{"id":"68041fa3-7a0b-4aff-b3ec-629a823c0f4f","shortId":"JYsuWZ","kind":"x402","title":"Pay-per-call utility and generation API on Base via x402, $0.02/request in USDC.","tagline":"Pay-per-call utility and generation API on Base via x402, $0.02/request in USDC.","description":"lowpaymentfee.com hosts a collection of pay-per-request APIs accessible via the x402 payment protocol on the Base network. This specific endpoint (`/api/v1/generate/resource/128`) is listed under the \"Premium API Access\" category and falls within the Infrastructure / Generation group of services offered by the platform. Payment is settled in USDC on Base at $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are advertised; callers simply attach an x402 payment header to each POST 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 uniformly priced at $0.02 per call.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all resolve to a minimal \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The actual behavior of the `/api/v1/generate/resource/128` endpoint (what it generates, what inputs it accepts, what it returns) is unknown from the available material. The endpoint is confirmed live via a valid 402 challenge response.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","generation-api","no-api-key","post-method"],"categories":["infrastructure","utility"],"synonyms":["resource generation API","x402 generation endpoint","pay-per-call API","lowpaymentfee","USDC micropayment API","Base network API","402 payment API"],"warnings":["No documentation available — /docs, /api, /pricing, and /README all return only a 'Connect wallet' prompt with no content","No OpenAPI or schema specification; request and response formats are completely unknown","The purpose of /api/v1/generate/resource/128 is unclear — 'Premium API Access' and 'Generation' are the only descriptors","Platform appears to be a demo or early-stage project with placeholder endpoints across many categories"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/128","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/128","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation of request/response schemas, no examples, and no description of what the endpoint actually does beyond 'Premium API Access' / 'Generation'. The docs pages are all empty wallet-connect 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'/api/v1/generate/resource/128':56,207 '/docs':169 '/pricing':170 '/readme':173 '/request':14,30 '0.02':13,29,86,161 '000':90 '20':89 '402':233 '402 payment API' '6':94 'Base network API' 'USDC micropayment API' 'accept':215 'access':43,63 'across':120 'actual':203 'advertis':103,118 'ai':130 'analysi':134 'analyt':124 'api':8,24,42,62,97 'attach':106 'avail':201,223 'base':10,26,51,84,91 'base-network' 'behavior':204 'broader':116 'call':4,20,163 'caller':104 'categori':64,122 'challeng':234 'classif':137 'collect':36 'confirm':228 'connect':180 'convers':153 'data':123,127 'decim':95 'detail':187 'document':164,196 'embed':138 'endpoint':55,119,156,208,226 'estim':148 'exampl':199 'exchang':143 'export':128 'extrem':166 'fall':66 'feed':142 'financ':139 'four':121 'gas':147 'generat':7,23,70,154,211 'generation-api' 'geocod':151 'group':71 'header':110 'host':34 'infrastructur':69,150 'input':213 'insight':129 'key':98 'learn':132 'limit':101 'list':58 'live':229 'lowpaymentfee' 'lowpaymentfee.com':33 'machin':131 'materi':224 'metric':125 'minim':179 'network':52 'no-api-key' 'offer':74 'openapi':191 'page':174 'pay':2,18,39 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':38 'payload':200 'payment':47,78,109 'per':3,19,40,87,162 'platform':77,117 'post':113 'post-method' 'premium':61 'price':141,159 'prompt':182 'protocol':48 'quot':146 'rate':100,144 'report':126 'request':41,88,114 'request/response':194 'resolv':176 'resource generation API' 'respons':235 'return':218 'schema':195 'sentiment':133 'servic':73 'settl':80 'simpli':105 'spars':167 'spec':192 'specif':54 'summar':136 'technic':186 'text':135 'token':145 'uniform':158 'unit':92 'unknown':220 'usdc':16,32,82 'usdc-settlement' 'util':5,21 'valid':152,232 'via':11,27,44,230 'wallet':181 'web3':140 'within':67 'x402':12,28,46,108 'x402 generation endpoint' 'x402-payment'","prices":[{"id":"e6d072b0-a0ef-4ad8-b620-c06437663c51","listingId":"68041fa3-7a0b-4aff-b3ec-629a823c0f4f","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/128","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:15.843Z"}],"sources":[{"listingId":"68041fa3-7a0b-4aff-b3ec-629a823c0f4f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/128","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:15.843Z","lastSeenAt":"2026-04-28T14:04:04.721Z"}],"details":{"listingId":"68041fa3-7a0b-4aff-b3ec-629a823c0f4f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/128 \\\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":"Endpoint returns a valid x402 402 challenge with USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/128"},{"claim":"All endpoints priced at $0.02 per request with no API keys or rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/128"},{"claim":"Documentation pages resolve to minimal 'Connect wallet' prompts","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Generating resources on-demand with per-call USDC micropayments","Integrating pay-as-you-go infrastructure utilities into agent workflows","Testing x402 payment protocol integrations on Base"],"bestFor":["Developers exploring x402 payment protocol on Base","Agents needing keyless, pay-per-call utility endpoints","Low-volume or sporadic API usage without subscription commitments"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","High-volume production workloads where $0.02/call adds up significantly","Anyone who needs to understand exact input/output schemas before calling"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:42.426Z"},"updatedAt":"2026-04-28T14:04:04.721Z"}}