{"id":"e21fccff-6be6-42a0-9e8b-77dc1a02a017","shortId":"QkkLYj","kind":"x402","title":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific path `/api/v1/accounts/75` appears to be one of many endpoints offered by this provider, which hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities.\n\nThe endpoint accepts POST requests and requires an X-PAYMENT header conforming to x402 version 1. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum amount of 20,000 base units, which equals $0.02 USD (USDC uses 6 decimals). The provider advertises no API keys, no rate limits, and instant access — you simply pay per request.\n\nThe broader platform lists endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. However, documentation beyond the landing page is minimal (other pages only show \"Connect wallet\"), so the actual response format and capabilities of this specific `/api/v1/accounts/75` endpoint are unclear.","tags":[],"capabilities":["x402-payment","pay-per-request","base-network","usdc-settlement","no-api-key","post-method","json-response"],"categories":["api-marketplace","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 endpoint","micropayment API","Base USDC API","lowpaymentfee"],"warnings":["No documentation available — docs, pricing, and README pages only show 'Connect wallet'","The specific purpose and response format of /api/v1/accounts/75 is unknown","No OpenAPI spec or output schema beyond basic HTTP method declaration","Cannot verify what data or service is actually delivered after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/75","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/75","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation on what this specific endpoint returns, no request/response schema, and the docs/pricing/README pages are all blank ('Connect wallet' only). The purpose of '/api/v1/accounts/75' is not explained 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'/request':16,34,182 '0.02':15,33,124,181 '000':119 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':112 '1':101 '20':118 '6':128 'Base USDC API' 'accept':87 'access':7,25,44,141 'actual':201 'advertis':132 'ai/ml':79 'amount':116 'analysi':159 'analyt':78 'api':6,24,43,75,134 'appear':54 'base':9,27,107,120 'base-network' 'beyond':187 'broad':68 'broader':148 'call':4,22 'capabl':205 'catalog':69 'classif':162 'conform':97 'connect':197 'contract':111 'convers':174 'data':77,155 'decim':129 'document':186 'embed':163 'endpoint':38,60,86,151,210 'equal':123 'estim':171 'exchang':166 'export':156 'feed':165 'finance/web3':81 'format':203 'gas':170 'generat':176 'geocod':172 'header':96 'host':66 'howev':185 'infer':80 'infrastructur':83 'insight':157 'instant':140 'json-response' 'key':135 'land':189 'limit':138 'list':150 'lowpaymentfee' 'lowpaymentfee.com':40 'mani':59 'maximum':115 'metric':153 'micropayment API' 'minim':192 'network':10,28,108 'no-api-key' 'offer':61 'one':57 'page':190,194 'path':52 'pay':2,20,72,144 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':71 'payment':48,95,102 'per':3,21,73,145 'platform':149 'point':184 'post':88 'post-method' 'premium':5,23,42 'premium API' 'price':164,183 'protocol':13,31,49 'provid':41,64,131 'quot':169 'rate':137,167 'report':154 'request':74,89,146 'requir':91 'respons':202 'sentiment':158 'settl':104 'show':196 'simpli':143 'span':76 'specif':51,208 'summar':161 'text':160 'token':168 'unclear':212 'unit':121 'usd':125 'usdc':18,36,110,126 'usdc-settlement' 'use':109,127 'util':84 'valid':173 'version':100 'via':11,29,45 'wallet':198 'x':94 'x-payment':93 'x402':12,30,47,99 'x402 endpoint' 'x402-payment'","prices":[{"id":"f6ddf089-51cd-40e2-821c-ac9d7730d3d2","listingId":"e21fccff-6be6-42a0-9e8b-77dc1a02a017","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/75","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:05.472Z"}],"sources":[{"listingId":"e21fccff-6be6-42a0-9e8b-77dc1a02a017","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/75","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:05.472Z","lastSeenAt":"2026-04-23T07:30:55.944Z"}],"details":{"listingId":"e21fccff-6be6-42a0-9e8b-77dc1a02a017","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/75 \\\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 version 1 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/75"},{"claim":"Maximum amount required is 20000 base units of USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)","source_url":"https://lowpaymentfee.com/api/v1/accounts/75"},{"claim":"Provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform lists multiple API categories including Data & Analytics, AI & ML, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or account information without subscription commitments","Agent-driven API consumption with per-call crypto payments","Integrating pay-as-you-go services into automated workflows"],"bestFor":["Developers wanting no-signup, pay-per-use API access","AI agents that can settle payments via x402 on Base","Users who prefer crypto micropayments over traditional API key subscriptions"],"notFor":["Users needing detailed API documentation before integration","High-volume consumers who would benefit from bulk pricing or subscriptions","Users without access to USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:37.105Z"},"updatedAt":"2026-04-23T07:30:55.944Z"}}