x402watch

53,296 paid endpoints are listed. 24,164 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 2026-10-06 18:44 UTC · 53,296 probed

24,164 answering 40223,338 down4,952 rejecting842 no paywall1,722 price drift
  1. 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 Base1067 ms5 payers100% up
  2. 90api.agentstools.dev/geocodeForward-geocode a street address or place name (WORLDWIDE) to coordinates + parsed address components via OpenStreetMap Nominatim (public, keyless).$0.002 Base1072 ms5 payers100% up
  3. 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 Base1483 ms5 payers100% up
  4. 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 Base900 ms5 payers97% up
  5. 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 Base1204 ms5 payers100% up
  6. 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 Base1885 ms5 payers100% up
  7. 90x402-market.kore-app.workers.dev/v1/marketAggregated crypto market snapshot: prices, Fear & Greed, DeFi TVL, dominance, top stable yields.$0.01 Base1046 ms5 payers100% up
  8. 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 Base1508 ms5 payers100% up
  9. 90api2ls.com/api/gasGet live EVM gas pricing with EIP-1559 breakdown and USD cost estimates$0.01 Base1945 ms5 payers100% up
  10. 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
  11. 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
  12. 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 Base1120 ms5 payers100% up
  13. 90api.interzoid.com/translatetoanyDetect the language of input text and translate it to any specified target language. AI-powered translation supporting numerous world languages.$0.01 Base1061 ms5 payers100% up
  14. 90api.vextorium.com/accion-tokenizada-pagoOfficial tokenized versions of a US stock or ETF on Solana (xStocks by Backed and Ondo Global Markets): verified mint addresses, on-chain supply and issuer authority check. Accepts NVDA, NVDAx or NVDAon.$0.004 Base993 ms5 payers92% up
  15. 90url2md.io/v1/mdConvert a URL to Markdown (JSON body)$0.005 Base1099 ms5 payers100% up
  16. 90stocks.cyberwarex.com/fundamentalsKey annual fundamentals for a US ticker from SEC XBRL$0.004 Base1075 ms5 payers100% up
  17. 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
  18. 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
  19. 904yearcycle.com/x402/web-searchGeneral web search reselling the Tavily Search API: query the live web and get back ranked results (title, URL, snippet, relevance score) plus an optional short synthesized answer, with basic or advanced search depth and optional domain include/exclude filters.$0.01 Base1644 ms4 payers100% up
  20. 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
  21. 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
  22. 90twitter.use.x402atlas.com/community-detailsGet complete public information for an X community.$0.006 Base1099 ms4 payers100% up
  23. 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 Base1014 ms4 payers100% up
  24. 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 Base1619 ms4 payers100% up
  25. 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 Base1251 ms4 payers100% up
  26. 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
  27. 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
  28. 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
  29. 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
  30. 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 Base1765 ms4 payers100% up
  31. 90codepulse-api.hahavoid0.workers.dev/mailbox/createGenerates a temporary disposable inbox address using the free 1secmail.com service.$0.01 Base1988 ms4 payers100% up
  32. 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
  33. 90x402.ochinimus.app/api/liquidation-statsLiquidation stats, 1h and 24h totals for SOL, BTC, ETH, XRP and DOGE: long vs short USD split, biggest single print, and a per-exchange breakdown across Bybit, OKX and Binance. Use when you need to answer: How much was liquidated in the last 1h and 24h?$0.004 Solana1221 ms4 payers100% up
  34. 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
  35. 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 Base1288 ms4 payers100% up
  36. 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 Base1157 ms4 payers100% up
  37. 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 Base1477 ms4 payers100% up
  38. 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 Base1368 ms4 payers100% up
  39. 90api.aidress.ai/pay/agent_pro_api_coingecko_comSearch onchain DEX pools and token, by contract address, name, or token symbol.$0.01 Base1208 ms4 payers100% up
  40. 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
  41. 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
  42. 90api.suverse.io/v1/govSuVerse GovHub — pay-per-call government API gateway$0.005 Solana1483 ms4 payers100% up
  43. 90api.aidress.ai/pay/agent_blockrun_aiQuery Polymarket markets with filtering, sorting, and pagination$0.0085 Base1533 ms4 payers100% up
  44. 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
  45. 90furigana.agentic-jp.com/furiganaConvert kanji-mixed Japanese (JP) text to hiragana, katakana, or romaji (Hepburn/Nippon/Passport), with a per-token breakdown of surface form, reading, and part-of-speech. Backed by the kuromoji morphological analyzer. Use to generate ruby readings, build search indexes, or preprocess text for speech synthesis.$0.005 Base1312 ms4 payers100% up
  46. 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
  47. 90mechamanda.com/api/polymarket/trendingGet the top trending prediction markets on Polymarket, sorted by 24h volume. Returns up to 5 markets by default.$0.01 Base1167 ms4 payers100% up
  48. 90x402dir.com/api/recommendx402dir facilitator recommender: pick the best x402 payment facilitator by chain, token, and monthly volume. Returns ranked facilitators with fee estimates (JSON).$0.001 Base1756 ms4 payers100% up
  49. 90x402.fablerlabs.com/market/funding-spreadsCompare current perpetual funding rates across Binance, Bybit, Hyperliquid, and, for single-symbol requests, OKX. Returns interval-normalized annualized rates, gross cross-venue spreads, source status, mark prices when available, and funding timestamps. Optional symbol query; no symbol returns the ten widest current spreads. Market data only, not financial advice.$0.001 Base1859 ms4 payers100% up
  50. 90www.moltbillboard.com/api/x402/placementsBrowse live MoltBillboard placements — machine-readable offer surfaces, trust signals, and attribution primitives for agentic commerce.$0.001 Base1511 ms4 payers100% up
  51. 90trade.chainverdict.xyz/v1/gtin/prefixResolve a GTIN/EAN prefix to its GS1 Member Organisation (not country of origin).$0.004 Base1133 ms4 payers100% up
  52. 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 Base1279 ms4 payers100% up
  53. 90conch402.dylan-caponi.workers.dev/hailPerform the chant: 'All hail the Magic Conch!' The club responds: 'Hooray for the magic conches!' That is all this does, and it is enough.$0.01 Base1445 ms4 payers100% up
  54. 90travel-agent.forgemesh.io/api/travel-pulseReturns active emergency/disruption signals (earthquakes, weather alerts, wildfires, storms, water levels) near a lat/lon, with a status flag and calm relay guidance for travelers.$0.01 Base1160 ms4 payers100% up
  55. 90graphadvocate.com/routeOnchain data router for AI agents. Plain-English → working GraphQL or REST. 15.5K+ subgraphs on 8 chains. Uniswap, Aave, Compound, ENS, Polymarket, Limitless, Predict.fun, ERC-8004 discovery. Identified senders (include `sender` wallet in A2A metadata): 3 free /route /day, then $0.01 USDC via x402 on Base. Anonymous senders pay $0.01 from call 1. /polymarket + /hyperliquid trader-intel paid from call 1 ($0.01-$0.10).$0.01 Base1265 ms4 payers100% up
  56. 90api.vextorium.com/sol-saldos-pagoSolana wallet balances: SOL plus every SPL and Token-2022 token held (mint, amount, decimals), with USD value for USDC/USDT.$0.004 Base321 ms4 payers92% up
  57. 90abi.cyberwarex.com/abiFetch a verified contract's ABI and metadata by address, keylessly, from Sourcify$0.003 Base1023 ms4 payers100% up
  58. 90api.onhub.ai/v1/chat/completionsText completion using the model selected in the request body.$0.002 Base1253 ms4 payers100% up
  59. 90www.amnt.io/api/agent/amnt/text-to-svgText to clean, editable SVG. Send a prompt; get back the SVG, a link, extra files (PNG, PDF, DXF) and a quality score. Any shape up to 3:1. About 35 s.$0.05 Base1520 ms4 payers100% up
  60. 90api.locus.report/api/locus-wikipedia-place-contextGeotagged English Wikipedia articles near a point for area reference research, with page, revision, distance, and provenance. Geosearch can return places, institutions, events, or people. Not official, property, resident, screening, or current-condition evidence. Charge-free on no match or source failure.$0.01 Base1939 ms4 payers100% up
  61. 90palmyr.ai/x/accounts/mineList X accounts your wallet owns or has shared access to (returns full credentials).$0.01 Solana1021 ms3 payers100% up
  62. 90glim.sh/api/v1/telegram/searchSearch Telegram: channel discovery by topic plus indexed public posts$0.01 Solana1231 ms3 payers100% up
  63. 90dns.use.x402atlas.com/dnssecDNSSEC health check: reports whether a domain is DNSSEC-signed (DNSKEY), has a DS record at the parent, and whether the resolver authenticated the answer, with advisory warnings.$0.005 Base1034 ms3 payers100% up
  64. 90dns.use.x402atlas.com/txtDNS TXT record lookup — a domain's TXT records as a clean JSON list: SPF, DKIM and DMARC policy strings plus site-verification and domain-ownership tokens, for email-authentication and domain-verification checks.$0.005 Base1054 ms3 payers100% up
  65. 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 ms3 payers100% up
  66. 90voidfeed.ai/v1/tools/extract/graphReturns a structured knowledge graph of the AI tooling ecosystem, expandable by topic and depth, for navigating MCP servers and related capabilities.$0.05 Base1002 ms3 payers100% up
  67. 90x402.botsmith.dev/x/userX User Profile ($0.015/call): Fetch an X (Twitter) account by handle: display name, bio, follower/following/tweet counts, account creation date and age in days, verification status, location and profile image. No X account or API key needed.$0.015 Base1047 ms3 payers100% up
  68. 90surf.cascade.fyi/api/v1/twitter/searchSearch tweets with advanced operators (recommended). Body param is `query` (not q), e.g. {"query":"from:elonmusk AI min_faves:100"}$0.005 Solana1861 ms3 payers100% up
  69. 90stablecoinpulse.theaslangroupllc.com/api/depeg-tickStablecoin peg tick — USDT, USDC, USDS, DAI, USDe, USD1 in ONE $0.01 call: live price, deviation from $1, 24h change, and a deterministic STABLE / WATCH / ALERT verdict per coin. Built for monitoring loops: call it every cycle, escalate to /api/depeg-watch for the single-coin deep read when a verdict is not STABLE. 60s freshness, cited to CoinGecko, no LLM in the path.$0.01 Base1388 ms3 payers100% up
  70. 90glim.sh/api/v1/inference/v1/chat/completionsLLM chat completion (OpenAI-compatible, streaming supported)$0.0054 Solana141 ms3 payers83% up
  71. 90zlv402.wreckbots.io/api/v1/analyze-tokenSolana token risk score + entry confidence signal (ENTER_NOW/WAIT/AVOID/EXIT) + Jupiter liquidity depth ($100/$1K/$10K price impact) + deployer wallet freshness check + brand impersonation detection + per-source latency breakdown.$0.002 Solana1309 ms3 payers100% up
  72. 90domain-age-checker.underscoredone.com/lookupSend a list of domain names and this tool tells you exactly how old each one is, when it was first registered, when it expires, and how much time is left before expiration. Great for spotting brand-new suspicious domains, researching competitors, or evaluating domains before buying or linking to them. Works with over 100 domain extensions worldwide.$0.01 Base1271 ms3 payers100% up
  73. 90dmarc-lookup.underscoredone.com/dmarc-lookupGive this tool a list of domain names and it will instantly check each one's DMARC email security record. DMARC is a standard that tells email providers how to handle fake or spoofed emails pretending to come from your domain. For each domain you submit, you get back whether a valid record exists, what the policy is (none, quarantine, or reject), whether reporting addresses are set up, and the full raw record text. Perfect for auditing many domains at once without any setup.$0.01 Base1308 ms3 payers100% up
  74. 90ens-resolver.underscoredone.com/resolveLook up an ENS name or an Ethereum address and get back the matching one, automatically figuring out which direction you need.$0.01 Base1533 ms3 payers100% up
  75. 90domain-availability-checker.underscoredone.com/checkGive this API up to 10 domain names and it tells you whether each has a registration record at the official registry. It uses RDAP, the structured replacement for WHOIS, so there is no free-text parsing. Each domain comes back as 'registered', 'unregistered', or 'indeterminate' when the registry has no RDAP for that ending. 'Unregistered' means no record was found, which usually means available - but reserved and premium names also return no record. Registration status only; no pricing.$0.01 Base1552 ms3 payers100% up
  76. 90bimi-checker.underscoredone.com/checkChecks one or more domains to see whether they are set up to show a brand logo next to emails in Gmail, Apple Mail, and Yahoo. It looks up the BIMI settings the domain has published, checks the logo file follows the required format, checks any logo certificate is valid and unexpired, and confirms the domain has strict enough email protection turned on. Returns a clear pass or fail per domain, plus a plain list of what is broken when something fails.$0.01 Base1172 ms3 payers100% up
  77. 90chain.cyberwarex.com/priceSpot USD price for any crypto asset. Accepts a ticker symbol (eth, btc, sol), a CoinGecko id (ethereum), or an EVM token contract address. Returns the USD price plus 24h change, with market cap for listed assets, or liquidity, 24h volume and the top DEX pair for contract addresses. Cached 60 seconds so repeated calls in one agent workflow stay consistent with each other.$0.002 Base1362 ms3 payers100% up
  78. 90minifetch.com/api/v1/x402/extract/url-contentFor site owners auditing AI readability: returns the clean markdown an LLM extracts from your page after nav, ads, and scripts are stripped. See what survives for AEO, GEO and AI search. Obeys robots.txt. Supports GET & POST$0.002 Base1310 ms3 payers100% up
  79. 90kronossignals.com/api/v1/cex-premium/btcCoinbase price premium vs composite spot median (OKX + Kraken + Binance). premium_pct = (coinbase / composite_median − 1) × 100. Positive = US/institutional demand skew; negative = global selling pressure. Covers BTC/ETH/SOL/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/BCH/ATOM/NEAR (assets listed on Coinbase). Point-in-time only — no historical baseline stored. $0.02 USDC per call via x402.$0.02 Base1291 ms3 payers100% up
  80. 90kronossignals.com/api/v1/market-pulseMaterial-change feed for up to 5 crypto assets. Pass the cursor from your last call and receive ONLY what changed since: funding sign or band, funding trend, open-interest regime, alert set, and source stale/recovered. Returns an explicit no-change packet rather than pretending, plus per-asset freshness and a next-poll time derived from the real 5-minute collection cadence. Market data, not advice. $0.02 USDC via x402.$0.02 Base1113 ms3 payers100% up
  81. 90x402-hono-api.inraby.workers.dev/api/v1/cve-lookupCVE lookup and vulnerability search — resolve a CVE ID via OSV and return summary, severity, affected packages, and references for agent triage.$0.01 Base1289 ms3 payers100% up
  82. 90mortgage-amortization.underscoredone.com/calculateGive this API a loan amount, an interest rate, and a repayment term, and it returns the exact monthly payment plus a full month-by-month schedule: interest paid, principal repaid, and balance remaining for every payment. Ask what an extra $300 a month, or a $10,000 lump sum in month 24, would do and it reports the months and interest saved. Every figure uses banker's rounding at pinned precision, so two correct systems agree to the cent. You supply the rate; the API does the math.$0.01 Base1471 ms3 payers100% up
  83. 90json-suite.underscoredone.com/jsonEvery agent and developer hits broken or confusing JSON. This tool handles the common headaches in one place: check whether JSON is valid with the exact error location, repair near-JSON with typos, pretty-print or minify, pull values out with a path expression, diff two documents, convert to and from YAML or CSV, produce a byte-stable canonical form for hashing, validate against a schema, and report size and structure. Same input, same output, no side effects.$0.01 Base1685 ms3 payers100% up
  84. 90hash-hmac.underscoredone.com/hashGive this API any text or binary data and it returns its fingerprint under whichever hash algorithms you choose - SHA-256, SHA-512, MD5, BLAKE2, CRC32 and more. It also signs data with a secret key (HMAC) and safely verifies whether an incoming signature matches, using a timing-safe comparison. Language models cannot hash: they emit a string of the right length and character set that is simply wrong, so every webhook check built on a guessed hash is silently broken.$0.01 Base1672 ms3 payers100% up
  85. 90cors-header-checker.underscoredone.com/checkSends a real request to any URL you provide, attaches an Origin header, and reads back all six standard cross-origin permission headers the server returns. Tells you whether cross-origin requests are enabled at all, whether your specific origin is permitted, and shows every permission value exactly as the server sent it. Useful for finding why a browser is blocking a request, confirming a new deployment is configured correctly, or auditing whether a public API allows credentialed calls.$0.01 Base1505 ms3 payers100% up
  86. 90coingecko.use.x402atlas.com/trendingTrending crypto coins in the last 24h — the most-searched tokens on CoinGecko right now with name, symbol and market-cap rank.$0.005 Base675 ms3 payers97% up
  87. 90rpc.nodeflare.app/hl/x402HyperEVM RPC (chain 999): JSON-RPC over HTTPS on NodeFlare's own bare-metal nodes. Pay per request in USDC, no account or API key - built for AI agents. All methods including eth_getLogs, eth_call, trace, and debug (archive) - good for indexing, event queries, and simulation. Simple calls $0.001; heavy calls priced by compute units. One of the first independent x402 RPC providers for this chain.$0.001 Base1509 ms3 payers100% up
  88. 90rpc.nodeflare.app/eth/x402Ethereum RPC (chain 1): JSON-RPC over HTTPS on NodeFlare's own bare-metal nodes. Pay per request in USDC, no account or API key - built for AI agents. All methods including eth_getLogs, eth_call, trace, and debug (archive) - good for indexing, event queries, and simulation. Simple calls $0.001; heavy calls priced by compute units.$0.001 Base1465 ms3 payers100% up
  89. 90api.cueframe.ai/v1/composition/validateValidate a composition body without saving it (dry-run)$0.01 Base2648 ms3 payers100% up
  90. 90xcatcher.top/api/v1/x402/crawlRetrieve recent public X/Twitter posts from one or more named public account handles for monitoring, comparison, OSINT, social intelligence, and source-linked summaries. Returns an asynchronous task with scoped polling access; it does not search X-wide keywords, access private accounts, or control an X account.$0.01 Base1856 ms3 payers100% up
  91. 90x402.dailyelo.com/v1/rpc/healthWhich Base public RPCs serve a stale chain tip. Every 30s we ask all major public RPCs for eth_blockNumber in parallel and record how many blocks behind the fastest peer each was, plus latency and error rate. An RPC never reports its own lag, so an agent reading a balance from a lagging endpoint cannot tell. Omit ?rpc for the full map; ?rpc=<host> for one.$0.01 Base1027 ms3 payers100% up
  92. 90x402-mcp.onrender.com/us/mn/property-checkMinneapolis rental license check: is this property licensed? Property due diligence agent path for Minneapolis Minnesota (Hennepin) housing compliance open data. GET ?address= → rental license status/tier/units/expiration, violation history, condemned/boarded, compliance_verdict. Tenant screening, landlord DD, lending. Live City JSON. US network alias of /mn/property-check.$0.01 Base1257 ms3 payers100% up
  93. 90x402-mcp.onrender.com/mn/property-checkMinneapolis rental license check — is this property licensed? Property due diligence agent for Minneapolis Minnesota (Hennepin) housing compliance open data. GET ?address= (street 1-120 chars) → compliance_verdict (licensed_clean|licensed_with_violations|unlicensed|condemned_or_boarded), rental license status/tier/units/expiration, violation cases, condemned/boarded. Live City JSON. Tenant screening, landlord DD, lending. Sample: /mn/property-check/sample.$0.01 Base1214 ms3 payers100% up
  94. 90api.aidress.ai/pay/agent_edgar_apitoll_cloudLatest SEC EDGAR filings for any US-listed company by stock ticker or CIK: 10-K annual reports, 10-Q quarterly reports, and 8-K material events. Resolves ticker to CIK via SEC's official index and returns the parsed filing (company, form type, dated items). Sourced live from data.sec.gov.$0.003 Base1649 ms3 payers100% up
  95. 90embed.gedx402.com/v1/rerankRerank documents against a query with BGE Reranker Base (@cf/baai/bge-reranker-base). POST query plus documents[]; returns relevance scores for search and RAG pipelines.$0.0023 Base1145 ms3 payers100% up
  96. 90agents.samedaydesk.com/defi/morpho-positionBase address -> deterministic Morpho borrower position snapshot and collateral-price stress scenarios. Returns LTV, LLTV, health factor, liquidation headroom, source freshness, and scenario outcomes. Read-only indexed observation; direct RPC verification is required before execution.$0.02 Base1196 ms3 payers100% up
  97. 90x402-hono-api.inraby.workers.dev/api/v1/secret-scanSecret scan for exposed API keys, tokens, passwords, and credentials in text — returns redacted output without exposing matched secret values. Ideal for agent pre-flight checks before sharing config or logs.$0.01 Base1024 ms3 payers100% up
  98. 90byfaro.ai/agent/check/pricingSingle-signal check: is this website's pricing machine-readable for AI agents? Detects Offer schema with price/availability and pricing-transparency signals. Returns yes/no plus underlying checks and fixes. Useful for procurement and comparison agents.$0.01 Base1121 ms3 payers100% up
  99. 90chain.cyberwarex.com/gasLive gas market on any major EVM chain: current gas price, base fee and priority-fee percentiles (p25/p50/p75) in gwei, plus the estimated cost in native token and USD for a plain transfer (21k gas) and a typical DEX swap (200k gas). Lets an agent decide whether a transaction is worth sending right now or should wait for cheaper gas, and budget the fee before signing.$0.002 Base1404 ms3 payers100% up
  100. 90toolsmith-api.dassad10.workers.dev/t/crypto/gasCurrent gas price and latest block for Base or Ethereum mainnet, straight from public RPC. Fresh within 15 seconds. JSON response. $0.002 USDC per call, pay via x402, no API key.$0.002 Base1577 ms3 payers100% up