{"id":"81cf9232-e879-41ac-afe3-ae9b7d4e692a","shortId":"JNwzw8","kind":"x402","title":"Historical stock data for TXN (and other tickers) via x402 micropayment on Base, $0.02/request.","tagline":"Historical stock data for TXN (and other tickers) via x402 micropayment on Base, $0.02/request.","description":"This endpoint provides historical stock price data for the ticker TXN (Roper Technologies / Texas Instruments — ticker context not specified) through the lowpaymentfee.com platform. It is part of a broader suite of pay-per-request APIs covering finance, analytics, AI/ML, and utilities, all settled via the x402 protocol on the Base network using USDC.\n\nThe endpoint accepts POST requests and returns JSON. Payment is handled inline via the X-PAYMENT header using the x402 exact-payment scheme. The maximum amount required per call is 20,000 base units of USDC (0x8335…0913 on Base), which equals $0.02 USD (USDC uses 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each request is independently paid for at the time of the call.\n\nDocumentation beyond the landing page is extremely sparse. The /docs, /pricing, /api, and /README pages all resolve to a wallet-connect stub with no additional content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled material. The endpoint is confirmed live (returns a valid 402 challenge), but the exact request body format and response structure for historical stock data must be inferred or discovered experimentally.","tags":[],"capabilities":["stock-history","financial-data","x402-payment","usdc-settlement","base-network","per-request-pricing","no-api-key"],"categories":["finance","data"],"synonyms":["stock price history","historical stock data","TXN stock","equity price API","stock market data","x402 finance API","micropayment stock API"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all return empty wallet-connect stubs","No OpenAPI or request/response schema provided; request format must be guessed","The specific stock ticker 'TXN' is in the URL but it is unclear what date ranges or parameters are supported","The broader lowpaymentfee.com platform lists many diverse endpoints; quality and data sources are unverified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/TXN/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/TXN/history","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no usage examples, and all documentation pages are empty stubs. The request body format and response structure are entirely 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'/docs':168 '/pricing':169 '/readme':172 '/request':15,30 '0.02':14,29,129 '000':118 '0913':124 '0x8335':123 '20':117 '402':211 '6':133 'TXN stock' 'accept':87 'addit':184 'ai/ml':70 'amount':112 'analyt':69 'api':66,138 'avail':198 'base':13,28,81,119,126 'base-network' 'beyond':160 'bodi':217 'broader':59 'call':115,158 'challeng':212 'commit':146 'confirm':206 'connect':180 'content':185 'context':47 'cover':67 'crawl':201 'data':3,18,37,225 'decim':134 'discov':230 'document':159 'endpoint':32,86,204 'equal':128 'equity price API' 'exact':107,215 'exact-pay':106 'exampl':197 'experiment':231 'extrem':165 'financ':68 'financial-data' 'format':218 'handl':95 'header':102 'histor':1,16,34,223 'historical stock data' 'independ':150 'infer':228 'inlin':96 'instrument':45 'json':92 'key':139 'land':162 'limit':142 'live':207 'lowpaymentfee.com':52 'materi':202 'maximum':111 'micropay':11,26 'micropayment stock API' 'must':226 'network':82 'no-api-key' 'openapi':189 'page':163,173 'paid':151 'part':56 'pay':63 'pay-per-request':62 'payment':93,101,108 'per':64,114 'per-request-pricing' 'platform':53 'post':88 'price':36 'protocol':78 'provid':33 'rate':141 'request':65,89,148,216 'request/response':192 'requir':113 'resolv':175 'respons':220 'return':91,208 'roper':42 'schema':193 'scheme':109 'settl':74 'spars':166 'spec':190 'specifi':49 'stock':2,17,35,224 'stock market data' 'stock price history' 'stock-history' 'structur':221 'stub':181 'subscript':145 'suit':60 'technolog':43 'texa':44 'ticker':8,23,40,46 'time':155 'txn':5,20,41 'unit':120 'usag':196 'usd':130 'usdc':84,122,131 'usdc-settlement' 'use':83,103,132 'util':72 'valid':210 'via':9,24,75,97 'wallet':179 'wallet-connect':178 'x':100 'x-payment':99 'x402':10,25,77,105 'x402 finance API' 'x402-payment'","prices":[{"id":"7ed31915-480d-4c5d-b60c-04199f5914ff","listingId":"81cf9232-e879-41ac-afe3-ae9b7d4e692a","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/TXN/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":"2026-04-18T18:32:50.423Z"}],"sources":[{"listingId":"81cf9232-e879-41ac-afe3-ae9b7d4e692a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/TXN/history","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:50.423Z","lastSeenAt":"2026-04-29T23:04:25.910Z"}],"details":{"listingId":"81cf9232-e879-41ac-afe3-ae9b7d4e692a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/TXN/history \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":{},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stocks/TXN/history"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stocks/TXN/history"}],"useCases":["Retrieve historical price data for TXN stock for backtesting or analysis","Build automated trading or research agents that pay per data request without subscriptions","Integrate stock history lookups into AI agent workflows using x402 micropayments"],"bestFor":["AI agents needing on-demand stock history without API key management","Developers prototyping financial tools with pay-per-use pricing","Low-volume or bursty stock data consumers who want no commitments"],"notFor":["High-frequency trading requiring sub-second latency and bulk data","Users needing comprehensive multi-ticker historical datasets in a single call","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:58.504Z"},"updatedAt":"2026-04-29T23:04:25.910Z"}}