{"id":"6b9760a7-67a0-42bd-a542-3e358bc17822","shortId":"Uek2MJ","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 per 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 lowpaymentfee.com platform, which hosts a variety of pay-per-call 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, rate limits, or commitments required.\n\nThe specific endpoint `/api/v1/benefits/14` is labeled \"Premium API Access\" but the crawled documentation does not clarify what data or functionality this particular route returns. It is not listed among the named endpoints on the homepage (analytics, AI, finance, utils), so its exact purpose is unclear. The x402 challenge confirms it is live, accepts POST requests, and requires a payment of up to 20,000 base units of USDC (i.e., $0.02) on Base. The payment is settled to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`.\n\nBecause the docs pages (docs, api, pricing, README) all returned only a \"Connect wallet\" prompt with no further content, there is no schema documentation, example request/response, or detailed description available for this endpoint. Prospective callers should be aware that the actual response payload is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","premium-api-access"],"categories":["api","misc"],"synonyms":["lowpaymentfee","low payment fee API","x402 API","pay-per-call API","USDC API","Base network API","micropayment API"],"warnings":["The exact functionality of /api/v1/benefits/14 is undocumented — it is not listed among the named endpoints on the homepage.","All documentation pages (docs, api, pricing, README) returned only 'Connect wallet' with no usable content.","No request or response schema is available; callers must pay before discovering what the endpoint returns."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/14","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/14","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, but there is no documentation, no OpenAPI schema, no example requests or responses, and the purpose of /api/v1/benefits/14 is not explained anywhere in the crawled material. Effectively a stub 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'0.02':10,24,82,170 '000':164 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':179 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':184 '20':163 'Base network API' 'USDC API' 'accept':153 'access':6,20,36,109 'actual':225 'address':178 'ai':66,137 'among':129 'analyt':65,136 'api':5,19,35,62,94,108,190 'avail':214 'awar':222 'base':8,22,90,165,172 'base-network' 'call':61 'caller':219 'challeng':148 'clarifi':116 'commit':99 'confirm':149 'connect':197 'content':203 'contract':183 'crawl':112 'data':64,118 'descript':213 'detail':212 'doc':187,189 'document':113,208 'endpoint':30,47,75,103,132,217 'exact':142 'exampl':209 'financ':69,138 'function':120 'gate':3,17 'homepag':135 'host':54 'i.e':169 'infrastructur':72 'key':95 'label':106 'learn':68 'limit':97 'list':128 'live':152 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':67 'mani':46 'micropayment API' 'name':131 'network':91 'no-api-key' 'offer':48 'one':44 'page':188 'particular':122 'pay':9,23,59 'pay-per-cal':58 'pay-per-call API' 'pay-per-request' 'payload':227 'payment':40,159,174 'per':11,25,60,83 'platform':52,78 'post':154 'premium':4,18,34,107 'premium-api-access' 'price':80,191 'prompt':199 'prospect':218 'protocol':41 'provid':33 'purpos':143 'rate':96 'readm':192 'request':12,26,84,155 'request/response':210 'requir':100,157 'respons':226 'return':124,194 'rout':123 'schema':207 'settl':85,176 'span':63 'specif':102 'unclear':145 'unit':166 'unknown':229 'usdc':14,28,87,168,182 'usdc-settlement' 'use':180 'util':73,139 'varieti':56 'via':37 'wallet':198 'web3':70 'x402':2,16,39,147 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"85e891f5-a80d-4400-8e3a-ec50f1fb032a","listingId":"6b9760a7-67a0-42bd-a542-3e358bc17822","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/14","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:44.661Z"}],"sources":[{"listingId":"6b9760a7-67a0-42bd-a542-3e358bc17822","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/14","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:44.661Z","lastSeenAt":"2026-04-22T04:02:19.814Z"}],"details":{"listingId":"6b9760a7-67a0-42bd-a542-3e358bc17822","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/14 \\\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/14"},{"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":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/14"},{"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 functionality behind a low-cost paywall","Demonstrating x402 payment protocol integration","Agent-driven API consumption without pre-registration or API keys"],"bestFor":["Developers experimenting with x402 payment flows","Agents that need keyless, pay-per-call API access on Base","Low-cost micropayment API consumption"],"notFor":["Users who need detailed documentation or guaranteed SLAs before calling","High-volume use cases where $0.02/request adds up significantly","Anyone needing to know the exact response schema before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.013Z"},"updatedAt":"2026-04-22T04:02:19.814Z"}}