{"id":"8b4f677b-9483-482f-8396-d89354d9309d","shortId":"RAJsc7","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/9` 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 accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with an x402 exact-payment scheme. The max amount required is 20,000 base units, which at 6 decimals equals $0.02 USD per call. No API keys are needed; access is granted instantly upon payment. The provider advertises no rate limits and no minimum commitments.\n\nNote that the specific functionality of the `/api/v1/accounts/9` path is not documented beyond the label \"Premium API Access.\" The provider's landing page lists many other endpoints (metrics, reports, sentiment analysis, summarization, embeddings, price feeds, geocoding, etc.) but does not describe what the accounts endpoint returns. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional documentation. Treat this endpoint with caution — its actual response payload and input schema are unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","post-method"],"categories":["api","infrastructure"],"synonyms":["premium API","accounts endpoint","x402 API","lowpaymentfee","pay-per-call API","Base USDC API","micropayment API"],"warnings":["The specific functionality of /api/v1/accounts/9 is undocumented — 'Premium API Access' is the only label provided.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no useful content.","No input or output schema is available; callers cannot know what to send or what to expect back.","The provider lists many endpoints on the landing page but none match this specific accounts path, suggesting it may be a generic or placeholder entry."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/9","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/9","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation for the /api/v1/accounts/9 path — no input schema, no example responses, and the docs/pricing/API pages are empty beyond a wallet connect prompt. The actual functionality is 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'/request':13,28 '0.02':12,27,76,120 '000':112 '0x8335':97 '20':111 '2913':98 '6':117 'Base USDC API' 'accept':81 'access':7,22,38,129,162 'account':188 'accounts endpoint' 'actual':214 'addit':206 'advertis':137 'ai':65 'amount':108 'analysi':175 'analyt':64 'api':6,21,37,125,161,195 'base':9,24,92,113 'beyond':157 'broad':60 'call':4,19,123 'catalog':61 'caution':212 'commit':144 'connect':201 'contract':96 'data':63 'decim':118 'describ':185 'doc':192 'document':156,207 'embed':177 'endpoint':32,52,80,171,189,210 'equal':119 'etc':181 'exact':103 'exact-pay':102 'feed':179 'financ':68 'function':149 'geocod':180 'grant':131 'host':58 'infrastructur':71 'input':218 'instant':132 'json':86 'json-response' 'key':126 'label':159 'land':166 'learn':67 'limit':140 'list':168 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':66 'mani':51,169 'max':107 'metric':172 'micropayment API' 'minimum':143 'need':128 'network':93 'no-api-key' 'note':145 'offer':53 'one':49 'page':167,196 'path':46,153 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payload':216 'payment':42,87,104,134 'per':3,18,77,122 'post':82 'post-method' 'premium':5,20,36,160 'premium API' 'price':74,178,193 'prompt':203 'protocol':43 'provid':35,56,136,164 'rate':139 'render':198 'report':173 'request':78,83 'requir':109 'respons':215 'return':85,190 'schema':219 'scheme':105 'sentiment':174 'settl':89 'span':62 'specif':45,148 'summar':176 'treat':208 'unit':114 'unknown':221 'upon':133 'usd':121 'usdc':15,30,95 'usdc-base' 'use':94 'util':72 'via':10,25,39 'wallet':202 'web3':69 'x402':11,26,41,101 'x402 API' 'x402-payment'","prices":[{"id":"e94c155e-b9a3-46f2-9038-513252e6aeac","listingId":"8b4f677b-9483-482f-8396-d89354d9309d","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/9","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:17.076Z"}],"sources":[{"listingId":"8b4f677b-9483-482f-8396-d89354d9309d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/9","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:17.076Z","lastSeenAt":"2026-04-22T17:01:11.963Z"}],"details":{"listingId":"8b4f677b-9483-482f-8396-d89354d9309d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/9 \\\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 402 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/9"},{"claim":"Provider 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/accounts/9"},{"claim":"Docs, pricing, API, and README pages show only 'Connect wallet' with no further documentation","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium account data via a single paid API call","Agent-driven workflows that need keyless, pay-as-you-go API access","Testing x402 payment flows on Base network"],"bestFor":["Developers experimenting with x402 payment protocol","AI agents that need instant, keyless API access","Users who prefer per-request pricing with no subscriptions"],"notFor":["Users who need detailed API documentation before integrating","High-volume use cases where $0.02/request adds up quickly","Anyone needing a well-documented, stable production API"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:36.53Z"},"updatedAt":"2026-04-22T17:01:11.963Z"}}