{"id":"b3092844-1802-486f-9cf1-c7c14e501fa2","shortId":"yAXTCt","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 path `/api/v1/accounts/44` is one of many endpoints offered by the provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.\n\nThe endpoint is live and returns a valid x402 challenge (HTTP 402) requesting payment of up to 20,000 base units of USDC (0x8335…2913) on the Base network. Since USDC uses 6 decimals, this translates to $0.02 per call. Payment is made via the `exact` scheme to the specified payTo address, with a 300-second timeout. The response MIME type is `application/json`, and the input method is HTTP POST.\n\nThe provider advertises no API keys, no rate limits, and instant access. Documentation pages (/docs, /pricing, /README) appear to require a wallet connection and contain no substantive content when crawled without one. As a result, the actual response schema and detailed behavior of the `/api/v1/accounts/44` endpoint are unknown — the name \"Premium API Access\" is the only descriptor available. The broader site lists sibling endpoints for metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more, all at the same $0.02 price point.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","http-post"],"categories":["api","infrastructure"],"synonyms":["premium API","lowpaymentfee","x402 API","USDC API access","pay-per-call API","Base network API","micropayment API"],"warnings":["The specific function of /api/v1/accounts/44 is unknown — 'Premium API Access' is the only description available.","All documentation pages (/docs, /pricing, /README) returned only a 'Connect wallet' prompt with no substantive content.","No request or response schema is documented; integration requires trial-and-error or wallet-gated docs.","The provider lists many endpoints but none have detailed public documentation."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/44","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/accounts/44","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 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation of request/response formats, and the specific purpose of /api/v1/accounts/44 is entirely opaque beyond the label 'Premium API Access'. Documentation pages require wallet connection and yielded no 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'/docs':163 '/pricing':164 '/readme':165 '/request':13,28 '0.02':12,27,76,116,232 '000':97 '0x8335':102 '20':96 '2913':103 '300':133 '402':90 '6':111 'Base network API' 'USDC API access' 'access':7,22,38,160,201 'actual':185 'address':130 'advertis':151 'ai':65 'analysi':217 'analyt':64 'api':6,21,37,153,200 'appear':166 'application/json':141 'avail':206 'base':9,24,98,106 'behavior':190 'broad':60 'broader':208 'call':4,19,118 'catalog':61 'challeng':88 'classif':219 'connect':171 'contain':173 'content':176 'crawl':178 'data':63 'decim':112 'descriptor':205 'detail':189 'document':161 'embed':220 'endpoint':32,52,80,194,212 'exact':124 'exchang':223 'feed':222 'financ':68 'geocod':225 'host':58 'http':89,147 'http-post' 'infrastructur':71 'input':144 'instant':159 'json-api' 'key':154 'learn':67 'limit':157 'list':210 'live':82 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':66 'made':121 'mani':51 'method':145 'metric':214 'micropayment API' 'mime':138 'name':198 'network':107 'offer':53 'one':49,180 'page':162 'path':46 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,92,119 'payto':129 'per':3,18,77,117 'point':234 'post':148 'premium':5,20,36,199 'premium API' 'price':74,221,233 'protocol':43 'provid':35,56,150 'rate':156,224 'report':215 'request':78,91 'requir':168 'respons':137,186 'result':183 'return':84 'schema':187 'scheme':125 'second':134 'sentiment':216 'sibl':211 'sinc':108 'site':209 'span':62 'specif':45 'specifi':128 'substant':175 'summar':218 'timeout':135 'translat':114 'type':139 'unit':99 'unknown':196 'usdc':15,30,101,109 'usdc-base' 'use':110 'util':72 'valid':86 'via':10,25,39,122 'wallet':170 'web3':69 'without':179 'x402':11,26,41,87 'x402 API' 'x402-payment'","prices":[{"id":"a405dec6-e248-4d7d-a52f-dec6671e843e","listingId":"b3092844-1802-486f-9cf1-c7c14e501fa2","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/accounts/44","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:41.307Z"}],"sources":[{"listingId":"b3092844-1802-486f-9cf1-c7c14e501fa2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/44","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:41.307Z","lastSeenAt":"2026-04-22T18:31:06.334Z"}],"details":{"listingId":"b3092844-1802-486f-9cf1-c7c14e501fa2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/44 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/44"},{"claim":"USDC contract address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/44"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Provider offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or services with per-call USDC micropayments on Base","Agent-driven API consumption without API keys or subscriptions","Programmatic pay-as-you-go access to a multi-category API platform"],"bestFor":["Developers or agents wanting keyless, pay-per-request API access","Users who prefer crypto micropayments over subscription billing","Automated workflows needing low-friction API calls on Base"],"notFor":["Users who need detailed documentation or response schema guarantees before integrating","High-volume consumers who would benefit from bulk pricing or rate-limited tiers","Anyone unable to pay in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:38.257Z"},"updatedAt":"2026-04-22T18:31:06.334Z"}}