{"id":"49dc1551-64d4-4c84-b0c8-28d439c8b2bf","shortId":"yuGHKd","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/78` appears to be 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 paid in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled on-chain using USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The provider advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request. The payment timeout is 300 seconds.\n\nHowever, the specific functionality behind `/api/v1/accounts/78` is not documented on the provider's landing page or docs (the docs pages returned only a \"Connect wallet\" prompt with no further content). The endpoint path suggests an account-related resource, but without schema documentation or example responses, the exact data returned is unknown. The broader site lists endpoints for metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and generation — but this particular path does not appear in those listings.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","http-post","json-response"],"categories":["api","infrastructure"],"synonyms":["premium API","x402 endpoint","pay-per-call API","USDC API access","Base network API","lowpaymentfee","micropayment API"],"warnings":["The specific endpoint /api/v1/accounts/78 is not listed among the provider's documented APIs — its purpose is unclear.","All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no actual content.","No request or response schema is available; integration requires trial-and-error.","No OpenAPI spec or AI plugin manifest found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/78","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/78","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 confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation for this specific path, no request/response schema, and the docs/pricing/README pages all returned only 'Connect wallet' with no usable content. The purpose of /api/v1/accounts/78 is 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'/request':13,28 '0.02':12,27,78,124 '000':119 '0x8335':109 '20':118 '2913':110 '300':155 '6':127 'Base network API' 'USDC API access' 'accept':97 'access':7,22,38,140 'account':193 'account-rel':192 'advertis':131 'ai':67 'amount':116 'analysi':218 'analyt':66 'api':6,21,37,133 'appear':48,238 'attach':143 'base':9,24,86,112,120 'behind':161 'broad':62 'broader':210 'call':4,19 'catalog':63 'chain':105 'challeng':90 'classif':221 'confirm':91 'connect':180 'content':186 'contract':108 'convers':229 'data':65,205 'decim':128 'doc':173,175 'document':165,199 'embed':222 'endpoint':32,54,93,188,213 'equal':123 'exact':204 'exampl':201 'exchang':225 'feed':224 'financ':70 'function':160 'generat':231 'geocod':227 'header':147 'host':60 'howev':157 'http-post' 'infrastructur':73 'instant':139 'json-response' 'key':134 'land':170 'learn':69 'limit':137 'list':212,241 'live':95 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':68 'mani':53 'maximum':115 'metric':215 'micropayment API' 'network':87 'offer':55 'on-chain':103 'one':51 'page':171,176 'paid':81 'particular':234 'path':46,189,235 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,100,146,152 'per':3,18,79 'post':98 'premium':5,20,36 'premium API' 'price':76,223 'prompt':182 'protocol':43 'provid':35,58,130,168 'rate':136,226 'relat':194 'report':216 'request':80,99,150 'resourc':195 'respons':202 'return':177,206 'schema':198 'second':156 'sentiment':217 'settl':102 'simpli':142 'site':211 'span':64 'specif':45,159 'suggest':190 'summar':220 'text':219 'timeout':153 'unit':121 'unknown':208 'usdc':15,30,83,107,125 'usdc-base' 'use':106,126 'util':74 'valid':228 'via':10,25,39 'wallet':181 'web3':71 'without':197 'x402':11,26,41,89,145 'x402 endpoint' 'x402-payment'","prices":[{"id":"79237442-e333-4329-92bd-421300a53945","listingId":"49dc1551-64d4-4c84-b0c8-28d439c8b2bf","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/78","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:08.465Z"}],"sources":[{"listingId":"49dc1551-64d4-4c84-b0c8-28d439c8b2bf","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/78","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:08.465Z","lastSeenAt":"2026-04-22T16:30:56.086Z"}],"details":{"listingId":"49dc1551-64d4-4c84-b0c8-28d439c8b2bf","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/78 \\\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 x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base, equaling $0.02 per request.","source_url":"https://lowpaymentfee.com/api/v1/accounts/78"},{"claim":"The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/accounts/78"},{"claim":"The provider lists endpoints for analytics, AI/ML, finance/Web3, and infrastructure utilities.","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium account data with per-request USDC micropayments","Integrating x402-compatible payment flows into agent workflows","Programmatic access to API resources without API key management"],"bestFor":["Developers or agents wanting keyless, pay-per-use API access","x402-compatible wallets and agent frameworks on Base","Low-friction micropayment API consumption"],"notFor":["Users needing detailed API documentation or schemas before integrating","High-volume use cases where per-request payment overhead matters","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:36.993Z"},"updatedAt":"2026-04-22T16:30:56.086Z"}}