{"id":"21fa9d1d-1b79-4972-ab99-b71e20c810c1","shortId":"f74rBa","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.","tagline":"x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.","description":"This endpoint is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. The specific resource at `/api/v1/generate/resource/84` is listed as \"Premium API Access\" but its exact functionality is not documented beyond that label. It is one of many endpoints on the platform, all priced uniformly at $0.02 per request.\n\nPayment is handled via the x402 protocol on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The challenge advertises a `maxAmountRequired` of 20000 base units, which at 6 decimals equals $0.02. The endpoint accepts POST requests and returns `application/json`. No API keys or rate limits are required — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.\n\nDocumentation is extremely sparse. The `/docs`, `/pricing`, `/api`, and `/README` pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what \"Premium API Access\" actually returns. The platform's landing page lists sibling endpoints (sentiment analysis, summarization, geocoding, etc.) but does not clarify what resource/84 specifically does. Prospective callers should be aware that without documentation, the behavior of this endpoint is essentially unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key"],"categories":["api","infrastructure"],"synonyms":["lowpaymentfee","x402 api","pay-per-call api","USDC micropayment api","Base network api","premium api access"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all return only a 'Connect wallet' prompt with no content.","The exact functionality of /api/v1/generate/resource/84 ('Premium API Access') is completely undocumented.","No OpenAPI schema, request format, or response examples are provided anywhere.","No terms of service, SLA, or support information found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/84","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/84","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.200","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear at $0.02 USDC per call. However, there is no documentation, no OpenAPI schema, no request/response examples, and no description of what this specific endpoint actually does. The docs pages are all empty wallet-connect stubs. This is effectively a stub 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'/api/v1/generate/resource/84':70 '/docs':168 '/pricing':169 '/readme':172 '/request':17,34 '0.02':16,33,100,132 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':117 '20000':124 '6':129 'Base network api' 'USDC micropayment api' 'accept':135 'access':76,200 'actual':201 'addit':183 'advertis':120 'ai/ml':59 'analysi':212 'analyt':58 'api':5,22,55,75,142,199 'application/json':140 'attach':151 'awar':228 'base':8,25,112,125 'base-network' 'behavior':233 'beyond':84 'call':12,29 'caller':149,225 'challeng':119 'clarifi':219 'collect':46 'connect':178 'content':184 'contract':116 'data':57,62 'decim':130 'descript':195 'document':83,163,231 'endpoint':6,23,36,92,134,210,236 'equal':131 'essenti':238 'etc':215 'exact':79 'exampl':192 'extrem':165 'finance/web3':61 'function':80 'gate':3,20 'geocod':214 'handl':105 'header':156 'infer':60 'infrastructur':64 'json-response' 'key':143 'label':86 'land':206 'limit':146 'list':72,208 'lowpaymentfee' 'lowpaymentfee.com':41 'mani':91 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'x402-protocol':48","prices":[{"id":"ae41f2cd-05b2-48e3-bae7-f6953c294b57","listingId":"21fa9d1d-1b79-4972-ab99-b71e20c810c1","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/84","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:34.316Z"}],"sources":[{"listingId":"21fa9d1d-1b79-4972-ab99-b71e20c810c1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/84","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:34.316Z","lastSeenAt":"2026-04-23T00:31:13.534Z"}],"details":{"listingId":"21fa9d1d-1b79-4972-ab99-b71e20c810c1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/84 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/84"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/84"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompt.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Paying per-request for API access without subscriptions or API keys","Integrating x402 payment-gated endpoints into agent workflows","Accessing utility or data services with crypto micropayments"],"bestFor":["Developers exploring x402 protocol integrations","Agents that can settle USDC payments on Base","Users who want no-signup, pay-as-you-go API access"],"notFor":["Anyone needing documented, well-specified API contracts","Use cases requiring free or fiat-only payment methods","Production systems that need SLA guarantees or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:47.397Z"},"updatedAt":"2026-04-23T00:31:13.534Z"}}