{"id":"f428842a-84e8-4982-83cc-58366d6cf877","shortId":"r43B5A","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. This specific endpoint (`/api/v1/generate/resource/74`) is listed as \"Premium API Access\" and accepts POST requests. Payment is settled in USDC (contract 0x8335…2913 on Base) at a cost of $0.02 per call (20,000 base units with 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.\n\nThe broader lowpaymentfee.com 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 utilities (geocoding, validation, conversion, generation). All endpoints are uniformly priced at $0.02 per request. However, the specific functionality behind `/api/v1/generate/resource/74` is not documented beyond the label \"Premium API Access,\" so the exact input/output schema and what this endpoint generates remain unclear.\n\nThe endpoint is live and returns a valid x402 challenge (HTTP 402) with version 1 of the protocol. The payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, and the maximum timeout for payment settlement is 300 seconds.","tags":[],"capabilities":["x402-payment","pay-per-request","base-network","usdc-settlement","no-api-key","post-endpoint"],"categories":["infrastructure","general"],"synonyms":["x402 API","pay-per-call API","micropayment API","USDC API","Base network API","lowpaymentfee","premium API access","crypto-paid endpoint"],"warnings":["The exact functionality of /api/v1/generate/resource/74 is undocumented — 'Premium API Access' is the only description available.","No input or output schema is provided; callers cannot know what request body to send or what response to expect.","All documentation pages (docs, api, pricing, README) returned only 'Connect wallet' with no substantive content.","The broader platform lists many endpoint categories but none map clearly to this specific resource/74 path."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/74","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/74","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no documentation on what this specific endpoint does, no input/output schema, no example responses, and the crawled docs/pricing/README pages are all blank beyond a 'Connect wallet' prompt. The listing is essentially a stub with confirmed liveness and pricing but unknown 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'/request':13,28 '0.02':12,27,80,158 '000':84 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':211 '0x8335':72 '1':202 '20':83 '2913':73 '300':220 '402':199 '6':88 'Base network API' 'USDC API' 'accept':63 'access':7,22,42,61,175 'across':116 'address':209 'advertis':114 'ai':126 'analysi':130 'analyt':120 'api':6,21,40,60,91,174 'attach':102 'base':9,24,50,75,85 'base-network' 'behind':165 'beyond':170 'broader':111 'call':4,19,82 'caller':100 'categori':118 'challeng':197 'classif':133 'collect':34 'commit':97 'contract':71 'convers':150 'cost':78 'crypto-paid endpoint' 'data':119,123 'decim':89 'document':169 'embed':134 'endpoint':41,54,115,153,184,189 'estim':144 'exact':178 'exchang':139 'export':124 'feed':138 'financ':135 'four':117 'function':164 'gas':143 'generat':151,185 'geocod':148 'header':106 'host':32 'howev':161 'http':198 'infrastructur':146 'input/output':179 'insight':125 'key':92 'label':172 'learn':128 'limit':94 'list':57 'live':191 'lowpaymentfee' 'lowpaymentfee.com':31,112 'machin':127 'maximum':214 'metric':121 'micropayment API' 'network':51 'no-api-key' 'pay':2,17,37 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':36 'payment':46,66,105,207,217 'per':3,18,38,81,159 'platform':113 'post':64 'post-endpoint' 'premium':5,20,59,173 'premium API access' 'price':137,156 'protocol':47,205 'quot':142 'rate':93,140 'recipi':208 'remain':186 'report':122 'request':39,65,109,160 'requir':99 'return':193 'schema':180 'second':221 'sentiment':129 'settl':68 'settlement':218 'simpli':101 'specif':53,163 'summar':132 'text':131 'timeout':215 'token':141 'unclear':187 'uniform':155 'unit':86 'upfront':96 'usdc':15,30,70 'usdc-settlement' 'util':147 'valid':149,195 'version':201 'via':10,25,43 'web3':136 'x402':11,26,45,104,196 'x402 API' 'x402-payment'","prices":[{"id":"9bc006e1-bda7-4345-8f16-0e5984e0987c","listingId":"f428842a-84e8-4982-83cc-58366d6cf877","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/74","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:04.689Z"}],"sources":[{"listingId":"f428842a-84e8-4982-83cc-58366d6cf877","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/74","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:04.689Z","lastSeenAt":"2026-04-22T13:30:32.804Z"}],"details":{"listingId":"f428842a-84e8-4982-83cc-58366d6cf877","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/74 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":{"url":"https://lowpaymentfee.com/api/v1/generate/resource/74","body":{},"method":"POST","headers":{"X-PAYMENT":"<x402-payment-token>","Content-Type":"application/json"}},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 version 1 challenge, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/74"},{"claim":"Payment is in USDC (USD Coin) on Base network at maxAmountRequired of 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/74"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing a premium generation endpoint without needing API keys or subscriptions","Programmatic pay-per-use API calls settled in USDC on Base","Agent-driven workflows that need instant, keyless API access with crypto micropayments"],"bestFor":["Developers who want zero-signup, pay-as-you-go API access","AI agents with Base USDC wallets needing on-demand endpoint calls","Projects that prefer crypto-native micropayments over traditional billing"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume use cases where $0.02/request adds up and bulk pricing is preferred","Developers without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:45.962Z"},"updatedAt":"2026-04-22T13:30:32.804Z"}}