{"id":"7ef76d80-df6d-46a1-b380-377706765c12","shortId":"XX2Fuv","kind":"x402","title":"x402-gated premium API access on Base network, pay-per-request with USDC.","tagline":"x402-gated premium API access on Base network, pay-per-request with USDC.","description":"lowpaymentfee.com offers a suite of pay-per-request API endpoints gated behind the x402 payment protocol on the Base network. The specific endpoint `/api/v1/generate/resource/100` is listed as \"Premium API Access\" and accepts POST requests, returning application/json responses. Payment is made in USDC (asset 0x8335…2913) with a maximum amount of 20,000 units (likely 0.02 USDC given 6 decimals) per request.\n\nThe broader platform advertises endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nHowever, documentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/generate/resource/100` endpoint actually generates or what input it expects. The endpoint is confirmed live (402 challenge captured), but the actual functionality behind it remains unclear.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-payment","base-network","json-response","post-endpoint","no-api-key"],"categories":["infrastructure","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC API","Base network API","micropayment API","lowpaymentfee","premium API access","crypto-gated API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or request/response schema provided; the actual functionality of /api/v1/generate/resource/100 is unknown.","The endpoint description 'Premium API Access' is generic and does not describe what the endpoint does.","Cannot verify what data or service is returned after payment is made."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/100","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/generate/resource/100","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge, but there is zero documentation on what the endpoint actually does, what inputs it expects, or what it returns. No OpenAPI schema, no examples, and all doc pages are empty beyond a wallet connect prompt. The listing is effectively a 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'0.02':86,138 '000':83 '0x8335':75 '20':82 '2913':76 '402':205 '6':89 'Base network API' 'USDC API' 'accept':63 'access':6,21,61 'across':98 'actual':193,210 'advertis':96 'ai':108 'amount':80 'analysi':112 'analyt':102 'api':5,20,40,60,143,160 'application/json':67 'asset':74 'base':8,23,50 'base-network' 'behind':43,212 'broader':94 'captur':207 'categori':100 'challeng':206 'classif':115 'commit':151 'confirm':203 'connect':169 'convers':131 'crypto-gated API' 'data':101,105 'decim':90 'descript':187 'detail':176 'doc':159 'document':154 'embed':116 'endpoint':41,54,97,134,192,201 'estim':126 'exampl':184 'exchang':121 'expect':199 'export':106 'extrem':156 'feed':120 'financ':117 'four':99 'function':211 'gas':125 'gate':3,18,42 'generat':132,194 'geocod':129 'given':88 'howev':153 'infrastructur':128 'input':197 'insight':107 'json-response' 'key':144 'learn':110 'like':85 'limit':147 'list':57 'live':204 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':109 'made':71 'maximum':79 'metric':103 'micropayment API' 'minimum':150 'network':9,24,51 'no-api-key' 'offer':32 'openapi':180 'page':164 'pay':11,26,37 'pay-per-call API' 'pay-per-request':10,25,36 'payment':46,69 'per':12,27,38,91,139 'platform':95 'post':64 'post-endpoint' 'premium':4,19,59 'premium API access' 'price':119,136,161 'prompt':171 'protocol':47 'quot':124 'rate':122,146 'readm':163 'remain':214 'render':166 'report':104 'request':13,28,39,65,92,140 'request/response':183 'requir':152 'respons':68 'return':66 'schema':181 'sentiment':111 'spars':157 'specif':53 'suit':34 'summar':114 'technic':175 'text':113 'token':123 'unclear':215 'unit':84 'usdc':15,30,73,87 'usdc-payment' 'valid':130 'wallet':170 'web3':118 'x402':2,17,45 'x402 API' 'x402-gated':1,16 'x402-payment'","prices":[{"id":"60368620-964b-4c21-a6c7-0791cb4e8e97","listingId":"7ef76d80-df6d-46a1-b380-377706765c12","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/generate/resource/100","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:31:59.708Z"}],"sources":[{"listingId":"7ef76d80-df6d-46a1-b380-377706765c12","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/100","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:31:59.708Z","lastSeenAt":"2026-04-24T15:01:52.004Z"}],"details":{"listingId":"7ef76d80-df6d-46a1-b380-377706765c12","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/100\n# Returns 402 with x402 payment challenge.\n# Include X-PAYMENT header with valid payment proof to access the resource.","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 network with maxAmountRequired of 20000","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/100"},{"claim":"The platform advertises endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"Platform claims no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API resources with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API key management","Pay-as-you-go access to data, AI, finance, or utility endpoints"],"bestFor":["Developers wanting zero-commitment, pay-per-use API access","AI agents that can handle x402 payment flows autonomously","Users already on the Base network with USDC"],"notFor":["Users needing detailed API documentation or request/response schemas before integrating","High-volume consumers who need bulk pricing or SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:00.929Z"},"updatedAt":"2026-04-24T15:01:52.004Z"}}