{"id":"03f80077-b616-4376-bf1c-075a998caf27","shortId":"5e3fLS","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/106` is one of many endpoints offered by the platform, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.\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) to address `0x1A2B...85F3`, with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The challenge specifies a 300-second timeout and returns `application/json` responses.\n\nThe broader platform advertises endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation. However, the specific functionality behind `/api/v1/accounts/106` (labeled \"Premium API Access\") is not documented in detail — it may be an account-related data endpoint, but this is not confirmed. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","post-method"],"categories":["api-gateway","infrastructure"],"synonyms":["low payment fee API","x402 API","pay-per-call API","USDC API access","Base network API","micropayment API"],"warnings":["The specific functionality of /api/v1/accounts/106 ('Premium API Access') is not documented anywhere in the crawled material.","All documentation pages (/docs, /pricing, /api, /README) returned only a 'Connect wallet' prompt with no substantive content.","No OpenAPI spec, request schema, or response schema is available — integration requires trial and error.","The platform lists many diverse endpoints (AI, finance, utilities) but none have detailed docs; actual capabilities are unverified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/106","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/106","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation of request/response formats, and the specific purpose of /api/v1/accounts/106 is unclear. All doc pages returned only 'Connect wallet' with no 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'/api/v1/accounts/106':47,186 '/docs':212 '/pricing':213 '/readme':215 '/request':13,28 '0.02':12,27,76,134 '000':130 '0x1a2b':122 '0x8335':116 '20':129 '2913':117 '300':144 '6':138 '85f3':123 'Base network API' 'USDC API access' 'accept':104 'access':7,22,38,190 'account':201 'account-rel':200 'address':121 'advertis':154 'ai':63 'amount':127 'analysi':163 'analyt':62 'api':6,21,37,88,189 'application/json':149 'base':9,24,84,119,131 'behind':185 'broader':152 'call':4,19 'categori':59 'chain':112 'challeng':97,141 'classif':166 'commit':93 'confirm':98,209 'connect':220 'content':226 'contract':115 'convers':178 'data':61,159,203 'decim':139 'detail':195 'document':193,210 'embed':167 'endpoint':32,52,72,100,155,204 'estim':175 'exchang':170 'export':160 'feed':169 'financ':66 'function':184 'gas':174 'generat':180 'geocod':176 'given':135 'howev':181 'i.e':133 'includ':60 'infrastructur':69 'insight':161 'json-response' 'key':89 'label':187 'learn':65 'limit':91 'live':102 'low payment fee API' 'lowpaymentfee.com':34 'machin':64 'mani':51 'maximum':126 'may':197 'metric':157 'micropayment API' 'network':85 'no-api-key' 'offer':53 'on-chain':110 'one':49 'page':211 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payabl':79 'payment':42,107 'per':3,18,77 'platform':56,153 'post':105 'post-method' 'premium':5,20,36,188 'price':74,168 'prompt':222 'protocol':43 'provid':35 'quot':173 'rate':90,171 'relat':202 'report':158 'request':78,106 'requir':94 'resourc':46 'respons':150 'return':148,217 'second':145 'sentiment':162 'settl':109 'span':58 'specif':45,183 'specifi':142 'substant':225 'summar':165 'text':164 'timeout':146 'token':172 'unit':132 'usdc':15,30,81,114,136 'usdc-base' 'use':113 'util':70 'valid':177 'via':10,25,39 'wallet':221 'web3':67 'x402':11,26,41,96 'x402 API' 'x402-payment'","prices":[{"id":"56151dfe-d39a-4a6d-9d62-c13d61321750","listingId":"03f80077-b616-4376-bf1c-075a998caf27","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/106","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:38.280Z"}],"sources":[{"listingId":"03f80077-b616-4376-bf1c-075a998caf27","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/106","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:38.280Z","lastSeenAt":"2026-04-24T09:03:19.063Z"}],"details":{"listingId":"03f80077-b616-4376-bf1c-075a998caf27","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/106 \\\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":"Endpoint returns 402 with x402 challenge accepting USDC on Base network, maxAmountRequired 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/accounts/106"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, 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/106"},{"claim":"Platform offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data without needing API keys or subscriptions","Agent-driven workflows that need on-demand, pay-per-call endpoints","Programmatic access to account-level data via crypto micropayments"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents with x402-compatible payment capabilities","Users who prefer on-chain USDC payments over traditional billing"],"notFor":["Users who need detailed documentation or OpenAPI schemas 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":"2026-02-17T23:14:35.548Z"},"updatedAt":"2026-04-24T09:03:19.063Z"}}