{"id":"dda7f89c-3acb-4dfd-96fb-c621177cc1a0","shortId":"Uvxxhr","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 resource `/api/v1/accounts/98` 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 wallet 0x1A2B…85F3 with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.\n\nThe provider advertises no API keys, no rate limits, and instant access. However, documentation pages (/docs, /pricing, /api, /README) all render only a \"Connect wallet\" prompt with no substantive content, so there is no available documentation on request/response schemas, error handling, or what data the `/api/v1/accounts/98` resource actually returns. The exact purpose of the \"accounts/98\" resource is unclear — it may be a user account lookup or a generic premium endpoint, but this cannot be confirmed from available material.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","post-method","no-api-key"],"categories":["api","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["No documentation available — all doc pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content.","The specific purpose and response format of /api/v1/accounts/98 is unknown; no output schema is provided beyond mimeType application/json.","Cannot verify what data or functionality this endpoint provides beyond the generic 'Premium API Access' label."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/98","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/98","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, but there is zero documentation on what the endpoint actually returns. No request/response schemas, no examples, and all doc pages are empty wallet-connect stubs. The purpose of '/api/v1/accounts/98' specifically is 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'/api/v1/accounts/98':47,188 '/docs':158 '/pricing':159 '/readme':161 '/request':13,28 '0.02':12,27,76,116 '000':97 '0x1a2b':128 '0x8335':102 '20':96 '2913':103 '300':132 '402':90 '6':111 '85f3':129 'Base network API' 'USDC micropayment API' 'accept':137 'access':7,22,38,154 'account':206 'accounts/98':197 'actual':190 'advertis':145 'ai':65 'analyt':64 'api':6,21,37,147 'application/json':142 'avail':177,219 'base':9,24,98,106 'broad':60 'call':4,19,118 'cannot':215 'catalog':61 'challeng':88 'confirm':217 'connect':166 'content':172 'crypto-paid API' 'data':63,186 'decim':112 'document':156,178 'endpoint':32,52,80,136,212 'error':182 'exact':124,193 'financ':68 'generic':210 'handl':183 'host':58 'howev':155 'http':89 'infrastructur':71 'instant':153 'json-api' 'key':148 'learn':67 'limit':151 'live':82 'lookup':207 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':66 'made':121 'mani':51 'materi':220 'may':202 'network':107 'no-api-key' 'offer':53 'one':49 'page':157 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,92,119 'per':3,18,77,117 'post':138 'post-method' 'premium':5,20,36,211 'premium API access' 'price':74 'prompt':168 'protocol':43 'provid':35,56,144 'purpos':194 'rate':150 'render':163 'request':78,91,139 'request/response':180 'resourc':46,189,198 'return':84,141,191 'schema':181 'scheme':125 'second':133 'sinc':108 'span':62 'specif':45 'substant':171 'timeout':134 'translat':114 'unclear':200 'unit':99 'usdc':15,30,101,109 'usdc-base' 'use':110 'user':205 'util':72 'valid':86 'via':10,25,39,122 'wallet':127,167 'web3':69 'x402':11,26,41,87 'x402 API' 'x402-payment'","prices":[{"id":"e7dd58b2-4147-4410-86cd-4251fdf12de9","listingId":"dda7f89c-3acb-4dfd-96fb-c621177cc1a0","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/98","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:23.752Z"}],"sources":[{"listingId":"dda7f89c-3acb-4dfd-96fb-c621177cc1a0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/98","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:23.752Z","lastSeenAt":"2026-04-22T16:30:57.255Z"}],"details":{"listingId":"dda7f89c-3acb-4dfd-96fb-c621177cc1a0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/98 \\\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 requesting up to 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/98"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/98"},{"claim":"Provider advertises $0.02/request pricing 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"},{"claim":"Documentation pages render only a 'Connect wallet' prompt with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium data or account information with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to various utility endpoints"],"bestFor":["Developers wanting keyless, pay-per-call API access on Base","AI agents that can settle x402 payments in USDC","Users who prefer no-commitment, no-subscription API pricing"],"notFor":["Users who need detailed API documentation or response schema guarantees","High-volume consumers who would benefit from bulk/subscription pricing","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:36.275Z"},"updatedAt":"2026-04-22T16:30:57.255Z"}}