{"id":"d28fe75f-3a56-4069-aa81-941043070793","shortId":"jWwdVp","kind":"x402","title":"Historical stock data for DUK (Duke Energy) via x402 micropayment on Base, $0.02/request.","tagline":"Historical stock data for DUK (Duke Energy) via x402 micropayment on Base, $0.02/request.","description":"This endpoint provides historical stock price data for DUK (Duke Energy Corporation) through the lowpaymentfee.com platform. It is part of a broader suite of pay-per-request APIs covering finance, AI/ML, data analytics, and infrastructure utilities. The endpoint uses the x402 payment protocol, settling in USDC on the Base network at $0.02 per request.\n\nThe endpoint accepts POST requests and returns JSON. No API keys or account registration are required — payment is handled inline via the X-PAYMENT header using the x402 protocol. The platform advertises no rate limits and instant access. The specific stock ticker in this endpoint is DUK, though the provider's site lists a general finance/prices endpoint as well, suggesting this may be one of many ticker-specific routes.\n\nDocumentation is extremely sparse. The provider's /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no description of request parameters, and no example responses. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what request body fields are expected or what shape the historical data response takes.","tags":[],"capabilities":["stock-history","historical-price-data","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["finance","data"],"synonyms":["stock price history","DUK stock data","Duke Energy historical prices","equity price API","stock market data","financial data API","x402 stock API"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content","No OpenAPI schema or request/response examples provided","Request body parameters and response format are completely unknown","Only the DUK ticker is represented at this endpoint; coverage of other tickers is unconfirmed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/DUK/history","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/DUK/history","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 402 challenge and clear pricing ($0.02 USDC on Base). However, documentation is essentially nonexistent — no request/response schema, no parameter descriptions, no examples. The listing is largely inferred from the URL path and the homepage's generic 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'/docs':162 '/pricing':163 '/readme':166 '/request':14,28 '0.02':13,27,81 '402':201 'DUK stock data' 'Duke Energy historical prices' 'accept':86 'access':122 'account':96 'advertis':116 'ai/ml':60 'analyt':62 'api':57,93 'base':12,26,78 'base-network' 'bodi':211 'broader':50 'challeng':202 'confirm':196 'connect':172 'content':178 'corpor':40 'cover':58 'data':3,17,35,61,220 'descript':185 'document':155,205 'duk':5,19,37,131 'duke':6,20,38 'endpoint':30,67,85,129,141,194 'energi':7,21,39 'equity price API' 'exampl':191 'expect':214 'extrem':157 'field':212 'financ':59 'finance/prices':140 'financial data API' 'general':139 'handl':102 'header':109 'histor':1,15,32,219 'historical-price-data' 'infrastructur':64 'inlin':103 'instant':121 'json':91 'key':94 'limit':119 'list':137 'live':197 'lowpaymentfee.com':43 'mani':150 'may':146 'micropay':10,24 'network':79 'no-api-key' 'one':148 'openapi':182 'page':167 'paramet':188 'part':47 'pay':54 'pay-per-request':53 'payment':71,100,108 'per':55,82 'platform':44,115 'post':87 'price':34 'prompt':174 'proper':200 'protocol':72,113 'provid':31,134,160 'rate':118 'registr':97 'render':169 'request':56,83,88,187,210 'requir':99 'respons':192,221 'return':90,198 'rout':154 'schema':183 'settl':73 'shape':217 'site':136 'spars':158 'specif':124,153 'stock':2,16,33,125 'stock market data' 'stock price history' 'stock-history' 'substant':177 'suggest':144 'suit':51 'take':222 'though':132 'ticker':126,152 'ticker-specif':151 'unclear':208 'usdc':75 'usdc-settlement' 'use':68,110 'util':65 'via':8,22,104 'wallet':173 'well':143 'without':204 'x':107 'x-payment':106 'x402':9,23,70,112 'x402 stock API' 'x402-payment'","prices":[{"id":"3b606324-d0c1-4cf0-8ed1-c9bfc5c0e5de","listingId":"d28fe75f-3a56-4069-aa81-941043070793","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/DUK/history","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:59.194Z"}],"sources":[{"listingId":"d28fe75f-3a56-4069-aa81-941043070793","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/DUK/history","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:59.194Z","lastSeenAt":"2026-04-29T14:33:37.943Z"}],"details":{"listingId":"d28fe75f-3a56-4069-aa81-941043070793","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/DUK/history \\\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 a 402 challenge with maxAmountRequired of 20000 base units (USDC, 6 decimals = $0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/stocks/DUK/history"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is USDC on Base","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving historical stock price data for Duke Energy (DUK) for backtesting or analysis","Integrating pay-per-call stock data into autonomous agent workflows without API key management","Building financial dashboards that pull historical equity data on demand"],"bestFor":["Agents needing on-demand historical stock data without subscription commitments","Developers who want to pay per request with crypto (USDC on Base)","Lightweight integrations that don't require API key provisioning"],"notFor":["High-frequency trading requiring sub-second latency and guaranteed SLAs","Users who need comprehensive documentation or OpenAPI specs before integrating","Bulk historical data downloads covering many tickers at once"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:49.155Z"},"updatedAt":"2026-04-29T14:33:37.943Z"}}