{"id":"23050107-23ab-4177-b7fd-9adae6c62e3c","shortId":"hQ7kgk","kind":"x402","title":"Check account balance via x402 micropayment on Base network for $0.02 per request.","tagline":"Check account balance via x402 micropayment on Base network for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns account balance information for a specific account (ID 175) via an x402-gated API call. Payment is settled in USDC on the Base network using the x402 \"exact\" scheme. The cost per request is $0.02 (20,000 base units of USDC with 6 decimals).\n\nThe provider, lowpaymentfee.com, operates a broader platform offering multiple API categories including data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nThis specific endpoint (`/api/v1/accounts/175/balance`) is labeled \"Premium API Access\" and accepts POST requests. The response MIME type is `application/json`. Documentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no request/response examples, and no description of what fields the balance response contains. The endpoint is confirmed live via a valid 402 challenge.","tags":[],"capabilities":["x402-payment","usdc-base","account-balance","micropayment","json-response","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["account balance API","x402 balance check","USDC micropayment API","Base network API","pay-per-call balance","lowpaymentfee","crypto payment API"],"warnings":["No OpenAPI or request/response schema available — input and output formats are unknown","All documentation pages (docs, API, pricing, README) are effectively empty","The specific meaning of 'account 175 balance' is undocumented — unclear what data is returned","No examples of successful responses exist in the crawled material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/175/balance","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/175/balance","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 with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages beyond the landing page are empty (just 'Connect wallet'). The purpose of this specific endpoint (account 175 balance) is vague and 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'0.02':11,24,67,121 '000':69 '175':40 '20':68 '402':208 '6':75 'Base network API' 'USDC micropayment API' 'accept':146 'access':144 'account':2,15,32,38 'account balance API' 'account-balance' 'addit':179 'ai':91 'analysi':95 'analyt':90 'api':46,86,126,143,165 'application/json':154 'balanc':3,16,33,197 'base':8,21,55,70 'beyond':156 'broader':82 'call':47 'categori':87 'challeng':209 'check':1,14 'classif':97 'commit':134 'confirm':203 'connect':174 'contain':199 'convers':114 'cost':63 'crypto payment API' 'data':89 'decim':76 'descript':192 'detail':181 'doc':164 'document':155 'embed':98 'endpoint':28,117,138,201 'estim':108 'exact':60 'exampl':189 'exchang':103 'extrem':161 'feed':102 'field':195 'financ':99 'gas':107 'gate':45 'generat':115 'geocod':112 'id':39 'includ':88 'inform':34 'infrastructur':110 'json-response' 'key':127 'label':141 'land':158 'learn':93 'limit':130 'live':204 'lowpaymentfee' 'lowpaymentfee.com':30,79 'machin':92 'micropay':6,19 'micropayment' 'mime':151 'minimum':133 'multipl':85 'network':9,22,56 'no-api-key' 'offer':84 'openapi':185 'oper':80 'page':159,169 'pay-per-call balance' 'payment':48 'per':12,25,64,122 'platform':83 'post':147 'premium':142 'price':101,119,166 'prompt':176 'provid':78 'quot':106 'rate':104,129 'readm':168 'render':171 'request':13,26,65,123,148 'request/response':188 'requir':135 'respons':150,198 'return':31 'schema':186 'scheme':61 'sentiment':94 'settl':50 'spars':162 'specif':37,137 'summar':96 'technic':180 'token':105 'type':152 'unit':71 'usdc':52,73 'usdc-base' 'use':57 'util':111 'valid':113,207 'via':4,17,41,205 'wallet':175 'web3':100 'x402':5,18,44,59 'x402 balance check' 'x402-gated':43 'x402-payment'","prices":[{"id":"af7ec779-5056-423c-9a49-3a7d77cbfead","listingId":"23050107-23ab-4177-b7fd-9adae6c62e3c","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/175/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:33.140Z"}],"sources":[{"listingId":"23050107-23ab-4177-b7fd-9adae6c62e3c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/175/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:33.140Z","lastSeenAt":"2026-04-27T18:07:21.397Z"}],"details":{"listingId":"23050107-23ab-4177-b7fd-9adae6c62e3c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/175/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/accounts/175/balance"},{"claim":"Price is $0.02 per request (maxAmountRequired 20000 base units USDC, 6 decimals)","source_url":"https://lowpaymentfee.com/api/v1/accounts/175/balance"},{"claim":"Payment settled in USDC on Base network to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/accounts/175/balance"},{"claim":"Platform advertises $0.02/request, no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Querying account balance data with per-request USDC micropayments","Integrating pay-per-call balance lookups into agent workflows","Accessing financial account information without API key registration"],"bestFor":["Agents that can settle x402 payments in USDC on Base","Developers wanting zero-signup, pay-per-use account balance queries","Micropayment-native workflows requiring no subscription or API key"],"notFor":["Users needing detailed API documentation or response schema before integrating","High-volume batch queries where per-request pricing may add up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.878Z"},"updatedAt":"2026-04-27T18:07:21.397Z"}}