{"id":"4b00fe32-c8c5-4e79-ace6-242aa8ae55d2","shortId":"ecPBQm","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 access to audit log data (specifically log ID 31) behind an x402 paywall. The provider operates a broad suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all settled on the Base network using USDC. Each call costs $0.02 (20,000 base units of USDC with 6 decimals).\n\nThe specific resource `/api/v1/audit/logs/31` is described as \"Premium API Access\" and accepts POST requests. It returns `application/json`. Payment is made via the x402 protocol: the endpoint returns a 402 challenge with payment parameters, and the caller includes an `X-PAYMENT` header with a signed payment to the specified address on Base. No API keys, rate limits, or upfront commitments are required — access is purely pay-per-use.\n\nNote that this particular endpoint (`/audit/logs/31`) is not listed on the provider's public landing page among the advertised API categories. The landing page showcases analytics, AI, finance, and utility endpoints, all at $0.02/request. Documentation pages (`/docs`, `/pricing`, `/README`) returned minimal content (just a \"Connect wallet\" prompt), so detailed request/response schemas are unavailable. The endpoint is live and responding with a valid x402 challenge.","tags":[],"capabilities":["x402-payment","pay-per-request","audit-logs","usdc-settlement","base-network","json-response","no-api-key"],"categories":["data","infrastructure"],"synonyms":["audit log API","premium API access","x402 audit endpoint","pay-per-call logs","Base USDC API","lowpaymentfee API","402 payment API"],"warnings":["The endpoint /api/v1/audit/logs/31 is not listed among the provider's publicly advertised APIs — it may be internal, experimental, or undocumented.","Documentation pages (/docs, /pricing, /README) returned no meaningful content beyond a wallet-connect prompt.","No request body schema or response schema is available; callers must discover the expected format by trial.","The description 'Premium API Access' is generic and does not clarify what data this endpoint actually returns."],"endpointUrl":"https://lowpaymentfee.com/api/v1/audit/logs/31","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/31","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no documentation of request/response formats, and the specific audit/logs endpoint is not mentioned on the provider's landing page. Docs pages are effectively empty. The listing is largely inferred from the 402 challenge 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'/audit/logs/31':166 '/docs':198 '/pricing':199 '/readme':200 '/request':13,28,195 '0.02':12,27,82,194 '000':84 '20':83 '31':44 '402':120 '402 payment API' '6':90 'Base USDC API' 'accept':103 'access':7,22,36,101,154 'address':141 'advertis':179 'ai':187 'ai/ml':64 'among':177 'analyt':63,186 'api':60,100,145,180 'application/json':108 'audit':5,20,38 'audit log API' 'audit-logs' 'base':9,24,75,85,143 'base-network' 'behind':45 'broad':53 'call':4,19,80 'caller':127 'categori':181 'challeng':121,225 'commit':151 'connect':206 'content':203 'cost':81 'data':40,62,67 'decim':91 'describ':97 'detail':210 'document':196 'endpoint':32,117,165,191,216 'financ':188 'finance/web3':66 'header':133 'id':43 'includ':128 'infer':65 'infrastructur':69 'json-response' 'key':146 'land':175,183 'limit':148 'list':169 'live':218 'log':6,21,39,42 'lowpaymentfee API' 'lowpaymentfee.com':34 'made':111 'minim':202 'network':76 'no-api-key' 'note':161 'oper':51 'page':176,184,197 'paramet':124 'particular':164 'pay':2,17,57,158 'pay-per-cal':1,16 'pay-per-call logs' 'pay-per-request':56 'pay-per-us':157 'payment':109,123,132,137 'paywal':48 'per':3,18,58,159 'post':104 'premium':99 'premium API access' 'prompt':208 'protocol':115 'provid':35,50,172 'public':174 'pure':156 'rate':147 'request':59,105 'request/response':211 'requir':153 'resourc':94 'respond':220 'return':107,118,201 'schema':212 'settl':72 'showcas':185 'sign':136 'span':61 'specif':41,93 'specifi':140 'suit':54 'unavail':214 'unit':86 'upfront':150 'usdc':15,30,78,88 'usdc-settlement' 'use':77,160 'util':70,190 'valid':223 'via':10,25,112 'wallet':207 'x':131 'x-payment':130 'x402':11,26,47,114,224 'x402 audit endpoint' 'x402-payment'","prices":[{"id":"055b0482-d64c-45f8-b067-93b65ce0aa7c","listingId":"4b00fe32-c8c5-4e79-ace6-242aa8ae55d2","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/31","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:43:00.788Z"}],"sources":[{"listingId":"4b00fe32-c8c5-4e79-ace6-242aa8ae55d2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/audit/logs/31","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:43:00.788Z","lastSeenAt":"2026-04-27T07:04:40.833Z"}],"details":{"listingId":"4b00fe32-c8c5-4e79-ace6-242aa8ae55d2","quickStartSnippet":"# 1. Send POST to get the 402 challenge\ncurl -X POST https://lowpaymentfee.com/api/v1/audit/logs/31\n# Response: 402 with x402 challenge JSON\n\n# 2. Construct and sign payment, then retry with X-PAYMENT header\ncurl -X POST https://lowpaymentfee.com/api/v1/audit/logs/31 \\\n  -H \"X-PAYMENT: <signed-payment-payload>\"","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 ($0.02).","source_url":"https://lowpaymentfee.com/api/v1/audit/logs/31"},{"claim":"The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the 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/31"}],"useCases":["Retrieving audit log entries on a per-request payment basis","Programmatic access to log data without subscription or API key management","Agent-driven data retrieval with automatic micropayment settlement on Base"],"bestFor":["Agents or services needing one-off audit log lookups without account setup","Developers wanting zero-commitment, pay-as-you-go API access","x402-compatible clients settling micropayments in USDC on Base"],"notFor":["High-volume bulk log retrieval where per-call pricing becomes expensive","Users who need detailed API documentation or OpenAPI specs before integrating","Non-crypto users who cannot settle payments on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:28.608Z"},"updatedAt":"2026-04-27T07:04:40.833Z"}}