{"id":"d87f1754-fcea-4635-88ec-cbd956a99cd5","shortId":"7QaEHN","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 `/api/v1/accounts/63` is one of many endpoints offered by the platform, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and requiring an exact payment of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised — access is gated purely by payment.\n\nThe specific functionality behind `/api/v1/accounts/63` is not documented in the crawled material. The platform's landing page lists other endpoints (metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, etc.) but does not describe what the `/accounts/63` resource returns. The docs, pricing, and README pages all rendered only a \"Connect wallet\" prompt with no additional content. Without documentation or an output schema beyond the basic HTTP POST input declaration, the exact response format and data returned by this particular endpoint remain unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","http-post","json-response"],"categories":["api-marketplace","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium API","USDC pay-per-call","Base network API","micropayment API"],"warnings":["No documentation available for /api/v1/accounts/63 — its purpose and response format are unknown","Docs, pricing, and README pages render only 'Connect wallet' with no content","No OpenAPI spec or output schema provided beyond basic HTTP POST declaration","The platform lists many endpoints but none match the /accounts/ path pattern, making this endpoint's role unclear"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/63","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/63","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation for the /accounts/63 endpoint, no OpenAPI schema, no example responses, and the docs/pricing/README pages are empty beyond a wallet-connect prompt. The actual functionality of this specific endpoint is 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'/api/v1/accounts/63':47,147 '/request':13,28 '0.02':12,27,76,115 '000':104 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':123 '0x8335':109 '20':103 '2913':110 '300':126 '6':113 'Base network API' 'USDC pay-per-call' 'accept':94 'access':7,22,38,137 'addit':200 'address':122 'advertis':136 'ai':63 'analysi':166 'analyt':62 'api':6,21,37,130 'base':9,24,84,105,112 'basic':210 'behind':146 'beyond':208 'call':4,19,117 'categori':59 'challeng':88 'classif':168 'confirm':89 'connect':195 'content':201 'crawl':153 'data':61,220 'decim':114 'declar':214 'describ':179 'doc':186 'document':150,203 'embed':169 'endpoint':32,52,72,91,162,225 'etc':175 'exact':100,216 'exchang':172 'feed':171 'financ':66 'format':218 'function':145 'gate':139 'geocod':174 'http':211 'http-post' 'includ':60 'infrastructur':69 'input':213 'json-response' 'key':131 'land':158 'learn':65 'limit':134 'list':160 'live':93 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':64 'made':120 'mani':51 'materi':154 'metric':163 'micropayment API' 'network':85 'offer':53 'one':49 'output':206 'page':159,190 'particular':224 'pay':2,17 'pay-per-cal':1,16 'pay-per-request' 'payment':42,101,118,142 'per':3,18,77,116 'platform':56,156 'post':95,212 'premium':5,20,36 'price':74,170,187 'prompt':197 'protocol':43 'provid':35 'pure':140 'rate':133,173 'readm':189 'remain':226 'render':192 'report':164 'request':78,96 'requir':98 'resourc':46,183 'respons':217 'return':184,221 'schema':207 'second':127 'sentiment':165 'settl':79 'span':58 'specif':45,144 'summar':167 'timeout':128 'unit':106 'unknown':227 'usdc':15,30,81,108 'usdc-base' 'util':70 'via':10,25,39 'wallet':196 'web3':67 'without':202 'x402':11,26,41,87 'x402 premium API' 'x402-payment'","prices":[{"id":"43bd4824-bf72-45c3-80dc-a35d0da7a99a","listingId":"d87f1754-fcea-4635-88ec-cbd956a99cd5","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/63","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:57.080Z"}],"sources":[{"listingId":"d87f1754-fcea-4635-88ec-cbd956a99cd5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/63","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:57.080Z","lastSeenAt":"2026-04-23T09:00:50.077Z"}],"details":{"listingId":"d87f1754-fcea-4635-88ec-cbd956a99cd5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/63 \\\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":"Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/63"},{"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/accounts/63"},{"claim":"Platform offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to premium API resources without API key management","Agent-driven pay-per-call workflows settled in USDC on Base","Accessing platform services (analytics, AI, finance, utilities) at $0.02/request"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents with x402-compatible wallets on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet","High-volume callers who would benefit from bulk pricing or subscriptions"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:37.547Z"},"updatedAt":"2026-04-23T09:00:50.077Z"}}