{"id":"4efbe7c4-e762-4fbb-a79a-140d089a26d7","shortId":"FDtH2Q","kind":"x402","title":"Pay-per-call stock market quote for AMZN via x402 on Base, settled in USDC.","tagline":"Pay-per-call stock market quote for AMZN via x402 on Base, settled in USDC.","description":"This endpoint at lowpaymentfee.com provides a market quote for AMZN (Amazon) stock via a simple POST request, paid per-call using the x402 protocol. The payment is settled on the Base network in USDC (USD Coin) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or accounts are required — callers attach an X-PAYMENT header with a valid x402 payment proof and receive a JSON response.\n\nThe provider, lowpaymentfee.com, hosts 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 falls under the Finance & Web3 category and returns a market quote for the AMZN ticker. The x402 challenge confirms the endpoint is live and accepting payments to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 on Base.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of the response format beyond the stated mimeType of application/json. The endpoint's actual response fields (bid, ask, last price, volume, etc.) are unknown and must be discovered by making a paid call.","tags":[],"capabilities":["stock-quote","market-data","x402-payment","usdc-settlement","base-network","per-call-pricing","no-api-key"],"categories":["finance","market-data"],"synonyms":["AMZN stock quote","Amazon stock price API","stock market quote API","x402 finance API","pay-per-call stock data","Base USDC market data","real-time stock quote"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or JSON schema describing request parameters or response fields.","Response format for the AMZN quote endpoint is entirely unknown; example_request_json and example_response_json cannot be provided.","The provider lists many endpoints at uniform $0.02 pricing with no visible differentiation in documentation quality."],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/AMZN","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/AMZN","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 payment details, but there is zero documentation on request parameters or response schema. Docs pages are empty stubs. No OpenAPI spec, no examples, and the actual data returned is 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'000':78 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':170 '20':77 '6':82 'AMZN stock quote' 'Amazon stock price API' 'Base USDC market data' 'accept':166 'account':88 'actual':221 'address':169 'ai/ml':125 'amazon':43 'amzn':9,25,42,155 'analyt':124 'api':85,121,179 'application/json':217 'ask':225 'attach':92 'base':13,29,64,79,172 'base-network' 'beyond':212 'bid':224 'broad':114 'call':4,20,53,120,240 'caller':91 'catalog':115 'categori':147 'challeng':159 'coin':69 'confirm':160 'connect':188 'cost':72 'crypto':128 'data':123 'decim':83 'descript':207 'detail':195 'discov':235 'doc':178 'document':173 'endpoint':34,141,162,219 'etc':229 'exampl':202 'extrem':175 'fall':142 'field':223 'financ':127,145 'format':211 'header':97 'host':112 'infer':126 'json':107 'key':86 'last':226 'live':164 'lowpaymentfee.com':36,111 'make':237 'market':6,22,39,151 'market-data' 'mimetyp':215 'must':233 'network':65 'no-api-key' 'openapi':199 'page':183 'paid':50,239 'pay':2,18,118 'pay-per-cal':1,17,117 'pay-per-call stock data' 'payload':204 'payment':59,96,102,167 'per':3,19,52,75,119,137 'per-cal':51 'per-call-pricing' 'post':48 'price':133,180,227 'prompt':190 'proof':103 'protocol':57 'provid':37,110 'quot':7,23,40,152 'readm':182 'real-time stock quote' 'receiv':105 'render':185 'request':49,76,138 'request/response':203 'requir':90 'respons':108,210,222 'return':149 'schema':200 'servic':131 'settl':14,30,61 'simpl':47 'span':122 'spars':176 'specif':140 'state':214 'stock':5,21,44 'stock market quote API' 'stock-quote' 'technic':194 'ticker':156 'uniform':134 'unit':80 'unknown':231 'usd':68 'usdc':16,32,67 'usdc-settlement' 'use':54 'util':130 'valid':100 'via':10,26,45 'volum':228 'wallet':189 'web3':146 'x':95 'x-payment':94 'x402':11,27,56,101,158 'x402 finance API' 'x402-payment'","prices":[{"id":"45117762-2977-4694-87ac-c48fdc466269","listingId":"4efbe7c4-e762-4fbb-a79a-140d089a26d7","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/AMZN","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:45.989Z"}],"sources":[{"listingId":"4efbe7c4-e762-4fbb-a79a-140d089a26d7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/AMZN","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:45.989Z","lastSeenAt":"2026-04-22T10:01:10.616Z"}],"details":{"listingId":"4efbe7c4-e762-4fbb-a79a-140d089a26d7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/AMZN \\\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":"The endpoint returns HTTP 402 with an x402 challenge advertising USDC payment on Base network at 20,000 base units (~$0.02).","source_url":"https://lowpaymentfee.com/api/v1/market/quote/AMZN"},{"claim":"The provider lists uniform $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/AMZN"},{"claim":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt with no additional content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching a current market quote for Amazon (AMZN) stock in an automated trading or monitoring agent","Integrating real-time stock data into an AI agent workflow without managing API keys","Paying for individual stock data lookups on-demand using crypto micropayments"],"bestFor":["Agents that need occasional AMZN stock quotes without subscription overhead","Developers prototyping x402-based finance data pipelines","Crypto-native applications that prefer on-chain payment settlement"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk data","Users who need historical stock data or full order-book depth","Anyone without a Base-network USDC wallet or x402 client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:16:54.378Z"},"updatedAt":"2026-04-22T10:01:10.616Z"}}