{"id":"2596665f-ffe9-4ab5-944c-507180da845e","shortId":"feSKvs","kind":"x402","title":"Pay-per-call crude oil (CL) stock/commodity data via x402 on Base for $0.02 USDC.","tagline":"Pay-per-call crude oil (CL) stock/commodity data via x402 on Base for $0.02 USDC.","description":"This endpoint at lowpaymentfee.com provides commodity or stock data for the ticker \"CL\" (typically WTI Crude Oil futures) behind an x402 paywall. Each request costs $0.02 in USDC on the Base network — no API keys, no subscriptions, and no rate limits. The endpoint accepts POST requests and returns JSON.\n\nThe provider, lowpaymentfee.com, hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/crypto market data, and utility services, all priced uniformly at $0.02 per request. The specific /api/v1/stocks/CL endpoint is not explicitly listed on the homepage catalog (which focuses on analytics, AI, finance, and utility categories), but follows the same x402 payment pattern and pricing confirmed by the 402 challenge. The x402 challenge specifies payment to address 0x1A2B…85F3 using USDC (contract 0x8335…2913) on Base, with a max amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals).\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint is live (returns a proper 402 challenge), but the exact request body format and response structure must be discovered experimentally.","tags":[],"capabilities":["commodity-data","stock-data","x402-payment","usdc-base","pay-per-call","no-api-key","json-response"],"categories":["finance","data"],"synonyms":["crude oil price API","CL futures data","WTI crude oil","commodity price feed","stock quote API","x402 finance API","lowpaymentfee"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all show only a wallet-connect prompt","No OpenAPI or schema provided; request body format and response structure are unknown","The /api/v1/stocks/CL endpoint is not listed in the provider's own homepage catalog, raising questions about its support status","Cannot confirm what data is actually returned (real-time quotes, historical data, etc.)"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/CL","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/CL","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 402 challenge with clear pricing. However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The /stocks/CL path is not even listed on the provider's own homepage catalog. Effectively a stub 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'/api/v1/stocks/cl':115 '/docs':185 '/pricing':186 '/readme':189 '0.02':15,31,58,110,174 '000':170 '0x1a2b':155 '0x8335':160 '20':169 '2913':161 '402':146,223 '6':178 '85f3':156 'CL futures data' 'WTI crude oil' 'accept':76 'address':154 'ai':129 'ai/ml':98 'amount':167 'analyt':97,128 'api':66,94 'avail':215 'base':13,29,63,163,171 'behind':51 'bodi':229 'broad':87 'call':4,20,93 'catalog':88,124 'categori':133 'challeng':147,150,224 'cl':7,23,45 'commod':38 'commodity price feed' 'commodity-data' 'confirm':143 'connect':195 'contract':159 'cost':57 'crude':5,21,48 'crude oil price API' 'data':9,25,41,96,102 'decim':179 'detail':202 'discov':236 'document':180 'endpoint':34,75,116,217 'exact':227 'exampl':213 'experiment':237 'explicit':119 'extrem':182 'financ':130 'finance/crypto':100 'focus':126 'follow':135 'format':230 'futur':50 'given':175 'homepag':123 'host':85 'i.e':173 'infer':99 'json':81 'json-response' 'key':67 'limit':73 'list':120 'live':219 'lowpaymentfee' 'lowpaymentfee.com':36,84 'market':101 'max':166 'must':234 'network':64 'no-api-key' 'oil':6,22,49 'openapi':206 'page':190 'pattern':140 'pay':2,18,91 'pay-per-cal':1,17,90 'pay-per-call' 'payload':214 'payment':139,152 'paywal':54 'per':3,19,92,111 'post':77 'price':107,142 'prompt':197 'proper':222 'provid':37,83 'rate':72 'render':192 'request':56,78,112,228 'request/response':209 'respons':232 'return':80,220 'schema':210 'servic':105 'span':95 'spars':183 'spec':207 'specif':114 'specifi':151 'stock':40 'stock quote API' 'stock-data' 'stock/commodity':8,24 'structur':233 'subscript':69 'technic':201 'ticker':44 'typic':46 'uniform':108 'unit':172 'usdc':16,32,60,158,176 'usdc-base' 'use':157 'util':104,132 'via':10,26 'wallet':196 'wti':47 'x402':11,27,53,138,149 'x402 finance API' 'x402-payment'","prices":[{"id":"8cbf5026-a06a-48c0-b166-a8f47fd541b8","listingId":"2596665f-ffe9-4ab5-944c-507180da845e","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/CL","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:21.543Z"}],"sources":[{"listingId":"2596665f-ffe9-4ab5-944c-507180da845e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/CL","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:21.543Z","lastSeenAt":"2026-04-29T13:04:25.337Z"}],"details":{"listingId":"2596665f-ffe9-4ab5-944c-507180da845e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/CL \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stocks/CL"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stocks/CL"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"The homepage lists finance, AI, analytics, and utility API categories but does not list /api/v1/stocks/CL","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching current or recent crude oil (CL) price data programmatically","Building trading bots or dashboards that need on-demand commodity quotes","Agent-driven workflows that require pay-per-call financial data without subscription overhead"],"bestFor":["Developers needing quick, keyless access to CL commodity data","AI agents that can settle micropayments in USDC on Base","Low-volume or sporadic commodity data lookups where subscriptions are overkill"],"notFor":["High-frequency trading requiring sub-millisecond latency and guaranteed SLAs","Users who need comprehensive historical time-series data (no evidence this is supported)","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:48.024Z"},"updatedAt":"2026-04-29T13:04:25.337Z"}}