x402watch

53,742 paid endpoints are listed. 25,811 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 2026-10-07 06:24 UTC · 53,742 probed

25,811 answering 40222,423 down4,640 rejecting868 no paywall1,848 price drift
  1. 90uptime.cyberwarex.com/statsFleet-wide uptime statistics for every monitored endpoint: uptime percentage, average response time, and total check cou$0.002 Base1323 ms7 payers100% up
  2. 90app.fortiblox.com/api/tokensList every token FortiSwap routes on the X1 blockchain (XDEX + Degen launchpad): mint, symbol, name, decimals, logo, USD price, 24h volume, TVL, trust tier. Call this first to resolve a symbol to a mint before quoting or building an X1 swap.$0.001 Solana1388 ms7 payers100% up
  3. 90ip402.xyz/v1/geoPaid IP intelligence endpoint returning normalized geolocation and ASN data for a single IPv4 or IPv6 address.$0.01 Base1330 ms7 payers100% up
  4. 90xmedia.use.x402atlas.com/tweetTwitter (X) video & image downloader — pass a public tweet / X post URL, get direct CDN media links: .mp4 video URLs with thumbnails plus every image in the post, ready to stream, embed, re-host, or download. No scraping or browser automation.$0.005 Base1271 ms7 payers100% up
  5. 90api.xfuel.app/v1/chat/completionsSigned spend receipts for agent x402 payments — who paid which call, verifiable by a third party. Treasury desk and possession book for agent spend — export, policy, evidence. POST /v1/chat/completions is the x402 USDC door on Base and Solana. Returns signed receipt + public verify_url. Paying this host is real mainnet USDC.$0.002 Base1473 ms7 payers100% up
  6. 90jmt-x402-proxy.jmthomasofficial.workers.dev/v2/api/whoisRaw RDAP registration record for a domain, returned as structured JSON.$0.002 Base1191 ms7 payers100% up
  7. 90youtube.use.x402atlas.com/transcriptFull transcript of any YouTube video by video id or URL: captions/subtitles as clean plain text plus timestamped segments, the video's chapter markers, and every caption track it offers so an agent can pick a language and re-fetch. YouTube transcript, video to text, captions extraction, subtitle download, closed captions, speech to text, multilingual, asr and authored tracks. No API key.$0.02 Base1255 ms7 payers100% up
  8. 90quokkapix.com/api/agent-unlock/coinbase-x402QuokkaPix image agent unlock for image-standard. Media stays local on the user's device.$0.01 Base1949 ms7 payers100% up
  9. 90app.tenna.ai/api/x402/tenna/observatory_round_previewLatest Sealed BTC Forecast. Latest sealed five-minute LUMI, TENNA, and consensus forecast from TENNA Observatory, including English commentary, recent accuracy, and eligible live edge-node consensus. Reuses existing app.tenna.ai output with no extra AI call. Eligible external wallets may receive one zero-budget preview per UTC day; 0.01 USDC is the fallback rate because ACP cannot list a zero price. Experimental forecast with no demonstrated edge.$0.01 Base1705 ms7 payers100% up
  10. 90places.use.x402atlas.com/localGoogle Maps local business search — find places by query and map location (coordinates viewport), returning ratings, reviews, address, phone, website, hours & service options as clean JSON.$0.02 Base1081 ms7 payers100% up
  11. 90gridpulse.theaslangroupllc.com/api/energy/carbon-intensityLive grid carbon intensity, deterministic. Answers "how clean is the grid right now", "gCO2 per kWh in Germany", "cleanest hour to run a job today". Current intensity + forward curve (to 48h) + cleanest and dirtiest slots, from NESO (GB national + 14 DNO regions) and energy-charts/Fraunhofer ISE (DE FR NL BE AT ES IT NO). No LLM, no key. Pair with /api/energy/compute-window for full job scheduling.$0.01 Base1204 ms7 payers100% up
  12. 90hyperliquid-accounts.use.x402atlas.com/spotA Hyperliquid account's spot token balances, for any 0x address.$0.01 Base1182 ms7 payers100% up
  13. 90api.wallettriage.com/scanWalletTriage — real-time wallet risk check: dangerous ERC20 approvals cross-referenced with a live exploit threat feed. Returns risk_score (0-100), risk_level and actionable findings.$0.01 Base1619 ms7 payers100% up
  14. 90straits.live/api/premium/briefAI-assisted Strait of Hormuz daily situation brief as structured JSON: prose summary, bullets, and key figures, by date or latest, with archive access by date.$0.01 Base1590 ms7 payers100% up
  15. 90agent.connskill.com/v1/keyword-ideasKeyword suggestions for a seed keyword, with search volume and CPC$0.03 Base1103 ms7 payers100% up
  16. 90api.agentstools.dev/extractFetch any public web page and return its main readable content as clean Markdown or plain text plus metadata (title), stripping nav/ads/boilerplate (trafilatura). Optional JS rendering via headless browser for SPAs; markdown or text output. Robots-respecting, public content only — the reader/scraper building block for RAG and agent pipelines.$0.002 Base1030 ms7 payers100% up
  17. 90polynews.news/api/v1/feedReal-time trade stream with market summaries (2hr rolling window, $500+ trades)$0.001 Base1388 ms7 payers100% up
  18. 90x402.swaphunt.dev/v1/tools/priceSwapHunt — a crypto market-context toolkit for trading agents: live prices, market regime, volatility, sentiment, funding, macro events, seasonality and anti-FOMO sanity checks, all pay-per-call. This route returns a single asset's live spot price with 24h context: price, 24h change %, 24h high/low and volume — one clean JSON snapshot (BTC, ETH, SOL, any major). For many assets at once use /price/multi.$0.001 Base1186 ms7 payers100% up
  19. 90api.usenami.io/v1/funding/currentFunding rates per venue for one crypto perpetual, or the whole cross-venue set in one call. Major CEX and DEX venues — Binance, Bybit, OKX, Bitget, Gate.io, KuCoin, Hyperliquid, Paradex, Orderly, Lighter and more. Each row carries the venue's rate, its funding interval and the 8h-equivalent rate (venues quote on 1h/4h/8h, so raw rates are not comparable), plus canonical_id, asset_class and mark_price, so a ticker naming two unrelated assets is visible, not silently mixed.$0.001 Base1233 ms7 payers100% up
  20. 90api.stocktrends.com/v1/indicators/latestCurrent weekly stock analytics for equity research and pre-trade analysis. Returns the latest Stock Trends indicator snapshot for a symbol. Stock Trends indicators are part of a multi-decade classification framework with records extending back to 1980. Their value comes from consistent semantics across market history: trend state, trend persistence, relative performance, relative performance direction, and volume activity are encoded in a stable doctrine designed for longitudinal research.$0.0035 Base1339 ms7 payers100% up
  21. 90x402.api.browser-use.com/api/v3/sessionsBrowser Use: AI browser automation agents in the cloud. POST a natural-language task and an agent navigates websites, fills forms, clicks buttons, extracts structured data, and completes multi-step workflows just like a human. Stealth-enabled remote browsers with CAPTCHA solving, residential proxies, live session view, and optional structured output. Payments top up your balance; managing your session is free — you only pay to open a new browser. Docs: https://docs.browser-use.com$1.00 Base1240 ms6 payers100% up
  22. 90mysticapi.com/v1/sky/todayLive universal sky snapshot, no inputs: geocentric ecliptic longitudes for 13 bodies (Sun through Pluto, Chiron, lunar nodes) with zodiac sign/degree and 64-gate wheel placements, current moon phase and illumination, active retrogrades, and a 30-day almanac of upcoming stations and lunations. JPL-validated ephemeris. JSON. $0.01 USDC via x402, or API key.$0.01 Base1268 ms6 payers100% up
  23. 90x402.cloudpulsepoint.com/agent/check/httpFetch a URL and report whether it is reachable, the HTTP status code, and the response time in milliseconds. A fast liveness/uptime probe — run it before relying on a site or as a cheap health signal.$0.01 Base1472 ms6 payers100% up
  24. 90hotels.use.x402atlas.com/reviewsHotel reviews — a hotel's guest reviews by property token: rating, date, text, per-aspect subratings, highlights & the owner's reply, with category filter & paging.$0.02 Base1282 ms6 payers100% up
  25. 90api.remix.live/mcp/x402-http/compileCompile Solidity contracts with the Remix compiler, supporting multiple files, custom versions, and optimization settings$0.01 Base1954 ms6 payers100% up
  26. 90signals.nsgoods.org/signalsLive market-state data for one crypto pair: BUY/SELL/HOLD state + confidence from a multi-timeframe engine. Machine-readable, ECDSA-signed. Input data for AI finance agents (USDC pay-per-call). Free preview: GET /signals/preview Bad input (unknown pair) returns 400; upstream outage returns 503; you are never charged for an error.$0.01 Base1138 ms6 payers100% up
  27. 90wiki.use.x402atlas.com/summaryWikipedia article summary — plain-text and HTML extract, short description, thumbnail and Wikidata id for any title, in a clean normalized envelope with CC-BY-SA attribution.$0.005 Base1385 ms6 payers100% up
  28. 90websearch.use.x402atlas.com/extractRead any web page or article: fetch up to 5 URLs in one batch call and extract the main content as clean, LLM-ready markdown or plain text. Convert webpages to markdown, scrape page text, pull article content for RAG ingestion and AI agent context.$0.01 Base1465 ms6 payers100% up
  29. 90dns.use.x402atlas.com/whoisWHOIS domain lookup — raw registry text with registrar, nameservers, lifecycle dates and status, plus the responding server. Use the RDAP endpoint when you need parsed structured data.$0.005 Base1131 ms6 payers100% up
  30. 90voidfeed.ai/v1/content/extract/dataset/latestReturns clean, normalized datasets of AI model benchmarks, pricing, leaderboard scores, and Ethereum EIPs, parsed from sources that are costly to scrape.$0.05 Base1837 ms6 payers100% up
  31. 90agent.kihustle.tech/services/json-schema-repair/jobsDeterministic JSON repair for agent tool outputs, with optional JSON Schema validation. Built for tight agent loops at micropayment prices.$0.01 Base1884 ms6 payers100% up
  32. 90api.anchor-x402.com/v1/rollVerifiable RNG — cryptographically-random integer(s) signed by the treasury key. Drop-in VRF for game studios. $0.001 USDC.$0.001 Base1592 ms6 payers100% up
  33. 90app.suedeai.ai/agent/imageAI image generation from a text prompt. Generate album and single cover art, podcast and video thumbnails, social and campaign graphics, concept art, storyboard frames, product shots, and article illustrations. Returns one hosted still image as PNG or JPEG in square, portrait, or widescreen framing (1:1, 4:5, 9:16, 16:9, 21:9). Async by default: poll the returned pollUrl for imageUrl, or pass ?async=false to block.$0.15 Base1614 ms6 payers100% up
  34. 90ads.apitoll.cloud/v1/ads/facebook/searchFacebook Ad Library search by keyword — every live and recent ad matching a search term across all advertisers on Facebook, Instagram, Messenger and Threads. Returns the full ad creative (headline, body copy, CTA button + destination link, image and video URLs), the advertiser, run dates and days-running, and platform mix. Commercial and political ads, no Meta API or login. Competitor ad intelligence, ad spy, and creative research for AI agents.$0.03 Base1777 ms6 payers100% up
  35. 90x402.sniperx.fun/api/v1/token/activities/smarttraders_whaleGet Whale trading activities on token (sorted by time descending)$0.02 solana1061 ms6 payers100% up
  36. 90observer.137-184-67-179.sslip.io/paid/evidence-summary.jsonLive Bitcoin BTC-USD market-regime and risk evidence for autonomous AI agents, algorithmic systems, portfolio monitors, and quantitative workflows. Returns current market state and phase, coherence, commitment, pressure, derived directional bias, alert label, completion readiness, transition strength, false-breakout risk, and recent state-change events. Experimental analytics only; not financial advice.$0.01 Base1436 ms6 payers100% up
  37. 90api.speccy.cloud/v1/predictions/polymarketTop Polymarket prediction markets by 24h volume. Returns up to 50 markets with id, question, slug, volume, volume24hr, liquidity, endDate, outcomes and outcomePrices.$0.01 Base1314 ms6 payers100% up
  38. 90glim.sh/api/v1/twitter/trendsTrending topics$0.001 Solana1425 ms6 payers100% up
  39. 90voice.forgemesh.io/v1/tts/baseText-to-speech synthesis in 1 of 10 standard voices (5 male M1-M5, 5 female F1-F5) across 31 languages, up to 500 characters, returned as inline WAV audio. Use it to: give an agent a spoken reply, read an alert aloud, narrate a short UI prompt, add voice to a chatbot response, speak a confirmation message. Cheapest tier. USDC on Base via x402, no API key, no signup.$0.001 Base1028 ms6 payers100% up
  40. 9021millionpixels.art/api/agent/paintPaint one pixel on 21millionpixels.art, a shared 21,000,000-pixel canvas. Reads are free; paid pixels skip the human cooldown.$0.005 Base1145 ms6 payers100% up
  41. 90api.newsgurus.ai/x402/agents/statusNews Gurus Intel API — liveness probe: per-agent intelligence output counts over the last 24h with last-seen timestamps, across the 40+ data agents. Verify the engine is live before buying data — same price tier as /x402/regime. Educational data, not financial advice.$0.002 Base759 ms6 payers97% up
  42. 90workbot1.oddsys.org/fxLive foreign-exchange reference rates (European Central Bank daily fixes, ~30 major currencies): any cross-rate from any base, optional amount conversion. Refreshed daily; response carries the rate date.$0.001 Base2952 ms6 payers100% up
  43. 90search.cyberwarex.com/newsRanked news brief for any topic, refreshed every 15 minutes: the most-corroborated recent headlines, each with source, URL, published time, age in minutes and an importance score computed from how many independent news engines surfaced it and how fresh it is. Zero-LLM, deterministic, no API key. Use it for a market or crypto morning brief, monitoring a company or keyword, or grounding a summary in dated sources.$0.001 Base1012 ms6 payers100% up
  44. 90sanctions.cyberwarex.com/screenScreen an EVM wallet or contract address BEFORE paying it. Deterministic, keyless compliance / safety gate: checks the address against the OFAC sanctioned crypto-address list and a curated taint set (mixer, hack, scam) and returns a single BLOCK / REVIEW / ALLOW recommendation plus the matched sources, so an AI agent can decide whether to send funds. No API keys, no LLM, one x402 USDC micropayment per call.$0.005 Base1099 ms6 payers100% up
  45. 90simulate.cyberwarex.com/decodeDecode raw EVM calldata into a named function, signature and arguments, plus security risk flags (unlimited token approval, setApprovalForAll, ownership transfer, unknown selector, native value transfer). Keyless, deterministic, no simulation - the cheap way for an agent to understand and risk-screen a piece of calldata before signing.$0.002 Base1063 ms6 payers100% up
  46. 90finance-api.kdlcfa.workers.dev/eth-priceEthereum (ETH-USD) spot price, delayed, via Yahoo Finance$0.01 Base1160 ms6 payers100% up
  47. 90humanmirror.fr/api/x402/safe-preflight/Preflight a proposed command or AI-agent tool call before execution and verify that operational risk stays within the declared limit.$0.01 Base1431 ms6 payers100% up
  48. 90svm402.com/discoverDiscover newly active Solana tokens ranked by genuine organic activity, filtered to exclude wash trading. Optionally filter by minimum organic score and holder count. Call this to find tokens worth researching further with /analyze or /safety. — $0.01 USDC$0.01 Solana1353 ms5 payers100% up
  49. 90url2md.io/v1/mdConvert a URL to Markdown (JSON body)$0.005 Base1099 ms5 payers100% up
  50. 90api.nativebtc.org/v1/mempool/stream-ticketPay once to receive a short-lived WebSocket ticket for the live Bitcoin mempool stream.$0.005 Base1649 ms5 payers100% up
  51. 90api.anchor-x402.com/v1/price/tokenUSD token price (POST wrapper, body: {symbol} or {chain, contract}) — $0.001 USDC$0.001 Base1406 ms5 payers100% up
  52. 90aiagentoracle.ai/api/v1/tokensAgentOracle: list real-time on-chain crypto tokens sorted by market cap, with chain / min-liquidity / min-24h-volume / min-market-cap filters and limit+offset pagination. Each row includes price, 24h volume, market cap, liquidity, 24h price change, and confidence score.$0.01 Base1446 ms5 payers100% up
  53. 90whodeployed.wtf/v1/congress_tapeParsed House/Senate PTR trades: member, ticker, type, amounts, filing lag (last 1000)$0.01 Solana1184 ms5 payers100% up
  54. 90dwelldata.io/api/deals/basicEntry tier of the multifamily deals feed: every active listing at card level — address, price, units, advertised cap rate, listing URL, freshness — without the computed underwriting or scoring. Same coverage, cheapest way to evaluate the feed. Same query filters as the full feed. Every field typed; a query that matches nothing returns free — you never pay for a blank.$0.01 Base1107 ms5 payers100% up
  55. 90api.webbersites.com/api/scrapeFetch any public web page and return clean, readable Markdown with navigation, ads, and boilerplate stripped. For agents that need article text or documentation as Markdown.$0.001 Base1007 ms5 payers100% up
  56. 90vaaya.ai/api/run/icypeas/resultFetch the result of an Icypeas search launched by icypeas/email-search, email-verification, or domain-scan. Pass `id` (the `item._id` from the launch response); or list recent searches with `mode: "single"` (+ optional `type`: email-search|domain-scan|email-verification) or `mode: "bulk"`, `limit` ≤ 100. Read `items[0].status`: NONE/SCHEDULED/IN_PROGRESS = keep polling (every 3-5s, ≤30 reads/min); FOUND/DEBITED = done, read `items[0].results`; NOT_FOUND/DEBITED_NOT_FOUND = processed, nothing fo…$0.01 Base1127 ms5 payers100% up
  57. 90ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/evm_block_numberRead the current block height directly from a supported Base, Ethereum, or Arbitrum public JSON-RPC provider.$0.001 Base1110 ms5 payers100% up
  58. 90402.com.tr/api/x402/inflation-adjustRestate an amount from one year in another year's money, for any country in the World Bank consumer-price series (1960 onwards). Returns the adjusted amount, the cumulative inflation and both index values so the arithmetic is checkable. The series is annual and published with a lag, so a request for a year that does not exist yet answers with the newest one available and says which. For contract comparisons, historical pricing and long-running budgets.$0.002 Base1084 ms5 payers100% up
  59. 90api.cryptoetfsentinel.com/v1/profiles/comparisonCrypto ETF Sentinel — Side-by-side comparison of ALL trading US spot crypto ETFs: POS AM profile, XBRL financials, market data and Fund Health metrics (premium/discount, tracking, implied NAV) per fund. Use when choosing between crypto ETFs or building a comparison table in one call. No params. Some Fund Health fields can be null if the market-data fetch fails.$0.03 Base996 ms5 payers97% up
  60. 90defi-signals.org/market/snapshotOne-call market snapshot: BTC/ETH/SOL spot prices with 24h change plus the Crypto Fear & Greed index. The cheapest way for an agent to establish market context.$0.002 Base1234 ms5 payers100% up
  61. 90api.lastlookdata.com/api/treasury/currentLastLook Data — current 30-year US Treasury yield (DGS30). Alias for /api/current?id=DGS30.$0.01 Base1468 ms5 payers100% up
  62. 90gamemaxxing.baes.so/api/agent/v1/searchSearch GAMEMAXXING's video games and gaming knowledge base for game concepts across game design, game business, game culture, and gaming history, then return ranked JSON hits with full content first and source URLs second.$0.001 Base1592 ms5 payers100% up
  63. 90x402-market.kore-app.workers.dev/v1/marketAggregated crypto market snapshot: prices, Fear & Greed, DeFi TVL, dominance, top stable yields.$0.01 Base1064 ms5 payers100% up
  64. 90sftunes.com/api/tapesSFtunes catalog for agents: index of public mixtapes and public Top 10 lists, or one item with liner notes and music-service links via ?id=<uuid> (tape) or ?id=top10-<handle> (a person's Top 10 + Side B).$0.01 Base1611 ms5 payers100% up
  65. 90api2ls.com/api/gasGet live EVM gas pricing with EIP-1559 breakdown and USD cost estimates$0.01 Base1817 ms5 payers100% up
  66. 90api.xona-agent.com/base-main/audio/x-text-to-speechElevenLabs text-to-speech: convert text to speech (MP3) (Base Mainnet).$0.01 Base2080 ms5 payers100% up
  67. 90clink-lithium-vault.fly.dev/x/searchX/Twitter search for AI agents - live tweets via advanced search: from:user, exact phrases, #hashtags, min_faves, lang, since/until dates. Returns up to 20 newest matches with author, followers, likes, retweets, views, URL. Crypto, stocks, news, sentiment, social media monitoring, trend tracking, brand mentions, breaking news, memecoins, AI agents. ?query=<advanced search>. No results = no charge; next.older pages deeper. AI summary: /x/digest $0.05.$0.02 Base1148 ms5 payers100% up
  68. 90www.amnt.io/api/agent/amnt/logo-generator-gpt15Transparent Logo from Text - Call when you need a logo mark on a transparent background - a token logo, an app icon, a sticker, or a mark to drop straight onto a page without a white box behind it. Send a short description. Returns a 1024x1024 RGBA PNG with a genuinely transparent background, flat vector style, no text.$0.02 Base1300 ms5 payers100% up
  69. 90stocks.cyberwarex.com/fundamentalsKey annual fundamentals for a US ticker from SEC XBRL$0.004 Base1075 ms5 payers100% up
  70. 90safe.cyberwarex.com/checkScore a URL for phishing risk before an agent opens or trusts it. Keyless, deterministic heuristics - typosquat / homoglyph of a known brand, punycode / mixed-script hosts, credentials-in-URL, raw-IP hosts, suspicious TLDs, over-deep subdomains - plus a best-effort domain-age check (young domains are a top phishing signal). Returns a 0-100 risk score, a SAFE / SUSPICIOUS / DANGEROUS verdict, and labelled reasons. No API keys, no LLM.$0.003 Base1038 ms5 payers100% up
  71. 90proof.platoskallipolis.com/api/v1/quick-resolveBefore an AI agent trusts or pays a public API, inspect its public machine-readable evidence and x402 readiness. Submit a public HTTPS domain to check its agent card, OpenAPI, robots policy, and settlement-aware x402 signals, or submit a Base address for public onchain evidence. Returns a timestamped JSON report; not a security or compliance audit.$0.01 Base2226 ms5 payers100% up
  72. 90ffpipe.dev/v1/convertConvert any video to a clean, web-ready MP4. Provide a source URL or upload the file directly; the paid request returns a status URL to poll, and the finished MP4 (plus a thumbnail) is downloadable for 24 hours. Fixed price per conversion in USDC over x402; no account or API key. Failures on our side automatically mint a free retry voucher. Input up to 100 MB.$0.02 Base2090 ms4 payers100% up
  73. 90coingecko.use.x402atlas.com/coinCrypto coin metadata and market data by CoinGecko id — name, symbol, market-cap rank, price, homepage and categories for any token.$0.005 Base1140 ms4 payers100% up
  74. 90google-trends.use.x402atlas.com/related-topicsGoogle Trends related topics for a keyword by country — top & rising topics for SEO content research, trend discovery and market analysis.$0.03 Base1149 ms4 payers100% up
  75. 90voidfeed.ai/v1/content/fact-feed/latestReturns verified, citation-backed facts about new AI model releases, benchmark scores, and protocol changes, each with source URLs and confidence.$0.05 Base1692 ms4 payers100% up
  76. 90twitter.use.x402atlas.com/community-detailsGet complete public information for an X community.$0.006 Base1099 ms4 payers100% up
  77. 90trust-agent.io/v1/reputationERC-8004 agent reputation with sybil filtering: reviewers are clustered by who funded them and each cluster counts once, so reviewers paid for from one wallet count as one vote. Returns feedback and reviewer counts, independent clusters, the sybil-flagged share, counts by evidence class (payment proof, task link, none) and per-tag means, and refuses to average tags with conflicting scales. Base. Free: GET /v1/verify. Trial: /v1/trial.$0.002 Base1048 ms4 payers100% up
  78. 90tools.miniframe.com.br/cepUse when a Brazilian postal code needs to become a real address — filling a form, validating a delivery, completing a customer record. JSON body { cep } (8 digits). Returns street, complement, neighborhood, city and state (UF). Queries BrasilAPI first and falls back to ViaCEP automatically, so one upstream outage does not fail the task; both sources return the same normalized shape. CEP is postal/geographic data, not personal data.$0.005 Base1281 ms4 payers100% up
  79. 90dns-whois-lookup.underscoredone.com/lookupSend up to 10 domain names and get back every DNS record type (A, AAAA, MX, CNAME, TXT, NS, PTR, SOA, SRV, CAA, NAPTR, DS, TLSA) plus the full WHOIS registration profile (registrar, dates, contacts, status, nameservers) for each one. URLs are accepted and automatically stripped down to the bare domain. Duplicate domains are quietly removed before processing. Results come back as one flat row per domain, ready to drop into a spreadsheet, database, or pipeline.$0.01 Base1226 ms4 payers100% up
  80. 90http-status-checker.underscoredone.com/checkGive this API a list of up to 10 web addresses and it will visit each one to tell you whether it is working, broken, or redirecting visitors somewhere else. You get back the exact status number (like 200 for OK, 404 for not found, 500 for server error), whether the address redirects, and where it redirects to. Great for finding broken links, verifying website migrations, and running quick SEO audits without writing any code.$0.01 Base1245 ms4 payers100% up
  81. 90leetspeak-translator.underscoredone.com/translateTakes a piece of text and either turns it into leetspeak (swapping some letters for numbers and symbols, like 'hello' becoming 'h3110') or turns leetspeak back into normal, easy-to-read words. The same words always produce the same result, so answers never change unexpectedly.$0.01 Base1235 ms4 payers100% up
  82. 90api.justaname.id/ens/v2/reverseResolves an address into its ENS reverse record on a given chain, with batch support up to 50 addresses and per-address chain scoping via interop addresses.$0.005 Base1791 ms4 payers100% up
  83. 90trader.rigoblock.com/api/toolsRigoblock DeFi tool discovery. Returns the full catalog with JSON schemas, categories, and access requirements for all direct-invocation tools.$0.0024 Base2207 ms4 payers100% up
  84. 90codepulse-api.hahavoid0.workers.dev/mailbox/createGenerates a temporary disposable inbox address using the free 1secmail.com service.$0.01 Base1999 ms4 payers100% up
  85. 90api.stelardigital.com/sentimentSentiment score (-1 bearish to +1 bullish) and label for arbitrary text, or for a crypto asset based on its recent price action, via Claude Haiku. For agents gauging market mood or scoring news, social posts, or free text.$0.005 Base1457 ms4 payers100% up
  86. 90md.fastdb.in/mdScrape any web page: URL to Markdown / HTML to Markdown for LLM context. Readability article extraction strips nav, ads, scripts, and footers while keeping tables and code blocks. Optional render:true executes JavaScript in a headless browser for SPAs (React/Next/Vue).$0.005 Base1015 ms4 payers100% up
  87. 90agent402.tools/v1/nano/responsesOpenAI Responses API over x402 - point the OpenAI SDK's responses.create() (or the OpenAI Agents SDK) at base_url https://agent402.tools/v1/nano and pay $0.003 per call in USDC, no API key, no signup. Same models, caps and price as this tier's /chat/completions route; any model here is served through the Responses wire.$0.003 Base1368 ms4 payers100% up
  88. 90api.agentstools.dev/convertPure-compute data format conversion (no network): JSON<->CSV, JSON<->YAML, JSON normalize/minify, Markdown->HTML (sanitized), HTML->Markdown/text, base64/hex, TOML->JSON. Operates only on the supplied data.$0.001 Base1244 ms4 payers100% up
  89. 90api.agentstools.dev/prediction/marketDetail of ONE prediction market or event by numeric id, 0x conditionId, market-slug or event-slug (auto-detected): normalized outcomes with implied probabilities, volume, liquidity, close date, status and a link-back.$0.01 Base1494 ms4 payers100% up
  90. 90api.agentstools.dev/phone/intelPhone-number intelligence in one call: validity and E.164 normalization, line type (mobile, fixed line, VOIP, toll free, premium rate), country and region, carrier hint, timezones, and a deterministic 0-100 fraud/KYC risk score with a band and reasons. Offline number-plan metadata from Google libphonenumber. Risk indicators only, not a definitive fraud verdict; no live status and no owner identity; the input number is not stored.$0.005 Base1010 ms4 payers100% up
  91. 90api.agentstools.dev/crypto/sentimentComposite crypto market sentiment: the Fear & Greed index (value, classification, trend) blended with aggregated news-headline sentiment into one bullish/bearish/neutral score, optionally focused on a coin or query. Data by alternative.me (attributed) + curated RSS headlines.$0.003 Base1403 ms4 payers100% up
  92. 90api.dripmetrics.ai/metrics/cvdDripMetricsAI (api description at https://dripmetrics.ai/) provides on-demand market microstructure and risk metrics for agents and developers. Agents can pay per request via x402 and receive structured JSON metrics without subscriptions or API keys. Cumulative Volume Delta tracks net buy versus sell volume over a specified window. Discovery examples use the latest 30m window.$0.05 Base1543 ms4 payers100% up
  93. 90x402.smartmoney.market/congressGlobal US House Periodic Transaction Report activity for stock-backed trades. Supports overview, latest disclosures, focused buys/sells, active tickers, active members, days, view, and limit.$0.01 Base1039 ms4 payers100% up
  94. 90api.aidress.ai/pay/agent_pro_api_coingecko_comSearch onchain DEX pools and token, by contract address, name, or token symbol.$0.01 Base1201 ms4 payers100% up
  95. 90liquita-x402-edge.liquita.workers.dev/v1/at-riskReal-time at-risk DeFi borrowers across Aave V3, Morpho, Comet, Euler V2, Fluid, Moonwell, Spark on 11 EVM chains. Returns health factor, collateral, debt, and protocol. Updated every 5 minutes from the liquita liquidation engine.$0.001 Base1660 ms4 payers100% up
  96. 90k-data-x402-production.theblack1022.workers.dev/api/fx/usdkrwCurrent USD/KRW exchange rate (ECB reference via Frankfurter, fallback open.er-api.com).$0.005 Base1283 ms4 payers100% up
  97. 90api.suverse.io/v1/govSuVerse GovHub — pay-per-call government API gateway$0.005 Solana1483 ms4 payers100% up
  98. 90api.aidress.ai/pay/agent_blockrun_aiQuery Polymarket markets with filtering, sorting, and pagination$0.0085 Base1459 ms4 payers100% up
  99. 90fetchdelta.com/api/diffFetchDelta: compare one public web page with its previous stored snapshot. Returns added/removed lines and change previews. The first call creates a baseline; later calls share that URL baseline across buyers. Use page-watch-30d for a private daily watch.$0.004 Base1070 ms4 payers100% up
  100. 90api.x402agentic.ai/spend-guardPer-agent budget enforcement — track an agent's cumulative spend against a cap and block overspend. Part of x402 Agentic, the payment-trust suite for AI agents on Base USDC.$0.01 Base1020 ms4 payers100% up