{"id":"eb90ab8c-f867-4d04-9ac7-fd3394d329ac","shortId":"fTUTr6","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 account ID 183. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all settled via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/accounts/183/balance` accepts POST requests and is gated by an x402 payment challenge. The price per call is $0.02 (20,000 base units of USDC, which has 6 decimals). Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The response MIME type is `application/json`. No API keys are required; access is granted immediately upon payment. The platform advertises no rate limits.\n\nDocumentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the balance response contains. The endpoint is confirmed live (returns a valid 402 challenge), but the actual functionality and response shape must be inferred from the endpoint path alone.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","account-balance","pay-per-request","no-api-key","json-response"],"categories":["finance"],"synonyms":["account balance API","x402 balance check","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee","crypto payment API"],"warnings":["No documentation available — all doc pages render only 'Connect wallet' with no content","No OpenAPI or request/response schema provided; response shape is unknown","The specific meaning of 'account 183 balance' is unclear — it may be a demo or placeholder endpoint","Platform lists many API categories but none have visible documentation or usage examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/183/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/183/balance","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 402 challenge, confirming pricing and network details. However, there is no documentation, no OpenAPI schema, no request/response examples, and the docs pages are empty stubs. The actual purpose ('account balance') is inferred solely from the URL path. This is effectively a stub 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'0.02':11,24,92 '000':94 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':108 '183':38 '20':93 '402':185 '6':101 'Base network API' 'USDC pay-per-call' 'accept':76 'access':122 'account':2,15,32,36 'account balance API' 'account-balance' 'across':52 'actual':189 'address':107 'advertis':130 'ai/ml':55 'alon':201 'analyt':54 'api':51,118,143 'application/json':116 'balanc':3,16,33,174 'base':8,21,68,95,110 'base-network' 'broader':44 'call':90 'categori':59 'challeng':86,186 'check':1,14 'confirm':180 'connect':152 'contain':176 'content':158 'crypto payment API' 'data':53 'decim':102 'descript':170 'detail':169 'doc':142 'document':134 'endpoint':28,74,178,199 'exampl':166 'extrem':139 'finance/web3':56 'function':190 'gate':81 'grant':124 'id':37 'immedi':125 'infer':196 'inform':34 'infrastructur':58 'json-response' 'key':119 'limit':133 'live':181 'lowpaymentfee' 'lowpaymentfee.com':30 'made':105 'micropay':6,19 'micropayment API' 'mime':113 'must':194 'network':9,22,69 'no-api-key' 'offer':46 'openapi':162 'page':147 'part':41 'path':200 'pay':48 'pay-per-request':47 'payment':85,103,127 'per':12,25,49,89 'platform':45,129 'post':77 'price':88,144 'prompt':154 'protocol':65 'rate':132 'readm':146 'render':149 'request':13,26,50,78 'request/response':165 'requir':121 'respons':112,175,192 'return':31,182 'schema':163 'settl':61 'shape':193 'site':137 'spars':140 'specif':73 'type':114 'unit':96 'upon':126 'usdc':71,98 'usdc-settlement' 'use':70 'valid':184 'via':4,17,62 'wallet':153 'x402':5,18,64,84 'x402 balance check' 'x402-payment'","prices":[{"id":"7ba379e6-bc62-4106-815b-0c89b5383d15","listingId":"eb90ab8c-f867-4d04-9ac7-fd3394d329ac","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/183/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":"2026-04-18T18:41:35.558Z"}],"sources":[{"listingId":"eb90ab8c-f867-4d04-9ac7-fd3394d329ac","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/183/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:35.558Z","lastSeenAt":"2026-04-30T11:03:55.754Z"}],"details":{"listingId":"eb90ab8c-f867-4d04-9ac7-fd3394d329ac","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/183/balance \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/183/balance"},{"claim":"Platform pricing is $0.02 per request 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/183/balance"},{"claim":"Docs, API, pricing, and README pages all show only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying account balance data on-demand without subscription or API key","Integrating pay-per-call balance checks into automated agent workflows","Demonstrating x402 protocol micropayment flows on Base"],"bestFor":["Agents or bots that need one-off balance lookups without credential management","Developers experimenting with x402 micropayment protocol","Use cases requiring no-commitment, pay-as-you-go API access"],"notFor":["High-volume balance polling where per-request fees would accumulate quickly","Users who need detailed documentation or guaranteed SLAs before integration","Applications requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.746Z"},"updatedAt":"2026-04-30T11:03:55.754Z"}}