{"id":"04409fa7-20b2-4843-b1e4-b238eff4210b","shortId":"8FWq37","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific resource at `/api/v1/accounts/186` is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract `0x8335...2913` on Base). The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per call. Payment is made via the `exact` scheme with a 300-second timeout. The response MIME type is `application/json`.\n\nThe specific functionality of the `/api/v1/accounts/186` endpoint is not documented beyond the generic label \"Premium API Access.\" The platform's landing page lists numerous other endpoints (metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, etc.), all at the same $0.02 price point, but no detailed documentation, request/response schemas, or examples are available for any of them. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response"],"categories":["api-marketplace","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium API","pay-per-call API","USDC API access","Base network API"],"warnings":["No documentation available — docs, pricing, and README pages all show only 'Connect wallet' with no content","The specific functionality of /api/v1/accounts/186 is unknown; 'Premium API Access' is a generic label","No request or response schema is provided; callers cannot know what to send or expect back","The platform lists many endpoints but none have detailed documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/186","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/accounts/186","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no request/response schema, and no explanation of what '/api/v1/accounts/186' actually returns. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. The listing is effectively a 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'/request':13,28 '0.02':12,27,76,133,197 '000':124 '0x8335':114 '20':123 '2913':115 '300':145 '6':129 'Base network API' 'USDC API access' 'accept':105 'access':7,22,38,170 'ai':62 'amount':120 'analysi':183 'analyt':61 'api':6,21,37,88,169,216 'application/json':153 'avail':209 'base':9,24,84,117,125 'base-network' 'beyond':164 'call':4,19,135 'categori':70 'challeng':99 'classif':185 'commit':95 'confirm':100 'connect':225 'content':231 'contract':113 'data':60 'decim':130 'detail':202 'doc':215 'document':163,203 'embed':186 'endpoint':32,53,72,102,160,179 'equal':132 'etc':192 'exact':141 'exampl':207 'exchang':189 'feed':188 'financ':65 'function':156 'generic':166 'geocod':191 'infrastructur':68 'json-response' 'key':89 'label':167 'land':174 'learn':64 'limit':92 'list':176 'live':104 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':63 'made':138 'mani':52 'max':119 'metric':180 'mime':150 'network':85 'no-api-key' 'numer':177 'offer':54 'one':50 'page':175,220 'paid':79 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,110,136 'per':3,18,77,134 'platform':57,172 'point':199 'post':106 'premium':5,20,36,168 'price':74,187,198,217 'prompt':227 'protocol':43 'provid':35 'rate':91,190 'readm':219 'render':222 'report':181 'request':78,107 'request/response':204 'requir':96,121 'resourc':46 'respons':149 'schema':205 'scheme':142 'second':146 'sentiment':182 'settl':109 'span':59 'specif':45,155 'substant':230 'summar':184 'timeout':147 'type':151 'unit':126 'usdc':15,30,81,112,128 'usdc-settlement' 'util':69 'via':10,25,39,139 'wallet':226 'web3':66 'x402':11,26,41,98 'x402 premium API' 'x402-payment'","prices":[{"id":"effd37e4-5e6b-4b04-b303-b35cdbf66875","listingId":"04409fa7-20b2-4843-b1e4-b238eff4210b","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/accounts/186","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:37.943Z"}],"sources":[{"listingId":"04409fa7-20b2-4843-b1e4-b238eff4210b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/186","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:37.943Z","lastSeenAt":"2026-04-23T06:04:01.765Z"}],"details":{"listingId":"04409fa7-20b2-4843-b1e4-b238eff4210b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/186 \\\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":"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":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base with exact scheme and 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/accounts/186"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/186"},{"claim":"Platform offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data with per-request micropayments in USDC","Agent-driven API consumption without pre-registration or API keys","Programmatic access to various utility and data endpoints via x402 protocol"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","Applications requiring free or subscription-based access without crypto wallets"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.629Z"},"updatedAt":"2026-04-23T06:04:01.765Z"}}