{"id":"ad3f1424-a5d1-480a-af9e-74d1645163e0","shortId":"cUCVJf","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/116` accepts POST requests and charges up to 20,000 base units of USDC (0x8335…2913) on the Base network, which equals $0.02 per request (USDC uses 6 decimals). Payment is handled inline via the X-PAYMENT header with no API keys or account registration required.\n\nThe broader lowpaymentfee.com platform advertises a suite of endpoints spanning 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) — all priced at $0.02 per request. However, this specific listing covers only the `/api/v1/accounts/116` endpoint, whose exact functionality beyond \"Premium API Access\" is not documented.\n\nThe endpoint is live and returns a valid x402 challenge (HTTP 402) with a 300-second payment timeout. No OpenAPI schema, detailed documentation, or example responses were found in the crawl. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional technical content. Because the actual response payload and input parameters for this particular endpoint are undocumented, agents should treat this as a minimally-documented but functional x402 endpoint.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","post-endpoint","json-response"],"categories":["api","infrastructure"],"synonyms":["premium API","paid API access","x402 API","USDC micropayment API","Base network API","lowpaymentfee","accounts endpoint"],"warnings":["No documentation available — docs, pricing, and API pages all render only 'Connect wallet' with no technical content","The specific purpose and response format of /api/v1/accounts/116 is undocumented","No OpenAPI or input/output schema provided beyond the minimal outputSchema in the x402 challenge","The broader platform lists many endpoints but none have documented schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/116","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/116","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 challenge, but there is no documentation, no OpenAPI schema, no example requests or responses, and the actual functionality of /api/v1/accounts/116 is completely opaque beyond the label 'Premium API Access'. The docs pages are empty 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'/request':13,28 '0.02':12,27,70,141 '000':57 '0x8335':62 '20':56 '2913':63 '300':177 '402':174 '6':75 'Base network API' 'USDC micropayment API' 'accept':49 'access':7,22,38,159 'account':92 'accounts endpoint' 'actual':214 'addit':209 'advertis':99 'agent':226 'ai':112 'analysi':116 'analyt':106 'api':6,21,37,89,158,198 'base':9,24,58,66 'beyond':156 'broader':96 'call':4,19 'challeng':172 'charg':53 'classif':119 'connect':204 'content':211 'convers':136 'cover':148 'crawl':193 'data':105,109 'decim':76 'detail':184 'doc':195 'document':162,185,234 'embed':120 'endpoint':32,103,152,164,223,238 'equal':69 'estim':130 'exact':154 'exampl':187 'exchang':125 'export':110 'feed':124 'financ':121 'found':190 'function':155,236 'gas':129 'generat':137 'geocod':134 'handl':79 'header':86 'howev':144 'http':173 'infrastructur':132 'inlin':80 'input':218 'insight':111 'json-response' 'key':90 'learn':114 'list':147 'live':166 'lowpaymentfee' 'lowpaymentfee.com':34,97 'machin':113 'metric':107 'minim':233 'minimally-docu':232 'network':67 'no-api-key' 'openapi':182 'page':199 'paid API access' 'paramet':219 'particular':222 'pay':2,17 'pay-per-cal':1,16 'pay-per-request' 'payload':216 'payment':42,77,85,179 'per':3,18,71,142 'platform':98 'post':50 'post-endpoint' 'premium':5,20,36,157 'premium API' 'price':123,139,196 'prompt':206 'protocol':43 'provid':35 'quot':128 'rate':126 'registr':93 'render':201 'report':108 'request':51,72,143 'requir':94 'resourc':46 'respons':188,215 'return':168 'schema':183 'second':178 'sentiment':115 'span':104 'specif':45,146 'suit':101 'summar':118 'technic':210 'text':117 'timeout':180 'token':127 'treat':228 'undocu':225 'unit':59 'usdc':15,30,61,73 'usdc-base' 'use':74 'util':133 'valid':135,170 'via':10,25,39,81 'wallet':205 'web3':122 'whose':153 'x':84 'x-payment':83 'x402':11,26,41,171,237 'x402 API' 'x402-payment'","prices":[{"id":"d4a20488-0bd7-43a4-b977-01ae6fb66e82","listingId":"ad3f1424-a5d1-480a-af9e-74d1645163e0","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/116","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:46.766Z"}],"sources":[{"listingId":"ad3f1424-a5d1-480a-af9e-74d1645163e0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/116","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:46.766Z","lastSeenAt":"2026-04-22T16:30:58.539Z"}],"details":{"listingId":"ad3f1424-a5d1-480a-af9e-74d1645163e0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/116 \\\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 HTTP 402 with x402 challenge requiring USDC payment on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/116"},{"claim":"maxAmountRequired is 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/accounts/116"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, and API pages render only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing a pay-per-call API without needing to register or manage API keys","Making programmatic requests settled instantly in USDC on Base","Agent-driven API consumption with inline crypto payment"],"bestFor":["Developers wanting zero-friction API access with no signup","AI agents that can settle x402 payments autonomously","Users who prefer per-request pricing over subscriptions"],"notFor":["Users who need detailed documentation or OpenAPI specs before integrating","Anyone without a Base-compatible USDC wallet","High-volume use cases where per-request pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:35.134Z"},"updatedAt":"2026-04-22T16:30:58.539Z"}}