{"id":"ddf0a2b2-ccf9-4368-8068-af8b370ba324","shortId":"9gC4Ec","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 platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories — all priced at $0.02 per request settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/benefits/23` is listed under the title \"Premium API Access\" but its exact functionality is not documented beyond that label. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires a payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised; access is purely pay-per-call.\n\nThe platform's documentation pages (docs, pricing, README) all resolve but render only a \"Connect wallet\" prompt, providing no additional technical detail about request/response schemas, parameters, or what data this particular endpoint returns. Without further documentation, the exact input parameters and output format remain unknown.","tags":[],"capabilities":["x402-payment","pay-per-call","usdc-settlement","base-network","no-api-key","no-rate-limit","json-response"],"categories":["api-marketplace","misc"],"synonyms":["premium API","pay-per-request API","x402 endpoint","lowpaymentfee","USDC micropayment API","Base network API","402 payment API"],"warnings":["No documentation available — docs, pricing, and README pages only show 'Connect wallet'","The exact functionality of /api/v1/benefits/23 is unknown; 'Premium API Access' is not descriptive","No request or response schema is provided","No OpenAPI spec or AI plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/23","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/23","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 does, what parameters it accepts, or what it returns. The docs, pricing, and README pages all render only a wallet-connect prompt. The endpoint title 'Premium API Access' is generic and 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'/request':13,28 '0.02':12,27,70,130 '000':119 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':141 '0x8335':124 '20':118 '2913':125 '300':144 '402 payment API' '6':134 'Base network API' 'USDC micropayment API' 'accept':110 'access':7,22,38,91,155 'addit':181 'address':140 'advertis':154 'ai':58 'analyt':57 'api':6,21,37,90,148 'base':9,24,78,120,127 'base-network' 'beyond':99 'call':4,19,161 'categori':66 'challeng':104 'confirm':105 'connect':176 'data':56,190 'decim':135 'detail':183 'doc':167 'document':98,165,197 'endpoint':32,49,82,107,193 'equal':129 'exact':94,199 'financ':61 'format':204 'function':95 'given':131 'infrastructur':64 'input':200 'json-response' 'key':149 'label':101 'learn':60 'limit':152 'list':85 'live':109 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':59 'made':138 'mani':48 'network':79 'no-api-key' 'no-rate-limit' 'offer':50 'one':46 'output':203 'page':166 'paramet':187,201 'particular':192 'pay':2,17,159 'pay-per-cal':1,16,158 'pay-per-call' 'pay-per-request API' 'payment':42,116,136 'per':3,18,71,160 'platform':53,163 'post':111 'premium':5,20,36,89 'premium API' 'price':68,168 'prompt':178 'protocol':43 'provid':35,179 'pure':157 'rate':151 'readm':169 'remain':205 'render':173 'request':72,112 'request/response':185 'requir':114 'resolv':171 'return':194 'schema':186 'second':145 'settl':73 'span':55 'specif':81 'technic':182 'timeout':146 'titl':88 'unit':121 'unknown':206 'usdc':15,30,75,123,132 'usdc-settlement' 'util':65 'via':10,25,39 'wallet':177 'web3':62 'without':195 'x402':11,26,41,103 'x402 endpoint' 'x402-payment'","prices":[{"id":"292c3488-c553-4841-9ee8-9ab0da31e2e7","listingId":"ddf0a2b2-ccf9-4368-8068-af8b370ba324","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/23","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:43.480Z"}],"sources":[{"listingId":"ddf0a2b2-ccf9-4368-8068-af8b370ba324","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/23","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:43.480Z","lastSeenAt":"2026-04-22T04:02:19.783Z"}],"details":{"listingId":"ddf0a2b2-ccf9-4368-8068-af8b370ba324","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/23 \\\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":"The endpoint returns a 402 challenge requiring 20,000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)","source_url":"https://lowpaymentfee.com/api/v1/benefits/23"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or services without API key registration","Agent-driven pay-per-call workflows settled in USDC on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers exploring x402 payment-gated APIs","AI agents that can settle USDC micropayments on Base","Users who want instant access without signup or rate limits"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet","Use cases requiring free or subscription-based pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.014Z"},"updatedAt":"2026-04-22T04:02:19.783Z"}}