{"id":"e5b8f12f-ee6b-4fb6-8b23-9fb9d68ffad6","shortId":"tru9Nv","kind":"x402","title":"CME market quote data via x402 micropayment on Base, $0.02 per request.","tagline":"CME market quote data via x402 micropayment on Base, $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides CME (Chicago Mercantile Exchange) market quote data behind an x402 paywall. It is part of a broader platform offering data & analytics, AI/ML, finance, and infrastructure APIs, all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/market/quote/CME` accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) via the x402 \"exact\" scheme. The max amount required is 20,000 base units, which at 6 decimals equals $0.02 USD per call. The payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, and the payment timeout is 300 seconds.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the CME quote contains or what parameters the POST body accepts. The endpoint is confirmed live (returns 402 challenge), but the actual data content and request format must be inferred from the endpoint path alone.","tags":[],"capabilities":["market-quotes","cme-data","x402-payment","usdc-settlement","base-network","per-request-pricing","no-api-key"],"categories":["finance","market-data"],"synonyms":["CME quotes","futures market data","commodity quotes","market price feed","CME exchange data","financial quotes API"],"warnings":["No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided; request body format is unknown","Actual CME quote data fields and freshness/source are undocumented","The endpoint path suggests CME market data but there is no confirmation of data source or licensing"],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/CME","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/market/quote/CME","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no API documentation, no request/response schema, no examples, and the docs pages are all empty beyond a wallet connect prompt. The actual data content of the CME quote is 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'0.02':10,22,59,113 '000':105 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':122 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':93 '20':104 '300':128 '402':184 '6':110 'CME exchange data' 'CME quotes' 'accept':77,177 'actual':188 'address':120 'ai/ml':51 'alon':201 'amount':101 'analyt':50 'api':55,64,137 'base':9,21,88,106 'base-network' 'behind':37 'bodi':176 'broader':46 'call':116 'challeng':185 'chicago':31 'cme':1,13,30,168 'cme-data' 'commit':71 'commodity quotes' 'confirm':181 'connect':146 'contain':170 'content':152,190 'contract':92 'crawl':135 'data':4,16,36,49,189 'decim':111 'descript':163 'doc':136 'document':130 'endpoint':26,75,179,199 'equal':112 'exact':97 'exampl':160 'exchang':33 'extrem':132 'field':166 'financ':52 'financial quotes API' 'format':193 'futures market data' 'infer':196 'infrastructur':54 'json':82 'key':65 'limit':68 'live':182 'lowpaymentfee.com':28 'market':2,14,34 'market price feed' 'market-quotes' 'max':100 'mercantil':32 'micropay':7,19 'must':194 'network':89 'no-api-key' 'offer':48 'openapi':156 'page':141 'paramet':173 'part':43 'path':200 'payment':83,118,125 'paywal':40 'per':11,23,60,115 'per-request-pricing' 'platform':47 'post':78,175 'price':57,138 'prompt':148 'provid':29 'quot':3,15,35,169 'rate':67 'readm':140 'recipi':119 'request':12,24,61,79,192 'request/response':159 'requir':72,102 'return':81,143,183 'schema':157 'scheme':98 'second':129 'settl':85 'spars':133 'specif':74 'timeout':126 'unit':107 'usd':114 'usdc':91 'usdc-settlement' 'use':90 'via':5,17,94 'wallet':147 'x402':6,18,39,96 'x402-payment'","prices":[{"id":"8a8ef04d-3713-4894-9ef5-3c6ec54bd07f","listingId":"e5b8f12f-ee6b-4fb6-8b23-9fb9d68ffad6","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/market/quote/CME","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:18.651Z"}],"sources":[{"listingId":"e5b8f12f-ee6b-4fb6-8b23-9fb9d68ffad6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/CME","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:18.651Z","lastSeenAt":"2026-04-22T10:30:53.990Z"}],"details":{"listingId":"e5b8f12f-ee6b-4fb6-8b23-9fb9d68ffad6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/CME \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/market/quote/CME"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/market/quote/CME"}],"useCases":["Fetching real-time or recent CME market quotes for trading applications","Integrating CME price data into automated trading bots or agents","Building financial dashboards that pull commodity/futures pricing on demand"],"bestFor":["Agents or apps needing on-demand CME market data without subscription commitments","Developers who want keyless, pay-per-call access to financial data","Crypto-native workflows that can settle micropayments in USDC on Base"],"notFor":["High-frequency trading requiring sub-second latency and bulk data (no documented rate guarantees)","Users who need detailed API documentation or guaranteed SLAs before integrating","Applications requiring non-USDC or non-Base-network payment settlement"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T19:16:54.581Z"},"updatedAt":"2026-04-22T10:30:53.990Z"}}