{"id":"55493088-bb79-479b-87b1-f9bb4074eecf","shortId":"67RWaB","kind":"x402","title":"Pay-per-call stock quote for NSC (Norfolk Southern) via x402 on Base, settled in USDC.","tagline":"Pay-per-call stock quote for NSC (Norfolk Southern) via x402 on Base, settled in USDC.","description":"This endpoint at lowpaymentfee.com provides stock data for NSC (Norfolk Southern Corporation) through a simple POST request, paid per call using the x402 protocol. Payment is settled in USDC on the Base network at $0.02 per request. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe provider (lowpaymentfee.com) hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services, all at a uniform $0.02/request price point. This specific endpoint targets the stock ticker NSC. The x402 challenge confirms the endpoint is live, accepting POST requests, and returning application/json responses.\n\nDocumentation is extremely sparse — the docs, pricing, API, and README 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 format. The exact fields returned for a stock quote are unknown and must be discovered by making a paid call.","tags":[],"capabilities":["stock-quote","per-call-payment","x402-protocol","usdc-settlement","base-network","no-api-key","no-rate-limit"],"categories":["finance","data"],"synonyms":["stock price API","NSC stock data","Norfolk Southern quote","equity data endpoint","pay-per-call stock API","x402 stock quote","USDC micropayment API"],"warnings":["No OpenAPI or schema documentation available — response format is entirely unknown","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no technical content","The specific data fields returned for the stock ticker NSC are undocumented and must be discovered empirically","Provider hosts many diverse endpoints (AI, finance, utilities) all at the same price, which may indicate a generic wrapper rather than a specialized data source"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/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/stocks/NSC","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 via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no examples, and the docs pages are empty. The actual data returned is unknown, making this effectively a stub 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'0.02':69,118 'NSC stock data' 'Norfolk Southern quote' 'USDC micropayment API' 'accept':138 'account':75 'ai/ml':107 'analyt':106 'api':73,103,152 'application/json':143 'attach':83 'base':14,31,66 'base-network' 'broad':96 'call':4,21,54,102,202 'caller':81 'catalog':97 'challeng':132 'confirm':133 'connect':160 'corpor':46 'crypto':110 'data':41,105 'descript':179 'detail':167 'discov':197 'doc':150 'document':145 'endpoint':36,124,135 'equity data endpoint' 'exact':185 'exampl':174 'extrem':147 'field':186 'financ':109 'format':183 'header':87 'host':94 'infer':108 'key':74 'limit':78 'live':137 'lowpaymentfee.com':38,93 'make':199 'must':195 'network':67 'no-api-key' 'no-rate-limit' 'norfolk':9,26,44 'nsc':8,25,43,129 'openapi':171 'page':155 'paid':52,201 'pay':2,19,100 'pay-per-cal':1,18,99 'pay-per-call stock API' 'payload':176 'payment':59,86 'per':3,20,53,70,101 'per-call-payment' 'point':121 'post':50,139 'price':120,151 'prompt':162 'protocol':58 'provid':39,92 'quot':6,23,191 'rate':77 'readm':154 'render':157 'request':51,71,90,140 'request/response':175 'requir':80 'respons':144,182 'return':142,187 'schema':172 'servic':113 'settl':15,32,61 'simpl':49 'simpli':82 'southern':10,27,45 'span':104 'spars':148 'specif':123 'stock':5,22,40,127,190 'stock price API' 'stock-quote' 'target':125 'technic':166 'ticker':128 'uniform':117 'unknown':193 'usdc':17,34,63 'usdc-settlement' 'use':55 'util':112 'via':11,28 'wallet':161 'x402':12,29,57,85,131 'x402 stock quote' 'x402-protocol'","prices":[{"id":"a26a1be4-31c1-43bb-bbaa-40c88ba10539","listingId":"55493088-bb79-479b-87b1-f9bb4074eecf","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/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":"2026-04-18T18:35:35.520Z"}],"sources":[{"listingId":"55493088-bb79-479b-87b1-f9bb4074eecf","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/NSC","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:35.520Z","lastSeenAt":"2026-04-29T16:08:26.071Z"}],"details":{"listingId":"55493088-bb79-479b-87b1-f9bb4074eecf","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/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 accepting USDC on Base network at maxAmountRequired 20000 (= $0.02)","source_url":"https://lowpaymentfee.com/api/v1/stocks/NSC"},{"claim":"Provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stocks/NSC"},{"claim":"Docs, pricing, API, and README pages show only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving current or recent stock data for Norfolk Southern (NSC) without needing an API key or subscription","Integrating stock lookups into autonomous agent workflows that can settle payments via x402/USDC on Base","Building trading bots or dashboards that pay per query rather than maintaining a subscription"],"bestFor":["Agents or apps that need occasional stock lookups without subscription overhead","x402-native workflows already settling on Base in USDC","Developers who want zero-signup, instant access to stock data"],"notFor":["High-frequency trading requiring bulk or streaming data at sub-cent costs","Users who need comprehensive historical stock data or full market coverage","Anyone without a Base-compatible USDC wallet or x402 client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.261Z"},"updatedAt":"2026-04-29T16:08:26.071Z"}}