{"id":"542d769a-e296-4265-8ac7-9e37c0a16db6","shortId":"S6zUry","kind":"x402","title":"Pay-per-call stock market quote for UNP via x402 on Base, settled in USDC.","tagline":"Pay-per-call stock market quote for UNP via x402 on Base, settled in USDC.","description":"This endpoint at lowpaymentfee.com provides a market quote for the ticker symbol UNP (Union Pacific Corporation) via a simple POST request. It is part of a broader suite of finance, analytics, AI, and utility APIs offered by the same provider, all using the x402 payment protocol on the Base network.\n\nThe endpoint is live and returns a standard x402 402 challenge. Each request costs $0.02 in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, maxAmountRequired=20000 base units = 0.02 USDC at 6 decimals). Payment is made via the x402 exact scheme with no API keys, no rate limits, and no subscriptions required — you pay per call. The response MIME type is application/json.\n\nDocumentation beyond the landing page is essentially absent; the /docs, /pricing, /api, and /README pages all resolve to a wallet-connect stub with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint path suggests it returns a financial quote for the UNP stock ticker, but the exact fields in the response body are unknown. The provider advertises a uniform $0.02/request pricing across all endpoints.","tags":[],"capabilities":["stock-quote","market-data","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key"],"categories":["finance","market-data"],"synonyms":["Union Pacific stock quote","UNP ticker price","stock market API","equity quote API","x402 finance endpoint","crypto-paid stock data"],"warnings":["No OpenAPI or schema available — request and response formats are unknown","All documentation pages (/docs, /pricing, /api, /README) return only a wallet-connect stub with no content","The exact data fields returned in the market quote response cannot be verified","Provider offers many endpoints but none have published schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/UNP","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/UNP","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation, and no example payloads. The actual data returned is entirely unknown, making this effectively a stub 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'/docs':151 '/pricing':152 '/readme':155 '/request':213 '0.02':97,108,212 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':101 '20000':105 '402':92 '6':111 'UNP ticker price' 'Union Pacific stock quote' 'absent':149 'across':215 'addit':167 'advertis':209 'ai':64 'analyt':63 'api':67,123 'application/json':141 'asset':100 'avail':182 'base':13,29,81,103,106 'base-network' 'beyond':143 'bodi':204 'broader':59 'call':4,20,135 'challeng':93 'connect':163 'corpor':48 'cost':96 'crypto-paid stock data' 'decim':112 'detail':169 'document':142 'endpoint':34,84,184,217 'equity quote API' 'essenti':148 'exact':119,199 'exampl':180 'field':200 'financ':62 'financi':190 'key':124 'land':145 'limit':127 'live':86 'lowpaymentfee.com':36 'made':115 'market':6,22,39 'market-data' 'maxamountrequir':104 'mime':138 'network':82 'no-api-key' 'offer':68 'openapi':173 'pacif':47 'page':146,156 'part':56 'path':185 'pay':2,18,133 'pay-per-cal':1,17 'pay-per-call' 'payload':181 'payment':77,113 'per':3,19,134 'post':52 'price':214 'protocol':78 'provid':37,72,208 'quot':7,23,40,191 'rate':126 'request':53,95 'request/response':176 'requir':131 'resolv':158 'respons':137,203 'return':88,188 'schema':177 'scheme':120 'settl':14,30 'simpl':51 'spec':174 'standard':90 'stock':5,21,195 'stock market API' 'stock-quote' 'stub':164 'subscript':130 'suggest':186 'suit':60 'symbol':44 'technic':168 'ticker':43,196 'type':139 'uniform':211 'union':46 'unit':107 'unknown':206 'unp':9,25,45,194 'usdc':16,32,99,109 'usdc-settlement' 'use':74 'util':66 'via':10,26,49,116 'wallet':162 'wallet-connect':161 'x402':11,27,76,91,118 'x402 finance endpoint' 'x402-payment'","prices":[{"id":"4649b29a-5662-489c-a981-a823fb77c54c","listingId":"542d769a-e296-4265-8ac7-9e37c0a16db6","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/UNP","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:22.295Z"}],"sources":[{"listingId":"542d769a-e296-4265-8ac7-9e37c0a16db6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/UNP","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:22.295Z","lastSeenAt":"2026-04-22T10:30:54.181Z"}],"details":{"listingId":"542d769a-e296-4265-8ac7-9e37c0a16db6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/UNP \\\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":"Endpoint returns a 402 x402 challenge with maxAmountRequired=20000 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/market/quote/UNP"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/market/quote/UNP"},{"claim":"Uniform $0.02/request pricing, no API keys, no rate limits","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching a real-time or recent market quote for Union Pacific (UNP) stock","Integrating pay-per-call stock data into an AI agent workflow without API key management","Building trading bots or dashboards that settle data costs in USDC on Base"],"bestFor":["Agents or apps that need on-demand stock quotes without subscription overhead","Developers who prefer crypto-native micropayment APIs over traditional API key billing","Quick, low-cost single-ticker lookups for UNP"],"notFor":["Bulk or high-frequency market data ingestion across many tickers (only UNP path documented)","Users who need detailed documentation, schemas, or guaranteed SLAs","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:33:38.667Z"},"updatedAt":"2026-04-22T10:30:54.181Z"}}