{"id":"6b925d73-449c-40f1-b950-5910682159ca","shortId":"chG5Wj","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","description":"This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories. The specific resource `/api/v1/generate/resource/58` is listed as \"Premium API Access\" and is gated behind the x402 payment protocol. Each call costs up to 20,000 units of USDC (on Base network), which given USDC's 6-decimal precision equates to $0.02 per request — consistent with the site's uniform $0.02/request pricing.\n\nThe platform advertises no API keys, no rate limits, and instant access. Payment is made via the x402 `exact` scheme, settling in USDC (contract `0x8335…2913`) on the Base L2 network. The endpoint accepts HTTP POST requests and returns `application/json`. However, the actual functionality behind \"Premium API Access\" at this specific resource path (`/resource/58`) is not documented — the site provides no schema, example payloads, or description of what this particular endpoint generates or returns.\n\nDocumentation pages (`/docs`, `/api`, `/pricing`, `/README`) all resolve to a minimal \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no input/output schema beyond the x402 challenge metadata, and no usage examples. The endpoint is live and responds with a valid x402 402 challenge, but the lack of documentation makes it impossible to determine what data or service is actually delivered upon payment.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","http-post"],"categories":["infrastructure"],"synonyms":["premium API","x402 API","pay-per-call","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["No documentation exists for this specific endpoint — its actual functionality is unknown","All documentation pages (/docs, /api, /pricing, /README) contain only a 'Connect wallet' prompt with no content","No OpenAPI spec or input/output schema available","The label 'Premium API Access' is generic and does not describe what the endpoint returns","Cannot verify what you receive after payment without paying first"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/58","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/58","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it exists and accepts payments. However, there is zero documentation on what the endpoint actually does — no input schema, no output schema, no examples, and no description beyond the generic label 'Premium API Access'. All doc pages are empty wallet-connect 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'/api/v1/generate/resource/58':56 '/docs':181 '/pricing':183 '/readme':184 '/request':103 '/resource/58':158 '0.02':93,102 '000':77 '0x8335':129 '20':76 '2913':130 '402':224 '6':88 'Base network API' 'USDC API' 'accept':138 'access':62,116,152 'across':45 'actual':147,241 'advertis':107 'ai/ml':48 'analyt':47 'api':5,19,44,61,109,151 'application/json':144 'base':8,22,82,133 'behind':66,149 'beyond':205 'broader':37 'call':43,72 'categori':52 'challeng':208,225 'connect':190 'consist':96 'content':196 'contract':128 'cost':73 'data':46,237 'decim':89 'deliv':242 'descript':170 'determin':235 'document':161,179,230 'endpoint':6,20,30,137,175,215 'equat':91 'exact':123 'exampl':167,213 'finance/web3':49 'function':148 'gate':3,17,65 'generat':176 'given':85 'howev':145 'http':139 'http-post' 'imposs':233 'infrastructur':51 'input/output':203 'instant':115 'json-response' 'key':110 'l2':134 'lack':228 'limit':113 'list':58 'live':217 'lowpaymentfee' 'lowpaymentfee.com':32 'made':119 'make':231 'metadata':209 'micropayment API' 'minim':189 'network':83,135 'offer':39 'openapi':200 'page':180 'part':34 'particular':174 'path':157 'pay':10,24,41 'pay-per-cal':40 'pay-per-call' 'pay-per-request':9,23 'payload':168 'payment':69,117,244 'per':11,25,42,94 'platform':38,106 'post':140 'precis':90 'premium':4,18,60,150 'premium API' 'price':104 'prompt':192 'protocol':70 'provid':164 'rate':112 'request':12,26,95,141 'resolv':186 'resourc':55,156 'respond':219 'return':143,178 'schema':166,204 'scheme':124 'servic':239 'settl':125 'site':99,163 'spec':201 'specif':54,155 'substant':195 'uniform':101 'unit':78 'upon':243 'usag':212 'usdc':14,28,80,86,127 'usdc-base' 'valid':222 'via':120 'wallet':191 'x402':2,16,68,122,207,223 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"b26a3075-eb33-46f6-9ca6-0b0981355ed7","listingId":"6b925d73-449c-40f1-b950-5910682159ca","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/58","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:09.318Z"}],"sources":[{"listingId":"6b925d73-449c-40f1-b950-5910682159ca","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/58","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:09.318Z","lastSeenAt":"2026-04-29T00:08:13.304Z"}],"details":{"listingId":"6b925d73-449c-40f1-b950-5910682159ca","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/58\n# Returns 402 with x402 challenge; include X-PAYMENT header with valid payment proof to access.","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 USDC units on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/58"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/58"},{"claim":"Documentation pages resolve to minimal 'Connect wallet' content only","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to an undocumented generation endpoint via x402 micropayment","Demonstrating x402 payment protocol integration on Base network","Agent-driven API consumption without API keys"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can handle x402 challenges and USDC payments on Base","Users who want keyless, pay-per-request API access"],"notFor":["Anyone needing documented input/output schemas before paying","Production use cases requiring SLA guarantees or support","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:00.479Z"},"updatedAt":"2026-04-29T00:08:13.304Z"}}