{"id":"b98c7888-f3d6-4780-ba13-a69e50f1877a","shortId":"g82VZn","kind":"x402","title":"x402-gated account balance endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated account balance endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides an account balance lookup via the x402 payment protocol. The specific resource `/api/v1/accounts/164/balance` is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints on the platform are priced at $0.02 per request, settled in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the x402 \"exact\" scheme, requiring up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. No API keys or rate limits are advertised; access is granted purely through the x402 payment header. The response MIME type is application/json.\n\nDocumentation is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the balance endpoint actually returns or what input parameters it expects. The endpoint path suggests it retrieves the balance of account ID 164, but the semantics (financial balance, credit balance, token balance, etc.) are not documented.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","account-balance","pay-per-request","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["account balance API","x402 API","USDC micropayment API","pay-per-call API","Base network API","lowpaymentfee","crypto payment API"],"warnings":["No documentation available — docs, pricing, and API pages only show 'Connect wallet'","No OpenAPI or request/response schema provided","Unclear what 'account 164 balance' represents — no semantic description","No examples of successful responses available","Platform lists many endpoints but none appear individually documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/164/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/164/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 (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the balance endpoint returns. The docs pages are empty beyond a wallet connect prompt. This is effectively a stub 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'0.02':10,24,86,131 '000':120 '0x8335':125 '164':216 '20':119 '2913':126 '6':135 'Base network API' 'USDC micropayment API' 'accept':105 'access':145 'account':4,18,35,214 'account balance API' 'account-balance' 'actual':197 'advertis':144 'ai/ml':71 'analyt':70 'api':67,138,168 'application/json':159 'balanc':5,19,36,195,212,221,223,225 'base':8,22,94,121,128 'base-network' 'broad':60 'call':66 'catalog':61 'challeng':98 'confirm':99 'connect':174 'content':180 'credit':222 'crypto payment API' 'data':69,74 'decim':136 'descript':191 'doc':165 'document':160,229 'endpoint':6,20,30,51,79,101,196,206 'equal':130 'etc':226 'exact':114 'exampl':188 'expect':204 'extrem':162 'finance/web3':73 'financi':220 'gate':3,17 'given':132 'grant':147 'header':153 'host':58 'id':215 'infer':72 'input':201 'key':139 'limit':142 'live':103 'lookup':37 'lowpaymentfee' 'lowpaymentfee.com':32,55 'made':110 'mani':50 'mime':156 'network':95 'no-api-key' 'offer':52 'one':48 'openapi':184 'page':169 'paramet':202 'path':207 'pay':9,23,64 'pay-per-cal':63 'pay-per-call API' 'pay-per-request' 'payment':41,108,152 'per':11,25,65,87 'platform':56,82 'post':106 'price':84,166 'prompt':176 'protocol':42 'provid':33 'pure':148 'rate':141 'render':171 'request':12,26,88,107 'request/response':187 'requir':116 'resourc':45 'respons':155 'retriev':210 'return':198 'schema':185 'scheme':115 'semant':219 'servic':77 'settl':89 'span':68 'spars':163 'specif':44 'suggest':208 'token':224 'type':157 'unit':122 'usdc':14,28,91,124,133 'usdc-settlement' 'util':76 'via':38,111 'wallet':175 'x402':2,16,40,97,113,151 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"da88dd90-0bef-45b2-a8a4-b1f102bdc3c8","listingId":"b98c7888-f3d6-4780-ba13-a69e50f1877a","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/164/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":"2026-04-18T18:41:22.293Z"}],"sources":[{"listingId":"b98c7888-f3d6-4780-ba13-a69e50f1877a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/164/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:22.293Z","lastSeenAt":"2026-04-27T19:33:55.346Z"}],"details":{"listingId":"b98c7888-f3d6-4780-ba13-a69e50f1877a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/164/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 x402Version 1, exact scheme, on Base network, with maxAmountRequired of 20000 base units of USDC","source_url":"https://lowpaymentfee.com/api/v1/accounts/164/balance"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/164/balance"}],"useCases":["Querying account balance information via a single paid API call","Agent-driven workflows that need on-demand balance lookups without pre-registration","Demonstrating x402 payment protocol integration for per-request billing"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-per-call API access on Base","Low-volume, on-demand balance queries without subscription commitments"],"notFor":["High-volume balance monitoring requiring bulk or streaming access","Users who need detailed documentation or guaranteed SLAs","Anyone needing balance data for accounts other than ID 164 (unless the path is parameterized)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:33.473Z"},"updatedAt":"2026-04-27T19:33:55.346Z"}}