{"id":"3b14635e-1477-4c23-8a7d-c681e5e0eab7","shortId":"YH6sxA","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/165` 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 requests. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment scheme is \"exact,\" meaning a fixed per-call charge. There are no API keys required, no rate limits advertised, and access is described as instant once payment is included in the X-PAYMENT header.\n\nThe platform's documentation pages (/docs, /pricing, /README) all resolve but contain only a \"Connect wallet\" prompt with no substantive technical documentation. As a result, the actual functionality behind this specific `/api/v1/accounts/165` path is unclear — the description simply says \"Premium API Access\" without detailing what data or service is returned. The broader site lists endpoints for metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more, but none of these correspond to the `/accounts/165` path. Buyers should be aware that the exact response payload and use case for this particular endpoint are not documented.","tags":[],"capabilities":["x402-payment","per-call-pricing","usdc-settlement","base-network","http-post","json-response"],"categories":["api","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The exact functionality and response format of /api/v1/accounts/165 is not documented anywhere in the crawled material.","All documentation pages (/docs, /pricing, /README) contain only a 'Connect wallet' prompt with no technical content.","This endpoint path does not match any of the advertised API categories on the homepage — its purpose is unclear.","No OpenAPI spec or output schema beyond basic HTTP method info is provided."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/165","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/165","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but the actual functionality of /api/v1/accounts/165 is entirely undocumented. No OpenAPI schema, no response examples, and all documentation pages are empty beyond a wallet-connect prompt. The purpose of this specific endpoint cannot be determined from available 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'/api/v1/accounts/165':47,190 '/docs':164 '/pricing':165 '/readme':166 '/request':13,28 '0.02':12,27,78,116 '000':111 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':104 '20':110 '6':119 'Base network API' 'USDC micropayment endpoint' 'access':7,22,38,144,200 'actual':185 'advertis':60,142 'ai':67 'amount':108 'analysi':218 'analyt':66 'api':6,21,37,136,199 'appear':48 'awar':242 'base':9,24,99,112 'base-network' 'behind':187 'broad':62 'broader':210 'buyer':239 'call':4,19,131 'case':250 'catalog':63 'challeng':90 'charg':132 'classif':221 'connect':173 'contain':170 'contract':103 'correspond':234 'crypto-paid API' 'data':65,204 'decim':120 'describ':146 'descript':195 'detail':202 'document':162,180,257 'embed':222 'endpoint':32,54,82,213,254 'equal':115 'exact':125,245 'exchang':225 'feed':224 'financ':70 'fix':128 'function':186 'geocod':227 'header':158 'http-post' 'includ':152 'infrastructur':73 'instant':148 'json-response' 'key':137 'learn':69 'limit':141 'list':212 'live':84 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':68 'mani':53 'maximum':107 'mean':126 'metric':215 'network':100 'none':231 'offer':55 'one':51 'page':163 'particular':253 'path':46,191,238 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'payload':247 'payment':42,94,122,150,157 'per':3,18,79,130 'per-cal':129 'per-call-pricing' 'platform':58,160 'post':92 'premium':5,20,36,198 'premium API access' 'price':76,223 'prompt':175 'protocol':43 'provid':35 'rate':140,226 'report':216 'request':80,93 'requir':138 'resolv':168 'respons':246 'result':183 'return':86,208 'say':197 'scheme':123 'sentiment':217 'servic':206 'settl':96 'simpli':196 'site':211 'span':64 'specif':45,189 'substant':178 'summar':220 'technic':179 'text':219 'unclear':193 'unit':113 'usdc':15,30,102,117 'usdc-settlement' 'use':101,118,249 'util':74 'valid':88 'via':10,25,39 'wallet':174 'web3':71 'without':201 'x':156 'x-payment':155 'x402':11,26,41,89 'x402 API' 'x402-payment'","prices":[{"id":"489646e2-6e08-475f-b8bd-625968452859","listingId":"3b14635e-1477-4c23-8a7d-c681e5e0eab7","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/165","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:19.927Z"}],"sources":[{"listingId":"3b14635e-1477-4c23-8a7d-c681e5e0eab7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/165","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:19.927Z","lastSeenAt":"2026-04-22T16:31:00.735Z"}],"details":{"listingId":"3b14635e-1477-4c23-8a7d-c681e5e0eab7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/165 \\\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 on Base network using USDC","source_url":"https://lowpaymentfee.com/api/v1/accounts/165"},{"claim":"The 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 on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/165"},{"claim":"Documentation pages resolve but contain only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing a pay-per-call API endpoint without needing API keys or subscriptions","Programmatic agent-driven API consumption with on-chain USDC micropayments","Testing x402 payment protocol integrations on Base network"],"bestFor":["Developers experimenting with x402 payment-gated APIs","AI agents that need keyless, pay-as-you-go API access","Users who prefer crypto micropayments over traditional API billing"],"notFor":["Users who need detailed API documentation before purchasing","High-volume use cases where per-call pricing may add up without bulk discounts","Anyone without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:33.502Z"},"updatedAt":"2026-04-22T16:31:00.735Z"}}