{"id":"86013234-32e3-4fc2-a5fc-a1593824f45e","shortId":"nprTr2","kind":"x402","title":"Pay-per-call stock data for UNH (UnitedHealth Group) via x402 on Base, settled in USDC.","tagline":"Pay-per-call stock data for UNH (UnitedHealth Group) via x402 on Base, settled in USDC.","description":"This endpoint at lowpaymentfee.com provides stock data for UnitedHealth Group (ticker: UNH) through an x402 payment-gated API. Each request costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required. The endpoint accepts POST requests and returns JSON.\n\nThe provider, lowpaymentfee.com, hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/crypto market data, and utility services, all priced uniformly at $0.02 per request. This specific endpoint sits under the finance category and serves stock-level data for the UNH ticker. However, documentation is extremely thin: the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further detail on request parameters, response schema, or data sources.\n\nBecause there is no published request or response schema, callers will need to experiment with the POST body to discover accepted parameters and the shape of the returned data. The x402 challenge is live and well-formed, confirming the endpoint is operational and ready to accept payments. The asset used for payment is USDC (contract 0x8335…2913 on Base), and the maximum amount required per call is 20,000 base units, which equals $0.02 (USDC uses 6 decimals).","tags":[],"capabilities":["stock-data","x402-payment","usdc-settlement","base-network","per-call-pricing","no-api-key","json-response"],"categories":["finance","data"],"synonyms":["stock price API","UNH stock data","UnitedHealth Group API","equity data endpoint","stock market API","pay-per-call stock API","x402 stock data"],"warnings":["No request or response schema documented — callers must discover parameters experimentally","Docs, pricing, and API pages render only 'Connect wallet' with no useful content","Data source for stock information is unknown; accuracy and freshness cannot be verified","The specific /stocks/UNH path is not listed on the provider's homepage catalog, raising questions about its discoverability and support status"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/UNH","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/UNH","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 pricing is clear ($0.02 USDC on Base), but there is no documentation on request parameters, response schema, or data sources. The docs/pricing/API pages are empty beyond a wallet-connect prompt, making this effectively a stub 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'000':230 '0x8335':217 '20':229 '2913':218 '6':238 'UNH stock data' 'UnitedHealth Group API' 'accept':76,181,207 'ai/ml':98 'amount':224 'analyt':97 'api':53,65,94,140 'asset':210 'base':14,31,62,220,231 'base-network' 'bodi':178 'broad':87 'call':4,21,93,227 'caller':170 'catalog':88 'categori':120 'challeng':192 'confirm':199 'connect':146 'contract':216 'cost':56 'data':6,23,41,96,102,126,159,189 'decim':239 'detail':152 'discov':180 'doc':137 'document':132 'endpoint':36,75,115,201 'equal':234 'equity data endpoint' 'experi':174 'extrem':134 'financ':119 'finance/crypto':100 'form':198 'gate':52 'group':10,27,44 'host':85 'howev':131 'infer':99 'json':81 'json-response' 'key':66 'level':125 'limit':69 'live':194 'lowpaymentfee.com':38,84 'market':101 'maximum':223 'need':172 'network':63 'no-api-key' 'oper':203 'page':141 'paramet':155,182 'pay':2,19,91 'pay-per-cal':1,18,90 'pay-per-call stock API' 'payment':51,208,213 'payment-g':50 'per':3,20,92,111,226 'per-call-pricing' 'post':77,177 'price':107,138 'prompt':148 'provid':39,83 'publish':165 'rate':68 'readi':205 'render':143 'request':55,78,112,154,166 'requir':73,225 'respons':156,168 'return':80,188 'schema':157,169 'serv':122 'servic':105 'settl':15,32 'shape':185 'sit':116 'sourc':160 'span':95 'specif':114 'stock':5,22,40,124 'stock market API' 'stock price API' 'stock-data' 'stock-level':123 'subscript':72 'thin':135 'ticker':45,130 'unh':8,25,46,129 'uniform':108 'unit':232 'unitedhealth':9,26,43 'usdc':17,34,59,215,236 'usdc-settlement' 'use':211,237 'util':104 'via':11,28 'wallet':147 'well':197 'well-form':196 'x402':12,29,49,191 'x402 stock data' 'x402-payment'","prices":[{"id":"a3272f86-b738-4f7e-a074-50d414a8039a","listingId":"86013234-32e3-4fc2-a5fc-a1593824f45e","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/UNH","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:17.427Z"}],"sources":[{"listingId":"86013234-32e3-4fc2-a5fc-a1593824f45e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/UNH","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:17.427Z","lastSeenAt":"2026-04-23T20:01:25.872Z"}],"details":{"listingId":"86013234-32e3-4fc2-a5fc-a1593824f45e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/UNH \\\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 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stocks/UNH"},{"claim":"All APIs on the platform are priced at $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 contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stocks/UNH"}],"useCases":["Retrieving current or recent stock data for UnitedHealth Group (UNH)","Building trading bots or dashboards that need on-demand equity data without subscriptions","Agent-driven financial research workflows that pay per query in USDC"],"bestFor":["Developers who want subscription-free, pay-as-you-go stock data","AI agents with Base-network USDC wallets needing equity information","Quick one-off lookups of UNH stock information without credential management"],"notFor":["Bulk historical stock data downloads (no documented batch endpoint)","Users who need detailed API documentation or guaranteed SLAs","Non-crypto users who cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:20:17.793Z"},"updatedAt":"2026-04-23T20:01:25.872Z"}}