x402watch

37,707 paid endpoints are listed. 23,020 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 2026-09-30 05:46 UTC · 37,707 probed

23,020 answering 4029,132 down4,532 rejecting1,023 no paywall2,818 price drift
  1. 81hivemindos-paid-agent-gateway.hivemindos.workers.dev/api/x402/video-generator/generationsGenerate one downloadable video from a text prompt using a curated HivemindOS video tier. The exact x402 price is quoted before payment.$0.94 Basedown1 payers93% up
  2. 80crypto.apitoll.cloud/v1/crypto/dexDecentralized exchange (DEX) trading volume ranked by protocol: 24-hour and 7-day volume in USD with 1d/7d change, plus the chains each DEX runs on. Pass ?chain=base to scope to one chain. See where on-chain trading is happening across Uniswap, Curve, Raydium, PancakeSwap and more. Sourced from DefiLlama.$0.001 Basedown1 payers83% up
  3. 80whaletape.xyz/pro/unlock60 minutes of the browser dashboard for humans: live whale positioning, signals and an AI brief that refreshes on its own$0.99 Basedown1 payers80% up
  4. 80api.brazilayer.com/v1/commodities/pacoteAll five Brazil commodity signals in ONE call, 47% cheaper than one by one: crop-weather stress per belt (coffee, soy, sugar, corn, orange, cocoa), fire hotspots by biome, monthly exports, reservoir energy and the daily English briefing. Same JSON as the single endpoints, keyed by name; unavailable components are listed in `indisponiveis` (503 and no charge if fewer than half respond). Free sample, no payment: https://api.brazilayer.com/v1/commodities/amostra$0.06 Basedown1 payers83% up
  5. 79fiatdock.com/s/svc_dc2994f4-7959-40d6-805a-deea66db5d41Pay-per-call: x402 Web Extract — paid page/token fetch for agents$0.01 Basedown1 payers73% up
  6. 79api.wines.bet/v1/wine/investmentBlue Chip & fine wine investment analysis oracle. Returns market index, financial returns (7d, 1m, 1y), liquidity level, volatility tier, Sharpe ratio, bid signals, price spread, and drinking maturity window for wine portfolio management and RWA tokenization.$0.015 Basedown1 payers90% up
  7. 78api.brazilayer.com/v1/bcb/instituicao/:cnpjVerify whether a Brazilian company is a financial institution authorized by the Central Bank of Brazil (banks, credit unions, consortia, regulated societies) — plus its officially VERIFIED internet domains, refreshed daily from the official registry. Instant check for crypto exchanges, fintechs and compliance agents onboarding Brazilian counterparties or detecting fake-bank phishing. Accepts full CNPJ or 8-digit root. Free sample, no payment: https://api.brazilayer.com/v1/bcb/amostra$0.005 Basedown1 payers80% up
  8. 78content.lonestaroracle.xyz/repurposeContent repurposing — turns any URL into a LinkedIn post, 3 tweets, newsletter blurb, and SEO summary$0.15 Basedown1 payers77% up
  9. 78bundle.lonestaroracle.xyz/scanToken launch bundle and sniper detection on Base — flags coordinated bundle buys and snipers$0.10 Basedown1 payers77% up
  10. 78x402-agent-store.rileycraig14.workers.dev/crypto/prices$0.001 Basedown–89% up
  11. 78entropy.rip/api/entropy/whisperGenerate cryptographic random bytes$0.005 Basedown–73% up
  12. 77agent.atinamos.co.uk/agent/render-checkIndependent website QA and pre-handover verification for AI agents. Submit one public website URL. Atinamos loads the real site in desktop and mobile Chromium, checks HTTP and browser failures, failed requests, console errors and warnings, captures screenshots, and returns machine-readable evidence. Poll the returned status_url for results.$0.25 Basedown1 payers70% up
  13. 77tools.miniframe.com.br/extractExtract structured data from a web page$0.02 Basedown1 payers70% up
  14. 77verpackung.getregisters.com/api/v1/feeds/de-packaging-compliance/exportVerpackungspflichten-Monitor: one page of recorded obligation history, up to 500 versions. Each page is a separate purchase; historical coverage may be incomplete. Licence: https://getregisters.com/agent-licence.html$0.025 Basedown1 payers87% up
  15. 77medicaidwaivers.getregisters.com/api/v1/feeds/cms-waivers/exportMedicaid Waiver Register: one page of recorded obligation history, up to 500 versions. Each page is a separate purchase; historical coverage may be incomplete. Licence: https://getregisters.com/agent-licence.html$0.025 Basedown1 payers87% up
  16. 77agents.bytemine.ai/functions/v1/api-gateway/company/intel/sitemapDiscover site structure$1.00 Basedown–89% up
  17. 76api.proxies.sx/v1/x402/proxy$0.375 Basedown–86% up
  18. 75finance-api.kdlcfa.workers.dev/eth-priceEthereum (ETH-USD) spot price, delayed, via Yahoo Finance$0.01 Basedown3 payers67% up
  19. 75api-staging.eckari.com/v1/companies/us/:id/filings/latestGive a stock ticker (AAPL) or CIK and get the most recent EDGAR filing of each requested form — by default the latest 10-K, 10-Q and 8-K — with filing and report dates and a direct sec.gov link to each primary document. Request other forms (4, SCHEDULE 13G) and you get the newest one filed about the company. Requested forms with no recent filing are named in forms_not_found, never dropped. Use when: What is Apple's latest 8-K, and where is the document?$0.003 Base Sepoliadown1 payers67% up
  20. 75weather.lonestaroracle.xyz/forecastGFS+ECMWF ensemble temperature probability for NWS weather prediction markets$0.02 Basedown1 payers67% up
  21. 75finance-api.kdlcfa.workers.dev/btc-tx-count-recentRecent Bitcoin transaction count over the latest reporting interval, via Blockchain.info stats API$0.01 Basedown1 payers67% up
  22. 75finance-api.kdlcfa.workers.dev/dax-indexDAX (Germany) spot index quote, delayed, via Yahoo Finance$0.05 Basedown1 payers67% up
  23. 75entropy.rip/api/storage/relic/createCreate long-term storage (30-day TTL)$0.05 Basedown–77% up
  24. 74api.vaults.fyi/v2/detailed-vaultsRetrieves a comprehensive list of vaults with detailed performance metrics including APY, TVL, rewards, risk scores, and protocol information based on specified filters.$0.302 Basedown1 payers70% up
  25. 74bp3ocaveiu74yyrd35hyt4b6j4.srv.us/v1/mermaidRender a Mermaid diagram (flowchart, sequence, class, state, ER, gantt, pie, mindmap, timeline, ...) to PNG, SVG or PDF$0.01 Basedown–67% up
  26. 74bp3ocaveiu74yyrd35hyt4b6j4.srv.us/v1/graphvizRender a Graphviz DOT graph to PNG, SVG or PDF (engines: dot, neato, fdp, sfdp, circo, twopi, osage, patchwork)$0.01 Basedown–67% up
  27. 74bp3ocaveiu74yyrd35hyt4b6j4.srv.us/v1/searchSearch ~18,000 paid x402 APIs on Base (merged CDP Bazaar + PayAI Bazaar + x402scan + 402index) in plain language$0.002 Basedown–67% up
  28. 73flint.network/api/x402/verifyVerify an AI agent's authority and integrity before a transaction; returns a four-state verdict, a signed verification record, and after payment a linked signed settlement receipt$0.01 Basedown1 payers63% up
  29. 73centry.cybercentry.co.uk/api/services/wallet_verificationScreen a wallet address for sanctions and risk: OFAC SDN sanctions screening, risk scoring and suspicious-activity detection across 31 EVM chains. Check a counterparty before you transact with it$1.00 Basedown1 payers63% up
  30. 73x402.payperbyte.io/feeds/merchant-screenPre-settlement merchant screen: signed ALLOW/WARN/BLOCK on (domain, payTo, price) before you settle. Queries are logged (domain, payTo, price); screening is not covert — the merchant sees the probe. Full disclosure: https://x402.payperbyte.io/feeds$0.10 Basedown1 payers63% up
  31. 73x402-accelerometer-feed.fly.dev/ai-progress/what-changed/:from/:toUse this when the question is what moved in AI progress between two dates: the acceleration between two readings of 129 series (benchmarks, compute, AGI odds, model pricing, AI stocks and crypto, energy, space, robotics, research output). Per series: from/to value and date, absolute and % change, and whether a new observation landed. Dates are YYYY-MM-DD ids from the free menu at /.$0.01 Basedown1 payers63% up
  32. 73x402-agent-store.rileycraig14.workers.dev/defi/yields$0.003 Basedown–89% up
  33. 71x402.agentutility.ai/search-siteSearch a specific public website or domain through Decodo Google results by sending a query with a site: filter. The response includes ranked titles, URLs, snippets, and domains. If primary search is quota-limited, a marked GDELT fallback can return recent news-indexed pages from that domain with recency capped at 168 hours. Use it as a site search API, domain search tool, website search endpoint, or scoped web search for agents.$0.006 Basedown2 payers60% up
  34. 70x402.agentutility.ai/hacker-news-searchSearch Hacker News for startup news, YC news, Show HN launches, and founder discussion through the Algolia HN index. Send a query, then filter stories, comments, or polls by author, minimum points, and ISO-8601 date range; sort by relevance or newest first. Returns titles, authors, points, comment counts, timestamps, URLs, and matching text. Use it as a startup news search API, YC news search, Show HN tracker, or developer news feed.$0.001 Basedown3 payers67% up
  35. 70dealpulse.theaslangroupllc.com/api/deals/storeCoupon codes / promo codes / discount codes / store cashback for a store or restaurant. Returns real-time working coupon codes, current promotions, and cashback rates for any named retailer or restaurant worldwide. For shopping and deal-hunting agents.$0.05 Basedown1 payers63% up
  36. 70ari001.tailb4ac3a.ts.net/v1/ventures/ethereum_contract_abi_service/eth_blocknumberReturns the current block number of the Ethereum mainnet as a hex string.$0.002 Basedown1 payers64% up
  37. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/unitConvertScientificScientific unit conversion for pressure, energy, and molarity using exact conversion factors.$0.01 Basedown1 payers50% up
  38. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/generateDateDataTrue-random-date generator API. Generates a bounded random date via one of: anytime, past, future, between, betweens, recent, soon, birthdate. between/betweens require "from" and "to" date strings. Accepts optional locale (default en_US). Date args must parse to a valid date with year 1000-9999.$0.01 Basedown1 payers50% up
  39. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/generateChecksumFormatChecksummed-identifier-format generator API. Generates a structurally valid isbn, upc, vin, or imei, each computed with its real check-digit algorithm. vin and imei take no arguments. Accepts optional locale (default en_US).$0.01 Basedown1 payers50% up
  40. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/electricCarSavingsCalculatorElectric car savings calculator. Compares annual electricity cost against annual gas cost for a comparable gas vehicle, accounting for free-charging usage, and computes break-even years, cost per full charge, and gas-price-equivalent effective MPG.$0.01 Basedown1 payers50% up
  41. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/diffTextLine-based diff between two strings using the Myers diff algorithm (via the diff/jsdiff library), returning a list of equal/add/remove operations.$0.01 Basedown1 payers50% up
  42. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/cronParseComputes the next N run times for a standard 5-field cron expression, avoiding the mental cron-schedule simulation an LLM often gets subtly wrong.$0.01 Basedown1 payers50% up
  43. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/colorConvertConverts a color between hex, rgb, and hsl representations using exact arithmetic.$0.01 Basedown1 payers50% up
  44. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/urlDecodeURL decoder API. Decodes percent-encoded URL text back to plain text.$0.01 Basedown1 payers50% up
  45. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/teslaSavingsCalculatorTesla savings calculator. Compares annual electricity cost for a Tesla against annual gas cost for a comparable gas vehicle, accounting for free-charging usage, and computes break-even years, cost per full charge, and gas-price-equivalent effective MPG.$0.01 Basedown1 payers50% up
  46. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/semverCompareCompares two semantic version strings and reports which is greater, lesser, or equal, using the standard semver comparison rules.$0.01 Basedown1 payers50% up
  47. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/savingsRateCalculatorSavings rate calculator. Divides the gap between monthly take-home income and spending by income to produce your personal savings rate as a percentage.$0.01 Basedown1 payers50% up
  48. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/mortgageComparisonCalculator15-year vs 30-year mortgage comparison calculator. Computes monthly payment and total interest for both loan terms on the same purchase price and down payment, and reports the payment and lifetime-interest tradeoff between them.$0.01 Basedown1 payers50% up
  49. 70ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/base64EncodeBase64 encoder API. Encodes UTF-8 text to base64 instantly and correctly — skip burning agent tokens hand-computing base64, which LLMs frequently get wrong on padding and edge cases.$0.01 Basedown1 payers50% up
  50. 70farelight.xyz/api/v1/index/dailyDaily series$0.005 Basedown–60% up
  51. 70farelight.xyz/api/v1/wallets/%7Baddress%7DWallet profile$0.01 Basedown–60% up
  52. 70farelight.xyz/api/v1/paymentsPayment feed$0.02 Basedown–60% up
  53. 70farelight.xyz/api/v1/wallets/%7Baddress%7D/paymentsPayments of a wallet$0.01 Basedown–60% up
  54. 70farelight.xyz/api/v1/tx/%7Bhash%7DTransaction$0.005 Basedown–60% up
  55. 69cascade.lonestaroracle.xyz/riskDeFi liquidation cascade risk — Morpho Blue health factors and cascade exposure$0.10 Basedown1 payers67% up
  56. 69bp3ocaveiu74yyrd35hyt4b6j4.srv.us/v1/markdown-pdfConvert Markdown (GFM tables, code, lists) to a clean, print-ready PDF$0.01 Basedown–67% up
  57. 69bp3ocaveiu74yyrd35hyt4b6j4.srv.us/v1/readRead any public URL as clean, LLM-ready Markdown$0.003 Basedown–67% up
  58. 69bp3ocaveiu74yyrd35hyt4b6j4.srv.us/v1/screenshotScreenshot any public web page in a real headless Chrome (JavaScript executed, waits for network idle)$0.005 Basedown–67% up
  59. 69pollen-uv-index-forecast.hergertsynthora.com/serviceSYNTHORA pollen_uv_index_forecast$0.001 Basedown–67% up
  60. 68centry.cybercentry.co.uk/api/services/base_token_verificationCheck a Base token contract before buying: detects honeypots, armed freeze-and-seize, a live pause, fake B20s and ticker-impersonation copycats, and separately discloses issuer controls (admin centralisation, supply cap, transfer policy, rebase) so a legitimate token is not mistaken for a scam$1.00 Basedown1 payers63% up
  61. 68x402-accelerometer-feed.fly.dev/tokenized-equities/st0x/registryUse this when you need to resolve a stock ticker to its ST0x on-chain token, or check whether a contract is a genuine ST0x tokenized share: the complete issuer registry for all 54-56 names on each of four chains (Base, Ethereum, HyperEVM, Robinhood Chain) — wrapped (wtNVDA, ERC-4626) and unwrapped (tNVDA, ERC-20) addresses, the ERC-1155 receipt vault, ISIN, TradingView symbol, listed flag. Versioned from the issuer's own registry; refreshed hourly.$0.001 Basedown1 payers63% up
  62. 68biosfera.46-62-215-147.sslip.io/o/ens-resolve$0.002 Basedown–72% up
  63. 68biosfera.46-62-215-147.sslip.io/o/public-holidays$0.001 Basedown–72% up
  64. 68biosfera.46-62-215-147.sslip.io/o/erc721-tokens-of-owner$0.002 Basedown–72% up
  65. 67x402.agentutility.ai/people-enrichEnriches a person record from an email, name, domain, or company using public data only.$0.01 Basedown–56% up
  66. 66api.brazilayer.com/v1/licitacoes/fornecedor/:cnpjEvery public contract won by a Brazilian company, from the official National Public Procurement Portal (PNCP): contracting government body, object, value, signature date and validity period, plus summary stats (total contracts, total value, distinct bodies). The missing piece of due diligence: how much a company sells to the government. Company records only. Free sample, no payment: https://api.brazilayer.com/v1/licitacoes/amostra$0.01 Basedown1 payers60% up
  67. 66x402-accelerometer-feed.fly.dev/tokenized-equities/st0x/pulseUse this when you want to know what is actually trading in tokenized stocks on Base right now: the last 24 hours on ST0x's own DEX (Raindex) per token — USDC volume, trade count, last on-chain price and time — plus each token's issued vault supply and ERC-4626 wrapper rate, sorted by volume, with platform totals. Read straight from the public subgraphs and RPC; refreshed every 5 minutes.$0.01 Basedown1 payers43% up
  68. 66biosfera.46-62-215-147.sslip.io/o/erc20-supply$0.0015 Basedown–76% up
  69. 66biosfera.46-62-215-147.sslip.io/o/is-contract$0.001 Basedown–76% up
  70. 65api.brazilayer.com/v1/fundos/consulta/:cnpjVerify a Brazilian investment fund by CNPJ against the official CVM registry: is it registered, is it operating, who is the manager (gestor) and administrator, its class and ANBIMA classification — plus the latest daily NAV, net assets and shareholder count. The instant check against fake-fund and Ponzi schemes marketed as investment funds. Free sample, no payment: https://api.brazilayer.com/v1/fundos/amostra$0.005 Basedown1 payers67% up
  71. 65ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/physicalConstantsLookup of standard physical constants (speed of light, gravitational constant, Planck constant, elementary charge, Avogadro number, Boltzmann constant, gas constant, electron mass) with exact published CODATA values.$0.01 Basedown1 payers50% up
  72. 65ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/keepingUpWithInflationCalculatorKeeping up with inflation calculator. Computes the pre-tax raise needed under two scenarios — keeping the same dollar amount saved, or maintaining the same savings rate — after inflation raises your spending and a marginal tax rate reduces the raise itself.$0.01 Basedown1 payers50% up
  73. 65ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/generateNumberDataTrue-random-number generator API. Generates a bounded random number via one of: int, float, binary, octal, hex, bigInt (returned as a string), romanNumeral. Accepts optional locale (default en_US). Numeric args (min, max, multipleOf) are capped to +/-1e15; fractionDigits is capped to 0-20.$0.01 Basedown1 payers50% up
  74. 65farelight.xyz/api/v1/facilitatorsFacilitator share$0.005 Basedown–60% up
  75. 64x402-accelerometer-feed.fly.dev/tokenized-equities/st0x/premium/:tickerUse this when the question is whether an ST0x tokenized stock on Base trades above or below the real share: send a ticker (NVDA, wtAAPL, FGI) and get the premium/discount in basis points from the deepest USDC pool (live) and the last Raindex fill vs the exchange quote, corrected for the ERC-4626 wrapper rate, with market session, age of every leg, pool depth, any cross-issuer pool (wtNVDA vs Coinbase NVDAc), and a one-sentence read. Unknown ticker -> 404, no charge.$0.02 Basedown1 payers40% up
  76. 63api.helpmyagent.com/v1/company/fr/searchSearches French companies by name, SIREN, SIRET or optional location criteria and returns structured matching company records.$0.002 Basedown4 payers47% up
  77. 63api.brazilayer.com/v1/commodities/briefingToday's Brazil Commodity Briefing, in English, synthesized daily by AI from official Brazilian public data: crop weather and frost risk, fire/drought, export flows, hydro levels, FX and market headlines — condensed into what changed and what to watch for coffee (KC), sugar (SB), soybeans (ZS), corn (ZC), OJ, cotton and cattle, with per-commodity bullish/bearish flags. Free sample, no payment: https://api.brazilayer.com/v1/commodities/amostra$0.10 Basedown1 payers63% up
  78. 63ari001.tailb4ac3a.ts.net/v1/ventures/ethereum_contract_abi_service/erc20_balance_allowance_bundleReturns both the ERC-20 balanceOf and allowance for a given token, owner, and spender in one paid call. Returns: each named part service's own result, in one paid call, keyed by the part's name -- exactly what each part returns when bought alone; the call succeeds only when every part answers. It takes the union of the parts' query parameters. Query: address, owner, spender, token.$0.006 Basedown1 payers56% up
  79. 63biosfera.46-62-215-147.sslip.io/o/erc20-metadata$0.0015 Basedown–72% up
  80. 63biosfera.46-62-215-147.sslip.io/o/erc20-allowance$0.001 Basedown–72% up
  81. 63biosfera.46-62-215-147.sslip.io/o/erc721-owner$0.0015 Basedown–72% up
  82. 63biosfera.46-62-215-147.sslip.io/o/native-balance$0.001 Basedown–72% up
  83. 63biosfera.46-62-215-147.sslip.io/o/tx-receipt$0.002 Basedown–72% up
  84. 63biosfera.46-62-215-147.sslip.io/o/tx-by-hash$0.002 Basedown–72% up
  85. 63biosfera.46-62-215-147.sslip.io/o/proxy-implementation$0.0015 Basedown–72% up
  86. 62x402-accelerometer-feed.fly.dev/ai-progress/as-of/:idUse this when you need AI progress as it stood on a past date: the reading of the same 129 series (benchmarks, compute, AGI prediction-market odds, model pricing, AI stocks, energy, space, robotics, research output) taken on YYYY-MM-DD. Dated ids are listed free at /. Same per-series shape as /ai-progress/latest, so you can diff dates yourself; /ai-progress/what-changed does the diff for you. Unknown id -> 404.$0.005 Basedown1 payers53% up
  87. 61x402-accelerometer-feed.fly.dev/tokenized-equities/same-stock/:tickerUse this when you need the same stock from every issuer on Base in one call: send a ticker (NVDA, AAPL, TSLA) and get, per issuer — ST0x (wtNVDA) and Coinbase tokenized stocks (NVDAc, B20) — the genuine contract verified against the issuer's own registry, live price, premium/discount vs the real share in bps, pool depth and 24h volume, the ST0x-vs-Coinbase spread, any direct cross-issuer pool, and every impostor token using the same symbol. xStocks flagged as not on Base.$0.05 Basedown1 payers43% up
  88. 61staging.402utils.com/v1/vat-checkValidate an EU VAT number against the official VIES registry before invoicing, onboarding or a reverse charge. Per-country syntax is checked locally first, so invalid formats never touch the network. Valid numbers return the registered company name and address when disclosed, plus an optional consultation number (requesterVat). Never a false 'invalid': if VIES is down you get a 503 and are not charged. ?attest=1 → Ed25519-signed.$0.002 Base Sepoliadown1 payers52% up
  89. 60402utils.com/v1/domain-checkDomain availability and expiry intelligence via RDAP, the WHOIS successor. Queries the authoritative registry for any RDAP-enabled TLD: free domains return registered:false, taken ones return registrar, creation and expiry dates, nameservers and EPP status codes. TLDs without RDAP coverage return supported:false. Built for agents that buy, monitor or vet domains.$0.002 Basedown5 payers50% up
  90. 60staging.402utils.com/v1/fx-ratesDaily euro FX reference rates from the European Central Bank. ?base (default EUR), ?quote for a single rate, ?date=YYYY-MM-DD for history (last 90 ECB business days; older dates 404). Non-EUR bases are cross-rates derived via EUR (quote-per-EUR ÷ base-per-EUR). Weekend/holiday dates resolve to the last published ECB day — the date field says which. Published ~16:00 CET on ECB business days; informational rates, not for transaction pricing.$0.001 Base Sepoliadown1 payers50% up
  91. 59api.brazilayer.com/v1/cnpj/situacao/:cnpjDoes this CNPJ exist in the official Receita Federal registry, and is it active? Returns existence, registration status (situacao_cadastral: Ativa=active, Suspensa=suspended, Baixada=closed) with date, headquarters/branch flag and state. Cheapest paid check in the catalog: digit arithmetic alone cannot tell a well-formed number from a real, active company. Free sample, no payment: https://api.brazilayer.com/v1/cnpj/amostra$0.001 Basedown5 payers57% up
  92. 56api.hyper-growth.xyz/v1/oil-supply-shock-watch$0.075 Basedown–60% up
  93. 56token-intel-x402.meisburply.deno.net/api/token-intelFused safety + market read on any Solana token$0.01 Basedown–44% up
  94. 55channel3-x402.onrender.com/v1/lookup$0.005 Basedown–58% up
  95. 52staging.402utils.com/v1/iban-checkValidate an IBAN structurally before you pay or store it: ISO 7064 mod-97 check digits plus the official per-country length and BBAN layout (~90 countries), returning the bank/branch/account breakdown for FR, DE, ES, IT, BE and NL. Structural validation only — no BIC directory lookup (SWIFT's BIC registry is proprietary) and no proof the account exists. Local, instant. ?attest=1 → Ed25519-signed.$0.001 Base Sepoliadown1 payers45% up
  96. 50social.gedx402.com/v1/sociavault/instagram/reelsSociaVault API proxy — instagram-reels. Query/body matches https://docs.sociavault.com/api-reference/openapi.json. GET/POST per route; x402 per call. $0.014 USDC per request.$0.014 Basedown2 payers33% up
  97. 50api.magentlab.com/api/calc/finneganModified Finnegan NAS from Maguire 2013 Table 1 (operational modified FNAS; not a 31-item website variant; not Maguire's 7-item short form). Exclusive cry, sleep, Moro, tremor, fever, respiratory, and stool bands plus true/false CNS, vasomotor, and GI items. Sum 0-46. at_or_above_8 iff score >= 8. magent does not examine the infant. Not Eat Sleep Console. Not a morphine order, diagnosis, or medical device.$0.005 Basedown1 payers17% up
  98. 50api.magentlab.com/api/calc/bush_francisBush 1996 23-item catatonia rating scale from caller-assigned integers. Items 1-16 and 22-23 are 0-3; mitgehen, gegenhalten, ambitendency, grasp_reflex, and perseveration are 0 or 3 only. Severity is the sum of items 1-23 (max 69). The 14-item screen is positive iff at least two of items 1-14 score above 0. magent does not perform the standardized examination. Not a diagnosis, not DSM catatonia criteria, not a medical device.$0.005 Basedown1 payers17% up
  99. 50api.magentlab.com/api/calc/berg_balanceBerg 1992 Berg Balance Scale (BBS): fourteen caller-assigned integers 0-4 (sitting to standing through standing on one foot). Sum 0-56. magent does not observe. Berg 1992 printed no 0-20 wheelchair / 21-40 walking-with-assistance / 41-56 independent website bands. Not Timed Up and Go, not a diagnosis, and not a medical device.$0.005 Basedown1 payers17% up
  100. 50api.magentlab.com/api/calc/easiHanifin 2001 EASI from four regions. Each region: area 0-6 and erythema, edema/papulation, excoriation, and lichenification 0-3. Region score = (sum of signs) × area × adult weight (head/neck 0.1, upper extremities 0.2, trunk 0.3, lower extremities 0.4). Total max 72. Adult weights only. magent does not examine the skin. No IGA or later severity bands. Not a diagnosis.$0.005 Basedown1 payers17% up