{"id":"7c2d6cfb-6c25-4682-a324-b3edf1dd4c37","shortId":"P5dkJk","kind":"x402","title":"Historical stock data for EMR via x402 micropayment on Base, $0.02 per request.","tagline":"Historical stock data for EMR via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides historical stock data for the ticker EMR (Emerson Electric) through the lowpaymentfee.com platform. It is part of a broader suite of pay-per-request APIs covering finance, analytics, AI/ML, and infrastructure utilities. The endpoint is accessed via HTTP POST and is gated by the x402 payment protocol, settling in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts payments of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per request. No API keys or rate limits are advertised — access is granted purely through per-call micropayment. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 and the response MIME type is application/json.\n\nDocumentation is extremely sparse. The crawled docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of the data fields returned by the history endpoint. The specific input parameters (e.g., date range, interval) and output schema (e.g., OHLCV candles, adjusted close) are unknown. The endpoint URL embeds the ticker symbol (EMR), suggesting other tickers may be available at similar paths, but this is not confirmed.","tags":[],"capabilities":["stock-history","per-request-micropayment","x402-protocol","usdc-base-settlement","json-response"],"categories":["finance","data"],"synonyms":["stock price history","EMR historical data","Emerson Electric stock","equity history API","stock OHLCV","stock market data","x402 stock API","micropayment stock data"],"warnings":["No API documentation available — docs, pricing, and API pages all render only a wallet-connect prompt","No OpenAPI or JSON schema describing request parameters or response format","Unknown what historical data fields are returned (dates, OHLCV, adjusted prices, etc.)","It is unclear whether other stock tickers are supported at similar paths","No information on data source, update frequency, or data quality"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/EMR/history","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/EMR/history","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no description of what fields the history endpoint returns. Effectively a stub 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'000':100 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':137 '20':99 '6':110 'EMR historical data' 'Emerson Electric stock' 'accept':94 'access':66,122 'address':136 'adjust':201 'advertis':121 'ai/ml':59 'analyt':58 'api':55,115,154 'application/json':144 'avail':218 'base':10,23,83,101 'broader':48 'call':129 'candl':200 'challeng':87 'close':202 'confirm':88,226 'connect':160 'content':166 'cover':56 'crawl':150 'data':3,16,32,180 'date':192 'decim':111 'descript':177 'doc':151 'document':145 'e.g':191,198 'electr':38 'emb':208 'emerson':37 'emr':5,18,36,212 'endpoint':28,64,90,186,206 'equity history API' 'exampl':174 'extrem':147 'field':181 'financ':57 'gate':72 'grant':124 'histor':1,14,30 'histori':185 'http':68 'infrastructur':61 'input':189 'interv':194 'json-response' 'key':116 'limit':119 'live':92 'lowpaymentfee.com':41 'may':216 'micropay':8,21,130 'micropayment stock data' 'mime':141 'network':84 'ohlcv':199 'openapi':170 'output':196 'page':155 'paramet':190 'part':45 'path':221 'pay':52 'pay-per-request':51 'payment':76,95,132 'per':12,25,53,112,128 'per-cal':127 'per-request-micropayment' 'platform':42 'post':69 'price':152 'prompt':162 'protocol':77 'provid':29 'pure':125 'rang':193 'rate':118 'request':13,26,54,113 'request/response':173 'respons':140 'return':157,182 'schema':171,197 'sent':134 'settl':78 'similar':220 'sinc':107 'spars':148 'specif':188 'stock':2,15,31 'stock OHLCV' 'stock market data' 'stock price history' 'stock-history' 'suggest':213 'suit':49 'symbol':211 'ticker':35,210,215 'type':142 'unit':102 'unknown':204 'url':207 'usd':106 'usdc':80,104,108 'usdc-base-settlement' 'use':109 'util':62 'via':6,19,67 'wallet':161 'x402':7,20,75,86 'x402 stock API' 'x402-protocol'","prices":[{"id":"2e4dea5c-b718-4ec7-aba8-042bd7bf64ae","listingId":"7c2d6cfb-6c25-4682-a324-b3edf1dd4c37","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/EMR/history","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:56.167Z"}],"sources":[{"listingId":"7c2d6cfb-6c25-4682-a324-b3edf1dd4c37","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/EMR/history","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:56.167Z","lastSeenAt":"2026-04-29T14:33:37.812Z"}],"details":{"listingId":"7c2d6cfb-6c25-4682-a324-b3edf1dd4c37","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/EMR/history \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_header>\"","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/stocks/EMR/history"},{"claim":"Pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stocks/EMR/history"}],"useCases":["Retrieving historical price data for Emerson Electric (EMR) stock","Integrating stock history into automated trading or analysis agents","Pay-per-call access to financial data without API key registration","Agent-driven portfolio backtesting using historical equity prices"],"bestFor":["Agents needing on-demand stock history without subscription commitments","Developers prototyping financial tools with minimal setup","x402-compatible clients on the Base network"],"notFor":["Bulk historical data downloads across many tickers (no batch endpoint documented)","Real-time streaming stock quotes","Users who need detailed API documentation or guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:49.333Z"},"updatedAt":"2026-04-29T14:33:37.812Z"}}