{"id":"094fdaa0-7a43-444f-82ec-4a65de08a2e2","shortId":"z4rsRE","kind":"x402","title":"Pay-per-call stock market quote for APD (Air Products) via x402 on Base, settled in USDC.","tagline":"Pay-per-call stock market quote for APD (Air Products) via x402 on Base, settled in USDC.","description":"This endpoint provides a market quote for the ticker symbol APD (Air Products & Chemicals, Inc.) through the lowpaymentfee.com platform. It is part of a broader suite of finance, AI, data analytics, and utility APIs, all accessible via the x402 payment protocol on the Base network. Each request costs $0.02 in USDC (USD Coin), with no API keys, rate limits, or subscriptions required.\n\nThe endpoint is live and responds with a standard x402 402 challenge when called without payment. It accepts POST requests and returns JSON. Payment is settled on-chain on Base to the specified payTo address using USDC (contract 0x8335…2913). The x402 challenge advertises a maxAmountRequired of 20000 base units, which at 6 decimals equals $0.02 per request.\n\nThe provider's landing page lists a wide catalog of endpoints across categories including finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), AI/ML (sentiment analysis, summarization, classification, embeddings), data analytics (metrics, reports, export, insights), and infrastructure utilities (geocoding, validation, conversion, generation). Documentation pages were largely empty at crawl time, showing only a \"Connect wallet\" prompt, so detailed request/response schemas for this specific endpoint are not available.","tags":[],"capabilities":["stock-market-quote","x402-payment","usdc-settlement","base-network","per-call-pricing","no-api-key","json-response"],"categories":["finance","market-data"],"synonyms":["APD stock quote","Air Products quote","market data API","stock price API","equity quote","x402 finance API","pay-per-call market data"],"warnings":["No request or response schema documented — the exact fields returned by a successful call are unknown.","Documentation pages (/docs, /api, /pricing, /README) are all empty stubs showing only 'Connect wallet'.","The ticker 'APD' is inferred to be Air Products & Chemicals based on standard US equity ticker conventions; this is not confirmed by the provider."],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/APD","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/APD","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","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, and all documentation pages returned only a 'Connect wallet' stub. The actual response payload for a successful paid request is 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'0x8335':138 '20000':147 '2913':139 '402':109 '6':152 'APD stock quote' 'Air Products quote' 'accept':116 'access':72 'across':169 'address':134 'advertis':143 'ai':65 'ai/ml':181 'air':10,28,48 'analysi':183 'analyt':67,188 'apd':9,27,47 'api':70,92 'avail':224 'base':15,33,80,129,148 'base-network' 'broader':61 'call':4,22,112 'catalog':166 'categori':170 'chain':127 'challeng':110,142 'chemic':50 'classif':185 'coin':89 'connect':211 'contract':137 'convers':198 'cost':84 'crawl':206 'data':66,187 'decim':153 'detail':215 'document':200 'embed':186 'empti':204 'endpoint':38,100,168,221 'equal':154 'equity quote' 'estim':180 'exchang':175 'export':191 'feed':174 'financ':64 'finance/web3':172 'gas':179 'generat':199 'geocod':196 'inc':51 'includ':171 'infrastructur':194 'insight':192 'json':121 'json-response' 'key':93 'land':161 'larg':203 'limit':95 'list':163 'live':102 'lowpaymentfee.com':54 'market':6,24,41 'market data API' 'maxamountrequir':145 'metric':189 'network':81 'no-api-key' 'on-chain':125 'page':162,201 'part':58 'pay':2,20 'pay-per-cal':1,19 'pay-per-call market data' 'payment':76,114,122 'payto':133 'per':3,21,156 'per-call-pricing' 'platform':55 'post':117 'price':173 'product':11,29,49 'prompt':213 'protocol':77 'provid':39,159 'quot':7,25,42,178 'rate':94,176 'report':190 'request':83,118,157 'request/response':216 'requir':98 'respond':104 'return':120 'schema':217 'sentiment':182 'settl':16,34,124 'show':208 'specif':220 'specifi':132 'standard':107 'stock':5,23 'stock price API' 'stock-market-quote' 'subscript':97 'suit':62 'summar':184 'symbol':46 'ticker':45 'time':207 'token':177 'unit':149 'usd':88 'usdc':18,36,87,136 'usdc-settlement' 'use':135 'util':69,195 'valid':197 'via':12,30,73 'wallet':212 'wide':165 'without':113 'x402':13,31,75,108,141 'x402 finance API' 'x402-payment'","prices":[{"id":"2c778423-ba89-4d0b-a8bd-c8e23c705e9d","listingId":"094fdaa0-7a43-444f-82ec-4a65de08a2e2","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/APD","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:15.661Z"}],"sources":[{"listingId":"094fdaa0-7a43-444f-82ec-4a65de08a2e2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/APD","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:15.661Z","lastSeenAt":"2026-04-22T10:30:53.827Z"}],"details":{"listingId":"094fdaa0-7a43-444f-82ec-4a65de08a2e2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/APD \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/market/quote/APD"},{"claim":"All APIs on the platform cost $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/market/quote/APD"}],"useCases":["Fetching a real-time or near-real-time market quote for APD (Air Products & Chemicals)","Integrating stock quote data into an AI agent workflow without managing API keys","On-demand market data retrieval with per-call USDC micropayments on Base"],"bestFor":["Agents or bots that need occasional stock quotes without subscription overhead","Developers wanting keyless, pay-as-you-go access to market data","Web3-native applications that can settle payments on the Base network"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk data","Users who need comprehensive historical market data or full order-book depth","Anyone without a Base-compatible wallet or USDC balance"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:18:35.524Z"},"updatedAt":"2026-04-22T10:30:53.827Z"}}