{"id":"752a4ae9-dee6-458b-997f-6c717be5c9be","shortId":"SLChmd","kind":"x402","title":"Stock market quote for AXP (American Express) via x402 micropayment on Base, $0.02 per request.","tagline":"Stock market quote for AXP (American Express) via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides a stock market quote for the ticker symbol AXP (American Express) through the x402 payment protocol. It is part of a broader suite of APIs offered by lowpaymentfee.com, which spans data analytics, AI/ML inference, finance, crypto, and utility services — all gated behind x402 micropayments settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/market/quote/AXP` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The provider advertises flat $0.02/request pricing across all endpoints with no API keys, no rate limits, and no minimum commitments.\n\nDocumentation is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no example request/response payloads, and no description of the response format. The endpoint is confirmed live (returns a valid 402 challenge), but the actual data source, response schema, and data freshness/quality are unknown. Use with caution until more documentation becomes available.","tags":[],"capabilities":["stock-quote","market-data","x402-payment","usdc-micropayment","base-network","per-request-pricing","no-api-key"],"categories":["finance","market-data"],"synonyms":["stock quote API","AXP quote","American Express stock price","equity market data","ticker quote","stock price lookup","x402 finance API"],"warnings":["No documentation available — all doc pages render only 'Connect wallet'","No OpenAPI or output schema provided; response format is unknown","Data source and freshness for stock quotes are not disclosed","The endpoint path suggests ticker-specific routing (/quote/AXP) but no details on supported tickers or parameters"],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/AXP","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/AXP","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","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 example request/response, and all documentation pages are empty stubs ('Connect wallet'). The actual response format and data source are completely unknown, making this effectively a stub 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'/request':127 '0.02':13,28,115,126 '000':104 '0x8335':109 '20':103 '2913':110 '402':189 '6':120 'AXP quote' 'American Express stock price' 'accept':89 'across':129 'actual':193 'advertis':98,124 'ai/ml':66 'american':6,21,43 'analyt':65 'api':58,134,150 'avail':210 'axp':5,20,42 'base':12,27,83,105,112 'base-network' 'becom':209 'behind':75 'broader':55 'caution':205 'challeng':97,190 'commit':142 'confirm':184 'connect':158 'content':164 'cost':101 'crypto':69 'data':64,194,199 'decim':121 'descript':176 'doc':148 'document':143,208 'endpoint':32,87,131,182 'equal':114 'equity market data' 'exampl':171 'express':7,22,44 'extrem':145 'financ':68 'flat':125 'format':180 'freshness/quality':200 'gate':74 'infer':67 'json':94 'key':135 'limit':138 'live':185 'lowpaymentfee.com':61 'market':2,17,36 'market-data' 'maximum':100 'micropay':10,25,77 'minimum':141 'network':84 'no-api-key' 'offer':59 'openapi':168 'page':153 'part':52 'payload':173 'payment':48 'per':14,29,116 'per-request-pricing' 'post':90 'price':128,149 'prompt':160 'protocol':49 'provid':33,123 'quot':3,18,37 'rate':137 'readm':152 'render':155 'request':15,30,91,117 'request/response':172 'respons':179,196 'return':93,186 'schema':169,197 'servic':72 'settl':78 'sourc':195 'span':63 'spars':146 'specif':86 'stock':1,16,35 'stock price lookup' 'stock quote API' 'stock-quote' 'substant':163 'suit':56 'symbol':41 'ticker':40 'ticker quote' 'unit':106 'unknown':202 'usdc':80,108,118 'usdc-micropayment' 'use':119,203 'util':71 'valid':188 'via':8,23 'wallet':159 'x402':9,24,47,76,96 'x402 finance API' 'x402-payment'","prices":[{"id":"8c5cb47a-890f-47d5-8136-879ce8019671","listingId":"752a4ae9-dee6-458b-997f-6c717be5c9be","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/AXP","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:48.390Z"}],"sources":[{"listingId":"752a4ae9-dee6-458b-997f-6c717be5c9be","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/AXP","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:48.390Z","lastSeenAt":"2026-04-22T10:01:10.736Z"}],"details":{"listingId":"752a4ae9-dee6-458b-997f-6c717be5c9be","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/AXP \\\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 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/market/quote/AXP"},{"claim":"The 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":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/market/quote/AXP"}],"useCases":["Fetching a real-time or recent stock quote for American Express (AXP)","Programmatic market data retrieval without API key registration","Agent-driven portfolio monitoring that pays per call via x402"],"bestFor":["Agents or bots needing quick stock quotes without signup","x402-native workflows that settle micropayments in USDC on Base","Low-volume, pay-as-you-go market data consumption"],"notFor":["High-frequency trading requiring guaranteed low-latency feeds with SLAs","Users who need documented response schemas and reliability guarantees","Bulk historical market data downloads"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:17:09.617Z"},"updatedAt":"2026-04-22T10:01:10.736Z"}}