{"id":"01fc50e9-5623-435e-acbb-653698a2b37a","shortId":"PrnDWN","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":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific resource `/api/resource/45` is one of many endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the `exact` scheme to a specified wallet address, with a maximum amount of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals). The response MIME type is `application/json`. The platform advertises a broad suite of endpoints covering metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation.\n\nHowever, the specific functionality of `/api/resource/45` is not documented — the title is simply \"Premium API Access\" with no further detail on what data or service this particular resource returns. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional documentation. Without an OpenAPI schema, example requests/responses, or detailed docs, the exact input/output contract for this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key","json-response","post-method"],"categories":["api","infrastructure"],"synonyms":["x402 API","pay-per-request API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The specific functionality of /api/resource/45 is undocumented — the title 'Premium API Access' is generic and uninformative.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.","No OpenAPI schema, no example request/response, and no input/output contract available.","The platform lists many endpoints but it is unclear whether they all function or are placeholders."],"endpointUrl":"https://lowpaymentfee.com/api/resource/45","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/resource/45","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base), but the specific resource /api/resource/45 has no documentation, no schema, no example requests or responses, and the docs pages are empty beyond a wallet-connect prompt. The actual functionality of this endpoint is 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'/request':13,28 '0.02':12,27,76,134 '000':128 '20':127 '6':138 'Base network API' 'USDC micropayment API' 'accept':107 'access':7,22,38,194 'addit':223 'address':121 'advertis':148 'ai':63 'amount':125 'analysi':161 'analyt':62 'api':6,21,37,88,193,212 'application/json':145 'base':9,24,84,129 'base-network' 'broad':150 'call':4,19 'categori':59 'challeng':100 'classif':164 'commit':96 'confirm':101 'connect':218 'contract':237 'convers':176 'cover':154 'crypto-paid API' 'data':61,157,201 'decim':139 'detail':198,232 'doc':209,233 'document':187,224 'embed':165 'endpoint':32,52,72,103,153,240 'estim':173 'exact':115,235 'exampl':229 'exchang':168 'export':158 'feed':167 'financ':66 'function':182 'gas':172 'generat':178 'geocod':174 'given':135 'howev':179 'i.e':133 'includ':60 'infrastructur':69 'input/output':236 'insight':159 'json-response' 'key':89 'learn':65 'limit':92 'live':105 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':64 'made':112 'mani':51 'maximum':124 'metric':155 'mime':142 'minimum':95 'network':85 'no-api-key' 'offer':53 'one':49 'openapi':227 'page':213 'particular':205 'pay':2,17 'pay-per-cal':1,16 'pay-per-call' 'pay-per-request API' 'payment':42,110 'per':3,18,77 'platform':56,147 'post':108 'post-method' 'premium':5,20,36,192 'premium API access' 'price':74,166,210 'prompt':220 'protocol':43 'provid':35 'quot':171 'rate':91,169 'remain':241 'render':215 'report':156 'request':78,109 'requests/responses':230 'requir':97 'resourc':46,206 'respons':141 'return':207 'schema':228 'scheme':116 'sentiment':160 'servic':203 'settl':79 'simpli':191 'span':58 'specif':45,181 'specifi':119 'suit':151 'summar':163 'text':162 'titl':189 'token':170 'type':143 'unclear':242 'unit':130 'usdc':15,30,81,132,136 'usdc-settlement' 'util':70 'valid':175 'via':10,25,39,113 'wallet':120,219 'web3':67 'without':225 'x402':11,26,41,99 'x402 API' 'x402-payment'","prices":[{"id":"7dffd427-bc88-4676-9853-d999751c02d6","listingId":"01fc50e9-5623-435e-acbb-653698a2b37a","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/resource/45","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:42.922Z"}],"sources":[{"listingId":"01fc50e9-5623-435e-acbb-653698a2b37a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/resource/45","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:42.922Z","lastSeenAt":"2026-04-23T02:00:24.213Z"}],"details":{"listingId":"01fc50e9-5623-435e-acbb-653698a2b37a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/resource/45 \\\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":"Endpoint is live and returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/resource/45"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, and 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"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/resource/45"}],"useCases":["Accessing premium data or services without API key registration","Making one-off paid API calls settled in USDC on Base","Agent-driven workflows that need instant, keyless API access","Programmatic access to paid endpoints with crypto micropayments"],"bestFor":["Developers or agents who want keyless, pay-per-call API access","Users with USDC on Base who prefer crypto-native payment flows","Low-volume or sporadic API consumers who don't want subscriptions"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume consumers who need bulk pricing or rate-limit guarantees","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:15:30.143Z"},"updatedAt":"2026-04-23T02:00:24.213Z"}}