{"id":"9e038e1c-eade-4994-9d32-1d032cda1dbc","shortId":"sYbgvg","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-protocol API marketplace that gates access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/generate/resource/82` is listed as \"Premium API Access\" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is made via the x402 `X-PAYMENT` header using the \"exact\" scheme — no API keys, subscriptions, or rate limits are required.\n\nThe broader platform advertises four categories of APIs: 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 utilities (geocoding, validation, conversion, generation). All endpoints are listed at the same $0.02/request price point. However, the specific resource/82 endpoint's exact functionality is not documented beyond the generic \"Premium API Access\" label.\n\nDocumentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawl. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what payload to send or what response to expect.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-micropayment","no-api-key","exact-scheme","post-endpoint"],"categories":["general","infrastructure"],"synonyms":["x402 API","micropayment API","pay-per-call API","USDC API","Base network API","lowpaymentfee","premium API access"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content","No OpenAPI or request/response schema provided; it is unknown what this endpoint actually does","The specific functionality of '/api/v1/generate/resource/82' is not described anywhere beyond the generic label 'Premium API Access'","Cannot verify what data or service is returned without making a paid request"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/82","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/82","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 402 challenge, confirming it accepts USDC on Base at $0.02/request. However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of resource/82 is entirely undocumented. The docs, pricing, and README pages are all empty beyond a wallet connect 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'/api/v1/generate/resource/82':67 '/docs':188 '/pricing':190 '/readme':192 '/request':17,34,162 '0.02':16,33,78,161 '000':82 '20':81 '402':229 '6':88 'Base network API' 'USDC API' 'access':45,73,181 'advertis':116 'ai':10,27,128 'analysi':132 'analyt':122 'api':4,21,41,72,105,120,180 'avail':217 'base':7,24,61,83 'behind':51 'beyond':176 'broader':114 'call':80 'categori':118 'challeng':230 'classif':135 'confirm':224 'connect':198 'content':204 'convers':152 'cost':75 'crawl':220 'data':9,26,121,125 'decim':89 'document':175,183,233 'embed':136 'endpoint':14,31,50,65,155,169,222 'estim':146 'exact':102,171 'exact-scheme' 'exampl':216 'exchang':141 'expect':245 'export':126 'extrem':185 'feed':140 'financ':11,28,137 'four':117 'function':172 'gas':145 'gate':3,20,44 'generat':153 'generic':178 'geocod':150 'header':99 'howev':165 'infrastructur':148 'insight':127 'key':106 'label':182 'learn':130 'limit':110 'list':69,157 'live':225 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':129 'made':92 'marketplac':42 'metric':123 'micropay':55 'micropayment API' 'network':62 'no-api-key' 'offer':8,25 'openapi':208 'page':193 'pay-per-call API' 'payload':238 'payment':90,98 'per':53,79 'per-request':52 'per-request-micropayment' 'platform':5,22,115 'point':164 'post-endpoint' 'premium':71,179 'premium API access' 'price':139,163 'prompt':200 'proper':228 'protocol':40 'quot':144 'rate':109,142 'render':195 'report':124 'request':54 'request/response':211 'requir':112 'resource/82':168 'respons':243 'return':226 'schema':212 'scheme':103 'send':240 'sentiment':131 'settl':56 'spars':186 'spec':209 'specif':64,167 'subscript':107 'substant':203 'summar':134 'text':133 'token':143 'unclear':236 'unit':84 'usag':215 'usdc':58,86 'usdc-base' 'use':100 'util':13,30,149 'valid':151 'varieti':48 'via':93 'wallet':199 'web3':138 'without':232 'x':97 'x-payment':96 'x402':2,19,39,95 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"0f7ffa59-b475-417e-b4fb-7795799ad5a5","listingId":"9e038e1c-eade-4994-9d32-1d032cda1dbc","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/82","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:48.201Z"}],"sources":[{"listingId":"9e038e1c-eade-4994-9d32-1d032cda1dbc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/82","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:48.201Z","lastSeenAt":"2026-04-22T12:03:14.094Z"}],"details":{"listingId":"9e038e1c-eade-4994-9d32-1d032cda1dbc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/82 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/82"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on the 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"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/82"}],"useCases":["Paying per-request for API access without subscriptions or API keys","Integrating x402-compatible agents with utility or data endpoints","Programmatic access to miscellaneous services via crypto micropayments"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-as-you-go API access on Base","Low-volume consumers who want no commitment pricing"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume production workloads requiring SLAs or guaranteed uptime","Users without USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:43.918Z"},"updatedAt":"2026-04-22T12:03:14.094Z"}}