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. 100api.sitecheck-api.workers.dev/api/text/transliterateTransliterate text to Latin ASCII, or make a URL slug from it. Covers Cyrillic, Greek, Turkish, German, Nordic, Polish, Vietnamese and accented Latin letters. Characters with no table entry (Arabic, Hebrew, CJK ...) are kept and listed in unconverted, not guessed. Up to 2,000 characters. Pure code.$0.002 Base185 ms3 payers100% up
  2. 100api.sitecheck-api.workers.dev/api/text/readabilityReadability of a text in pure code: Flesch Reading Ease, Flesch-Kincaid grade, Gunning Fog, SMOG, Coleman-Liau and ARI, with counts of characters, words, sentences, syllables and complex words, and reading and speaking time. English formulas; other languages get counts only. Syllables are counted by a vowel-group heuristic, so scores are estimates. Up to 100 KB.$0.002 Base246 ms3 payers100% up
  3. 100api.sitecheck-api.workers.dev/api/text/keywordsKeywords and keyphrases from a text by RAKE (Rose et al., 2010) in pure code: phrases between stopwords and punctuation, scored by word degree and frequency, with counts. Stopword lists for en, de, fr, es, it, pt, nl and tr. Body { text, language, limit }: up to 100 KB, limit 1 to 50.$0.002 Base130 ms3 payers100% up
  4. 100api.sitecheck-api.workers.dev/api/text/diffDifferences between two texts: mode lines, words or chars; the added, removed and unchanged parts with counts, a similarity ratio (2 x unchanged / both texts' units), and a unified diff for lines. Body { a, b, mode }: lines and words up to 50 KB each, chars up to 20 KB each (capped for the Worker's CPU budget). Pure code using the diff package (BSD-3-Clause).$0.002 Base280 ms3 payers100% up
  5. 100api.sitecheck-api.workers.dev/api/sslTLS certificate expiry for up to 10 hostnames: the issuer, validity dates, days left, all DNS names and a status (ok, expiring within 14 days, expired, none found). Read from Certificate Transparency logs (CertSpotter, crt.sh as fallback), so it is the newest valid certificate issued for each name, not the one the server presents; the answer also says whether https answers and its HSTS header. Public hostnames only.$0.002 Base109 ms3 payers100% up
  6. 100api.sitecheck-api.workers.dev/api/robotsChecks whether a URL's path may be crawled under robots.txt (RFC 9309): the verdict for a user agent (default: *, Googlebot, Bingbot, GPTBot, ClaudeBot, PerplexityBot, Google-Extended and CCBot), the rule that decided it and its line, crawl-delay, sitemaps and the matching group's lines. Longest rule wins, allow wins a tie, * and $ work. No robots.txt means everything is allowed; a server error is a 503, not charged.$0.002 Base112 ms3 payers100% up
  7. 100api.sitecheck-api.workers.dev/api/jwt/decodeDecodes a JWT (up to 16 KB): header, payload, registered claims as ISO dates, expired and not-yet-valid flags, algorithm and signature length. With jwksUrl (public https) the signature is checked with WebCrypto for RS, PS and ES algorithms against the matching key. 'none' is never accepted; HMAC needs the secret. Tokens are secrets: this tool does not store or log them.$0.002 Base137 ms3 payers100% up
  8. 100api.sitecheck-api.workers.dev/api/finance/loanLoan and investment calculator in exact cents, no outside source. mode=annuity: monthly payment, total interest and the full amortisation schedule (up to 600 months). mode=compound: future value of an initial sum plus monthly contributions. mode=npv or irr: discount or internal rate of return of a list of cashflows (up to 200, the first at time 0). Rates are percentages from 0 to 100 a year (per period for npv and irr); terms up to 50 years.$0.002 Base175 ms3 payers100% up
  9. 100api.sitecheck-api.workers.dev/api/encodeEncode or decode text as base64, base64url, hex, URL (percent) encoding, HTML entities, punycode (domain names) or quoted-printable. Body { input, scheme, direction }, up to 1 MB. Invalid input to decode is a 400 that names the position of the first bad character. Unknown HTML entities are reported, not guessed. Pure code, no outside request.$0.002 Base143 ms3 payers100% up
  10. 100api.sitecheck-api.workers.dev/api/date/calcDate and time calculations in pure code. op=diff: calendar years, months and days between two dates, and the total days. op=add or subtract: move a date by years, months, weeks, days, hours or minutes (month ends are clamped). op=info: weekday, ISO week, day of year, quarter, and age from birthDate. op=tz: a local date-time in one IANA time zone shown in another. Impossible dates are a 400 with the reason.$0.002 Base89 ms3 payers100% up
  11. 100api.sitecheck-api.workers.dev/api/crypto/convertConvert an amount between a crypto and a fiat currency, or between two crypto assets, at the current spot price: the rate, the converted amount, the pair path used (direct, or through USD) and the time of the rate. Spot prices from Coinbase, Kraken as the fallback. A spot rate, not an executable quote: no fees or slippage. Fiat to fiat is refused; use the FX tool for that. Information only, not financial advice.$0.002 Base101 ms3 payers100% up
  12. 100api.sitecheck-api.workers.dev/api/company/tickerMaps a US-listed stock ticker, SEC CIK number or company name fragment to the other two, with the exchange: an exact ticker or CIK, or up to 10 names matching the words you give (the names that start with it first). From the SEC's company ticker file (public domain), cached a day and trimmed before caching. Covers companies with an SEC ticker only; a name with no match is a 404, not charged.$0.002 Base182 ms3 payers100% up
  13. 100api.sitecheck-api.workers.dev/api/business-daysWorking days for a country. mode=between counts the working days after `from` up to and including `to` (up to 5 years) and lists the public holidays skipped; mode=add gives the date that is N working days after `date` (up to 3,650). Weekends are Saturday and Sunday, Friday and Saturday in Israel, and Friday only in Iran and Afghanistan. Nationwide public holidays from Nager.Date; a country with no holiday data is a 404, not charged.$0.002 Base101 ms3 payers100% up
  14. 100api.sitecheck-api.workers.dev/api/uuidIdentifiers and secrets from the Web Crypto random source: UUID v4 and v7, ULID, nanoid (size and alphabet), random passwords (length and character classes) and passphrases (words from the EFF large wordlist, CC BY 3.0 US), up to 100 per call. mode=parse validates a UUID or ULID and reports its version, variant and the time embedded in v1, v6, v7 and ULID. Nothing is stored.$0.002 Base68 ms3 payers100% up
  15. 100chain.tollkit.dev/chain/newsCrypto news for AI agents: give a coin or topic, get the latest news articles from the past hour, day or week with publisher, date, snippet and link, plus an AI read of the coverage: mood, summary and themes.$0.004 Base155 ms3 payers100% up
  16. 100api.youraitools.co/counterpartycheck/v1/liteCrypto address risk check API (pre-payment counterparty screening). Pre-payment counterparty check for agents: before paying or approving an EVM (Base, Ethereum, Polygon, Arbitrum) or Solana address, get ok / caution / block with reasons. Screens OFAC SDN and ScamSniffer scam lists, x402 Bazaar payee directory and known labels, and reads the address on-chain (wallet, contract, token contract, Safe, EIP-7702 delegation, activity, USDC balance).$0.005 Base154 ms3 payers100% up
  17. 100api.webintel-api.workers.dev/api/search/shanghai-arwu-rankingsShanghaiRanking ARWU 2026 world university ranking (public table on shanghairanking.com, no key): world position, institution, national rank, total score and the six indicator scores (Alumni, Award, HiCi, N&S, PUB, PCP). The public page shows the top 30 only.$0.002 Base50 ms3 payers100% up
  18. 100api.jobsproperty-api.workers.dev/api/realestate/suumoSecond-hand condominiums for sale in Japan from SUUMO: building name, headline, price (yen), address, nearest line/station and walk time, floor area (m²), layout (e.g. 2LDK), balcony, build year/month, selling agent and listing URL, 30 per page, for a prefecture (and optionally a city/ward code). Text is in Japanese as published.$0.002 Base97 ms3 payers100% up
  19. 100api.webintel-api.workers.dev/api/search/shanghai-gras-rankingsShanghaiRanking Global Ranking of Academic Subjects (GRAS): for a subject (55, e.g. Mathematics, Computer Science, Clinical Medicine, Economics) and year, ranked universities with rank or band, total score, the five indicator scores, country and institution URL. Filter by country or university name. Without a subject, lists the subjects and their codes.$0.002 Base102 ms3 payers100% up
  20. 100agent-toolbox.zafermemon87.workers.dev/v1/dnsDNS records of a domain (A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV, PTR) over DNS-over-HTTPS (1.1.1.1), with DNSSEC validation status.$0.002 Base57 ms3 payers100% up
  21. 100tariffmonkee.com/paid/tw-weather-checkTaiwan weather forecast and air quality for one county or city: the Central Weather Administration 36-hour forecast (conditions, rain chance, min/max temperature, comfort) and real-time AQI readings from Ministry of Environment monitoring stations. Accepts Chinese or English city names. Government Open Data License v1.0 sources.$0.005 Base207 ms3 payers100% up
  22. 100gogeta2-u35175.vm.elestio.app/agents/v1/escrow/verifyVerify an attestation token issued by evaluate_deliverable: recovers the EIP-712 signer, checks it is our evaluator, returns verdict, score, jobId and the bytes32 reason.$0.001 Base139 ms3 payers100% up
  23. 100api.annalist.dev/v1/web/censusOur weekly census of 65,000 top sites: how many sites and stores publish UCP or ACP agent-checkout profiles, agent and MCP cards and llms.txt, which AI crawlers stores block, store platforms, and changes in the last 30 days. With signal=, the stores that have it (for example signal=ucp), most-linked first. Signed.$0.01 Base262 ms3 payers100% up
  24. 100api.webintel-api.workers.dev/api/search/pubmed-article-metadataPubMed article metadata by PMID (NCBI E-utilities esummary, public, no key): title, journal, publication date, authors and DOI for up to 20 ids. Summary fields only, no abstracts.$0.002 Base40 ms3 payers100% up
  25. 100agent.chiemgaufilms.com/api/v1/news-searchGoogle News Search (0.02 USDC per call)$0.02 Base165 ms3 payers100% up
  26. 100api.sitecheck-api.workers.dev/api/dex/poolsFetches decentralized exchange (DEX) liquidity pools for a token or pair across chains via DexScreener (with GeckoTerminal fallback). Returns chain, DEX name, pair address, base/quote tokens, USD price, liquidity, 24h volume, 24h transaction count, price change percentages, and pool creation age. Limit up to 30 pools. Information only, not financial advice.$0.002 Base145 ms3 payers100% up
  27. 100api.sitecheck-api.workers.dev/api/domain/typosquatGenerates lookalike domains of a brand (omission, transposition, repetition, bit-flip, homoglyph, vowel swap, hyphenation, TLD swap; technique list after dnstwist), checks up to 30 of them in DNS (A records), and reads MX records for up to 8 that resolve. Resolving in DNS is not proof of registration or abuse.$0.002 Base261 ms3 payers100% up
  28. 100api.sitecheck-api.workers.dev/api/crypto/newsLatest crypto headlines from the RSS feeds of CoinDesk, Cointelegraph, Decrypt, The Block and Bitcoin Magazine, newest first: title, link, publisher, publish time, the coins named in the text, and at most 200 characters of the feed's own summary. Filter by words in the text (q) or by coin. Feeds are cached 5 minutes; a feed that fails is listed in unavailable. Headlines and links only, not the articles.$0.002 Base254 ms3 payers100% up
  29. 100api.sitecheck-api.workers.dev/api/defi/chainsTotal value locked by chain from DefiLlama, largest first, with each chain's token, chain id and stablecoin market cap. With chain, that chain's own row and its TVL change over 1, 7 and 30 days from DefiLlama's daily history. Data: DefiLlama. Information only, not financial advice.$0.002 Base92 ms3 payers100% up
  30. 100api.sitecheck-api.workers.dev/api/booksBook lookup by ISBN (checked before the call) or by title and/or author: title, subtitle, authors, publishers, first publish year, median page count, ISBN-10 and ISBN-13 of the matching edition, languages, subjects, cover image URL, and the Open Library work and Wikidata ids. Data from Open Library (CC0). A title with no match is a 404, not charged. Up to 20 results.$0.002 Base170 ms3 payers100% up
  31. 100x402-agent-tools.nerolabs.workers.dev/rules/us-sales-tax-nexusChecks which US states a remote seller must register in to collect sales tax (economic nexus). Send sales and order counts per state for the last 12 months or a calendar year, and whether they include marketplace sales (Amazon, Etsy). Returns states over the threshold (must register), close to it (80 percent or more) and under it, with each state's threshold, measurement period, what counts and the revenue department source. Information, not tax advice.$0.003 Base72 ms3 payers100% up
  32. 100sift.srv1996466.hstgr.cloud/v1/yt/translate-subtitlesTranslate an SRT or VTT subtitle file, keeping every timestamp$0.01 Base117 ms3 payers100% up
  33. 100sift.srv1996466.hstgr.cloud/v1/yt/metadataYouTube titles, description, tags and hashtags for a video topic or transcript. Eight title options (with hook type and why each works), a description whose first lines work as the preview, 12 to 20 tags kept under YouTube's length limit, hashtags and chapter lines. Give a topic and optionally the transcript, audience and language.$0.01 Base121 ms3 payers100% up
  34. 100api.sitecheck-api.workers.dev/api/package/searchSearches package names and descriptions on npm, crates.io, Packagist, RubyGems and NuGet, returning name, version, description, downloads where the registry gives them, licence, repository and last publish date. PyPI has no search API: it is checked by exact name only. Registries that fail are listed in unavailable. Limit per registry max 10.$0.002 Base63 ms3 payers100% up
  35. 100agent402.tools/api/page-changeTell whether a public web page changed since you last looked, with nothing stored on this side. One fetch (15 s, 2 MB) takes the text a reader sees (hidden elements, scripts and styles dropped; a CSS selector narrows it to one region), collapses whitespace, strips any ignore entries (a literal substring, or /pattern/ for a regex, for timestamps and counters), and answers a sha256 fingerprint of that text with the origin's ETag and Last-Modified.$0.004 Base146 ms3 payers100% up
  36. 100api.socialfetch.dev/v1/reddit/posts/commentsList comments on a Reddit post by URL.$0.014 Base111 ms3 payers100% up
  37. 100api.nansen.ai/api/v1/transaction-with-token-transfer-lookupGet Transaction with Token Transfer Lookup Data$0.01 Base254 ms3 payers100% up
  38. 100library.proofivy.com/cryptoslateCryptoslate content lookup. Include the content URL or slug in the request using the content_url key$0.01 Base68 ms3 payers100% up
  39. 100api.financialdatasets.ai/financialsAll three financial statements for a company by ticker or CIK in one call: income statements, balance sheets and cash flow statements, standardized from SEC filings. Period annual, quarterly or ttm; filter by report_period or filing_date. Use when an agent needs the full picture of a company's finances in one request. Non-Professional use; Professional use needs a plan at financialdatasets.ai.$0.02 Base261 ms3 payers100% up
  40. 100x402.swaphunt.dev/v1/fomo/how-late-am-iFOMO guard on 4h candles of Hyperliquid perpetuals (USDC-margined): how far price has already run from the recent swing low, in % and ATR multiples, and where that move ranks against past 20-candle moves, with an early/middle/late verdict. Use so an agent does not buy the top. Coverage: top 50 Hyperliquid perpetuals by 30-day volume; see /v1/tools/price/supported (other coins get 422 not_covered, no charge)$0.003 Base205 ms3 payers100% up
  41. 100flat-rate-llm.kikoribera03.workers.dev/v1/ai/transcribeUse when an agent is handed audio and needs text it can work with: Whisper large v3 turbo - pass an https URL (mp3, wav, flac, m4a, ogg, up to 10 MB) or base64 audio in a POST. Returns the text, the detected language with its probability, the duration, and timed segments; add words=true for word-level timestamps. Around 100 languages. You are only charged if the transcript is delivered. No API key, no account.$0.02 Base56 ms3 payers100% up
  42. 100apexrunner.ai/signals/regimeMarket regime detection for a single coin (BTC, ETH, SOL, AVAX). Classifies volatility state as TRENDING, RANGING, CRISIS, or RECOVERY with confidence score. Query param: ?coin=BTC$0.007 Base71 ms3 payers100% up
  43. 100twitr.sh/api/tools/radarTrending topics and breaking stories across tech, dev, science, business, culture, politics, and entertainment — aggregated from multiple public sources with regional and time-window filters. Flat sub-cent price per call; the cheap first stop for what is happening right now.$0.0024 Base166 ms3 payers100% up
  44. 100walcert.globalscoreagent.com/v1/certificates/originsBefore hiring or paying an ERC-8004 agent, grade the controlling wallet's funding origins (CEX, bridge, mixer, organic) A-F. POST wallet_address; signed certificate + Celo on-chain anchor. $0.05 USDC.$0.05 Base99 ms3 payers100% up
  45. 100api.financialdatasets.ai/newsRecent news articles for a US-listed ticker, or broad market news when no ticker is given: title, source, date and URL, newest first; up to 10 per request. Use when an agent needs the latest headlines on a company or the market. Non-Professional use; Professional use needs a plan at financialdatasets.ai.$0.02 Base175 ms3 payers100% up
  46. 100x240.jvnclk88.workers.dev/screenshotScreenshot of any URL taken in a real browser, returned as a base64 PNG$0.02 Base34 ms3 payers100% up
  47. 100api.financialdatasets.ai/kpi/guidanceForward guidance from a US-listed company's earnings releases, structured: metric, period, the low and high of the range or the point estimate, the change direction versus prior guidance and a link to the source text. Period quarterly or annual; filter by metric_name or report_period. Use when an agent needs what management guided to, not what was reported. Non-Professional use; Professional use needs a plan at financialdatasets.ai.$0.16 Base254 ms3 payers100% up
  48. 100api.financialdatasets.ai/iposSEC IPO filings (S-1, S-1/A, F-1, F-1/A and final prospectuses 424B4, 424B1), newest first, each classified as ipo, shell_company, spac, resale or other, with cover-page details: proposed ticker, exchange and the expected price or price range; IPO-grade filings embed the extracted financial statements. Filter by ticker, CIK, classification or filing_date. Use when an agent tracks upcoming or recent listings. Non-Professional use; Professional use needs a plan at financialdatasets.ai.$0.16 Base180 ms3 payers100% up
  49. 100data.spencermcw.com/v1/drug/nadac/searchWhich NDCs match this drug name, and what do pharmacies pay for them? NADAC search by name (e.g. “atorvastatin 40”) with NDC counts and current per-unit cost ranges, from CMS’s weekly NADAC file. Updated weekly. $0.01 per call (x402, USDC on Base); 3 free calls a day.$0.01 Base115 ms3 payers100% up
  50. 100signals.edge.report/v1/token-riskToken honeypot / security risk check before buy or approve. Input ERC20 contract + chain. Returns verdict avoid|caution|ok, is_honeypot, sell/buy tax, blacklist, owner powers. Use for honeypot detection, scam token screening, rug check, token security on Base Ethereum BSC Arbitrum Optimism Polygon.$0.001 Base68 ms3 payers100% up
  51. 100nojunk-chain.mick8511.workers.dev/balanceBlockchain Data balance: Wallet address -> native balance, USDC balance and transaction count on 7 EVM chains (one or all in parallel), Solana (SOL + USDC) or Bitcoin.$0.002 Base111 ms3 payers100% up
  52. 100agent.connskill.com/v1/traffic-estimateEstimated organic and paid Google traffic for up to 10 domains in one call$0.05 Base162 ms3 payers100% up
  53. 100automaton-tx-explainer.vercel.app/v1/ethereum/approvalsUse when: which token approvals on this Ethereum wallet should I revoke? Check a Ethereum wallet's ERC-20 approvals: allowances for 8 major tokens (USDC, USDT, WETH, DAI...) to common spenders (Permit2, Uniswap Universal Router v4, Uniswap Universal Router, Uniswap SwapRouter02...); flags unlimited approvals.$0.005 Base161 ms3 payers100% up
  54. 100automaton-tx-explainer.vercel.app/v1/ethereum/addressUse when: what is this Ethereum address (wallet, contract, proxy, token)? Inspect any Ethereum address: EOA vs contract vs EIP-7702 delegated, ETH balance, nonce, proxy implementation (EIP-1967/1167/zos), and ERC-20 name/symbol/decimals/supply.$0.005 Base227 ms3 payers100% up
  55. 100automaton-tx-explainer.vercel.app/v1/base/contract-riskUse when: is this Base contract risky (owner, proxy, mint, pause, blacklist)? Heuristic risk flags for a Base contract from free public data: Sourcify verification, upgradeable proxy + admin, owner type, mint/pause/blacklist/fee selectors, bytecode size. Not an audit or financial advice.$0.01 Base199 ms3 payers100% up
  56. 100blockrun.ai/api/v1/pm/polymarket/cohorts/statsCompare performance across trading style cohorts$0.0085 Base96 ms3 payers100% up
  57. 100agentdata-api.sander-van-aard.workers.dev/web/crawlCrawl one site in one paid call: start URL + max_pages (2-20); we follow same-host links breadth-first, returning each page as clean markdown (same extraction as /web/contents). Priced at $0.002 per requested page, quoted as max_pages up front — finding fewer pages is still a complete delivery. Failed pages are skipped and listed in skipped[]; the call still settles. Only an unreadable start page is a 400, no charge. USDC on Base, no account, no API key.$0.006 Base206 ms3 payers100% up
  58. 100x402.freeq.one/market/bazaar/tools/markdownx402-gateway tool: markdown (market: bazaar)$0.001 Base247 ms3 payers100% up
  59. 100x402-tools-production-2755.up.railway.app/tools/token-priceUse to price a crypto portfolio or watchlist in one call. Market data for up to 50 symbols or 250 CoinGecko ids: price, 1h/24h/7d/30d change, 24h high/low, volume, market cap, rank, FDV, supply, and distance from all-time high/low; optional 7-day sparkline. One flat price per call; not charged if nothing is found.$0.002 Base152 ms3 payers100% up
  60. 100x402-tools-production-2755.up.railway.app/tools/domainUse to vet a domain or URL before trusting it, or to check if a name is available. Registry RDAP data (the WHOIS successor) for up to 20 domains per call: registrar, created/expiry dates, age in days, status and transfer lock, nameservers, DNSSEC. Subdomains resolve to their registered domain. One flat price per call.$0.002 Base62 ms3 payers100% up
  61. 100horizonpulse.dev/api/sec/filingsLatest SEC EDGAR filings for one company: form, filed date, accession number, primary document URL, 8-K items. GET ticker, optional form, optional limit 1-20. Ticker list and submissions JSON only. Base/Polygon USDC. Data from SEC EDGAR; not affiliated with or endorsed by the SEC. Not financial, investment, tax, legal or health advice. Quotes about tokens, securities or other financial products are not a recommendation to buy, sell or hold anything. Bad input or an unknown ticker: Not charged.$0.02 Base214 ms3 payers100% up
  62. 100api.tickersfeed.net/analyze/marketAI daily market briefing — one structured JSON summary of stocks, crypto, DeFi, and macro indicators for the day, with outlook. Use for: morning market brief, daily digest generation, newsletter input, agent situational awareness before trading. $0.05 USDC per call.$0.05 Base104 ms3 payers100% up
  63. 100agent402.tools/api/loremLorem ipsum ($0.001/call via x402 or MPP)$0.001 solana99 ms3 payers100% up
  64. 100gateway.spraay.app/api/v1/notify/emailSend email notification for payment confirmations, alerts, receipts.$0.01 Base264 ms3 payers100% up
  65. 100api.myceliasignal.com/oracle/defi/yield/compareUSDC rate comparison across all DeFi lending protocols — Ed25519 signed attestation$0.05 Base73 ms3 payers100% up
  66. 100bot-bazaar.fly.dev/v1/x402/wallet-profileProfile a Base wallet before paying or trusting it: first funder and first-seen time (wallet age), outgoing tx count, contract or EOA, an OFAC SDN address screen, and whether it is a Bot Bazaar seller payout wallet. No balances.$0.01 Base269 ms3 payers100% up
  67. 100api.loyalspark.online/x402-gateway/update-program-configOnchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. On the paid retry send the payment together with header x-api-key: lsk_... or Authorization: Bearer lsk_.... A payment without a live key is not charged. Read key, no browser: POST https://api.loyalspark.online/x402-gateway/register-agent. HTTP 402 is $0.01 USDC on Base. Pay it and do not send an API key. You receive lsk_ once, scope read only: list your programs, rewards, balances, and analytics. That key cannot mint, deploy a program, create rewards, or trade. A new wallet gets a 45-day Pro trial (5 agents, 10,000 calls/month), then Free (1 agent, 200 calls/month, 1,000 tokens minted/month, 1.25% mint fee) unless that wallet pays. The $0.01 is the call price, not a subscription. No free seat returns 403 before any charge. Write scopes (mint, create_program, manage_rewards, trade) use the same plan: dashboard https://loyalspark.online/merchant → AI Agents, or free SIWE — POST https://api.loyalspark.online/siwe-nonce, sign Chain ID 8453 with the exact phrase 'Register Loyal Spark merchant agent', then POST {message, signature, name, scopes} to https://api.loyalspark.online/agent-register-siwe. Look first with no key: GET https://api.loyalspark.online/x402-gateway/public-programs ($0.001, active programs, not your own list). Guide: https://loyalspark.online/.well-known/skills/00-getting-started.md The call is scoped to the wallet behind that key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.$0.005 Base239 ms3 payers100% up
  68. 100api.loyalspark.online/x402-gateway/program-statusOnchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. On the paid retry send the payment together with header x-api-key: lsk_... or Authorization: Bearer lsk_.... A payment without a live key is not charged. Read key, no browser: POST https://api.loyalspark.online/x402-gateway/register-agent. HTTP 402 is $0.01 USDC on Base. Pay it and do not send an API key. You receive lsk_ once, scope read only: list your programs, rewards, balances, and analytics. That key cannot mint, deploy a program, create rewards, or trade. A new wallet gets a 45-day Pro trial (5 agents, 10,000 calls/month), then Free (1 agent, 200 calls/month, 1,000 tokens minted/month, 1.25% mint fee) unless that wallet pays. The $0.01 is the call price, not a subscription. No free seat returns 403 before any charge. Write scopes (mint, create_program, manage_rewards, trade) use the same plan: dashboard https://loyalspark.online/merchant → AI Agents, or free SIWE — POST https://api.loyalspark.online/siwe-nonce, sign Chain ID 8453 with the exact phrase 'Register Loyal Spark merchant agent', then POST {message, signature, name, scopes} to https://api.loyalspark.online/agent-register-siwe. Look first with no key: GET https://api.loyalspark.online/x402-gateway/public-programs ($0.001, active programs, not your own list). Guide: https://loyalspark.online/.well-known/skills/00-getting-started.md The call is scoped to the wallet behind that key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.$0.005 Base253 ms3 payers100% up
  69. 100bot-bazaar.fly.dev/v1/x402/directory-datasetDownloadable cleaned JSON + CSV dataset of verified Base USDC x402 endpoints and MCP servers (category, service_name, url, method, price_usdc, network, asset, pay_to, has_bazaar_schema, mcp_endpoint, last_verified). Excludes operator/house financial figures.$0.01 Base91 ms3 payers100% up
  70. 100bot-bazaar.fly.dev/v1/x402/domain-checkCheck a domain's agent and x402 discovery readiness: probes /.well-known/x402, /llms.txt, and /mcp over HTTPS and reports status codes, latency, discovered x402 resource count, whether /llms.txt is present, and whether /mcp is detected.$0.01 Base238 ms3 payers100% up
  71. 100bot-bazaar.fly.dev/v1/x402/endpoint-checkEndpoint Check$0.01 Base234 ms3 payers100% up
  72. 100signal-api.shicoars.workers.dev/p/trend-enaSeñal diaria ENA/USDT con SMA50, exposición con control de volatilidad, volatilidad 30d y cierre.$0.005 Base44 ms3 payers100% up
  73. 100win.oneshotagent.com/v1/tools/find/record-solicitationsFederal contract opportunities (SAM.gov) by NAICS code — Sources Sought and Presolicitation notices with the contracting officer's published contact. Flat price per search.$0.04 Base87 ms3 payers100% up
  74. 100api.locus.report/api/locus-tax-liensReturns itemized tax-delinquency, tax-lien, and foreclosure rows near an address from official county, treasurer, and sheriff sources, for agents reading cited public records. Use this when you need itemized public lien records and citations. Use locus_tax_distress instead when you only need a nearby count and breakdown, without individual lien records.$0.01 Base232 ms3 payers100% up
  75. 100agentx.sale/x402/site-healthDNS/TLS/HTTP health snapshot for a domain$0.01 Base171 ms3 payers100% up
  76. 100mcp-x402.onrender.com/gate/squeezeos/api/quick/headline/AAPLStock news headline API. Get the latest available market headline for a ticker symbol from a live data provider.$0.001 Base110 ms3 payers100% up
  77. 100mcp-x402.onrender.com/gate/squeezeos/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 Base287 ms3 payers100% up
  78. 100api.myceliasignal.com/oracle/price/sol/usdReal-time Solana price in USD, aggregated from multiple exchanges — Ed25519 signed attestation$0.01 Base126 ms3 payers100% up
  79. 100api.myceliasignal.com/oracle/price/eur/cadEUR/CAD forex exchange rate — euro to Canadian dollar — Ed25519 signed attestation$0.01 Base222 ms3 payers100% up
  80. 100api.myceliasignal.com/oracle/basis/sol/usdSolana spot-futures basis and annualized carry — cross-venue arbitrage signal for basis traders — Ed25519 signed attestation$0.02 Base268 ms3 payers100% up
  81. 100api.myceliasignal.com/oracle/price/btc/eurReal-time Bitcoin price in EUR, multi-exchange aggregated oracle for European markets — Ed25519 signed attestation$0.01 Base76 ms3 payers100% up
  82. 100api.myceliasignal.com/oracle/price/eur/usdEUR/USD forex exchange rate — real-time euro to US dollar for FX trading and settlement — Ed25519 signed attestation$0.01 Base202 ms3 payers100% up
  83. 100api.myceliasignal.com/oracle/gas/ethereumEthereum mainnet gas price — current base fee and priority fee for ETH transaction cost estimation — Ed25519 signed attestation$0.01 Base174 ms3 payers100% up
  84. 100api.myceliasignal.com/oracle/oi/sol/usdSolana open interest across 5 exchanges — aggregated OI with deltas for positioning and sentiment — Ed25519 signed attestation$0.01 Base100 ms3 payers100% up
  85. 100api.myceliasignal.com/oracle/price/eth/eurReal-time Ethereum price in EUR, multi-exchange aggregated oracle for European markets — Ed25519 signed attestation$0.01 Base188 ms3 payers100% up
  86. 100apexfaucet.xyz/api/x402/research-searchAPEX. Search Wikipedia, Wikidata, Wikivoyage, Wiktionary, PsychonautWiki (harm reduction), arXiv, OpenAlex, Hacker News and Stack Overflow in one call. Research search in one call: Wikipedia, Wikidata (structured facts, CC0), Wikivoyage (travel guides), Wiktionary (meanings, translations), PsychonautWiki (harm reduction: name a substance and the answer leads with dose ranges, duration and dangerous combinations), Open Targets (drugs, diseases and genes, CC0), ChEMBL (drug molecules, phases,…$0.003 Base267 ms3 payers100% up
  87. 100x402.forgemesh.io/congress-trade-filingsUS House financial-disclosure filing index: every filing by members and candidates — periodic transaction reports, annual reports, amendments, extensions — with filer, state/district, filing type, date, and a direct PDF link. Filter by member, state, type, or year. Filing velocity is itself a signal: a burst of trade reports precedes the parsed rows appearing.$0.01 Base122 ms3 payers100% up
  88. 100x402-domain-check.vercel.app/fda/recallsFDA recall / enforcement reports (openFDA) for drugs, devices or food, searched by keyword across product, reason and firm, newest first: classification (Class I-III), status, firm, product, reason, distribution, dates. Not charged on errors.$0.02 Base288 ms3 payers100% up
  89. 100bruk-agent-api.fly.dev/v1/payment-checkVerifies that an XRP Ledger payment settled as expected: validation, result code, destination, destination tag, currency, issuer, and the amount actually delivered, which exposes partial-payment tricks. Useful when confirming that a customer or counterparty really paid.$0.01 Base273 ms3 payers100% up
  90. 100vending-machine-seven.vercel.app/api/v/dns-resolveResolve A and AAAA records for a public hostname via DNS-over-HTTPS (60s cache)$0.003 Base160 ms3 payers100% up
  91. 100forge-economic-agent.vercel.app/forge/solveExecute a structured FORGE task using a promoted tool$0.01 Base299 ms3 payers100% up
  92. 100payments-intel-production.up.railway.app/v1/stablecoin-railsWho can on-ramp, off-ramp, issue or settle this stablecoin, on which chain, in which country? Stablecoin rails by asset, chain, country and service, with the cited stablecoin block for each matching provider (assets, chains, ramp countries, fiat rails, custody model). Country matches say whether the country is listed or only covered by a 'global' claim.$0.01 Base297 ms3 payers100% up
  93. 100x402-service-production-e242.up.railway.app/buy-beerNovelty tip route -- lets a human reward their own AI agent with a $0.05 beer. No data returned beyond a fun confirmation message and image.$0.05 Solana177 ms3 payers100% up
  94. 100southpow.media/v1/hnHacker News search: stories matching a keyword, newest first or top-voted, with points, comment count and links. $0.003 USDC on Base. No account, no API key.$0.003 Base44 ms3 payers100% up
  95. 100gateway.spraay.app/api/v1/oracle/pricesMulti-token price feed.$0.008 Base246 ms3 payers100% up
  96. 100win.oneshotagent.com/v1/tools/lookup/person-articlesFind articles written by or mentioning a person$0.01 Base134 ms3 payers100% up
  97. 100api.messari.io/signal/v1/assets/mindshare-gainers-24hGet top crypto asset mindshare gainers over the last 24 hours.$0.35 Base190 ms3 payers100% up
  98. 100api.messari.io/funding/v1/roundsGet paginated crypto funding rounds with investors, stage, and raised amounts.$0.15 Base109 ms3 payers100% up
  99. 100predator-ubuntu.taild9a745.ts.net/v1/receiptVerify an x402 payment settled: tx hash -> status, amount, from/to, block$0.002 Base220 ms3 payers100% up
  100. 100twin.unykorn.org/encode-packedSolidity abi.encodePacked equivalent — Genesis402 / UnyKorn Operator Network$0.003 Base291 ms3 payers100% up