{"id":"d111e16a-f3a1-4fb9-8e8a-ad69db033aa4","shortId":"G7UNcH","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. The specific resource `/api/v1/benefits/90` is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. 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 x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract `0x8335...2913` on Base). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. Payment is made via the `exact` scheme with a 300-second timeout. The response MIME type is `application/json`.\n\nHowever, the specific functionality behind `/api/v1/benefits/90` is not documented on the site's landing page or in any crawled material. The site lists numerous other endpoints (analytics, AI, finance, utilities) but does not describe a `/benefits/` path. Documentation, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without knowing what data or service this particular endpoint returns, consumers should treat this as an opaque premium resource until further documentation is available.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["api","payments"],"synonyms":["premium API","x402 endpoint","pay-per-call API","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["The /api/v1/benefits/90 path is not listed among the site's documented endpoints — its purpose is unknown","All documentation pages (/docs, /pricing, /README, /api) returned no substantive content beyond 'Connect wallet'","No request body schema or response schema is available for this endpoint","Cannot verify what data or service is returned after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/90","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/90","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 ($0.02 USDC on Base). However, the specific functionality of /api/v1/benefits/90 is completely undocumented — it does not appear in the site's listed endpoints, and all documentation pages returned only 'Connect wallet' with no content. No request/response schema is 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'/benefits':184 '/request':13,28 '0.02':12,27,75,130 '000':121 '0x8335':111 '20':120 '2913':112 '300':140 '6':126 'Base network API' 'USDC API' 'accept':102 'access':7,22,38 'ai':61,176 'amount':117 'analyt':60,175 'api':6,21,37,87 'application/json':148 'avail':225 'base':9,24,83,114,122 'base-network' 'behind':153 'call':4,19 'categori':69 'challeng':96 'commit':92 'confirm':97 'connect':195 'consum':212 'content':201 'contract':110 'crawl':167 'data':59,205 'decim':127 'describ':182 'document':157,186,223 'endpoint':32,52,71,99,174,210 'equal':129 'exact':136 'financ':64,177 'function':152 'howev':149 'infrastructur':67 'json-response' 'key':88 'know':203 'land':162 'learn':63 'limit':90 'list':171 'live':101 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':62 'made':133 'mani':51 'materi':168 'maximum':116 'micropayment API' 'mime':145 'network':84 'no-api-key' 'numer':172 'offer':53 'one':49 'opaqu':218 'page':163,190 'particular':209 'path':185 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payabl':78 'payment':42,107,131 'per':3,18,76 'platform':56 'post':103 'post-method' 'premium':5,20,36,219 'premium API' 'price':73,187 'prompt':197 'protocol':43 'provid':35 'rate':89 'readm':189 'request':77,104 'requir':93,118 'resourc':46,220 'respons':144 'return':192,211 'scheme':137 'second':141 'servic':207 'settl':106 'site':160,170 'span':58 'specif':45,151 'substant':200 'timeout':142 'treat':214 'type':146 'unit':123 'usdc':15,30,80,109,125 'usdc-settlement' 'util':68,178 'via':10,25,39,134 'wallet':196 'web3':65 'without':202 'x402':11,26,41,95 'x402 endpoint' 'x402-payment'","prices":[{"id":"03012c99-44a4-4dbf-998c-cea95e05a53b","listingId":"d111e16a-f3a1-4fb9-8e8a-ad69db033aa4","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/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T20:29:35.894Z"}],"sources":[{"listingId":"d111e16a-f3a1-4fb9-8e8a-ad69db033aa4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/90","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T20:29:35.894Z","lastSeenAt":"2026-04-22T01:01:59.186Z"}],"details":{"listingId":"d111e16a-f3a1-4fb9-8e8a-ad69db033aa4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/90 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The site lists endpoints priced at $0.02/request with no API keys, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge shows maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/benefits/90"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/90"}],"useCases":["Accessing premium data or services with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to undocumented premium resources"],"bestFor":["Developers or agents wanting keyless, pay-per-call API access","Users comfortable paying in USDC on Base L2","Scenarios requiring low-friction, no-commitment API consumption"],"notFor":["Users who need detailed documentation of what the endpoint returns before paying","Anyone who cannot transact in USDC on the Base network","High-volume use cases where per-request pricing may add up without bulk discounts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.552Z"},"updatedAt":"2026-04-22T01:01:59.186Z"}}