{"id":"db97a64d-9ec0-4688-93df-427ff0ef55d1","shortId":"2D5CDC","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 is part of a broader suite of x402-protocol APIs covering data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities. The specific endpoint `/api/v1/benefits/40` is listed as \"Premium API Access\" and is gated behind an x402 payment challenge on the Base network, accepting USDC (contract 0x8335…2913) at up to 20,000 base units per call — which, at 6 decimals for USDC, equals $0.02 per request.\n\nThe provider advertises a uniform $0.02/request pricing across all endpoints, with no API keys, no rate limits, no minimums, and instant access. Payment is settled on-chain via the x402 exact scheme. The endpoint accepts HTTP POST and returns application/json. However, the crawled documentation pages (docs, pricing, README) all rendered only a \"Connect wallet\" prompt with no further technical detail, so the actual request/response schema for this particular endpoint is unknown.\n\nBecause the endpoint path `/api/v1/benefits/40` does not appear in the provider's own landing-page catalog (which lists analytics, AI, finance, and utility endpoints), its specific functionality is unclear. The title \"Premium API Access\" is generic and does not describe what data or service is returned. Agents should treat this as an opaque paid endpoint until more documentation surfaces.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","json-response","http-post"],"categories":["api","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","premium API","402 payment required"],"warnings":["Endpoint path /api/v1/benefits/40 is not listed in the provider's own landing-page catalog — its actual functionality is unknown.","All documentation pages (docs, pricing, README) rendered only 'Connect wallet' with no usable content.","No request body schema or response schema is available; integration requires trial-and-error.","The generic title 'Premium API Access' provides no indication of what data or service is returned."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/40","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/40","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the endpoint path doesn't appear in the provider's own catalog. The purpose of '/api/v1/benefits/40' is entirely 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'/request':107 '0.02':10,24,98,106 '000':86 '0x8335':80 '20':85 '2913':81 '402 payment required' '6':93 'Base network API' 'USDC micropayment endpoint' 'accept':77,137 'access':6,20,64,123,208 'across':109 'actual':165 'advertis':103 'agent':221 'ai':194 'ai/ml':47 'analyt':46,193 'api':5,19,43,63,114,207 'appear':181 'application/json':142 'base':8,22,75,87 'base-network' 'behind':68 'broader':37 'call':90 'catalog':190 'chain':129 'challeng':72 'connect':155 'contract':79 'cover':44 'crawl':145 'data':45,51,216 'decim':94 'describ':214 'detail':162 'doc':148 'document':146,232 'endpoint':30,57,111,136,171,176,198,229 'equal':97 'exact':133 'financ':49,195 'function':201 'gate':3,17,67 'generic':210 'howev':143 'http':138 'http-post' 'infer':48 'infrastructur':53 'instant':122 'json-response' 'key':115 'land':188 'landing-pag':187 'limit':118 'list':60,192 'lowpaymentfee' 'lowpaymentfee.com':32 'minimum':120 'network':76 'on-chain':127 'opaqu':227 'page':147,189 'paid':228 'part':34 'particular':170 'path':177 'pay':9,23 'pay-per-call API' 'payment':71,124 'per':11,25,89,99 'per-request-pricing' 'post':139 'premium':4,18,62,206 'premium API' 'price':108,149 'prompt':157 'protocol':42 'provid':102,184 'rate':117 'readm':150 'render':152 'request':12,26,100 'request/response':166 'return':141,220 'schema':167 'scheme':134 'servic':218 'settl':126 'specif':56,200 'suit':38 'surfac':233 'technic':161 'titl':205 'treat':223 'unclear':203 'uniform':105 'unit':88 'unknown':173 'usdc':14,28,78,96 'usdc-settlement' 'util':54,197 'via':130 'wallet':156 'web3':50 'x402':2,16,41,70,132 'x402 API' 'x402-gated':1,15 'x402-payment' 'x402-protocol':40","prices":[{"id":"bbfa199b-0834-438b-ad99-ca5a788a31fa","listingId":"db97a64d-9ec0-4688-93df-427ff0ef55d1","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/40","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:44.680Z"}],"sources":[{"listingId":"db97a64d-9ec0-4688-93df-427ff0ef55d1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/40","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:44.680Z","lastSeenAt":"2026-04-22T01:01:58.683Z"}],"details":{"listingId":"db97a64d-9ec0-4688-93df-427ff0ef55d1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/40 \\\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 endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base with maxAmountRequired of 20000 base units.","source_url":"https://lowpaymentfee.com/api/v1/benefits/40"},{"claim":"The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/benefits/40"}],"useCases":["Programmatic access to a premium API resource with per-call USDC micropayments","Agent-driven workflows that need keyless, on-demand API access settled on Base","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Agents that can settle USDC micropayments per request","Use cases requiring keyless, no-rate-limit API access"],"notFor":["Users who need detailed documentation or well-defined schemas before integrating","High-volume consumers who prefer subscription-based pricing over per-call payments"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.013Z"},"updatedAt":"2026-04-22T01:01:58.683Z"}}