 24h change, hourly funding, open interest and 24h volume. Params coin (or address), chain=hyperliquid, min_usd (>=25000), window (15m|1h|4h|24h|7d, default 24h). Unknown coin returns 404 with no charge$0.005 Base160 ms3 payers100% up
  85. 100nordata.hihat.workers.dev/mvaEU VAT number validation against the European Commission's official VIES service, a live query of the issuing member state's national VAT register. Give a VAT id with country prefix (27 EU states plus XI) and get whether it is valid for intra-EU trade, plus registered name and address where the state discloses them. Use it for B2B invoicing and reverse-charge checks, customer onboarding/KYB and supplier data cleaning. Norway is not in VIES: use /firma.$0.003 Base66 ms3 payers100% up
  86. 100crypto-market-data.zafermemon87.workers.dev/v1/whale-ordersThe biggest market orders of the last hour on Binance futures, Binance spot and Hyperliquid, with what each Hyperliquid order did.$0.003 Base63 ms3 payers100% up
  87. 100nordata.hihat.workers.dev/leiGlobal Legal Entity Identifier (LEI) lookup from the official GLEIF database (Global LEI Foundation, CC0 open data). Search by LEI code, 9-digit Norwegian organisation number or legal name and get the LEI, registration status (ISSUED/LAPSED), legal and previous names, jurisdiction, national registry id, legal form, address, BIC and renewal date. Use it for KYC/KYB checks, mapping a Norwegian org.nr to its LEI, or verifying a firm before onboarding.$0.003 Base63 ms3 payers100% up
  88. 100api.youraitools.co/toolpick/v1/liteAPI search engine for AI agents (find a paid x402 API). Find the paid x402 API for a task: top 5 resources from the merged public x402 discovery indexes, ranked by relevance to your need, index-reported 30-day payers and calls, recency and price. Each result: service, resource URL, method, description, USDC price, networks, 30-day calls and payers, repeat_buyers, last called time. Filters: max_price, network, min_payers. No live check (use /v1/pick). No matches: 404, never charged.$0.003 Base152 ms3 payers100% up
  89. 100nordata.hihat.workers.dev/reiseDoor-to-door public transport journey planner for Norway from Entur, the national travel data hub. Give two stop, station, place or street address names and get the next journeys with departure and arrival time, duration, number of transfers and every leg (mode, line, from, to, times; walking legs in metres). Trains, buses, coaches, trams, metro and ferries, flights optional. Use it for trip planning, travel-time estimates and itinerary agents.$0.003 Base60 ms3 payers100% up
  90. 100crypto-market-data.zafermemon87.workers.dev/v1/sentimentCrypto Fear and Greed index with the previous value, trending coins, market breadth, mood and volatility regime.$0.003 Base47 ms3 payers100% up
  91. 100api.youraitools.co/perpcheck/v1/liteHyperliquid order checker API (pre-trade). Pre-trade check of a Hyperliquid perp order before you send it: REJECT_LIKELY / CAUTION / OK, each exchange-rule issue with a fix value (size decimals, price tick, $10 minimum, max leverage by margin tier, isolated-only, OI cap, delisted, far-from-mark limit), warnings and the coin rules. Read-only; never places or signs orders. Fail-closed: a failed source is listed, never OK. Not financial advice; the exchange decides whether an order is accepted.$0.003 Base171 ms3 payers100% up
  92. 100api.agentweather.io/v1/models/reportReadings for one AI model in the models.dev catalog (GET /v1/models/report?id={model id}): input/output prices per 1M tokens with 24h and 7d change, standard job cost, context and output limits, modalities, knowledge cutoff, release date, provider listings, the vendor's status-page indicator and in…$0.01 Base168 ms3 payers100% up
  93. 100api.chainmarket-api.workers.dev/api/crypto/basescan-contract-eventsRecent event logs of a contract on Base (chain 8453) from public RPC: block, time order, transaction hash, log index, event name (signature database), topics and data, with ERC-20/721 Transfer and Approval decoded to from/to/value. Look back up to 5,000 blocks (~2.8 h); optional event-signature filter. Internal transactions are not included.$0.002 Base61 ms3 payers100% up
  94. 100br-intelligence.brverify-api.workers.dev/v1/boletoBrazil boleto decoder and validator: digitable line (47/48) or barcode (44). Bank, amount, due date (Febraban factor reset of 2025 handled) and check digits; utility/tax (arrecadacao) slips included.$0.005 Base46 ms3 payers100% up
  95. 100br-intelligence.brverify-api.workers.dev/v1/pixBrazil PIX decoder and validator: PIX copia-e-cola (BR Code) payload, CRC16, key and key type, merchant name and city, amount, txid, static or dynamic.$0.005 Base55 ms3 payers100% up
  96. 100br-intelligence.brverify-api.workers.dev/v1/ratesBrazil economic indicators from the Central Bank of Brazil (SGS): Selic target, CDI (annual and daily), IPCA inflation (monthly and 12-month), USD/BRL. Each value with its reference date.$0.005 Base37 ms3 payers100% up
  97. 100api.sitecheck-api.workers.dev/api/vinDecodes up to 20 vehicle identification numbers with NHTSA's vPIC database (US public domain): make, model, model year, trim, body class, vehicle type, engine (cylinders, displacement, fuel), drive type, plant country and city, manufacturer, and the decoder's own error code and message. The check digit is verified for North American VINs. A VIN that is not 17 characters without I, O or Q is a 400.$0.002 Base48 ms3 payers100% up
  98. 100api.sitecheck-api.workers.dev/api/user-agentParses a User-Agent string: browser and version, rendering engine, operating system and version, device type, vendor and model, CPU, and whether it is a known crawler (Googlebot, Bingbot, GPTBot, ClaudeBot, PerplexityBot, AhrefsBot and a few more) with its name. Optional Client Hints values (platform, mobile, model) are reported as given. Parsed with ua-parser-js 1.x (MIT). Pure code, no outside request.$0.002 Base129 ms3 payers100% up
  99. 100api.sitecheck-api.workers.dev/api/uptimeChecks up to five public URLs now from this Worker: up or down, HTTP status, the final URL after up to five redirects, response time in milliseconds, whether TLS was used, content type and length, and the Cloudflare data centre (colo) the check ran from. A down site is a valid 200 answer with up false and the error, not a failure. The check is one GET per hop, so it measures the first response, not the full page.$0.002 Base155 ms3 payers100% up
  100. 100api.sitecheck-api.workers.dev/api/unitsConvert a value between units of length, area, volume (US customary and metric, cooking measures), mass, speed, pressure, energy, power, data size (SI and binary), time and temperature. Factors are exact to the definitions in NIST SP 811 (international inch and pound, US gallon, calorie IT, Btu IT, mechanical horsepower). An unknown unit is a 400 that lists every supported unit. Pure code, no outside source.$0.002 Base138 ms3 payers100% up