{"id":"9b0f02df-b6d5-4656-b42e-336bfd88272c","shortId":"Akju6X","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-call with USDC.","tagline":"x402-gated premium API endpoint on Base, pay-per-call with USDC.","description":"This endpoint at lowpaymentfee.com is one of many x402-protocol-gated API resources offered by the provider. The specific resource `/api/v1/generate/resource/129` is labeled \"Premium API Access\" and accepts POST requests, returning application/json responses. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 exact payment scheme. The maximum amount required per call is 20,000 base units of USDC, which with 6 decimals equals $0.02 per request.\n\nThe broader lowpaymentfee.com platform advertises a suite of 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 listed at $0.02 per request with no API keys, no rate limits, and instant access.\n\nHowever, this specific resource path (`/api/v1/generate/resource/129`) does not clearly map to any of the documented endpoints on the landing page, and no detailed documentation, request/response schemas, or examples are available. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without knowing what this endpoint actually generates or returns, its practical utility is unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","json-response","post-method"],"categories":["infrastructure"],"synonyms":["premium API","x402 API","pay-per-request API","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["The resource path /api/v1/generate/resource/129 does not correspond to any endpoint listed on the provider's landing page","No documentation available: all doc/API/pricing/README pages return only 'Connect wallet'","No input or output schema provided; actual functionality is unknown","Cannot verify what this endpoint generates or returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/129","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/129","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 challenge, but the specific resource path doesn't match any documented endpoint. No documentation, request/response schemas, or examples are available—docs pages only show 'Connect wallet'. The actual functionality of this endpoint is 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'0.02':99,151 '000':89 '0x8335':73 '20':88 '2913':74 '6':96 'Base network API' 'USDC API' 'accept':57 'access':55,163 'across':111 'actual':217 'advertis':106 'ai':121 'amount':83 'analysi':125 'analyt':115 'api':5,19,41,54,156,196 'application/json':61 'avail':193 'base':8,22,68,90 'base-network' 'broader':103 'call':12,26,86 'categori':113 'classif':128 'clear':172 'connect':205 'content':211 'contract':72 'convers':144 'data':114,118 'decim':97 'detail':186 'doc':195 'document':178,187 'embed':129 'endpoint':6,20,30,110,147,179,216 'equal':98 'estim':139 'exact':78 'exampl':191 'exchang':134 'export':119 'feed':133 'financ':130 'four':112 'gas':138 'gate':3,17,40 'generat':145,218 'geocod':142 'howev':164 'infrastructur':141 'insight':120 'instant':162 'json-response' 'key':157 'know':213 'label':52 'land':182 'learn':123 'limit':160 'list':149 'lowpaymentfee' 'lowpaymentfee.com':32,104 'machin':122 'mani':36 'map':173 'maximum':82 'metric':116 'micropayment API' 'network':69 'offer':43 'one':34 'page':183,200 'path':168 'pay':10,24 'pay-per-cal':9,23 'pay-per-call' 'pay-per-request API' 'payment':63,79 'per':11,25,85,100,152 'platform':105 'post':58 'post-method' 'practic':222 'premium':4,18,53 'premium API' 'price':132,197 'prompt':207 'protocol':39 'provid':46 'quot':137 'rate':135,159 'readm':199 'report':117 'request':59,101,153 'request/response':188 'requir':84 'resourc':42,49,167 'respons':62 'return':60,202,220 'schema':189 'scheme':80 'sentiment':124 'settl':65 'specif':48,166 'substant':210 'suit':108 'summar':127 'text':126 'token':136 'unclear':225 'unit':91 'usdc':14,28,71,93 'usdc-settlement' 'use':70 'util':223 'valid':143 'via':75 'wallet':206 'web3':131 'without':212 'x402':2,16,38,77 'x402 API' 'x402-gated':1,15 'x402-payment' 'x402-protocol-gated':37","prices":[{"id":"7a1048b1-8042-49f8-84fc-bc58a99b20c8","listingId":"9b0f02df-b6d5-4656-b42e-336bfd88272c","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/129","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:46.415Z"}],"sources":[{"listingId":"9b0f02df-b6d5-4656-b42e-336bfd88272c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/129","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:46.415Z","lastSeenAt":"2026-04-28T16:33:02.203Z"}],"details":{"listingId":"9b0f02df-b6d5-4656-b42e-336bfd88272c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/129 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/129"},{"claim":"All endpoints are listed at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The provider offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/129"}],"useCases":["Programmatic access to a generation endpoint via x402 micropayment","Agent-driven API consumption without API keys or subscriptions","Pay-per-call resource generation settled in USDC on Base"],"bestFor":["Developers or agents wanting keyless, pay-per-call API access","x402-compatible agents that can settle USDC on Base","Exploring low-cost micropayment-gated endpoints"],"notFor":["Users needing detailed documentation or guaranteed SLAs before integrating","Use cases requiring known, well-documented input/output schemas","High-volume batch processing where per-call pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:43.949Z"},"updatedAt":"2026-04-28T16:33:02.203Z"}}