{"id":"e21c9210-a736-40db-afec-b8329d659535","shortId":"7VbvVY","kind":"x402","title":"Pay-per-call stock market quote for MSFT via x402 on Base, settled in USDC.","tagline":"Pay-per-call stock market quote for MSFT via x402 on Base, settled in USDC.","description":"This endpoint provides a real-time market quote for Microsoft (MSFT) stock, accessible via the x402 payment protocol. It is part of a broader suite of paid API endpoints hosted at lowpaymentfee.com, which spans data analytics, AI/ML inference, finance, crypto, and utility services. Each call costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required.\n\nThe specific endpoint `/api/v1/market/quote/MSFT` accepts HTTP POST requests and returns JSON. Payment is handled inline: callers attach an X-PAYMENT header containing a signed x402 payment voucher for 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals). The payment is settled on-chain to the provider's address on Base. The x402 challenge confirms the endpoint is live and discoverable.\n\nDocumentation beyond the landing page is sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of the response schema. The endpoint appears functional based on the 402 challenge, but the exact fields returned in a successful quote response are unknown.","tags":[],"capabilities":["stock-quote","market-data","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key"],"categories":["finance","market-data"],"synonyms":["MSFT stock quote","Microsoft stock price","equity quote API","stock market data","real-time stock quote","x402 finance API"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","All doc/pricing/README pages return only a 'Connect wallet' prompt with no technical content","No example responses or field descriptions for the quote endpoint","The endpoint path suggests ticker-specific routing (MSFT), but it is unclear whether other tickers are supported or what the full path pattern is"],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/MSFT","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/MSFT","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 confirms pricing and network details, but there is no OpenAPI spec, no documented request/response schema, and all documentation pages render only a wallet-connect prompt. The actual response format for a successful call is entirely 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'/api/v1/market/quote/msft':100 '/docs':171 '/pricing':172 '/readme':175 '0.02':80,133 '000':127 '20':126 '402':212 '6':137 'MSFT stock quote' 'Microsoft stock price' 'accept':101 'access':46 'addit':186 'address':150 'ai/ml':70 'analyt':69 'api':61,88 'appear':207 'attach':113 'base':13,29,85,128,152,209 'base-network' 'beyond':164 'broader':57 'call':4,20,78 'caller':112 'chain':145 'challeng':155,213 'confirm':156 'connect':181 'contain':119 'cost':79 'crypto':73 'data':68 'decim':138 'descript':200 'detail':188 'discover':162 'document':163 'endpoint':34,62,99,158,206 'equity quote API' 'exact':216 'exampl':195 'field':217 'financ':72 'function':208 'handl':110 'header':118 'host':63 'http':102 'i.e':132 'infer':71 'inlin':111 'json':107 'key':89 'land':166 'limit':92 'live':160 'lowpaymentfee.com':65 'market':6,22,40 'market-data' 'microsoft':43 'msft':9,25,44 'network':86 'no-api-key' 'on-chain':143 'openapi':192 'page':167,176 'paid':60 'part':54 'pay':2,18 'pay-per-cal':1,17 'pay-per-call' 'payload':197 'payment':50,108,117,123,140 'per':3,19 'post':103 'prompt':183 'protocol':51 'provid':35,148 'quot':7,23,41,222 'rate':91 'real':38 'real-tim':37 'real-time stock quote' 'render':178 'request':104 'request/response':196 'requir':96 'respons':203,223 'return':106,218 'schema':204 'servic':76 'settl':14,30,142 'sign':121 'sinc':134 'span':67 'spars':169 'spec':193 'specif':98 'stock':5,21,45 'stock market data' 'stock-quote' 'subscript':95 'success':221 'suit':58 'technic':187 'time':39 'unit':129 'unknown':225 'usdc':16,32,82,131,135 'usdc-settlement' 'use':136 'util':75 'via':10,26,47 'voucher':124 'wallet':182 'x':116 'x-payment':115 'x402':11,27,49,122,154 'x402 finance API' 'x402-payment'","prices":[{"id":"188d3e51-3b15-44f1-8002-777f7d0ce53d","listingId":"e21c9210-a736-40db-afec-b8329d659535","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/MSFT","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:35.563Z"}],"sources":[{"listingId":"e21c9210-a736-40db-afec-b8329d659535","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/MSFT","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:35.563Z","lastSeenAt":"2026-04-22T10:30:54.840Z"}],"details":{"listingId":"e21c9210-a736-40db-afec-b8329d659535","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/MSFT \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_voucher>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/market/quote/MSFT"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/market/quote/MSFT"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"The provider offers endpoints across data analytics, AI/ML, finance, crypto, and utility categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching a real-time Microsoft stock quote from an AI agent without pre-registering for an API key","Integrating pay-per-call equity data into a trading bot that settles micropayments in USDC on Base","Building a portfolio dashboard that pulls individual stock quotes on demand"],"bestFor":["Agents or bots that need on-demand stock quotes without subscription overhead","Developers experimenting with x402 micropayment-gated APIs","Use cases requiring keyless, permissionless access to market data"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk data feeds","Users who need historical OHLCV data or full market depth","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:46:19.952Z"},"updatedAt":"2026-04-22T10:30:54.840Z"}}