{"id":"9bfe5b42-d5b2-49d3-a96c-7449681baa88","shortId":"4bQ3d8","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints 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 specific endpoint `/api/v1/benefits/2` is listed under the provider's umbrella as \"Premium API Access,\" but the crawled documentation does not detail what data or functionality this particular route returns. The x402 challenge confirms the endpoint is live: it accepts POST requests, settles in USDC (contract 0x8335…2913 on Base), and requires a maximum payment of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The payment is directed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nBecause the provider's docs pages (docs, pricing, README) all render only a \"Connect wallet\" prompt with no further content, there is no schema documentation, example request/response, or detailed description of what this endpoint actually returns. Prospective callers should be aware that the exact response payload is unknown from public documentation.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method"],"categories":["api-gateway","misc"],"synonyms":["premium API","lowpaymentfee","x402 API","pay-per-call API","USDC API access","Base network API","micropayment API"],"warnings":["No documentation available — all doc/pricing/README pages show only 'Connect wallet' with no content.","The exact response schema and purpose of /api/v1/benefits/2 are undocumented; 'Premium API Access' is the only description.","No OpenAPI or output schema provided beyond the x402 challenge metadata."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/2","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/benefits/2","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 there is zero documentation on what this endpoint actually returns. No OpenAPI spec, no example responses, and all doc pages render only a wallet-connect prompt. The endpoint's purpose beyond its title is 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'/request':13,28 '0.02':12,27,73,153 '000':149 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':165 '0x8335':138 '20':148 '2913':139 '300':168 '6':157 'Base network API' 'USDC API access' 'accept':131 'access':7,22,38,106 'actual':205 'address':164 'ai':60 'analyt':59 'api':6,21,37,85,105 'awar':211 'base':9,24,81,141,150 'base-network' 'call':4,19 'caller':208 'categori':56 'challeng':124 'commit':90 'confirm':125 'connect':184 'content':190 'contract':137 'crawl':109 'data':58,115 'decim':158 'descript':200 'detail':113,199 'direct':162 'doc':175,177 'document':110,195,221 'endpoint':32,49,69,94,127,204 'exact':214 'exampl':196 'financ':63 'function':117 'given':154 'i.e':152 'includ':57 'infrastructur':66 'key':86 'learn':62 'limit':88 'list':97 'live':129 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':61 'mani':48 'maximum':145 'micropayment API' 'network':82 'no-api-key' 'offer':50 'one':46 'page':176 'particular':119 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payabl':76 'payload':216 'payment':42,146,160 'per':3,18,74 'post':132 'post-method' 'premium':5,20,36,104 'premium API' 'price':71,178 'prompt':186 'prospect':207 'protocol':43 'provid':35,53,100,173 'public':220 'rate':87 'readm':179 'render':181 'request':75,133 'request/response':197 'requir':91,143 'respons':215 'return':121,206 'rout':120 'schema':194 'second':169 'settl':134 'span':55 'specif':93 'timeout':170 'umbrella':102 'unit':151 'unknown':218 'usdc':15,30,78,136,155 'usdc-settlement' 'util':67 'via':10,25,39 'wallet':185 'web3':64 'x402':11,26,41,123 'x402 API' 'x402-payment'","prices":[{"id":"2b92dda0-e71f-4e47-8fb5-6496b2356e5e","listingId":"9bfe5b42-d5b2-49d3-a96c-7449681baa88","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/benefits/2","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:42.855Z"}],"sources":[{"listingId":"9bfe5b42-d5b2-49d3-a96c-7449681baa88","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/2","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:42.855Z","lastSeenAt":"2026-04-22T04:02:19.755Z"}],"details":{"listingId":"9bfe5b42-d5b2-49d3-a96c-7449681baa88","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/2 \\\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 HTTP 402 with x402 challenge, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/benefits/2"},{"claim":"All endpoints priced at $0.02/request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/2"},{"claim":"Provider offers endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing a premium API endpoint with per-call USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Testing x402 payment flows against a live, low-cost endpoint"],"bestFor":["Developers exploring x402 pay-per-call patterns","AI agents needing keyless, on-demand API access","Low-volume consumers who want no subscription commitments"],"notFor":["Users who need detailed API documentation before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.122Z"},"updatedAt":"2026-04-22T04:02:19.755Z"}}