{"id":"9145772f-4fb0-482d-b297-9f855996f96d","shortId":"2LmBhK","kind":"x402","title":"Pay-per-call crude oil (CL) price data via x402 on Base, settled in USDC.","tagline":"Pay-per-call crude oil (CL) price data via x402 on Base, settled in USDC.","description":"This endpoint returns the current price of crude oil (ticker CL) through a simple POST request, paid per call using the x402 protocol. It is hosted on lowpaymentfee.com, a platform that offers a broad catalog of pay-per-request APIs spanning finance, AI/ML, data analytics, and infrastructure utilities — all settled on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stocks/CL/price` sits under the Finance & Web3 category of the platform. The x402 challenge confirms the endpoint is live and accepts exact-scheme payments on Base with a maximum cost of 20,000 base units of USDC (0.02 USD per request). No API keys, subscriptions, or rate limits are required; callers simply attach an x402 payment header to each request. The payment is directed to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` and the asset is USDC at `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of the response schema. The endpoint name strongly implies it returns a JSON object containing the current crude oil spot or futures price, but the exact fields are unconfirmed.","tags":[],"capabilities":["commodity-price","crude-oil","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","real-time-data"],"categories":["finance","commodities"],"synonyms":["crude oil price API","CL futures price","WTI oil price","commodity price feed","oil market data","x402 finance API","USDC pay-per-call"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","All documentation pages (/docs, /pricing, /api, /README) return only a 'Connect wallet' prompt with no technical content","Exact response fields for the CL price endpoint are unconfirmed; listing is partially inferred from the URL path"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/CL/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/CL/price","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The x402 challenge is live and confirms pricing and payment details, but there is no OpenAPI spec, no documented request/response schema, and all doc pages render only a wallet-connect prompt. The endpoint's behavior must be inferred entirely from its URL 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'/api/v1/stocks/cl/price':93 '/docs':178 '/pricing':179 '/readme':182 '0.02':130 '000':125 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':159 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':166 '20':124 'CL futures price' 'USDC pay-per-call' 'WTI oil price' 'accept':112 'addit':193 'address':158 'ai/ml':76 'analyt':78 'api':73,135 'asset':162 'attach':145 'base':13,29,86,118,126,168 'base-network' 'beyond':170 'broad':66 'call':4,20,51 'caller':143 'catalog':67 'categori':99 'challeng':105 'cl':7,23,43 'commodity price feed' 'commodity-price' 'confirm':106 'connect':188 'contain':222 'cost':122 'crude':5,21,40,225 'crude oil price API' 'crude-oil' 'current':37,224 'data':9,25,77 'descript':207 'detail':195 'direct':156 'document':169 'endpoint':34,92,108,213 'exact':114,233 'exact-schem':113 'exampl':202 'extrem':175 'field':234 'financ':75,97 'futur':229 'header':149 'host':58 'impli':216 'infrastructur':80 'json':220 'key':136 'land':172 'limit':140 'live':110 'lowpaymentfee.com':60 'maximum':121 'name':214 'network':87 'no-api-key' 'object':221 'offer':64 'oil':6,22,41,226 'oil market data' 'openapi':199 'page':173,183 'paid':49 'pay':2,18,70 'pay-per-cal':1,17 'pay-per-request':69 'payload':204 'payment':116,148,154 'per':3,19,50,71,132 'platform':62,102 'post':47 'price':8,24,38,230 'prompt':190 'protocol':55 'rate':139 'real-time-data' 'render':185 'request':48,72,133,152 'request/response':203 'requir':142 'respons':210 'return':35,218 'schema':211 'scheme':115 'settl':14,30,83 'simpl':46 'simpli':144 'sit':94 'span':74 'spars':176 'spec':200 'specif':91 'spot':227 'strong':215 'subscript':137 'technic':194 'ticker':42 'unconfirm':236 'unit':127 'usd':131 'usdc':16,32,89,129,164 'usdc-settlement' 'use':52,88 'util':81 'via':10,26 'wallet':189 'web3':98 'x402':11,27,54,104,147 'x402 finance API' 'x402-payment'","prices":[{"id":"2256cb89-f629-4a65-9158-108149f23435","listingId":"9145772f-4fb0-482d-b297-9f855996f96d","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/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":"2026-04-18T18:37:59.651Z"}],"sources":[{"listingId":"9145772f-4fb0-482d-b297-9f855996f96d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/CL/price","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:59.651Z","lastSeenAt":"2026-05-01T13:05:15.860Z"}],"details":{"listingId":"9145772f-4fb0-482d-b297-9f855996f96d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/CL/price \\\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":"The endpoint returns HTTP 402 with an x402 challenge advertising USDC payment on Base at 20,000 base units (0.02 USD)","source_url":"https://lowpaymentfee.com/api/v1/stocks/CL/price"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stocks/CL/price"}],"useCases":["Fetching the latest crude oil price for trading bots or dashboards","Integrating real-time commodity data into DeFi or Web3 applications","Agent-driven portfolio monitoring that needs on-demand oil price lookups","Embedding commodity price checks into automated financial workflows"],"bestFor":["Developers who want instant, keyless access to crude oil prices","AI agents that need pay-per-call commodity data without subscriptions","Web3-native applications settling microtransactions on Base"],"notFor":["Users needing historical OHLCV candle data or bulk time-series downloads","Applications requiring sub-second streaming commodity feeds","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:43.257Z"},"updatedAt":"2026-05-01T13:05:15.860Z"}}