{"id":"a526816a-ea66-4be6-8bf2-1c678120ce12","shortId":"fLD5FC","kind":"x402","title":"Stock market quote for NSC via x402 micropayment on Base, $0.02 per request.","tagline":"Stock market quote for NSC via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides a market quote for the ticker symbol NSC (Norfolk Southern 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 (20,000 base units of USDC with 6 decimals) and requires no API keys, accounts, or rate-limit management — payment is handled per-call via the x402 `X-PAYMENT` header.\n\nThe endpoint accepts HTTP POST requests and returns JSON. The x402 challenge was successfully captured, confirming the endpoint is live. Payment is settled in USDC (contract `0x8335…2913`) on Base to the payee address `0x1A2B…85F3`. The maximum timeout for payment settlement is 300 seconds.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /pricing, /api, and /README pages all returned only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The exact fields returned in the market quote response are unknown and must be discovered by making a paid request. The platform advertises no rate limits and instant access.","tags":[],"capabilities":["stock-market-quote","x402-payment","usdc-micropayment","base-network","per-request-pricing","no-api-key","json-response"],"categories":["finance","market-data"],"synonyms":["NSC stock quote","Norfolk Southern quote","stock price API","equity market data","ticker quote API","x402 finance API","micropayment stock data"],"warnings":["No OpenAPI spec or request/response schema available","All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no content","Response format and fields for the market quote are completely unknown","It is unclear whether this returns real-time, delayed, or cached market data","Endpoint is scoped to a single ticker (NSC); generalizability unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/NSC","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/NSC","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is zero documentation on request parameters or response schema. The /docs, /pricing, and /README pages are all empty beyond a wallet-connect prompt. Without any OpenAPI spec, examples, or field descriptions, this is effectively a stub 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'/docs':161 '/pricing':162 '/readme':165 '0.02':11,24,73 '000':75 '0x1a2b':141 '0x8335':133 '20':74 '2913':134 '300':150 '6':81 '85f3':142 'NSC stock quote' 'Norfolk Southern quote' 'accept':109 'access':60,221 'account':88 'addit':176 'address':140 'advertis':215 'ai':55 'analyt':54 'api':58,86 'avail':192 'base':10,23,68,76,136 'base-network' 'beyond':153 'broader':50 'call':99 'captur':121 'challeng':118 'confirm':122 'connect':171 'contract':132 'corpor':40 'cost':72 'decim':82 'detail':178 'discov':207 'document':152,187 'endpoint':28,108,124 'equity market data' 'exact':194 'exampl':190 'extrem':158 'field':195 'financ':53 'handl':96 'header':106 'http':110 'instant':220 'json':115 'json-response' 'key':87 'land':155 'limit':92,218 'live':126 'lowpaymentfee.com':43 'make':209 'manag':93 'market':2,15,31,199 'maximum':144 'micropay':8,21 'micropayment stock data' 'must':205 'network':69 'no-api-key' 'norfolk':38 'nsc':5,18,37 'openapi':182 'page':156,166 'paid':211 'part':47 'paye':139 'payload':191 'payment':64,94,105,127,147 'per':12,25,98 'per-cal':97 'per-request-pricing' 'platform':44,214 'post':111 'prompt':173 'protocol':65 'provid':29 'quot':3,16,32,200 'rate':91,217 'rate-limit':90 'request':13,26,71,112,212 'request/response':185 'requir':84 'respons':201 'return':114,168,196 'schema':186 'second':151 'settl':129 'settlement':148 'southern':39 'spars':159 'spec':183 'stock':1,14 'stock price API' 'stock-market-quote' 'success':120 'suit':51 'symbol':36 'technic':177 'ticker':35 'ticker quote API' 'timeout':145 'unit':77 'unknown':203 'usdc':79,131 'usdc-micropayment' 'util':57 'via':6,19,61,100 'wallet':172 'x':104 'x-payment':103 'x402':7,20,63,102,117 'x402 finance API' 'x402-payment'","prices":[{"id":"3de78b15-7d67-4fc8-a8eb-59020b62f10b","listingId":"a526816a-ea66-4be6-8bf2-1c678120ce12","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/NSC","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:52.287Z"}],"sources":[{"listingId":"a526816a-ea66-4be6-8bf2-1c678120ce12","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/NSC","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:52.287Z","lastSeenAt":"2026-04-22T07:00:31.926Z"}],"details":{"listingId":"a526816a-ea66-4be6-8bf2-1c678120ce12","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/NSC \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge advertising USDC on Base at 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/market/quote/NSC"},{"claim":"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/market/quote/NSC"},{"claim":"Documentation pages /docs, /pricing, /api, /README all show only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching a real-time or near-real-time market quote for NSC (Norfolk Southern) programmatically","Integrating stock quote data into an AI agent workflow without managing API keys","Pay-per-call market data access for low-volume or sporadic usage patterns"],"bestFor":["Agents or bots that need on-demand stock quotes without subscription overhead","Developers prototyping finance apps who want instant access with no signup","x402-native workflows on the Base network needing market data"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk data","Users who need quotes for arbitrary tickers (this endpoint is scoped to NSC only)","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:46.532Z"},"updatedAt":"2026-04-22T07:00:31.926Z"}}