{"id":"550595fa-fd18-46f1-bc51-c13378ab26b1","shortId":"4hhN6N","kind":"x402","title":"Get the current stock price for UNP (Union Pacific) via x402 micropayment on Base.","tagline":"Get the current stock price for UNP (Union Pacific) via x402 micropayment on Base.","description":"This endpoint returns the current stock price for Union Pacific Corporation (ticker: UNP) through the x402 payment protocol. It is part of a broader API platform at lowpaymentfee.com that offers data analytics, AI/ML inference, finance, crypto, and utility endpoints — all payable per-request with no API keys, no rate limits, and no subscriptions.\n\nThe endpoint accepts HTTP POST requests and is secured by the x402 protocol on the Base network. Each call costs $0.02 in USDC (USD Coin, contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, 6 decimals — the maxAmountRequired of 20000 base units equals $0.02). Payment is made via the X-PAYMENT header; no traditional authentication or API key is needed. The response MIME type is application/json.\n\nDocumentation on the site is minimal — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of the response fields. The endpoint is confirmed live (returns a proper 402 challenge), but the exact shape of the stock-price response must be inferred from the endpoint path and description.","tags":[],"capabilities":["stock-price-lookup","x402-payment","per-request-micropayment","base-network-usdc","no-api-key","real-time-data"],"categories":["finance","data"],"synonyms":["stock price API","UNP stock price","Union Pacific stock","equity price feed","market data API","x402 stock data","micropayment stock API"],"warnings":["No OpenAPI or response schema available — response fields are unknown","Site documentation pages (docs, pricing, API, README) are effectively empty","No example request or response payloads could be sourced","Stock data source and update frequency are undisclosed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/UNP/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/UNP/price","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no example payloads, and the site's docs/pricing/API pages are empty beyond a wallet-connect prompt. The listing is largely inferred from the URL path and the x402 challenge 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'0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':109 '20000':115 '402':191 '6':110 'UNP stock price' 'Union Pacific stock' 'accept':85 'ai/ml':61 'analyt':60 'api':53,75,133,153 'application/json':142 'authent':131 'base':14,28,98,116 'base-network-usdc' 'broader':52 'call':101 'challeng':192 'coin':107 'confirm':186 'connect':159 'contract':108 'corpor':39 'cost':102 'crypto':64 'current':3,17,33 'data':59 'decim':111 'descript':178,211 'detail':166 'doc':150 'document':143 'endpoint':30,67,84,184,208 'equal':118 'equity price feed' 'exact':195 'exampl':173 'field':182 'financ':63 'get':1,15 'header':128 'http':86 'infer':62,205 'key':76,134 'limit':79 'live':187 'lowpaymentfee.com':56 'made':122 'market data API' 'maxamountrequir':113 'micropay':12,26 'micropayment stock API' 'mime':139 'minim':148 'must':203 'need':136 'network':99 'no-api-key' 'offer':58 'openapi':170 'pacif':9,23,38 'page':154 'part':49 'path':209 'payabl':69 'payload':175 'payment':45,120,127 'per':71 'per-request':70 'per-request-micropayment' 'platform':54 'post':87 'price':5,19,35,151,201 'prompt':161 'proper':190 'protocol':46,95 'rate':78 'real-time-data' 'render':156 'request':72,88 'request/response':174 'respons':138,181,202 'return':31,188 'schema':171 'secur':91 'shape':196 'site':146 'stock':4,18,34,200 'stock price API' 'stock-pric':199 'stock-price-lookup' 'subscript':82 'technic':165 'ticker':40 'tradit':130 'type':140 'union':8,22,37 'unit':117 'unp':7,21,41 'usd':106 'usdc':105 'util':66 'via':10,24,123 'wallet':160 'x':126 'x-payment':125 'x402':11,25,44,94 'x402 stock data' 'x402-payment'","prices":[{"id":"4bacea79-0349-4f58-ae62-17943fdb52b1","listingId":"550595fa-fd18-46f1-bc51-c13378ab26b1","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/UNP/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":"2026-04-18T18:35:42.767Z"}],"sources":[{"listingId":"550595fa-fd18-46f1-bc51-c13378ab26b1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/UNP/price","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:42.767Z","lastSeenAt":"2026-04-29T15:04:28.829Z"}],"details":{"listingId":"550595fa-fd18-46f1-bc51-c13378ab26b1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/UNP/price \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","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 $0.02 USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stocks/UNP/price"},{"claim":"The platform advertises $0.02 per request, no API keys, no rate limits, 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/UNP/price"}],"useCases":["Retrieve the latest stock price for Union Pacific (UNP) in an automated trading or analytics pipeline","Integrate real-time equity pricing into an AI agent workflow without managing API keys","Pay-per-call stock data access for low-volume or experimental applications"],"bestFor":["Developers who want keyless, pay-per-request stock price data","AI agents that can settle x402 micropayments on Base","Prototyping financial dashboards without subscription commitments"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk data","Users who need historical OHLCV or full market-depth data (not offered here)","Anyone unable to transact USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:49.917Z"},"updatedAt":"2026-04-29T15:04:28.829Z"}}