{"id":"87f5fc62-91f4-4753-8fd3-b19c19c8b987","shortId":"Z5seNz","kind":"x402","title":"Pay-per-call stock market quote for UNH via x402 on Base (USDC).","tagline":"Pay-per-call stock market quote for UNH via x402 on Base (USDC).","description":"This endpoint at lowpaymentfee.com provides a market quote for UNH (UnitedHealth Group) via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which spans data analytics, AI/ML inference, finance, crypto, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments.\n\nThe specific endpoint `/api/v1/market/quote/UNH` accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals equals $0.02 per call — consistent with the site's stated flat pricing.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but the exact shape of the response data (e.g., bid/ask, last price, volume) is unknown and must be inferred from the endpoint path alone.","tags":[],"capabilities":["stock-market-quote","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key","json-response"],"categories":["finance","market-data"],"synonyms":["UNH stock quote","UnitedHealth Group quote","market data API","stock price API","equity quote","x402 finance API","pay-per-call stock data"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or JSON schema for request or response; response structure is completely unknown","The endpoint path suggests a stock quote for ticker UNH, but this is inferred from the URL only","No information on data source, freshness, or accuracy of the market quote"],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/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/market/quote/UNH","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 x402 challenge and consistent pricing ($0.02). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no example payloads. The actual data returned is entirely 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'0.02':71,121 '000':113 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':104 '20':112 '402':173 '6':118 'UNH stock quote' 'UnitedHealth Group quote' 'accept':88 'advertis':108 'ai/ml':61 'alon':202 'analyt':60 'api':76,138 'avail':166 'base':13,27,99,114 'base-network' 'bid/ask':188 'call':4,18,123 'challeng':107,178 'commit':83 'confirm':170 'connect':147 'consist':124 'content':153 'contract':103 'crypto':64 'data':59,186 'decim':119 'doc':137 'document':132 'e.g':187 'endpoint':30,51,86,168,200 'equal':120 'equity quote' 'exact':181 'exampl':164 'extrem':134 'financ':63 'flat':130 'group':40 'infer':62,197 'json':93 'json-response' 'key':77 'last':189 'limit':80 'live':171 'lowpaymentfee.com':32,55 'mani':50 'market':6,20,35 'market data API' 'maxamountrequir':110 'must':195 'network':100 'no-api-key' 'offer':52 'one':48 'openapi':157 'page':142 'path':201 'pay':2,16 'pay-per-cal':1,15 'pay-per-call' 'pay-per-call stock data' 'payload':165 'payment':44,94 'per':3,17,72,122 'platform':56 'post':89 'price':69,131,139,190 'prompt':149 'protocol':45 'provid':33 'quot':7,21,36 'rate':79 'readm':141 'render':144 'request':73,90 'request/response':160 'respons':185 'return':92,172 'schema':161 'servic':67 'settl':96 'shape':182 'site':127 'span':58 'spars':135 'spec':158 'specif':85 'state':129 'stock':5,19 'stock price API' 'stock-market-quote' 'unh':9,23,38 'unit':115 'unitedhealth':39 'unknown':193 'usdc':14,28,102 'usdc-settlement' 'use':101 'util':66 'valid':176 'via':10,24,41 'volum':191 'wallet':148 'x402':11,25,43,106,177 'x402 finance API' 'x402-payment'","prices":[{"id":"961b51a0-ec97-4924-bc1d-1daec5db7c85","listingId":"87f5fc62-91f4-4753-8fd3-b19c19c8b987","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/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":"2026-04-18T18:33:00.626Z"}],"sources":[{"listingId":"87f5fc62-91f4-4753-8fd3-b19c19c8b987","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/UNH","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:00.626Z","lastSeenAt":"2026-04-22T12:02:53.410Z"}],"details":{"listingId":"87f5fc62-91f4-4753-8fd3-b19c19c8b987","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/market/quote/UNH"},{"claim":"All endpoints 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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/market/quote/UNH"}],"useCases":["Fetching a real-time or recent market quote for UNH (UnitedHealth Group)","Agent-driven portfolio monitoring that needs on-demand equity quotes","Programmatic trading bots that require per-call market data without subscriptions","Integrating stock price lookups into AI agent workflows via x402 micropayments"],"bestFor":["AI agents needing on-demand stock quotes without API key management","Low-volume or sporadic equity data lookups at $0.02 per call","Developers prototyping finance apps who want instant access with no signup"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk data","Users needing historical OHLCV data or full order-book depth (not evidenced)","Anyone requiring detailed documentation or guaranteed SLAs before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T09:30:12.095Z"},"updatedAt":"2026-04-22T12:02:53.410Z"}}