{"id":"af89060e-6042-4b92-87c5-21d1db724766","shortId":"GEpg5Q","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.","tagline":"x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.\n\nThe specific endpoint `/api/v1/benefits/69` is labeled \"Premium API Access\" but its exact functionality is not documented beyond that title. The x402 challenge confirms it is live and accepts POST requests, returning application/json. The payment is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The endpoint uses x402 version 1 with the \"exact\" payment scheme and a 300-second timeout.\n\nDocumentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no description of what data or functionality this particular endpoint returns. The platform appears to be a demonstration or early-stage deployment of x402-gated microservices. Without additional documentation, the actual utility of this specific endpoint cannot be verified.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 api","micropayment api","usdc api","base network api","pay per call api","premium api access"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided","The specific functionality of /api/v1/benefits/69 is completely undocumented","Platform may be a demo or early-stage deployment; production reliability is unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/69","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/69","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no request/response schema, and no description of what the endpoint actually does. The 'Premium API Access' label is generic and uninformative. This is effectively a stub 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'/request':17,34 '0.02':16,33,88,157 '000':146 '0x8335':151 '1':168 '20':145 '2913':152 '300':176 '6':161 'accept':137 'access':42,118 'actual':245 'addit':242 'ai':72 'analyt':71 'api':5,22,41,68,100,117,188 'appear':226 'application/json':141 'base':8,25,96,147,154 'base network api' 'base-network' 'beyond':126 'call':12,29 'cannot':251 'challeng':131 'commit':108 'confirm':132 'connect':197 'content':203 'data':70,217 'decim':162 'demonstr':230 'deploy':235 'descript':214 'doc':187 'document':125,179,243 'earli':233 'early-stag':232 'endpoint':6,23,36,53,81,112,164,222,250 'equal':156 'exact':121,171 'extrem':184 'financ':75 'function':122,219 'gate':3,20,239 'given':158 'host':60 'infrastructur':78 'json-response' 'key':101 'label':115 'learn':74 'limit':104 'live':135 'lowpaymentfee' 'lowpaymentfee.com':38,57 'machin':73 'mani':52 'micropayment api' 'microservic':240 'minimum':107 'network':97 'no-api-key' 'offer':54 'one':50 'openapi':207 'page':192 'particular':221 'pay':10,27,65 'pay per call api' 'pay-per-cal':9,26 'pay-per-request':64 'payment':46,143,172 'per':11,28,66,89 'platform':58,84,225 'post':138 'post-method' 'premium':4,21,40,116 'premium api access' 'price':86,189 'prompt':199 'protocol':47 'provid':39 'rate':103 'readm':191 'render':194 'request':67,90,139 'request/response':210 'requir':109 'return':140,223 'schema':211 'scheme':173 'second':177 'settl':91 'site':182 'span':69 'spars':185 'spec':208 'specif':111,249 'stage':234 'timeout':178 'titl':128 'unit':148 'usdc':14,31,93,150,159 'usdc api' 'usdc-settlement' 'use':165 'util':79,246 'varieti':62 'verifi':253 'version':167 'via':43 'wallet':198 'web3':76 'without':241 'x402':2,19,45,130,166,238 'x402 api' 'x402-gated':1,18,237 'x402-payment'","prices":[{"id":"6aea3ccb-89ee-4ca7-a287-3e173e7566fd","listingId":"af89060e-6042-4b92-87c5-21d1db724766","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/69","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:47.432Z"}],"sources":[{"listingId":"af89060e-6042-4b92-87c5-21d1db724766","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/69","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:47.432Z","lastSeenAt":"2026-04-22T01:01:58.813Z"}],"details":{"listingId":"af89060e-6042-4b92-87c5-21d1db724766","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/69 \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/benefits/69"},{"claim":"All endpoints on the platform 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 APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Testing x402 payment protocol integration with a low-cost endpoint","Demonstrating pay-per-request API consumption without API keys","Exploring Base-network USDC micropayment flows"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need a cheap test endpoint for x402 integration","Projects exploring keyless, pay-per-call API patterns"],"notFor":["Production workloads requiring documented, well-specified API contracts","Users who need detailed request/response schemas before integrating","Anyone needing non-crypto payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.89Z"},"updatedAt":"2026-04-22T01:01:58.813Z"}}