x402watch

52,644 paid endpoints are listed. 27,290 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 2026-10-09 06:29 UTC · 52,644 probed

27,290 answering 40220,119 down4,243 rejecting992 no paywall1,829 price drift
  1. 88signal.quickai.build/signalQuick Signal TA v3.1.0 — Crypto technical analysis. Ten indicators with natural-language assessments. Query params: token (required), timeframe, bollinger_period, rsi_period.$0.05 Base1108 ms2 payers97% up
  2. 88agent-arcade.use.x402atlas.com/twenty-four/checkTwenty-Four answer check — verifies a 24-game arithmetic expression with exact rational math against the deterministic daily challenge.$0.005 Base1267 ms2 payers97% up
  3. 88agente.revenuerecoveryai.app/v1/x402/evidence-crosscheckIndependent second opinion on an x402 resource: compares the seller's Bazaar listing and x402 manifest against the live observed price, payTo, network, method and paywall. Field-level evidence with source, timestamp and hash, plus a signed receipt. / Segunda opinión independiente sobre un recurso x402: compara la ficha pública del Bazaar y el manifiesto x402 del vendedor con el precio, destino, red, método y muro de pago observados en vivo. Evidencia por campo con fuente y recibo firmado.$0.01 Base1174 ms2 payers97% up
  4. 88chain-tools.use.x402atlas.com/merkle/buildKeccak Merkle tree and proof builder — generate indexed sorted-pair inclusion proofs with domain separation and explicit odd-node promotion.$0.01 Base1004 ms2 payers97% up
  5. 88jobs.use.x402atlas.com/searchJob search — find current openings by role, skill or company with location, salary, schedule, qualifications and direct application links.$0.05 Base1073 ms2 payers97% up
  6. 88conc-exe.xyz/api/concierge-security-headersPassive HTTP security header review for an authorized external target (no exploitation; platform hosts blocked)$0.02 Base1537 ms2 payers97% up
  7. 88agent-paycheck.onrender.com/v1/checkPre-payment risk and usefulness check for AI agents deciding whether to pay an x402 endpoint.$0.002 Base1163 ms2 payers97% up
  8. 88lionx402.com/api/x402/lei-lookup-jsonGLEIF LEI lookup for AI agents — Legal Entity Identifier search by LEI code, legal name, or domain. Keyless Global LEI Index Golden Copy (api.gleif.org), no API key. LEI, jurisdiction, registration status, LOU. Ed25519-attested. $0.005 Base USDC x402. Matches: LEI, GLEIF, legal entity identifier, LEI lookup, company LEI.$0.005 Base1252 ms2 payers97% up
  9. 88app.tenna.ai/api/x402/lumi/launch_digestLaunch Evidence Digest. Descriptive digest of token launches observed in a time window: count, median terminal multiple, share that ended below -70%/-90%, and the launchpads involved. Facts already observed on chain — not a forecast and not a trading signal.$0.01 Base1128 ms2 payers97% up
  10. 88vedetta.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 Base1317 ms2 payers97% up
  11. 88tripadvisor.x402.paysponge.com/api/v1/location/nearby_searchService: Tripadvisor (https://tripadvisor.x402.paysponge.com/api/v1/location/nearby_search)$0.01 Base1284 ms2 payers97% up
  12. 88flat-rate-llm.kikoribera03.workers.dev/v1/evm/receiptReceipt of a transaction: whether it succeeded or reverted, gas used, fee actually paid, and how many logs it emitted. The call that answers did my transaction work. Via eth_getTransactionReceipt.$0.005 Base291 ms2 payers80% up
  13. 88api.melvea.com/v1/catalogStructured varietal data and verifiable research provenance for 150+ honey varieties, including the obscure long tail foundation models get wrong. Every compositional datum resolves to a real, published source (DOI/PMID). Per variety: color grade (USDA Pfund band with measured or estimated source), intensity, flavor profile, texture, use cases, best-for pairing tags, primary and secondary countries, and a citation_count pointing to the paid citations endpoint. Melvea IP only.$0.05 Base1309 ms2 payers97% up
  14. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-onchain-deepUse when an agent needs the top x402 services tagged 'onchain-deep'. Returns Deep view: top 100 x402 services tagged 'onchain': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 170 providers and 245 paying wallets measured in this tag.$0.02 Base1267 ms2 payers97% up
  15. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-tradingHighest-demand x402 services tagged 'trading': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 160 providers and 311 paying wallets measured in this tag.$0.008 Base1092 ms2 payers97% up
  16. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-usdcHighest-demand x402 services tagged 'usdc': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 88 providers and 284 paying wallets measured in this tag.$0.008 Base1224 ms2 payers97% up
  17. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-weatherHighest-demand x402 services tagged 'weather': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 133 providers and 232 paying wallets measured in this tag.$0.008 Base1037 ms2 payers97% up
  18. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-verificationUse when an agent needs the top x402 services tagged 'verification'. Returns Highest-demand x402 services tagged 'verification': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 181 providers and 258 paying wallets measured in this tag.$0.008 Base1271 ms2 payers97% up
  19. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-webHighest-demand x402 services tagged 'web': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 183 providers and 463 paying wallets measured in this tag.$0.008 Base1323 ms2 payers97% up
  20. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-seoHighest-demand x402 services tagged 'seo': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 129 providers and 217 paying wallets measured in this tag.$0.008 Base1298 ms2 payers97% up
  21. 88flat-rate-llm.kikoribera03.workers.dev/v1/content/horror-storyOne two-sentence horror story, in English or Spanish, by theme: domestic, technological, cosmic or folk. Returned SPLIT into setup and payoff as well as joined, so a narrating agent can deliver the first line, pause, and then land the second. Takes parameters, returns an id to avoid repeats, and accepts a seed for a reproducible answer.$0.005 Base115 ms2 payers80% up
  22. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-securityHighest-demand x402 services tagged 'security': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 132 providers and 213 paying wallets measured in this tag.$0.008 Base1399 ms2 payers97% up
  23. 88tanod.dev/v1/chain/pricechainpeek (Tanod) token price: the latest answer of a Chainlink on-chain price feed (not a DEX spot price) for a fixed pair list (ETH/USD, BTC/USD, USDC/USD, USDT/USD, DAI/USD, LINK/USD, cbETH/ETH on both chains; stETH/USD on Ethereum only; cbETH/USD on Base only), with round, update time and a staleness flag against the feed's heartbeat. Read-only.$0.002 Base286 ms2 payers80% up
  24. 88tanod.dev/v1/ocrsitepeek (Tanod) OCR: the text of a public PNG, JPEG, WebP, GIF or TIFF image (tesseract), with word count and mean word confidence, run in an isolated, resource-limited process. Read-only.$0.01 Base260 ms2 payers80% up
  25. 88x402.agentutility.ai/weather-current-cityReturns current weather for any city or place name, no coordinates needed.$0.01 Base36 ms2 payers80% up
  26. 88api.dripmetrics.ai/metrics/vwap-deviationDripMetricsAI (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. VWAP Deviation measures the latest price deviation from the window VWAP. Discovery examples use the latest 30m window.$0.05 Base1345 ms2 payers97% up
  27. 88api.you.com/v1/finance_researchYou.com Finance Research API: agentic deep research on a financial question, returning a synthesized answer with cited sources. Use when an agent needs well-reasoned market or company analysis for a trading or investment decision. JSON body: input (required question), research_effort (standard | deep | exhaustive, default deep). Paid per call in USDC. Async: paying returns a jobId; poll the SIWX-authed poll_url for the result (deep research takes 1-3 min).$0.11 Base1566 ms2 payers97% up
  28. 88chain.openverbs.com/v1/tokenLive ERC-20 metadata read directly from the contract: name, symbol, decimals and total supply (raw + decimal-formatted). Handles both string and legacy bytes32 name/symbol encodings. Returns `isToken:false` for EOAs or non-token contracts. Reads live on-chain data with automatic endpoint fallback.$0.002 Base556 ms2 payers93% up
  29. 88chain.openverbs.com/v1/token-balanceLive ERC-20 token balance held by a wallet: calls `balanceOf(address)` on the token contract and returns the raw balance plus a decimal-formatted amount (using the token's own decimals) with its symbol. Distinct from `address` (native ETH balance) and `token` (contract metadata). Reads live on-chain data with automatic endpoint fallback.$0.002 Base557 ms2 payers93% up
  30. 88soren.com/v1/chain/txRead a transaction by hash: from, to, value, block, or found:false, live from Base mainnet, for a fraction of a cent. No API key, no account — a wallet is the only requirement, and you are charged only if the read succeeds. Plain unsigned data; the attested version of chain reads is /v1/oracle/onchain. Answers are read at the moment of the call and stamped with the block they came from where applicable.$0.003 Base1724 ms2 payers97% up
  31. 88jtifhcvbgxqwlywugvjv.supabase.co/functions/v1/cortex402-wallet-balanceCheck any wallet balance across 5 EVM chains. Returns native or ERC-20 balance with threshold check, block height, and on-chain receipt. Supports Base, Ethereum, Arbitrum, Optimism, and Polygon.$0.02 Base2777 ms2 payers97% up
  32. 88numtheory.openverbs.com/v1/factorizePrime-factorize a positive integer (≤ 10^15 so the computation is always fast). Returns the prime factors with exponents, the divisor count, and whether n is prime.$0.004 Base499 ms2 payers93% up
  33. 88web.openverbs.com/v1/sitemapDiscover a site's XML sitemaps (via robots.txt Sitemap: directives, an explicit sitemap URL, or the conventional /sitemap.xml) and parse them into a bounded list of URLs with their lastmod, changefreq and priority. Follows sitemap-index files to their child sitemaps. Fetches and URL counts are capped (with a `truncated` flag) to stay fast and memory-bounded. The reliable way for an agent to enumerate a site's pages.$0.006 Base304 ms2 payers93% up
  34. 88geometry.openverbs.com/v1/distanceEuclidean, Manhattan and Chebyshev distance between two 2-D points.$0.004 Base498 ms2 payers93% up
  35. 88otp.openverbs.com/v1/uriBuild an otpauth:// provisioning URI (the string encoded in authenticator QR codes) for a totp or hotp secret. Includes label, issuer, algorithm, digits and period (totp) or counter (hotp). The secret must be valid base32.$0.004 Base439 ms2 payers93% up
  36. 88jsonschema.openverbs.com/v1/inferInfer a JSON Schema (draft-07) from an example value, walking objects and arrays recursively. Set detectFormat=true to tag strings that look like date-time/date/email/uri/uuid, requireAll=false to leave object properties optional, and additionalProperties=true to allow extra keys.$0.004 Base467 ms2 payers93% up
  37. 88email.openverbs.com/v1/validateValidate an email address — syntax, MX/A deliverability lookup, and disposable / role-based address detection. No mailbox probing.$0.006 Base424 ms2 payers93% up
  38. 88api.locus.report/api/locus-wildfire-riskFEMA National Risk Index wildfire rating and score for the census tract at an address, for buyer, owner and lender agents. Returns the same records as locus_wildfire_risk. Use this when your client can only call paid x402 routes. Use locus_wildfire_risk instead when you can call Locus free tools (REST tools/call or MCP).$0.01 Base1682 ms2 payers97% up
  39. 88api.locus.report/api/locus-rental-registration-checkExact-building registration, license, or enforcement status. Returns the same records as locus_rental_registration_check. Use this when your client can only call paid x402 routes. Use locus_rental_registration_check instead when you can call Locus free tools (REST tools/call or MCP).$0.01 Base1698 ms2 payers97% up
  40. 88mime.openverbs.com/v1/extensionResolve a MIME type to its default file extension.$0.002 Base325 ms2 payers93% up
  41. 88agentworld.me/api/agentworld/agents/rankedAgentWorld Agent Leaderboard - top AI agents ranked by USDC wealth or reputation score. Includes job role, city, mood, personality archetype. Updated every 3 minutes by the tick engine. Filter by city or job.$0.001 Base590 ms2 payers93% up
  42. 88www.pennypress.org/essays/river-of-time$0.01 Base478 ms2 payers100% up
  43. 88www.pennypress.org/essays/untamed-wilderness$0.01 Base410 ms2 payers100% up
  44. 88www.pennypress.org/essays/thermodynamic-proof$0.01 Base427 ms2 payers100% up
  45. 88www.pennypress.org/essays/confidence-game$0.01 Base586 ms2 payers100% up
  46. 88www.pennypress.org/essays/calculus$0.01 Base524 ms2 payers100% up
  47. 88grok.x402.paywithlocus.com/grok/modelsLocus public pay-per-use API$0.001 Base413 ms2 payers93% up
  48. 88x402.openwebninja.com/realtime-news-data/top-headlines$0.003 Base345 ms2 payers100% up
  49. 88stationfx.com/query/:idFunction marketplace for AI agents. Browse economic data, computed signals, and deterministic functions across 12 categories. Pay per call in USDC on Base via x402. No API keys, no subscriptions. Search the catalog free at /discover/search, inspect before buying at /discover/{listing_id}, pay only to query.$0.008 Base1112 ms1 payers97% up
  50. 88agents.dyoeway.org/merchantIs this online store safe to buy from? Scam/fraud check + trust verdict (safe/caution/avoid) + store signals (checkout, returns, payment methods) — counterparty trust for shopping & commerce agents before they pay. Input: ?url=$0.05 Base451 ms1 payers93% up
  51. 88x402-echo-service.onrender.com/timeServer time in several formats at once. POST {} and receive the current UTC instant as ISO-8601, unix seconds, unix milliseconds and RFC-2822. Useful for agents that need an authoritative clock they did not compute themselves.$0.001 Base101 ms1 payers80% up
  52. 88api-onchain.optimai.network/external/v1/x402/searchOptimAI Search: an agent-ready decentralized search API powered by OptimAI Network nodes. Ask a natural-language question and get real-time, citation-backed search results across web, social, and crypto data.$0.001 Base1146 ms1 payers97% up
  53. 88regionfetch.dev/api/fetchRetrieve a public HTTPS URL from the US, Germany, Japan, Brazil, or India. Use HTTP mode for lightweight retrieval, or browser mode to render JavaScript pages. For pages with bot protection, set max_tier to L2 for managed unblocking at $0.05 USDC; L0/L1 costs $0.02 USDC. Returns the fetched body and an Ed25519-signed receipt for provenance.$0.02 Base1420 ms1 payers97% up
  54. 88farouter.tech/v1/messages[OI]-compatible LLM inference API for autonomous agents. Supports reasoning, coding and chat workloads. Pay with USDC on Base using x402 (upto scheme, true-up billing): the 402 quotes a spending CAP (estimated input tokens + your max_tokens at the model's per-1M price), and after the model answers you are settled for the ACTUAL usage — always <= the cap, never more. Minimum $0.001, cap $3.0 per call. Cached input bills at 10%. Failed calls are never charged. Any model from GET /v1/models.$0.001 Base2887 ms1 payers97% up
  55. 88farouter.tech/v1/models/glm-5.3-flash/chat/completionsFixed-price chat completions for glm-5.3-flash on FarOut: flat $0.002 per call (includes up to 4,000 input + 1,000 output tokens). Rate: $0.008/1M input tokens, $0.028/1M output tokens. Pay with USDC on Base using x402. No API key, no account, no prepaid balance.$0.002 Base1301 ms1 payers97% up
  56. 88farouter.tech/v1/models/glm-5.2/chat/completionsFixed-price chat completions for glm-5.2 on FarOut: flat $0.002 per call (includes up to 4,000 input + 1,000 output tokens). Rate: $0.011/1M input tokens, $0.035/1M output tokens. Pay with USDC on Base using x402. No API key, no account, no prepaid balance.$0.002 Base1587 ms1 payers97% up
  57. 88farouter.tech/v1/models/deepseek-v4-pro/chat/completionsFixed-price chat completions for deepseek-v4-pro on FarOut: flat $0.002 per call (includes up to 4,000 input + 1,000 output tokens). Rate: $0.037/1M input tokens, $0.111/1M output tokens. Pay with USDC on Base using x402. No API key, no account, no prepaid balance.$0.002 Base1328 ms1 payers97% up
  58. 88intel.twzrd.xyz/v1/intel/trust/:solana_addressPre-payment guard for x402 agents: free POST /v1/intel/preflight before spending, paid signed V7 trust receipt after. Evaluate any counterparty BEFORE paying — 0.05 USDC buys the proof (Solana mainnet). POST /v1/intel/preflight is free, no auth.$0.05 Solana1347 ms1 payers97% up
  59. 88www.blockchainiq.co/api/x402/v1/macroUS macroeconomic indicators in one call: real GDP growth, CPI inflation, core PCE, unemployment rate, nonfarm payrolls, Fed funds rate, 2-year and 10-year Treasury yields, Japan 10-year yield, WTI crude oil, gold and silver. Each with latest value, prior value and as-of date. Use for the macro backdrop to crypto and risk assets. Sourced from FRED and futures data. JSON, no API key. $0.02 per call. Blockchain IQ.$0.02 Base398 ms1 payers88% up
  60. 88pyfile-agent.taile3ff35.ts.net/web/searchWeb search: ranked results (title + url) for a query. ?q=x402+agent+payments&limit=8$0.003 Base903 ms1 payers93% up
  61. 88flat-rate-llm.kikoribera03.workers.dev/v2/inferenciaLLM inference at a flat $1.00 per call, with no account, no API key and no token metering. POST a prompt, get the completion: the same price for 10 tokens or 4000, while metered gateways scale with usage. Automatic failover across several large models; typical response under 1s. Pay per call in USDC over x402 - nothing to sign up for.$1.00 Base181 ms1 payers80% up
  62. 88api.macaroonnetwork.com/execute/uk-logistics-operator-risk-check-v1Search DVSA's real, live UK Vehicle Operator Licensing register -- every goods vehicle and PSV operator licence in Great Britain (69,127 operators, updated weekly) -- for a haulier or logistics operator by name. Returns licence status, authorised fleet size, and cross-references the operator's real Companies House status to flag a rare but real risk: a licence that still reads valid while the operator's actual registered company is dissolved or in liquidation.$0.005 Base1601 ms1 payers97% up
  63. 88api.macaroonnetwork.com/execute/polymathica-research-paper-search-v1Find source-linked scientific papers by topic. Returns metadata pointers, authors, dates, licence evidence when supplied by the source, and corpus provenance; it does not sell paper text or infer reuse rights.$0.001 Base1603 ms1 payers97% up
  64. 88api.x402.fernhub.co.nz/roadsLive NZ road events (closures, delays, roadworks) along a driving route or around a named road, pass or place, with plain-English location, delay minutes, map links, route distance, drive time and a Google Maps directions link. Understands landmarks and passes (Desert Road, Arthur's Pass, Milford Road), 'A to B', 'A via X to B'. Free /resolve shows how your input is read before you pay.$0.005 Base Sepolia375 ms1 payers89% up
  65. 88x402.agentutility.ai/tweets-searchRepeat a saved X/Twitter search query to monitor a brand, topic, or phrase over time. Send the same query, language, and max_results on each check; it returns recent public post text, timestamps, metrics, and expanded author profiles. It uses read-only X API v2, excludes retweets by default, and translates legacy since:, until:, and -filter:retweets syntax. If X cannot answer, the tweets array contains clearly labeled public-index results with degraded: true rather than an empty successful response. No account mutation. Use it as a tweets search API, Twitter monitor, saved-query watchlist, or X recent post search.$0.006 Base256 ms1 payers80% up
  66. 88x402.agentutility.ai/twitter-searchRepeat a saved X/Twitter search query to monitor a brand, topic, or phrase over time. Send the same query, language, and max_results on each check; it returns recent public post text, timestamps, metrics, and expanded author profiles. Legacy Twitter search operators such as since:, until:, and -filter:retweets are normalized before the read-only X API v2 call. If X access is unavailable, the same tweets array returns clearly labeled public-index results with degraded status instead of an empty paid response. Use it as a Twitter search API, saved-query monitor, X recent-post search, or public-post watchlist.$0.006 Base142 ms1 payers80% up
  67. 88api.magentlab.com/api/calc/burch_wartofskyBurch 1993 points: °F (<99→0, 99.0–99.9→5, 100.0–100.9→10, 101.0–101.9→15, 102.0–102.9→20, 103.0–103.9→25, ≥104→30); CNS 0/10/20/30; GI-hepatic 0/10/20; HR (<90→0, 90–109→5, 110–119→10, 120–129→15, 130–139→20, ≥140→25); HF 0/5/10/15; AF 10; precipitant 10. Max 140. <25 unlikely, 25–44 impending, ≥45 highly suggestive. temperature_f or temperature_c, not both. Not a diagnosis or ICU order. magent does not measure temperature or an ECG.$0.005 Base1253 ms1 payers97% up
  68. 88api.magentlab.com/api/calc/rapidRahman 2014 RAPID score for pleural infection: urea (<5=0, 5-8=1, >8=2 mmol/L), age (<50=0, 50-70=1, >70=2), non-purulent fluid 1, hospital-acquired 1, albumin <27 g/L 1; total 0-7 with low/medium/high bands. Deterministic published arithmetic with citation; not a drain or surgery decision and not Light's criteria.$0.005 Base1085 ms1 payers97% up
  69. 88api.magentlab.com/api/calc/aap_pediatric_bpAAP 2017 Flynn Table 3 pediatric BP category (normal, elevated, stage_1, stage_2) from age 1-17 and cuff mm Hg. Age ≥13 uses adult-aligned 120/80, 130/80, and 140/90 cutoffs. Age 1-12 needs caller 90th/95th mm Hg (magent does not interpolate height/sex tables). Category is the more severe limb. magent does not measure BP. Not a device, not a hypertension diagnosis, not the 2004 Fourth Report, and not ACC/AHA 2017 for age <13.$0.005 Base1099 ms1 payers97% up
  70. 88route-a-worker.frostskynet-api.workers.dev/formatConverts JSONL rows to JSONL, chat training examples or Markdown. Returns the serialized result as an output string with stats. No AI.$0.005 Base Sepolia338 ms1 payers89% up
  71. 88timecapsule.0000402.xyz/sealPay $0.05 USDC to seal up to 100 KB of text until a future date. Content is inaccessible via GET /open/{token} until unlock_at passes. An optional label is visible before unlock via GET /status/{token}. Max unlock date: 10 years from now. Network: Base Mainnet. Each request stores one sealed text capsule and returns a token for later retrieval.$0.05 Base1428 ms1 payers97% up
  72. 88market.datapackvibe.com/x402/faction-briefsFaction brief generator: Create a playable faction with a public aim, hidden need, and rival.$0.02 Base205 ms1 payers80% up
  73. 88random.openverbs.com/v1/sampleDraw a random sample from a provided array — without replacement by default (a fair shuffle), or with replacement when unique is false. count defaults to 1.$0.002 Base512 ms1 payers93% up
  74. 88hash.openverbs.com/v1/hashCompute a cryptographic digest (SHA-2, SHA-3, BLAKE2, and legacy SHA-1/MD5/RIPEMD-160) of some data. The input may be utf8/hex/base64/base64url and the digest is returned as hex/base64/base64url.$0.002 Base713 ms1 payers93% up
  75. 88numtheory.openverbs.com/v1/totientEuler's totient φ(n) — the count of integers in [1, n] coprime to n — for a positive integer ≤ 10^15 (it is computed from the prime factorization).$0.004 Base336 ms1 payers93% up
  76. 88iban.openverbs.com/v1/validateValidate an IBAN (mod-97 checksum, length, country format) and decompose it into country, bank, branch and account parts.$0.004 Base522 ms1 payers93% up
  77. 88geometry.openverbs.com/v1/triangleArea (Heron's formula), perimeter and interior angles of a triangle from its three side lengths. Sides that violate the triangle inequality are rejected as a clean 400.$0.004 Base521 ms1 payers93% up
  78. 88geometry.openverbs.com/v1/rectangleArea, perimeter and diagonal of a rectangle from its width and height.$0.004 Base509 ms1 payers93% up
  79. 88geometry.openverbs.com/v1/polygonArea (shoelace formula), perimeter and centroid of a simple polygon given its vertices in order. Vertices are treated as a closed ring (last connects to first).$0.004 Base531 ms1 payers93% up
  80. 88distribution.openverbs.com/v1/poissonPoisson distribution with rate `lambda` (> 0, ≤ 1e9). `function` selects the mass (pmf), cumulative distribution (cdf) or quantile / inverse-CDF.$0.004 Base485 ms1 payers93% up
  81. 88combinatorics.openverbs.com/v1/permutationsNumber of ordered arrangements of r items from n, nPr = n!/(n-r)!. Requires r ≤ n and r ≤ 10000.$0.004 Base438 ms1 payers93% up
  82. 88combinatorics.openverbs.com/v1/multinomialMultinomial coefficient (k1+k2+…)! / (k1! k2! …) — the number of ways to partition n = Σki items into labelled groups of the given sizes. The sum must be ≤ 20000.$0.004 Base434 ms1 payers93% up
  83. 88combinatorics.openverbs.com/v1/factorialExact factorial n! for 0 ≤ n ≤ 20000, returned as a decimal string with its digit count.$0.004 Base436 ms1 payers93% up
  84. 88astro.openverbs.com/v1/seasonDetermine the astronomical season for a date, based on the Sun's apparent ecliptic longitude (0°=March equinox, 90°=June solstice, …). Defaults to the northern hemisphere; pass `hemisphere` to flip.$0.004 Base416 ms1 payers93% up
  85. 88financial-analyst.ai/amortization/scheduleFull amortization schedule with monthly payment breakdown, interest-only periods, and payoff date. Supports fixed-rate, bridge, and interest-only loan structures.$0.25 Base2876 ms1 payers97% up
  86. 88api.usenami.io/v1/perp/funding-spreadCross-venue funding-rate spread for one crypto perpetual — the highest- and lowest-paying venues and the spread in bps, across major CEX and DEX venues (Binance, Bybit, OKX, Hyperliquid …). `spread_bps` is the RAW rate difference, the same quantity and name as on `/v1/perp/arbitrage/funding`; `normalized_spread_8h_bps` scales both legs to 8h, the comparable one, since venues quote on 1h/4h/8h. Leg intervals ship with the row; normalized is null when a schedule is unknown, never defaulted.$0.001 Base1456 ms1 payers97% up
  87. 88api.usenami.io/v1/perp/basisPer-venue basis for one crypto perpetual — mark versus index price, basis_bps = (mark−index)/index×10000, and contango/backwardation structure, across tracked CEX and DEX venues. Every venue has an index except Crypto.com, Variational and dYdX; dYdX publishes one oracle price, which is its mark. `venues_without_index` names the ones missing. Each venue also carries liquidity_state (live/dead/unknown), and a market with no trading is flagged unreliable however clean its basis looks.$0.005 Base1478 ms1 payers97% up
  88. 88api.usenami.io/v1/perp/vw-spreadVolume-weighted average funding rate across all tracked venues for one crypto perpetual. Accounts for venue market share — high-volume venues dominate the weighted rate, so it reflects what the market actually pays rather than a flat average across thin and deep venues alike.$0.003 Base1424 ms1 payers97% up
  89. 88api.usenami.io/v1/perp/funding-flipsFunding-rate sign-change detection for one crypto perpetual — every positive↔negative flip across venues inside a lookback window, each with its venue, hour and the rates either side of the change. Raw events for spotting funding-regime turns in funding-arb and carry positioning: it reports the flips, it does not classify them as sustained or transient.$0.003 Base1610 ms1 payers97% up
  90. 88api.usenami.io/v1/perp/carryPer-venue funding carry for one crypto perpetual: raw funding_rate, annualized_carry_pct, and contango/backwardation structure from the funding sign. What holding this perp pays or costs you per year, venue by venue, across tracked CEX and DEX venues.$0.005 Base1603 ms1 payers97% up
  91. 88api.usenami.io/v1/perp/volume-historyHistorical 24h-volume timeseries for one crypto perpetual on one venue, aggregated 1h/4h/1d — liquidity over time for backtests and venue selection. 30–90d window cap.$0.005 Base1572 ms1 payers97% up
  92. 88api.usenami.io/v1/perp/volume-24h24-hour rolling USD volume for one crypto perpetual on one venue — liquidity and activity ranking across tracked CEX and DEX perp venues.$0.001 Base1450 ms1 payers97% up
  93. 88api.usenami.io/v1/rwa/perp-coverageReal-world-asset (RWA) perpetual coverage across HIP-3 DEXes — which stocks, metals, forex pairs, commodities and pre-IPO synthetics are listed as perps, and on which venue. Tracks the on-chain RWA perp surface as it expands beyond crypto.$0.001 Base1476 ms1 payers97% up
  94. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-verdict-deepDeep view: top 100 x402 services tagged 'verdict': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 10 providers and 2536 paying wallets measured in this tag.$0.02 Base1552 ms1 payers97% up
  95. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-token-deepDeep view: top 100 x402 services tagged 'token': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 86 providers and 2660 paying wallets measured in this tag.$0.04 Base1338 ms1 payers97% up
  96. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-crypto-deepDeep view: top 100 x402 services tagged 'crypto': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 860 providers and 2031 paying wallets measured in this tag.$0.02 Base1383 ms1 payers97% up
  97. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-perpetualsHighest-demand x402 services tagged 'perpetuals': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 48 providers and 101 paying wallets measured in this tag.$0.032 Base1300 ms1 payers97% up
  98. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-on-chain-deepDeep view: top 100 x402 services tagged 'on-chain': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 85 providers and 315 paying wallets measured in this tag.$0.02 Base1382 ms1 payers97% up
  99. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-funding-rateHighest-demand x402 services tagged 'funding-rate': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 27 providers and 78 paying wallets measured in this tag.$0.032 Base1451 ms1 payers97% up
  100. 88x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-evidence-deepDeep view: top 100 x402 services tagged 'evidence': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 553 providers and 574 paying wallets measured in this tag.$0.04 Base1246 ms1 payers97% up