{"id":"ac2aa5f1-3b2d-4a03-89cc-244953ef15fb","shortId":"FRqdkz","kind":"x402","title":"Pay-per-call audit logs endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call audit logs endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This x402-enabled endpoint at lowpaymentfee.com provides access to audit logs (specifically the `/api/v1/audit/logs/30` path) via a POST request, paid per-call in USDC on the Base network. The endpoint returns a 402 challenge advertising a maximum cost of 20,000 base units of USDC (0.02 USD per request, since USDC uses 6 decimals). No API keys or rate limits are required — payment is handled entirely through the x402 protocol's X-PAYMENT header.\n\nThe broader lowpaymentfee.com platform advertises a wide catalog of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (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 network using USDC.\n\nDocumentation is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the audit logs endpoint actually returns. The endpoint is live and responds with a valid x402 challenge, but the lack of documentation makes it difficult to know what data to send or what response to expect.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","audit-logs","pay-per-call","no-api-key","post-endpoint"],"categories":["data","infrastructure"],"synonyms":["audit log API","pay-per-request API","x402 API","USDC micropayment API","Base network API","lowpaymentfee","audit trail endpoint"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or request/response schema provided; it is unknown what POST body to send or what the response looks like.","The specific purpose and data returned by /api/v1/audit/logs/30 is undocumented and unclear.","The broader platform lists many endpoints but none have documented schemas or examples."],"endpointUrl":"https://lowpaymentfee.com/api/v1/audit/logs/30","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/30","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 with clear pricing, but documentation is essentially nonexistent — no OpenAPI schema, no request/response examples, and no description of what the audit logs endpoint returns or what input it expects. The listing is effectively a 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'/request':17,34,161 '0.02':16,33,82,160 '000':77 '20':76 '402':69 '6':89 'Base network API' 'USDC micropayment API' 'access':43 'actual':212 'advertis':71,116 'ai/ml':129 'analysi':132 'analyt':128 'api':92,125,179 'audit':5,22,45,209 'audit log API' 'audit trail endpoint' 'audit-logs' 'base':9,26,63,78,168 'base-network' 'broader':113 'call':4,21,58,124 'catalog':119 'challeng':70,224 'classif':134 'connect':187 'content':193 'convers':151 'cost':74 'data':127,137,236 'decim':90 'descript':205 'detail':204 'difficult':232 'doc':177 'document':172,229 'embed':135 'enabl':38 'endpoint':7,24,39,66,154,211,215 'entir':102 'estim':145 'exampl':201 'exchang':140 'expect':243 'extrem':174 'feed':139 'finance/web3':136 'gas':144 'generat':152 'geocod':149 'handl':101 'header':111 'infer':130 'infrastructur':147 'key':93 'know':234 'lack':227 'limit':96 'list':156 'live':217 'log':6,23,46,210 'lowpaymentfee' 'lowpaymentfee.com':41,114 'make':230 'maximum':73 'network':64,169 'no-api-key' 'openapi':197 'page':182 'paid':55 'path':50 'pay':2,19,122 'pay-per-cal':1,18,121 'pay-per-call' 'pay-per-request API' 'payment':99,110 'per':3,20,57,84,123 'per-cal':56 'platform':115 'point':163 'post':53 'post-endpoint' 'price':138,162,178 'prompt':189 'protocol':106 'provid':42 'quot':143 'rate':95,141 'readm':181 'render':184 'request':54,85 'request/response':200 'requir':98 'respond':219 'respons':241 'return':67,213 'schema':198 'send':238 'sentiment':131 'settl':12,29,165 'sinc':86 'span':126 'spars':175 'specif':47 'summar':133 'token':142 'unit':79 'usd':83 'usdc':14,31,60,81,87,171 'usdc-settlement' 'use':88,170 'util':148 'valid':150,222 'via':10,27,51 'wallet':188 'wide':118 'x':109 'x-payment':108 'x402':11,28,37,105,223 'x402 API' 'x402-enabled':36 'x402-payment'","prices":[{"id":"5320a3dc-dd50-4ee1-818b-345d4cee4dba","listingId":"ac2aa5f1-3b2d-4a03-89cc-244953ef15fb","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/30","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:57.722Z"}],"sources":[{"listingId":"ac2aa5f1-3b2d-4a03-89cc-244953ef15fb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/audit/logs/30","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:57.722Z","lastSeenAt":"2026-04-27T07:04:40.687Z"}],"details":{"listingId":"ac2aa5f1-3b2d-4a03-89cc-244953ef15fb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/audit/logs/30 \\\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":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/audit/logs/30"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/audit/logs/30"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving audit log entries via a single paid API call","Programmatic access to audit data without managing API keys or subscriptions","Agent-driven audit log retrieval with automatic crypto micropayment"],"bestFor":["Developers who want keyless, pay-as-you-go audit log access","AI agents that can settle x402 payments on Base","Users who prefer per-call pricing over subscription models"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume consumers who would benefit from bulk/subscription pricing","Anyone who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:28.73Z"},"updatedAt":"2026-04-27T07:04:40.687Z"}}