{"id":"b26d3a27-6f10-43ae-b2d8-0531f371f57f","shortId":"NV7MAr","kind":"x402","title":"Pay-per-call audit log access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call audit log access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides premium API access to audit log data (specifically log ID 42 in this listing, but the provider hosts a broad suite of endpoints). It uses the x402 payment protocol on the Base network, accepting USDC (USD Coin) payments at $0.02 per request. No API keys, rate limits, or subscriptions are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe provider's landing page advertises a wide catalog of pay-per-call APIs 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 endpoints are listed at the same $0.02/request price point and settle on the Base L2 network using USDC.\n\nThe specific endpoint probed here (`/api/v1/audit/logs/42`) returned a valid 402 challenge with maxAmountRequired of 20000 base units of USDC (6 decimals), which equals $0.02. The endpoint accepts POST requests and returns application/json. Documentation beyond the landing page is sparse — the docs, API, pricing, and README pages all appear to require a wallet connection and render minimal content.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","audit-logs","no-api-key","no-rate-limit","json-response"],"categories":["data","infrastructure"],"synonyms":["audit log API","premium API access","x402 API","pay-per-request API","Base USDC API","lowpaymentfee","micropayment API"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","Docs, pricing, and README pages render only a 'Connect wallet' prompt with no useful content","The exact nature and contents of the audit log data are undocumented","The provider hosts many endpoints but none appear to have public documentation beyond the landing page listing"],"endpointUrl":"https://lowpaymentfee.com/api/v1/audit/logs/42","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/audit/logs/42","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response body format, no examples, and the docs/pricing/README pages are effectively empty (wallet-gated). The specific purpose of 'audit logs' is not explained 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'/request':13,28,158 '0.02':12,27,75,157,193 '20000':184 '402':179 '42':46 '6':189 'Base USDC API' 'accept':69,196 'access':7,22,38 'advertis':106 'ai':124 'analysi':128 'analyt':118 'api':37,79,115,211 'appear':217 'application/json':201 'attach':89 'audit':5,20,40 'audit log API' 'audit-logs' 'base':9,24,67,165,185 'beyond':203 'broad':55 'call':4,19,114 'caller':87 'catalog':109 'challeng':180 'classif':131 'coin':72 'connect':222 'content':226 'convers':148 'data':42,117,121 'decim':190 'doc':210 'document':202 'embed':132 'endpoint':32,58,151,172,195 'equal':192 'estim':142 'exchang':137 'export':122 'feed':136 'financ':133 'gas':141 'generat':149 'geocod':146 'header':94 'host':53 'id':45 'infrastructur':144 'insight':123 'json-response' 'key':80 'l2':166 'land':104,205 'learn':126 'limit':82 'list':49,153 'log':6,21,41,44 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':125 'maxamountrequir':182 'metric':119 'micropayment API' 'minim':225 'network':68,167 'no-api-key' 'no-rate-limit' 'page':105,206,215 'pay':2,17,112 'pay-per-cal':1,16,111 'pay-per-call' 'pay-per-request API' 'payment':63,73,93,99 'per':3,18,76,113 'point':160 'post':197 'premium':36 'premium API access' 'price':135,159,212 'probe':173 'proof':100 'protocol':64 'provid':35,52,102 'quot':140 'rate':81,138 'readm':214 'render':224 'report':120 'request':77,198 'requir':86,219 'return':176,200 'sentiment':127 'settl':162 'simpli':88 'span':116 'spars':208 'specif':43,171 'subscript':84 'suit':56 'summar':130 'text':129 'token':139 'unit':186 'usd':71 'usdc':15,30,70,169,188 'usdc-base' 'use':60,168 'util':145 'valid':97,147,178 'via':10,25 'wallet':221 'web3':134 'wide':108 'x':92 'x-payment':91 'x402':11,26,62,98 'x402 API' 'x402-payment'","prices":[{"id":"f773df6a-af74-4c79-9d9e-495043d129af","listingId":"b26d3a27-6f10-43ae-b2d8-0531f371f57f","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/audit/logs/42","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:43:00.217Z"}],"sources":[{"listingId":"b26d3a27-6f10-43ae-b2d8-0531f371f57f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/audit/logs/42","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:43:00.217Z","lastSeenAt":"2026-04-27T07:04:40.800Z"}],"details":{"listingId":"b26d3a27-6f10-43ae-b2d8-0531f371f57f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/audit/logs/42 \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/audit/logs/42"},{"claim":"All endpoints are priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/audit/logs/42"},{"claim":"Docs, API, pricing, and README pages show only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving audit log entries on a per-call payment basis without needing an API key or subscription","Programmatic access to audit data for compliance or monitoring workflows","Agent-driven data retrieval where per-request crypto payment is preferred over traditional auth"],"bestFor":["Developers or agents who want instant, keyless API access paid per call","Use cases requiring audit log data without subscription commitments","Crypto-native workflows settling on Base L2 with USDC"],"notFor":["High-volume consumers who need bulk pricing or subscription discounts","Users without access to USDC on the Base network","Anyone needing detailed API documentation or OpenAPI specs before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:28.609Z"},"updatedAt":"2026-04-27T07:04:40.800Z"}}