{"id":"c80b6c2e-bc12-47c1-a2bb-9f8bee1db406","shortId":"342xfX","kind":"x402","title":"Real-time stock price data for AXP (American Express) via x402 micropayment on Base.","tagline":"Real-time stock price data for AXP (American Express) via x402 micropayment on Base.","description":"This endpoint returns the current stock price for American Express (ticker: AXP) through the lowpaymentfee.com platform. It uses the x402 payment protocol, settling in USDC on the Base network. Each request costs $0.02 (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 provider, lowpaymentfee.com, offers a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services, all priced uniformly at $0.02 per request. This specific endpoint sits under the finance category and serves stock price data. The response MIME type is application/json. The endpoint accepts POST requests.\n\nDocumentation beyond the landing page 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 spec, no example request/response payloads, and no description of the response schema. The endpoint is confirmed live (returns a proper 402 challenge), but the exact shape of the returned stock price JSON is unknown.","tags":[],"capabilities":["stock-price","real-time-market-data","x402-payment","usdc-settlement","base-network","per-call-micropayment","no-api-key"],"categories":["finance","market-data"],"synonyms":["stock quote API","AXP stock price","American Express share price","equity price feed","stock market data","x402 finance API","pay-per-call stock API"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","All doc pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content","No example request or response payloads are available to verify output structure","The specific stock data source and update frequency are undisclosed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/AXP/price","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/AXP/price","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and all documentation pages are empty beyond a wallet-connect prompt. The listing is largely inferred from the URL path and landing 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'/docs':158 '/pricing':159 '/readme':162 '0.02':63,122 '000':65 '20':64 '402':200 '6':71 'AXP stock price' 'American Express share price' 'accept':146 'ai/ml':111 'american':9,24,39 'analyt':110 'api':74,107 'application/json':143 'attach':83 'axp':8,23,42 'base':15,30,58,66 'base-network' 'beyond':150 'broad':100 'call':106 'caller':81 'catalog':101 'categori':132 'challeng':201 'confirm':195 'connect':168 'cost':62 'crypto':114 'current':35 'data':6,21,109,137 'decim':72 'descript':187 'detail':175 'document':149 'endpoint':32,127,145,193 'equity price feed' 'exact':204 'exampl':182 'express':10,25,40 'extrem':155 'financ':113,131 'header':88 'infer':112 'json':211 'key':75 'land':152 'limit':78 'live':196 'lowpaymentfee.com':45,97 'micropay':13,28 'mime':140 'network':59 'no-api-key' 'offer':98 'openapi':179 'page':153,163 'pay':104 'pay-per-cal':103 'pay-per-call stock API' 'payload':184 'payment':51,87,93 'per':105,123 'per-call-micropayment' 'platform':46 'post':147 'price':5,20,37,119,136,210 'prompt':170 'proof':94 'proper':199 'protocol':52 'provid':96 'rate':77 'real':2,17 'real-tim':1,16 'real-time-market-data' 'render':165 'request':61,124,148 'request/response':183 'requir':80 'respons':139,190 'return':33,197,208 'schema':191 'serv':134 'servic':117 'settl':53 'shape':205 'simpli':82 'sit':128 'span':108 'spars':156 'spec':180 'specif':126 'stock':4,19,36,135,209 'stock market data' 'stock quote API' 'stock-price' 'technic':174 'ticker':41 'time':3,18 'type':141 'uniform':120 'unit':67 'unknown':213 'usdc':55,69 'usdc-settlement' 'use':48 'util':116 'valid':91 'via':11,26 'wallet':169 'x':86 'x-payment':85 'x402':12,27,50,92 'x402 finance API' 'x402-payment'","prices":[{"id":"361fc956-c4c3-46b7-ba7a-e78e91fa9e39","listingId":"c80b6c2e-bc12-47c1-a2bb-9f8bee1db406","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/AXP/price","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:31.309Z"}],"sources":[{"listingId":"c80b6c2e-bc12-47c1-a2bb-9f8bee1db406","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/AXP/price","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:31.309Z","lastSeenAt":"2026-04-22T09:00:35.212Z"}],"details":{"listingId":"c80b6c2e-bc12-47c1-a2bb-9f8bee1db406","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/AXP/price \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -H \"Content-Type: application/json\"","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 network at maxAmountRequired 20000","source_url":"https://lowpaymentfee.com/api/v1/stocks/AXP/price"},{"claim":"Platform pricing is $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 address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stocks/AXP/price"}],"useCases":["Fetching the current American Express (AXP) stock price in an automated trading or analytics pipeline","Agents that need on-demand equity price lookups without managing API keys or subscriptions","Building dashboards or alerts that pull live stock prices with micropayment settlement"],"bestFor":["AI agents needing keyless, pay-per-call stock price data","Developers prototyping finance apps who want instant access without signup","x402-native workflows on the Base network"],"notFor":["Bulk historical stock data retrieval (single-ticker, single-price endpoint)","Users who need comprehensive market data (options, volume, fundamentals) — only price is indicated","Non-crypto users who cannot settle USDC payments on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.487Z"},"updatedAt":"2026-04-22T09:00:35.212Z"}}