{"id":"5d7ee55b-78e8-41cd-bfac-2d5606514cc5","shortId":"RGxYyJ","kind":"x402","title":"Pay-per-request premium API access on Base via x402 — $0.02/call in USDC.","tagline":"Pay-per-request premium API access on Base via x402 — $0.02/call in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific resource `/api/v1/policies/67` is one of many endpoints offered by the platform, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract 0x8335…2913 on Base) to address 0x1A2B…85F3. The maxAmountRequired of 20000 base units translates to $0.02 (USDC uses 6 decimals). The payment timeout is 300 seconds. The endpoint returns application/json responses.\n\nHowever, the specific functionality behind `/api/v1/policies/67` is not documented — the name \"Premium API Access\" is generic and does not clarify what data or service this particular policy endpoint returns. The platform's docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further documentation. Without an OpenAPI schema, request/response examples, or detailed docs, the actual capabilities of this specific endpoint remain unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","no-api-key","post-method"],"categories":["api","infrastructure"],"synonyms":["premium API","x402 endpoint","pay-per-call API","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["The specific purpose and data returned by /api/v1/policies/67 is unknown — 'Premium API Access' is not descriptive","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content","No OpenAPI schema or request/response examples are available","Cannot verify what input the POST body expects or what the response contains"],"endpointUrl":"https://lowpaymentfee.com/api/v1/policies/67","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/policies/67","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/policies/67 is entirely undocumented. No OpenAPI schema, no request/response examples, and all doc pages render only a wallet-connect prompt. The endpoint name 'Premium API Access' is generic and 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'/call':13,28 '0.02':12,27,79,131 '0x1a2b':121 '0x8335':115 '20000':126 '2913':116 '300':140 '6':134 '85f3':122 'Base network API' 'USDC API' 'accept':106 'access':7,22,38,160 'actual':205 'address':120 'ai':63 'analyt':62 'api':6,21,37,91,159,182 'application/json':145 'base':9,24,87,118,127 'behind':151 'capabl':206 'categori':59 'challeng':100 'clarifi':166 'commit':96 'confirm':101 'connect':188 'contract':114 'data':61,168 'decim':135 'detail':202 'doc':179,203 'document':155,194 'endpoint':32,52,72,103,143,174,210 'exampl':200 'financ':66 'function':150 'generic':162 'howev':147 'includ':60 'infrastructur':69 'json-api' 'key':92 'learn':65 'limit':94 'live':105 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':64 'mani':51 'maxamountrequir':124 'micropayment API' 'name':157 'network':88 'no-api-key' 'offer':53 'one':49 'openapi':197 'page':183 'particular':172 'pay':2,17 'pay-per-call API' 'pay-per-request':1,16 'payabl':82 'payment':42,111,137 'per':3,18,80 'platform':56,75,177 'polici':173 'post':107 'post-method' 'premium':5,20,36,158 'premium API' 'price':77,180 'prompt':190 'protocol':43 'provid':35 'rate':93 'remain':211 'render':185 'request':4,19,81,108 'request/response':199 'requir':97 'resourc':46 'respons':146 'return':144,175 'schema':198 'second':141 'servic':170 'settl':110 'span':58 'specif':45,149,209 'timeout':138 'translat':129 'unclear':212 'unit':128 'usdc':15,30,84,113,132 'usdc-base' 'use':133 'util':70 'via':10,25,39 'wallet':189 'web3':67 'without':195 'x402':11,26,41,99 'x402 endpoint' 'x402-payment'","prices":[{"id":"2bc248e8-5aec-4a15-9e95-5c0486b1aca9","listingId":"5d7ee55b-78e8-41cd-bfac-2d5606514cc5","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/policies/67","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:52:02.655Z"}],"sources":[{"listingId":"5d7ee55b-78e8-41cd-bfac-2d5606514cc5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/policies/67","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:52:02.655Z","lastSeenAt":"2026-04-22T07:01:14.778Z"}],"details":{"listingId":"5d7ee55b-78e8-41cd-bfac-2d5606514cc5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/policies/67 \\\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":"All endpoints priced at $0.02 per request with no API keys, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Payment in USDC on Base network, maxAmountRequired 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/policies/67"},{"claim":"Platform offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API resource with per-call USDC micropayments","Agent-driven workflows that need keyless, on-demand API access on Base","Integrating pay-as-you-go API calls without subscription commitments"],"bestFor":["Developers wanting zero-commitment, per-request API billing","AI agents that can settle x402 payments in USDC on Base","Users who prefer crypto-native micropayments over API key management"],"notFor":["Users who need detailed documentation or OpenAPI specs before integrating","High-volume use cases where per-request pricing may add up","Anyone requiring fiat-only payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:02.4Z"},"updatedAt":"2026-04-22T07:01:14.778Z"}}