{"id":"9a9cd0cb-3ee0-425d-8294-d024143638ce","shortId":"kjgjtp","kind":"x402","title":"x402-gated premium API access on Base network, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base network, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The site hosts a collection of pay-per-request APIs spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, settled in USDC on Base.\n\nThe specific endpoint `/api/v1/accounts/68` is labeled \"Premium API Access\" and requires a payment of up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call. Payment is made via the x402 exact scheme with no API keys or rate limits required — callers simply attach an X-PAYMENT header with a valid payment proof. The endpoint accepts POST requests and returns application/json responses.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/accounts/68` endpoint actually returns. The site's landing page lists many endpoints but does not clarify what data or functionality this particular accounts endpoint provides.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-gateway","crypto"],"synonyms":["low payment fee","x402 api","pay per request api","usdc api access","base network api","micropayment api","402 payment required"],"warnings":["No documentation available — docs/pricing/README pages only show 'Connect wallet'","No OpenAPI or request/response schema provided","Purpose of /api/v1/accounts/68 is unclear — 'Premium API Access' is not descriptive","Cannot verify what data or functionality is returned after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/68","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/68","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, no OpenAPI schema, no request/response examples, and no explanation of what the /api/v1/accounts/68 endpoint actually does. Effectively a stub 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'0.02':11,26,92,122 '000':117 '20':116 '402 payment required' '6':127 'accept':162 'access':6,21,38,108 'account':228 'actual':208 'addit':189 'ai':62 'analysi':66 'analyt':61 'api':5,20,37,58,107,141,175 'application/json':167 'attach':149 'base':8,23,46,99,118 'base network api' 'base-network' 'call':130 'caller':147 'clarifi':221 'classif':68 'collect':52 'connect':184 'convers':85 'data':60,223 'decim':128 'descript':202 'detail':191 'doc':174 'document':169 'embed':69 'endpoint':32,88,102,161,207,217,229 'estim':79 'exact':137 'exampl':199 'exchang':74 'extrem':171 'feed':73 'financ':70 'function':225 'gas':78 'gate':3,18 'generat':86 'geocod':83 'header':154 'host':50 'infrastructur':81 'json-response' 'key':142 'label':105 'land':213 'learn':64 'limit':145 'list':215 'low payment fee' 'lowpaymentfee.com':34 'machin':63 'made':133 'mani':216 'micropayment api' 'network':9,24,47 'no-api-key' 'openapi':195 'page':179,214 'particular':227 'pay':10,25,55 'pay per request api' 'pay-per-request':54 'payment':42,112,131,153,158 'per':12,27,56,93,129 'post':163 'post-method' 'premium':4,19,36,106 'price':72,90,176 'prompt':186 'proof':159 'protocol':43 'provid':35,230 'quot':77 'rate':75,144 'readm':178 'render':181 'request':13,28,57,94,164 'request/response':198 'requir':110,146 'respons':168 'return':166,209 'schema':196 'scheme':138 'sentiment':65 'settl':95 'simpli':148 'sinc':124 'site':49,211 'span':59 'spars':172 'specif':101 'summar':67 'technic':190 'token':76 'unit':119 'usd':123 'usdc':15,30,97,121,125 'usdc api access' 'usdc-settlement' 'use':126 'util':82 'valid':84,157 'via':39,134 'wallet':185 'web3':71 'x':152 'x-payment':151 'x402':2,17,41,136 'x402 api' 'x402-gated':1,16 'x402-payment'","prices":[{"id":"f9102d22-f6a0-4c70-9ca3-27e3a435cb33","listingId":"9a9cd0cb-3ee0-425d-8294-d024143638ce","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/68","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:00.112Z"}],"sources":[{"listingId":"9a9cd0cb-3ee0-425d-8294-d024143638ce","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/68","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:00.112Z","lastSeenAt":"2026-04-24T02:02:03.803Z"}],"details":{"listingId":"9a9cd0cb-3ee0-425d-8294-d024143638ce","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/68 \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring up to 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/68"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/68"}],"useCases":["Accessing premium data or account information with per-request USDC micropayments","Integrating pay-as-you-go API calls into agent workflows without managing API keys","Settling API costs on-chain via Base network USDC"],"bestFor":["Developers wanting keyless, pay-per-use API access","Agents that can settle x402 payments on Base","Users who prefer on-chain micropayments over subscriptions"],"notFor":["Users needing detailed API documentation or schemas before integrating","High-volume use cases where per-request payment overhead is impractical","Users without access to USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:37.372Z"},"updatedAt":"2026-04-24T02:02:03.803Z"}}