x402watch

53,113 paid endpoints are listed. 31,940 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 2026-10-05 15:08 UTC · 53,113 probed

31,940 answering 40215,003 down5,345 rejecting825 no paywall1,219 price drift
  1. 90api.hergertsynthora.com/v1/air-qualitySYNTHORA air-quality: live air quality for any city or lat,lon — PM2.5/PM10/ozone/NO2, EU and US AQI, and a WHO-threshold operational verdict (good/moderate/harmful). Source: open-meteo Air Quality (CAMS/ESA Copernicus), free, no key. $0.005 USDC x402 Base.$0.01 Base1078 ms5 payers100% up
  2. 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 Base1156 ms5 payers100% up
  3. 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 Base888 ms5 payers97% up
  4. 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 Base1567 ms5 payers100% 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. 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 Base761 ms5 payers97% up
  7. 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 Base2074 ms5 payers100% up
  8. 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
  9. 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
  10. 90api2ls.com/api/gasGet live EVM gas pricing with EIP-1559 breakdown and USD cost estimates$0.01 Base2178 ms5 payers100% up
  11. 90api.xona-agent.com/base-main/audio/x-text-to-speechElevenLabs text-to-speech: convert text to speech (MP3) (Base Mainnet).$0.01 Base2074 ms5 payers100% up
  12. 90api.lastlookdata.com/api/treasury/currentLastLook Data — current 30-year US Treasury yield (DGS30). Alias for /api/current?id=DGS30.$0.01 Base1570 ms5 payers100% up
  13. 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 Base1040 ms5 payers100% up
  14. 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 Base1064 ms5 payers100% up
  15. 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 ms5 payers100% up
  16. 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 Base1009 ms5 payers100% up
  17. 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 Base1003 ms5 payers100% up
  18. 90finance-api.kdlcfa.workers.dev/eth-priceEthereum (ETH-USD) spot price, delayed, via Yahoo Finance$0.01 Base1372 ms5 payers100% up
  19. 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 Base2297 ms5 payers100% up
  20. 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 Base1597 ms4 payers100% up
  21. 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 Base2043 ms4 payers100% up
  22. 90twitter.use.x402atlas.com/community-detailsGet complete public information for an X community.$0.006 Base1099 ms4 payers100% up
  23. 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 Base1381 ms4 payers100% up
  24. 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 Base1256 ms4 payers100% up
  25. 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 Base1533 ms4 payers100% up
  26. 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
  27. 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
  28. 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 Base1443 ms4 payers100% up
  29. 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
  30. 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
  31. 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 Base1041 ms4 payers100% up
  32. 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
  33. 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
  34. 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
  35. 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 Base1907 ms4 payers100% up
  36. 90www.moltbillboard.com/api/x402/placementsBrowse live MoltBillboard placements — machine-readable offer surfaces, trust signals, and attribution primitives for agentic commerce.$0.001 Base1606 ms4 payers100% up
  37. 90trade.chainverdict.xyz/v1/gtin/prefixResolve a GTIN/EAN prefix to its GS1 Member Organisation (not country of origin).$0.004 Base1180 ms4 payers100% up
  38. 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
  39. 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 Base1457 ms4 payers100% up
  40. 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
  41. 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 Base1161 ms4 payers100% up
  42. 90api.stackgoai.com/api/v1/extract-contactExtract structured public business contact information from any public business website. Returns company name, emails, phone numbers, social profiles, postal addresses, and contact pages as structured JSON. $0.01 per request via x402 on Base.$0.01 Base1376 ms4 payers100% up
  43. 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 ms4 payers100% up
  44. 90stocks.cyberwarex.com/fundamentalsKey annual fundamentals for a US ticker from SEC XBRL$0.004 Base1039 ms4 payers100% up
  45. 90api.onhub.ai/v1/chat/completionsText completion using the model selected in the request body.$0.002 Base1138 ms4 payers100% up
  46. 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
  47. 90preflight.openverbs.com/v1/inspectFetch any URL and, without paying, decode its x402 402 Payment Required challenge: price (atomic and formatted for known stablecoins), asset, network, payTo, resource, description, timeout and any input schema. Flags MPP and Bazaar discovery extensions. Returns free:true when no payment is needed. SSRF-hardened: public hosts only; private, loopback, link-local and cloud-metadata addresses are rejected.$0.006 Base678 ms4 payers97% up
  48. 90matrix.openverbs.com/v1/solveSolve the linear system A·x = b for a square coefficient matrix A and vector b via Gaussian elimination with partial pivoting. A non-square A or a b of the wrong length is a clean 400. A singular system is NOT an error — it returns a successful { solvable:false, solution:null }.$0.004 Base444 ms4 payers97% up
  49. 90foundry-par007-machine-revenue-mainnet.inference-chip-index.workers.dev/v2/official/clinicaltrials-searchFind recently updated ClinicalTrials.gov study identifiers, titles and registry status for a condition, with the registry processing date. No medical conclusion.$0.01 Base1316 ms4 payers100% up
  50. 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 Base820 ms4 payers92% up
  51. 90url2md.io/v1/mdPDFs, JavaScript pages and ordinary HTML as clean Markdown. Pays a page's x402 toll for you. Follows robots.txt.$0.005 Base1132 ms4 payers100% up
  52. 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 Base1642 ms4 payers100% up
  53. 90proxy.suverse.io/v1/data/ethereum-gas-trackerEthereum mainnet gas prices (safe / standard / fast tier) real-time from Etherscan V2. AI agent MEV bot, trading bot, dApp tx-timing API, ETH gas oracle, pay-per-call. Time transactions for cost efficiency.$0.05 Base1404 ms4 payers100% up
  54. 90palmyr.ai/x/accounts/mineList X accounts your wallet owns or has shared access to (returns full credentials).$0.01 Solana1343 ms3 payers100% up
  55. 90glim.sh/api/v1/telegram/searchSearch Telegram: channel discovery by topic plus indexed public posts$0.01 Solana1231 ms3 payers100% up
  56. 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 Base1186 ms3 payers100% up
  57. 90onchainpulse.theaslangroupllc.com/api/memecoinHoneypot, rug & token-safety scanner for Solana memecoins — instant pre-trade check of mint/freeze authority, LP lock/burn, holder & dev concentration and insider flags, fused with live liquidity, buy/sell flow and age into one deterministic CLEAR / CAUTION / AVOID verdict for any SPL token. Answers "is this token safe to buy?" in one call — a token safety check / rug pull check for swap guardrails. For Solana trading & sniping agents.$0.015 Base1126 ms3 payers100% up
  58. 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 Base1287 ms3 payers100% up
  59. 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 ms3 payers100% up
  60. 90glim.sh/api/v1/inference/v1/chat/completionsLLM chat completion (OpenAI-compatible, streaming supported)$0.0054 Solana144 ms3 payers83% up
  61. 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
  62. 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 Base1302 ms3 payers100% up
  63. 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 Base1332 ms3 payers100% up
  64. 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 Base1794 ms3 payers100% up
  65. 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 Base1783 ms3 payers100% up
  66. 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 Base1362 ms3 payers100% up
  67. 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 ms3 payers100% up
  68. 90trust-agent.io/v1/reputationWhat is this agent's reputation actually worth? 92.6% of ERC-8004 feedback on Base is coordinated. This clusters reviewers by funding provenance and caps each cluster at one effective vote, returns every record with its evidence class and flag reasons, and refuses to average ratings that use incompatible scales. Free alternative: GET /v1/verify. Trial: 3 free calls/wallet/24h — https://trust-agent.io/v1/trial.$0.002 Base1067 ms3 payers100% up
  69. 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 Base1383 ms3 payers100% up
  70. 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 Base1345 ms3 payers100% up
  71. 90intel.chainquery.com/v1/cddChainQuery Bitcoin Intelligence: independent Bitcoin-native on-chain data over x402, no API key. Coin Days Destroyed (CDD) spike classifier (state normal/elevated/spike/extreme + z-score vs 30-day baseline).$0.01 Base985 ms3 payers97% up
  72. 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 Base1319 ms3 payers100% up
  73. 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 Base1638 ms3 payers100% up
  74. 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 Base1982 ms3 payers100% up
  75. 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 Base1264 ms3 payers100% up
  76. 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 Base1921 ms3 payers100% up
  77. 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 Base1767 ms3 payers100% up
  78. 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
  79. 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 Base1688 ms3 payers100% up
  80. 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 Base1688 ms3 payers100% up
  81. 90api.cueframe.ai/v1/composition/validateValidate a composition body without saving it (dry-run)$0.01 Base2709 ms3 payers100% up
  82. 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 Base1888 ms3 payers100% up
  83. 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 Base1249 ms3 payers100% up
  84. 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 Base1254 ms3 payers100% up
  85. 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 Base1204 ms3 payers100% up
  86. 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 Base1419 ms3 payers100% up
  87. 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 Base1311 ms3 payers100% up
  88. 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 Base1441 ms3 payers100% up
  89. 90api.svgsmith.dev/v1/convertConvert a raster image (PNG, JPEG, or WebP) into clean, editable, self-verified SVG vector art. Pay per conversion in USDC on Base via x402 - no API key, no subscription. Send JSON with imageBase64 or imageUrl; tune with mode (auto/binary/color/pixel), detail (high/normal/clean/poster), transparent or solid background, and outline flags. Returns the SVG plus a quality report (paths, similarity score).$0.02 Base1169 ms3 payers100% up
  90. 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 Base1853 ms3 payers100% up
  91. 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
  92. 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 Base2375 ms3 payers100% up
  93. 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 Base1606 ms3 payers100% up
  94. 90delta.rursus.app/v1/sources/inspectInspect a public JSON, RSS, or Atom URL, detect its record structure, and return a normalizer-verified FreshDelta monitoring configuration with stable IDs, selected fields, confidence, and warnings.$0.01 Base1125 ms3 payers100% up
  95. 90agent-api-production.tim1712.workers.dev/v1/business/eu-vat-checkUse when an agent needs the current official VIES validation status of an EU VAT number before B2B onboarding, invoicing or procurement. Queries the European Commission VIES REST API and returns whether the number is currently valid, plus the registered company name and address when the member state returns them. It does not give tax advice and is not proof a company is legitimate, an invoice is compliant, or a sanctions/KYC/AML check.$0.01 Base1055 ms3 payers100% up
  96. 90x402.tradesnack.com/taMulti-indicator technical analysis (SMA/EMA crosses, Bollinger, RSI, candlestick patterns, support/resistance, trendlines, experimental Elliott Wave) for any crypto pair.$0.01 Base2120 ms3 payers100% up
  97. 90vedetta.dethboy.com/v1/track-recordVerifiable call log: every signal this desk has published, timestamped and countable (?asset=BTC optional). Audit us for a penny before you spend a dime — no accuracy claims, compute your own. Descriptive research, not financial advice.$0.01 Base1709 ms3 payers100% up
  98. 90pro-api.coingecko.com/api/v3/x402/onchain/simple/networks/base/token_price/0x4200000000000000000000000000000000000006,0x940181a94a35a4569e4529a3cdfb74e38fd98631,0x9b5e262cf9bb04869ab40b19af91d2dc85761722Query onchain DEX token price & market data based on the provided token contract addresses on a network.$0.01 Base1269 ms3 payers100% up
  99. 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 ms3 payers100% up
  100. 90codepulse-api.hahavoid0.workers.dev/mailbox/createGenerates a temporary disposable inbox address using the free 1secmail.com service.$0.01 Base1988 ms3 payers100% up