{"id":"3dbfdea7-92a5-41a4-9023-d95dd7495e33","shortId":"uLr4YD","kind":"x402","title":"Pay-per-call stock market quote for AAPL via x402 on Base, settled in USDC.","tagline":"Pay-per-call stock market quote for AAPL via x402 on Base, settled in USDC.","description":"This endpoint at lowpaymentfee.com provides a real-time market quote for AAPL (Apple Inc.) stock. It is part of a broader suite of pay-per-request APIs offered by the same provider, spanning finance, AI/ML, data analytics, and utility services. The endpoint uses the x402 payment protocol on the Base network, accepting USDC payments at $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe specific endpoint path `/api/v1/market/quote/AAPL` suggests a REST pattern where the ticker symbol is a path parameter, meaning other stock symbols may be available at similar paths (e.g., `/api/v1/market/quote/MSFT`). The endpoint accepts POST requests and returns JSON. However, no detailed documentation of the response schema, supported ticker symbols, or data sources is available from the crawled material. The docs, pricing, and API pages all appear to require wallet connection and contain no additional technical content.\n\nThe provider's landing page lists a flat $0.02/request pricing model across all endpoints, with no minimums, no commitments, and no API keys. Settlement occurs on the Base L2 network using USDC (contract 0x8335…2913). The x402 challenge was successfully captured, confirming the endpoint is live and operational.","tags":[],"capabilities":["stock-quote","market-data","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key","json-response"],"categories":["finance","market-data"],"synonyms":["AAPL stock quote","Apple stock price","stock market API","equity quote API","real-time stock data","market quote endpoint","stock ticker API"],"warnings":["No response schema or example response available — actual output format is unknown","Documentation pages (docs, pricing, API, README) are all behind a wallet-connect gate and contain no useful content","Supported ticker symbols beyond AAPL are not documented","Data source and freshness/latency of quotes are unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/AAPL","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/AAPL","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The x402 challenge is live and confirms pricing and network details. However, there is no OpenAPI schema, no response examples, no documentation of supported tickers or response fields, and the docs/pricing/API pages are empty (wallet-gated). The listing is largely inferred from the URL pattern and landing 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'/api/v1/market/quote/msft':152 '/request':208 '0.02':90,207 '000':94 '0x8335':233 '20':93 '2913':234 '6':100 'AAPL stock quote' 'Apple stock price' 'aapl':9,25,45 'accept':86,155 'across':211 'addit':196 'ai/ml':69 'analyt':71 'api':61,103,185,221 'appear':188 'appl':46 'attach':112 'avail':147,176 'base':13,29,84,95,227 'base-network' 'broader':54 'call':4,20 'caller':110 'captur':240 'challeng':237 'commit':218 'confirm':241 'connect':192 'contain':194 'content':198 'contract':232 'crawl':179 'data':70,173 'decim':101 'detail':163 'doc':182 'document':164 'e.g':151 'endpoint':34,76,126,154,213,243 'equity quote API' 'financ':68 'flat':206 'header':117 'howev':161 'inc':47 'json':160 'json-response' 'key':104,222 'l2':228 'land':202 'limit':107 'list':204 'live':245 'lowpaymentfee.com':36 'market':6,22,42 'market quote endpoint' 'market-data' 'materi':180 'may':145 'mean':141 'minimum':216 'model':210 'network':85,229 'no-api-key' 'occur':224 'offer':62 'oper':247 'page':186,203 'paramet':140 'part':51 'path':127,139,150 'pattern':132 'pay':2,18,58 'pay-per-cal':1,17 'pay-per-call' 'pay-per-request':57 'payment':80,88,116,122 'per':3,19,59,91 'post':156 'price':183,209 'proof':123 'protocol':81 'provid':37,66,200 'quot':7,23,43 'rate':106 'real':40 'real-tim':39 'real-time stock data' 'request':60,92,157 'requir':109,190 'respons':167 'rest':131 'return':159 'schema':168 'servic':74 'settl':14,30 'settlement':223 'similar':149 'simpli':111 'sourc':174 'span':67 'specif':125 'stock':5,21,48,143 'stock market API' 'stock ticker API' 'stock-quote' 'success':239 'suggest':129 'suit':55 'support':169 'symbol':136,144,171 'technic':197 'ticker':135,170 'time':41 'unit':96 'usdc':16,32,87,98,231 'usdc-settlement' 'use':77,230 'util':73 'valid':120 'via':10,26 'wallet':191 'x':115 'x-payment':114 'x402':11,27,79,121,236 'x402-payment'","prices":[{"id":"bf9eef23-f174-4fad-b902-f81b68a6ba3f","listingId":"3dbfdea7-92a5-41a4-9023-d95dd7495e33","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/AAPL","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:02.410Z"}],"sources":[{"listingId":"3dbfdea7-92a5-41a4-9023-d95dd7495e33","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/AAPL","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:02.410Z","lastSeenAt":"2026-04-22T09:00:33.831Z"}],"details":{"listingId":"3dbfdea7-92a5-41a4-9023-d95dd7495e33","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/AAPL \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge on POST, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/market/quote/AAPL"},{"claim":"Price is $0.02 per request (maxAmountRequired 20000 base units of USDC on Base)","source_url":"https://lowpaymentfee.com/api/v1/market/quote/AAPL"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/market/quote/AAPL"},{"claim":"Provider advertises $0.02/request flat pricing, no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"Provider offers finance, AI/ML, analytics, and utility endpoints","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching real-time AAPL stock quotes from an AI agent without pre-registration","Building trading bots that pay per API call with no subscription","Integrating stock price lookups into autonomous agent workflows on Base"],"bestFor":["AI agents needing on-demand stock quotes without API key management","Developers prototyping financial apps with minimal setup","Low-volume or sporadic stock price lookups at $0.02 per call"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk pricing","Users who need comprehensive historical market data or OHLCV candles","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:51.911Z"},"updatedAt":"2026-04-22T09:00:33.831Z"}}