{"id":"d3ab4717-6d0b-4ac6-9108-7d6a1e18ea69","shortId":"NDKe64","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 provides account balance information behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/accounts/62/balance` returns account balance data in JSON format. Payment is handled via the x402 protocol: callers include an `X-PAYMENT` header with a signed payment of up to 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals) to the payee address on Base. No API keys, rate limits, or upfront commitments are required — access is instant once payment is included.\n\nThe platform advertises a wide catalog of endpoints (metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more), all at the same $0.02 price point. Documentation pages exist but appear to be stubs requiring wallet connection, so detailed request/response schemas for this specific endpoint are not available from the crawl.","tags":[],"capabilities":["x402-payment","account-balance","usdc-base","pay-per-call","no-api-key","json-response"],"categories":["finance","data"],"synonyms":["account balance API","x402 balance check","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee"],"warnings":["No request or response schema available — the endpoint's input parameters and output format are unknown.","Documentation pages (/docs, /pricing, /README) are empty stubs requiring wallet connection.","The endpoint path includes a hardcoded account ID (62); it is unclear whether this is parameterizable or what 'account' refers to.","The broader platform lists many endpoints but none have documented schemas; actual functionality behind the paywall is unverified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/62/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/62/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format for this specific endpoint, and the docs/pricing/README pages are all empty stubs behind a wallet-connect gate. The endpoint path suggests a hardcoded account ID (62), making its general utility 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'0.02':11,24,67,117,174 '000':111 '20':110 '6':121 'Base network API' 'USDC pay-per-call' 'access':139 'account':2,15,32,83 'account balance API' 'account-balance' 'address':126 'advertis':148 'ai/ml':57 'analysi':157 'analyt':56 'api':53,130 'appear':181 'avail':198 'balanc':3,16,33,84 'base':8,21,76,112,128 'behind':35 'broader':44 'call':52 'caller':96 'catalog':151 'check':1,14 'classif':160 'commit':136 'connect':187 'crawl':201 'data':55,60,85 'decim':122 'detail':189 'document':177 'dozen':47 'embed':161 'endpoint':28,80,153,195 'exchang':164 'exist':179 'feed':163 'finance/web3':59 'format':88 'geocod':166 'handl':91 'header':102 'i.e':116 'includ':97,145 'infer':58 'inform':34 'infrastructur':62 'instant':141 'json':87 'json-response' 'key':131 'limit':133 'lowpaymentfee' 'lowpaymentfee.com':30 'metric':154 'micropay':6,19 'micropayment API' 'network':9,22,77 'no-api-key' 'offer':46 'page':178 'part':41 'pay':50 'pay-per-cal':49 'pay-per-call' 'paye':125 'payment':89,101,106,143 'paywal':38 'per':12,25,51,68 'platform':45,147 'point':176 'price':65,162,175 'protocol':95 'provid':31 'rate':132,165 'report':155 'request':13,26,69 'request/response':190 'requir':138,185 'return':82 'schema':191 'sentiment':156 'settl':71 'sign':105 'sinc':118 'span':54 'specif':79,194 'stub':184 'summar':159 'text':158 'unit':113 'upfront':135 'usdc':73,115,119 'usdc-base' 'use':120 'util':63 'valid':167 'via':4,17,92 'wallet':186 'wide':150 'x':100 'x-payment':99 'x402':5,18,37,94 'x402 balance check' 'x402-payment'","prices":[{"id":"e96b3764-5df3-4568-a4f9-d12523e3b7a2","listingId":"d3ab4717-6d0b-4ac6-9108-7d6a1e18ea69","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/62/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":"2026-04-18T18:39:56.477Z"}],"sources":[{"listingId":"d3ab4717-6d0b-4ac6-9108-7d6a1e18ea69","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/62/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:56.477Z","lastSeenAt":"2026-04-29T05:33:53.744Z"}],"details":{"listingId":"d3ab4717-6d0b-4ac6-9108-7d6a1e18ea69","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/62/balance \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring up to 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/62/balance"},{"claim":"Platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/62/balance"},{"claim":"Platform offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Querying account balance data programmatically with per-call USDC micropayments","Integrating balance lookups into agent workflows without API key management","Demonstrating x402 protocol payment flows on Base network"],"bestFor":["Developers experimenting with x402 micropayment protocols","Agents needing keyless, pay-per-call balance data","Projects on Base network wanting USDC-settled API access"],"notFor":["Users needing free or high-volume bulk balance queries","Anyone requiring detailed API documentation or guaranteed SLAs","Use cases needing non-USDC or non-Base payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:37.563Z"},"updatedAt":"2026-04-29T05:33:53.744Z"}}