{"id":"5c11ce4b-c677-4fe9-9a8b-03dd4aae501f","shortId":"3dzC7h","kind":"x402","title":"Pay-per-call audit log retrieval on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call audit log retrieval on Base via x402, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides access to audit log data (specifically log ID 90) via a pay-per-request x402 payment flow. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per call (USDC uses 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe provider, lowpaymentfee.com, hosts a broader suite of APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, gas estimates), and infrastructure utilities (geocoding, validation, conversion). All endpoints share the same $0.02/request pricing model and x402 payment mechanism on Base. However, this specific listing covers only the `/api/v1/audit/logs/90` endpoint.\n\nDocumentation is extremely sparse. The crawled /docs, /api, /pricing, and /README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the audit log data actually contains. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know what fields to send in a POST body or what shape the response takes.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","audit-logs","pay-per-request","no-api-key","json-response"],"categories":["data","infrastructure"],"synonyms":["audit log API","x402 audit endpoint","pay-per-call logs","USDC micropayment API","Base network API","lowpaymentfee","audit trail","log retrieval"],"warnings":["No documentation available — /docs, /api, /pricing, and /README all return only a 'Connect wallet' prompt with no content.","No OpenAPI or schema describing request body fields or response structure.","The specific endpoint '/api/v1/audit/logs/90' is not listed on the provider's homepage among their advertised APIs, raising questions about whether it is a production endpoint or a demo/test resource.","Response format and fields are entirely unknown; callers must experiment to discover the API contract."],"endpointUrl":"https://lowpaymentfee.com/api/v1/audit/logs/90","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/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages return only a wallet-connect prompt. The purpose of 'audit/logs/90' is unclear — it may be a demo or placeholder endpoint. Effectively a stub 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'/api/v1/audit/logs/90':173 '/docs':181 '/pricing':183 '/readme':185 '/request':17,34,157 '0.02':16,33,89,156 '000':84 '0x8335':76 '20':83 '2913':77 '402':225 '6':94 '90':48 'Base network API' 'USDC micropayment API' 'accept':60 'access':40 'actual':215 'ai/ml':130 'analysi':133 'analyt':129 'api':97,126 'attach':106 'audit':5,22,42,212 'audit log API' 'audit trail' 'audit-logs' 'base':9,26,71,85,165 'base-network' 'bodi':244 'broader':123 'call':4,21,91 'caller':104 'challeng':226 'classif':135 'confirm':220 'connect':191 'contain':216 'content':197 'contract':75 'convers':150 'cost':81 'cover':170 'crawl':180 'data':44,128,138,214 'decim':95 'descript':208 'difficult':234 'document':175,231 'embed':136 'endpoint':36,59,152,174,218 'equal':88 'estim':144 'exampl':205 'exchang':141 'extrem':177 'feed':140 'field':238 'finance/web3':137 'flow':57 'gas':143 'geocod':148 'header':111 'host':121 'howev':166 'id':47 'infer':131 'infrastructur':146 'json':65 'json-response' 'key':98 'know':236 'lack':229 'limit':101 'list':169 'live':221 'log':6,23,43,46,213 'log retrieval' 'lowpaymentfee' 'lowpaymentfee.com':38,120 'make':232 'maximum':80 'mechan':163 'model':159 'network':72 'no-api-key' 'openapi':201 'page':186 'pay':2,19,52 'pay-per-cal':1,18 'pay-per-call logs' 'pay-per-request':51 'payment':56,66,110,116,162 'per':3,20,53,90 'post':61,243 'price':139,158 'prompt':193 'proof':117 'proper':224 'provid':39,119 'rate':100,142 'request':54,62 'request/response':204 'requir':103 'respons':249 'retriev':7,24 'return':64,188,222 'schema':202 'send':240 'sentiment':132 'settl':12,29,68 'shape':247 'share':153 'simpli':105 'span':127 'spars':178 'specif':45,168 'substant':196 'suit':124 'summar':134 'take':250 'unit':86 'usdc':14,31,74,92 'usdc-settlement' 'use':73,93 'util':147 'valid':114,149 'via':10,27,49 'wallet':192 'x':109 'x-payment':108 'x402':11,28,55,115,161 'x402 audit endpoint' 'x402-payment'","prices":[{"id":"3509088e-be55-403f-928f-98e789247e09","listingId":"5c11ce4b-c677-4fe9-9a8b-03dd4aae501f","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/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:43:12.855Z"}],"sources":[{"listingId":"5c11ce4b-c677-4fe9-9a8b-03dd4aae501f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/audit/logs/90","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:43:12.855Z","lastSeenAt":"2026-04-27T03:32:53.068Z"}],"details":{"listingId":"5c11ce4b-c677-4fe9-9a8b-03dd4aae501f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/audit/logs/90 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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 x402Version 1, accepting USDC on Base with maxAmountRequired of 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/audit/logs/90"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/audit/logs/90"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The provider advertises APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving audit log entries on a per-request payment basis without needing an API key","Integrating pay-as-you-go audit data access into agent workflows","Programmatic compliance or monitoring checks against audit records"],"bestFor":["Agents or services that need occasional audit log lookups without subscription commitments","Developers experimenting with x402 payment-gated APIs on Base","Workflows requiring no-signup, instant-access audit data"],"notFor":["High-volume audit log streaming where per-request costs would accumulate quickly","Users who need detailed API documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:27.984Z"},"updatedAt":"2026-04-27T03:32:53.068Z"}}