{"id":"519c6ed9-e95f-40c9-9165-3ee57af9c271","shortId":"GqjSCF","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/58` is one of many endpoints offered by the platform, which spans several categories: data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation).\n\nThe endpoint is live and returns a valid x402 challenge. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). The platform advertises uniform $0.02/request pricing across all endpoints, with no API keys, no rate limits, and no minimum commitments required.\n\nHowever, the specific functionality behind `/api/v1/accounts/58` is unclear — the description is simply \"Premium API Access\" with no further documentation on what data or service it returns. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation available. The platform appears to be a demonstration or early-stage x402 service. Agents should be aware that the actual response payload and input parameters for this specific endpoint are undocumented.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","http-post"],"categories":["general","api-marketplace"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The specific functionality of /api/v1/accounts/58 is undocumented — 'Premium API Access' is the only description provided.","All documentation pages (docs, pricing, README, api) render only 'Connect wallet' with no substantive content.","No OpenAPI schema or request/response examples are available.","The platform may be a demo or early-stage project; treat with caution."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/58","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/58","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming pricing and network details. However, there is no OpenAPI schema, no request/response examples, no documentation beyond a landing page listing, and the specific functionality of /api/v1/accounts/58 is entirely undocumented. The docs/pricing/README pages are empty 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'/request':13,28,138 '0.02':12,27,126,137 '000':121 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':114 '20':120 '6':131 'Base network API' 'USDC micropayment API' 'access':7,22,38,169 'across':140 'actual':231 'advertis':135 'agent':225 'ai':68 'analysi':72 'analyt':62 'api':6,21,37,145,168,184 'appear':214 'avail':211 'awar':228 'base':9,24,109,122 'behind':159 'call':4,19 'categori':60 'challeng':103 'classif':75 'commit':153 'connect':192 'content':198 'contract':113 'convers':92 'cost':118 'crypto-paid API' 'data':61,65,176 'decim':132 'demonstr':218 'descript':164 'detail':209 'doc':182 'document':173,210 'earli':221 'early-stag':220 'embed':76 'endpoint':32,52,95,142,240 'equal':125 'estim':86 'exampl':206 'exchang':81 'export':66 'feed':80 'financ':77 'function':158 'gas':85 'generat':93 'geocod':90 'howev':155 'http-post' 'infrastructur':88 'input':235 'insight':67 'json-response' 'key':146 'learn':70 'limit':149 'live':97 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':69 'mani':51 'maximum':117 'metric':63 'minimum':152 'network':110 'no-api-key' 'offer':53 'one':49 'openapi':202 'page':187 'paramet':236 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payload':233 'payment':42,104 'per':3,18,127 'platform':56,134,213 'premium':5,20,36,167 'premium API access' 'price':79,139,183 'prompt':194 'protocol':43 'provid':35 'quot':84 'rate':82,148 'readm':186 'render':189 'report':64 'request':128 'request/response':205 'requir':154 'resourc':46 'respons':232 'return':99,180 'schema':203 'sentiment':71 'servic':178,224 'settl':106 'sever':59 'simpli':166 'span':58 'specif':45,157,239 'stage':222 'substant':197 'summar':74 'text':73 'token':83 'unclear':162 'undocu':242 'uniform':136 'unit':123 'usdc':15,30,112,129 'usdc-base-network' 'use':111,130 'util':89 'valid':91,101 'via':10,25,39 'wallet':193 'web3':78 'x402':11,26,41,102,223 'x402 API' 'x402-payment'","prices":[{"id":"7345027d-3226-426f-b12b-135c3e870bf8","listingId":"519c6ed9-e95f-40c9-9165-3ee57af9c271","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/58","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:52.317Z"}],"sources":[{"listingId":"519c6ed9-e95f-40c9-9165-3ee57af9c271","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/58","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:52.317Z","lastSeenAt":"2026-04-22T10:01:30.170Z"}],"details":{"listingId":"519c6ed9-e95f-40c9-9165-3ee57af9c271","quickStartSnippet":"# 1. Send a POST to get the x402 payment challenge\ncurl -X POST https://lowpaymentfee.com/api/v1/accounts/58\n# Returns 402 with x402 challenge in body\n# 2. Construct X-PAYMENT header per x402 spec, sign USDC payment on Base\n# 3. Resend POST with X-PAYMENT header to receive the response","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/58"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/58"},{"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 USDC micropayments on Base","Testing x402 payment protocol integrations","Agent-driven API consumption without API key management"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call API access on Base","Low-volume consumers who want no subscription commitments"],"notFor":["Users needing well-documented, production-grade APIs with clear schemas","High-volume use cases where $0.02/request adds up significantly","Anyone requiring detailed documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:37.75Z"},"updatedAt":"2026-04-22T10:01:30.170Z"}}