{"id":"23389330-2f1b-4ee7-97c7-a6ce6eb84d0a","shortId":"N9MMUH","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/15` appears to be one of many endpoints offered by the platform, which advertises 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 on POST. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). There are no API keys required, no rate limits advertised, and access is described as instant once payment is attached. The x402 challenge specifies a 300-second timeout window.\n\nHowever, the specific functionality behind `/api/v1/accounts/15` is not documented beyond the generic label \"Premium API Access.\" The platform's docs, pricing, and API pages all render only a wallet-connect prompt with no additional technical documentation, OpenAPI schema, or example request/response payloads. Without knowing what this particular accounts endpoint returns, callers should treat it as an opaque JSON endpoint and experiment cautiously.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","http-post"],"categories":["api","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium API","pay-per-call API","USDC API access","Base network API","micropayment API"],"warnings":["The specific functionality of /api/v1/accounts/15 is undocumented — 'Premium API Access' is a generic label","All documentation pages (docs, pricing, API, README) render only a wallet-connect prompt with no technical content","No OpenAPI schema, request/response examples, or input parameter documentation available","The accounts endpoint may return user-specific or placeholder data; purpose is unclear"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/15","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/15","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, but there is no documentation, no OpenAPI schema, no example requests or responses, and the specific purpose of /api/v1/accounts/15 is unclear. The platform's doc pages render only wallet-connect prompts with no usable 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'/request':13,28 '0.02':12,27,78,116 '000':111 '0x8335':103 '20':110 '2913':104 '300':146 '6':119 'Base network API' 'USDC API access' 'access':7,22,38,132,165 'account':198 'addit':184 'advertis':60,130 'ai':67 'amount':108 'analyt':66 'api':6,21,37,124,164,172 'appear':48 'attach':140 'base':9,24,98,112 'base-network' 'behind':154 'beyond':159 'broad':62 'call':4,19 'caller':201 'catalog':63 'cautious':212 'challeng':90,143 'connect':180 'contract':102 'data':65 'decim':120 'describ':134 'doc':169 'document':158,186 'endpoint':32,54,82,199,209 'equal':115 'exampl':190 'experi':211 'financ':70 'function':153 'generic':161 'howev':150 'http-post' 'infrastructur':73 'instant':136 'json':208 'json-response' 'key':125 'know':194 'label':162 'learn':69 'limit':129 'live':84 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':68 'mani':53 'maximum':107 'micropayment API' 'network':99 'no-api-key' 'offer':55 'one':51 'opaqu':207 'openapi':187 'page':173 'particular':197 'path':46 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payload':192 'payment':42,93,138 'per':3,18,79 'platform':58,167 'post':92 'premium':5,20,36,163 'price':76,170 'prompt':181 'protocol':43 'provid':35 'rate':128 'render':175 'request':80 'request/response':191 'requir':126 'return':86,200 'schema':188 'second':147 'settl':95 'span':64 'specif':45,152 'specifi':144 'technic':185 'timeout':148 'treat':203 'unit':113 'usdc':15,30,101,117 'usdc-settlement' 'use':100,118 'util':74 'valid':88 'via':10,25,39 'wallet':179 'wallet-connect':178 'web3':71 'window':149 'without':193 'x402':11,26,41,89,142 'x402 premium API' 'x402-payment'","prices":[{"id":"68cbba74-17c1-4e6a-abcf-423fe909cc0d","listingId":"23389330-2f1b-4ee7-97c7-a6ce6eb84d0a","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/15","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:16.607Z"}],"sources":[{"listingId":"23389330-2f1b-4ee7-97c7-a6ce6eb84d0a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/15","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:16.607Z","lastSeenAt":"2026-04-22T18:31:04.897Z"}],"details":{"listingId":"23389330-2f1b-4ee7-97c7-a6ce6eb84d0a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/15 \\\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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/15"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/15"}],"useCases":["Accessing premium data or account information with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Programmatic access to paid endpoints settled on Base L2"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can attach x402 payment headers autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed documentation or guaranteed SLAs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:39.327Z"},"updatedAt":"2026-04-22T18:31:04.897Z"}}