{"id":"7dbd6b2f-1bea-4509-9272-2f9b685a1f6a","shortId":"srqJCf","kind":"x402","title":"Pay-per-call audit log access on Base via x402 — $0.02 per request in USDC.","tagline":"Pay-per-call audit log access on Base via x402 — $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides premium API access to audit log data (specifically log entry #47) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-scheme challenge requiring up to 20,000 base units (i.e., $0.02 per call, since USDC uses 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises a suite of endpoints spanning data & analytics, AI & machine learning (sentiment analysis, 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 $0.02 per request with no API keys, no rate limits, and no minimum commitments. However, this specific listing covers only the `/api/v1/audit/logs/47` resource.\n\nDocumentation is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema beyond the x402 challenge's outputSchema stub, and no example payloads. The endpoint is confirmed live (returns a valid 402 challenge), but the actual data returned after payment is unknown.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-base","audit-logs","json-response","no-api-key"],"categories":["data","infrastructure"],"synonyms":["audit log API","premium API access","x402 endpoint","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available — actual request body and response format are unknown.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content.","The specific resource '/api/v1/audit/logs/47' is not listed on the homepage's API catalog — it may be an unlisted or test endpoint.","No examples of successful responses exist in the crawl material."],"endpointUrl":"https://lowpaymentfee.com/api/v1/audit/logs/47","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/47","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 via a valid 402 challenge, but there is virtually no documentation: no OpenAPI spec, no request/response examples, no description of what 'audit/logs/47' actually returns. Docs pages render only 'Connect wallet'. Pricing is clear ($0.02) but everything else must be 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'0.02':12,28,87,137 '000':83 '0x8335':71 '20':82 '2913':72 '402':209 '47':48 '6':93 'Base network API' 'USDC micropayment API' 'accept':55 'access':7,23,40 'actual':213 'advertis':99 'ai':107 'analysi':111 'analyt':106 'api':39,142,168 'audit':5,21,42 'audit log API' 'audit-logs' 'base':9,25,66,84 'beyond':190 'broader':96 'call':4,20,89 'challeng':78,193,210 'classif':113 'commit':150 'confirm':204 'connect':174 'contract':70 'convers':130 'cover':155 'data':44,105,214 'decim':94 'detail':181 'doc':165 'document':160 'embed':114 'endpoint':34,103,133,202 'entri':47 'estim':124 'exact':76 'exact-schem':75 'exampl':199 'exchang':119 'extrem':162 'feed':118 'financ':115 'gas':123 'generat':131 'geocod':128 'howev':151 'i.e':86 'infrastructur':126 'json':60 'json-response' 'key':143 'learn':109 'limit':146 'list':135,154 'live':205 'log':6,22,43,46 'lowpaymentfee' 'lowpaymentfee.com':36,97 'machin':108 'minimum':149 'network':67 'no-api-key' 'openapi':185 'outputschema':195 'page':169 'pay':2,18 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request' 'payload':200 'payment':52,61,217 'per':3,13,19,29,88,138 'platform':98 'post':56 'premium':38 'premium API access' 'price':117,166 'prompt':176 'protocol':53 'provid':37 'quot':122 'rate':120,145 'render':171 'request':14,30,57,139 'request/response':188 'requir':79 'resourc':159 'return':59,206,215 'schema':189 'scheme':77 'sentiment':110 'settl':63 'sinc':90 'span':104 'spars':163 'spec':186 'specif':45,153 'stub':196 'suit':101 'summar':112 'technic':180 'token':121 'unit':85 'unknown':219 'usdc':16,32,69,91 'usdc-base' 'use':68,92 'util':127 'valid':129,208 'via':10,26,49 'wallet':175 'web3':116 'x402':11,27,51,192 'x402 endpoint' 'x402-payment'","prices":[{"id":"375457c6-d86a-440b-aac4-3649c7928ad6","listingId":"7dbd6b2f-1bea-4509-9272-2f9b685a1f6a","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/47","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:43:03.821Z"}],"sources":[{"listingId":"7dbd6b2f-1bea-4509-9272-2f9b685a1f6a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/audit/logs/47","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:43:03.821Z","lastSeenAt":"2026-04-27T06:33:42.552Z"}],"details":{"listingId":"7dbd6b2f-1bea-4509-9272-2f9b685a1f6a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/audit/logs/47 \\\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 a valid x402 402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/audit/logs/47"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/audit/logs/47"}],"useCases":["Retrieving audit log entries on a per-call payment basis without needing an API key","Programmatic access to audit data settled via USDC on Base L2","Agent-driven workflows that need to purchase individual data records via x402"],"bestFor":["Developers or agents wanting keyless, pay-per-use audit log access","x402-compatible wallets and agent frameworks on Base","Low-volume, on-demand data retrieval without subscription commitments"],"notFor":["High-volume bulk audit log exports (no documented batch endpoint)","Users who need detailed API documentation or response schemas before purchasing","Non-crypto users who cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:28.491Z"},"updatedAt":"2026-04-27T06:33:42.552Z"}}