{"id":"0ea16ca1-6cfd-402b-acd8-1fab98c273a9","shortId":"5qCm3f","kind":"x402","title":"x402-payable API suite on Base: AI, analytics, finance, and utility endpoints at $0.02/request.","tagline":"x402-payable API suite on Base: AI, analytics, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com offers a collection of pay-per-call API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/generate/resource/180` is listed under \"Premium API Access\" and accepts POST requests settled in USDC (USD Coin) on Base. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (6 decimals), which equals $0.02 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 uniformly at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nDocumentation 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 schema, no request/response examples, and no description of what the `/api/v1/generate/resource/180` endpoint actually generates or what input it expects. The endpoint is live (returns a valid 402 challenge), but without documentation it is unclear what payload to send or what response to expect.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint","data-generation"],"categories":["infrastructure","utility"],"synonyms":["x402 API","pay-per-call API","micropayment API","USDC API","Base network API","lowpaymentfee","generation endpoint","resource generation"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or schema describing request parameters or response format for this endpoint.","The purpose of '/api/v1/generate/resource/180' is unknown — 'Premium API Access' is a generic label with no specifics.","Cannot verify what the endpoint actually returns without making a paid request."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/180","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/180","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 payments on Base at $0.02/request. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The purpose of this specific endpoint ('generate/resource/180') is entirely 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'/request':16,32 '0.02':15,31,94,143 '000':85 '20':84 '402':210 '6':90 'Base network API' 'USDC API' 'accept':66 'access':44,64 'across':102 'actual':196 'advertis':100 'ai':8,24,112 'analysi':116 'analyt':9,25,106 'api':4,20,42,63,148,164 'base':7,23,52,75,86 'base-network' 'broader':98 'call':41 'categori':104 'challeng':78,211 'classif':119 'coin':73 'collect':36 'commit':156 'connect':173 'content':179 'convers':135 'cost':82 'data':105,109 'data-generation' 'decim':91 'descript':190 'doc':163 'document':158,214 'embed':120 'endpoint':13,29,43,56,101,138,195,204 'equal':93 'estim':130 'exampl':187 'exchang':125 'expect':202,226 'export':110 'extrem':160 'feed':124 'financ':10,26,121 'four':103 'gas':129 'generat':136,197 'generation endpoint' 'geocod':133 'indic':79 'infrastructur':132 'input':200 'insight':111 'key':149 'learn':114 'limit':152 'list':60 'live':206 'lowpaymentfee' 'lowpaymentfee.com':33 'machin':113 'maximum':81 'metric':107 'micropayment API' 'minimum':155 'network':53 'no-api-key' 'offer':34 'openapi':183 'page':168 'pay':39 'pay-per-cal':38 'pay-per-call API' 'pay-per-request' 'payabl':3,19 'payload':219 'payment':48 'per':40,95,144 'platform':99 'post':67 'post-endpoint' 'premium':62 'price':123,140,165 'prompt':175 'protocol':49 'quot':128 'rate':126,151 'readm':167 'render':170 'report':108 'request':68,96,145 'request/response':186 'requir':157 'resource generation' 'respons':224 'return':207 'schema':184 'send':221 'sentiment':115 'settl':69 'spars':161 'specif':55 'suit':5,21 'summar':118 'text':117 'token':127 'unclear':217 'uniform':141 'unit':87 'usd':72 'usdc':71,89 'usdc-settlement' 'util':12,28 'valid':134,209 'via':45 'wallet':174 'web3':122 'without':213 'x402':2,18,47,77 'x402 API' 'x402-payable':1,17 'x402-payment'","prices":[{"id":"338afdb0-2537-497d-9776-eb14ece1fdfa","listingId":"0ea16ca1-6cfd-402b-acd8-1fab98c273a9","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/180","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:48.122Z"}],"sources":[{"listingId":"0ea16ca1-6cfd-402b-acd8-1fab98c273a9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/180","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:48.122Z","lastSeenAt":"2026-04-28T20:04:14.044Z"}],"details":{"listingId":"0ea16ca1-6cfd-402b-acd8-1fab98c273a9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/180 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/180"},{"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":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/180"}],"useCases":["Programmatic resource generation via a single POST request with crypto micropayment","Agent-driven API consumption without pre-registration or API key management","Exploring x402 payment protocol integration on Base network"],"bestFor":["Developers experimenting with x402 payment-gated APIs","AI agents that need keyless, pay-per-call endpoint access","Projects requiring low-friction crypto-settled API calls on Base"],"notFor":["Production workloads requiring documented request/response schemas","Users who need detailed API documentation or SDKs before integrating","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:46.762Z"},"updatedAt":"2026-04-28T20:04:14.044Z"}}