{"id":"449da24f-4365-4fbc-aa12-59a76dedf7f8","shortId":"t6jFNd","kind":"x402","title":"Stock market quote for DUK via x402 micropayment on Base, $0.02 per request.","tagline":"Stock market quote for DUK via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides a market quote for the ticker symbol DUK (Duke Energy Corporation) through the lowpaymentfee.com platform. It is part of a broader suite of finance, analytics, AI, and utility APIs all accessible via the x402 payment protocol on the Base network. Each request costs $0.02 in USDC, settled on-chain with no API keys, no rate limits, and no subscriptions required.\n\nThe endpoint accepts HTTP POST requests and returns JSON. Payment is handled via the x402 protocol: callers include an X-PAYMENT header containing a signed payment authorization for 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) on the Base L2 network. The payment is directed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the USDC contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.\n\nDocumentation beyond the landing page is sparse — the /docs, /pricing, and /README pages all resolve to a wallet-connect stub with no additional technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of the response format. The endpoint is confirmed live (returns a proper 402 challenge), but the actual data source, response fields, and data freshness are unknown.","tags":[],"capabilities":["stock-market-quote","x402-payment","usdc-micropayment","base-network","per-request-pricing","no-api-key","json-response"],"categories":["finance","market-data"],"synonyms":["stock quote API","DUK stock price","Duke Energy quote","market data API","equity quote","ticker quote","x402 finance API"],"warnings":["No API documentation available — /docs, /pricing, and /README pages are empty stubs","No OpenAPI or output schema describing the response format for the DUK quote","Response fields, data source, and data freshness are completely unknown","The broader platform lists many endpoint categories but none have documented schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/DUK","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/DUK","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 ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no example payloads, and all documentation pages beyond the landing page are empty wallet-connect stubs. The actual data returned is entirely 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'/pricing':160 '/readme':162 '0.02':11,24,73,126 '000':121 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':144 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':150 '20':120 '402':201 '6':131 'DUK stock price' 'Duke Energy quote' 'accept':93 'access':60 'actual':205 'addit':174 'address':143 'ai':55 'analyt':54 'api':58,82 'author':118 'base':10,23,68,122,135 'base-network' 'beyond':152 'broader':50 'caller':107 'chain':79 'challeng':202 'confirm':196 'connect':170 'contain':114 'contract':148 'corpor':40 'cost':72 'data':206,211 'decim':132 'descript':188 'detail':176 'direct':141 'document':151 'duk':5,18,37 'duke':38 'endpoint':28,92,194 'energi':39 'equity quote' 'exampl':183 'field':209 'financ':53 'format':192 'fresh':212 'handl':102 'header':113 'http':94 'includ':108 'json':99 'json-response' 'key':83 'l2':136 'land':154 'limit':86 'live':197 'lowpaymentfee.com':43 'market':2,15,31 'market data API' 'micropay':8,21 'network':69,137 'no-api-key' 'on-chain':77 'openapi':180 'page':155,163 'part':47 'payload':185 'payment':64,100,112,117,139 'per':12,25 'per-request-pricing' 'platform':44 'post':95 'proper':200 'protocol':65,106 'provid':29 'quot':3,16,32 'rate':85 'request':13,26,71,96 'request/response':184 'requir':90 'resolv':165 'respons':191,208 'return':98,198 'schema':181 'settl':76 'sign':116 'sinc':128 'sourc':207 'spars':157 'stock':1,14 'stock quote API' 'stock-market-quote' 'stub':171 'subscript':89 'suit':51 'symbol':36 'technic':175 'ticker':35 'ticker quote' 'unit':123 'unknown':214 'usd':127 'usdc':75,125,129,147 'usdc-micropayment' 'use':130,145 'util':57 'via':6,19,61,103 'wallet':169 'wallet-connect':168 'x':111 'x-payment':110 'x402':7,20,63,105 'x402 finance API' 'x402-payment'","prices":[{"id":"c97a4dd5-156d-4a5e-86e5-53e583989583","listingId":"449da24f-4365-4fbc-aa12-59a76dedf7f8","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/DUK","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:43.067Z"}],"sources":[{"listingId":"449da24f-4365-4fbc-aa12-59a76dedf7f8","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/DUK","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:43.067Z","lastSeenAt":"2026-04-22T09:00:32.957Z"}],"details":{"listingId":"449da24f-4365-4fbc-aa12-59a76dedf7f8","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/DUK \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-signed-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/market/quote/DUK"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/market/quote/DUK"},{"claim":"Documentation pages (/docs, /pricing, /README) resolve to wallet-connect stubs with no content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieve a current market quote for Duke Energy (DUK) in an automated trading or research pipeline","Agent-driven portfolio monitoring that pays per-call with no subscription","Embedding real-time stock data into dashboards or reports without managing API keys"],"bestFor":["Agents or bots that need on-demand stock quotes with crypto micropayments","Developers who want keyless, pay-per-use market data on Base","Low-volume or sporadic access to DUK market data without subscription overhead"],"notFor":["High-frequency trading requiring sub-millisecond latency and guaranteed SLAs","Users who need bulk historical market data downloads","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:37:27.66Z"},"updatedAt":"2026-04-22T09:00:32.957Z"}}