{"id":"5584c161-a195-468c-af3a-5d751fc665c2","shortId":"hGL3ST","kind":"x402","title":"Pay-per-call stock price data for CME via x402 on Base (USDC).","tagline":"Pay-per-call stock price data for CME via x402 on Base (USDC).","description":"This endpoint at lowpaymentfee.com provides stock/commodity price data for CME (Chicago Mercantile Exchange listed instruments) through the x402 payment protocol. Each API call costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required. The endpoint accepts POST requests and returns JSON.\n\nThe provider, lowpaymentfee.com, hosts a broader suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services, all priced at $0.02 per request and settled via USDC on Base. The specific endpoint `/api/v1/stocks/CME/price` appears to serve price information for CME-listed instruments. However, documentation is extremely thin — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further detail on request/response schemas, supported tickers, or data freshness.\n\nThe endpoint is live and returns a valid x402 challenge (HTTP 402) with `maxAmountRequired` of 20000 base units of USDC (6 decimals), which equals $0.02. Payment is settled on the Base network to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. Because there is no OpenAPI spec, no example responses, and no documentation beyond the landing page listing, the exact request body format and response structure are unknown.","tags":[],"capabilities":["stock-price-data","cme-instruments","x402-payment","usdc-base-settlement","pay-per-call","no-api-key","json-response"],"categories":["finance","data"],"synonyms":["CME stock price API","commodity price feed","market data API","x402 finance endpoint","pay-per-call stock data","Base USDC API","CME price lookup"],"warnings":["No API documentation available — docs, pricing, and API pages all show only 'Connect wallet'","Request body schema is unknown; no OpenAPI or example requests provided","Response schema is unknown; no example responses available","Data freshness, coverage of CME instruments, and update frequency are undocumented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/CME/price","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/stocks/CME/price","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge, confirming it accepts payments. However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs pages are empty beyond a wallet-connect prompt. The actual data returned is unknown, making this effectively a stub 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'0.02':53,104,181 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':191 '20000':172 '402':168 '6':177 'Base USDC API' 'CME price lookup' 'CME stock price API' 'accept':72 'address':190 'ai/ml':94 'analyt':93 'api':50,61,90,136 'appear':117 'base':13,27,58,112,173,187 'beyond':204 'bodi':212 'broader':83 'call':4,18,51,89 'challeng':166 'chicago':39 'cme':9,23,38,124 'cme-instruments' 'cme-list':123 'commodity price feed' 'connect':142 'cost':52 'crypto':97 'data':7,21,36,92,155 'decim':178 'detail':148 'doc':133 'document':128,203 'endpoint':30,71,115,158 'equal':180 'exact':210 'exampl':199 'exchang':41 'extrem':130 'financ':96 'format':213 'fresh':156 'host':81 'howev':127 'http':167 'infer':95 'inform':121 'instrument':43,126 'json':77 'json-response' 'key':62 'land':206 'limit':65 'list':42,125,208 'live':160 'lowpaymentfee.com':32,80 'market data API' 'maxamountrequir':170 'mercantil':40 'network':59,188 'no-api-key' 'openapi':196 'page':137,207 'pay':2,16,87 'pay-per-cal':1,15,86 'pay-per-call' 'pay-per-call stock data' 'payment':47,182 'per':3,17,88,105 'post':73 'price':6,20,35,102,120,134 'prompt':144 'protocol':48 'provid':33,79 'rate':64 'render':139 'request':74,106,211 'request/response':150 'requir':69 'respons':200,215 'return':76,162 'schema':151 'serv':119 'servic':100 'settl':108,184 'span':91 'spec':197 'specif':114 'stock':5,19 'stock-price-data' 'stock/commodity':34 'structur':216 'subscript':68 'suit':84 'support':152 'thin':131 'ticker':153 'unit':174 'unknown':218 'usdc':14,28,55,110,176 'usdc-base-settlement' 'util':99 'valid':164 'via':10,24,109 'wallet':143 'x402':11,25,46,165 'x402 finance endpoint' 'x402-payment'","prices":[{"id":"bbae24fd-bd70-4d51-8a0e-2e3dc0ee0367","listingId":"5584c161-a195-468c-af3a-5d751fc665c2","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/stocks/CME/price","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:52.531Z"}],"sources":[{"listingId":"5584c161-a195-468c-af3a-5d751fc665c2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/CME/price","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:52.531Z","lastSeenAt":"2026-04-29T15:04:29.336Z"}],"details":{"listingId":"5584c161-a195-468c-af3a-5d751fc665c2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/CME/price \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stocks/CME/price"},{"claim":"All APIs priced at $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 on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stocks/CME/price"}],"useCases":["Retrieving real-time or recent price data for CME-listed instruments","Automated trading bots needing on-demand price checks without API key management","Agent workflows that need market data with micropayment settlement on Base"],"bestFor":["Agents or bots that can settle USDC payments on Base","Low-volume, on-demand CME price lookups without subscription commitments","x402-native workflows needing financial market data"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk data","Users who need comprehensive historical price datasets or OHLCV candles","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:49.448Z"},"updatedAt":"2026-04-29T15:04:29.336Z"}}