{"id":"1b0fec7f-2b40-44b7-b687-2054effe3b62","shortId":"w3VjUg","kind":"x402","title":"Check LDO token wallet balance via x402 micropayment on Base for $0.02 per request.","tagline":"Check LDO token wallet balance via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns the balance of an LDO (Lido DAO) wallet. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, which spans data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform use the x402 payment protocol, settling in USDC on the Base network.\n\nThe specific endpoint `/api/v1/wallet/LDO/balance` is a POST endpoint that costs $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys or accounts are required — callers authenticate and pay via the x402 `X-PAYMENT` header. The x402 challenge was confirmed live, returning a 402 with an `exact` payment scheme targeting USDC (contract `0x8335...2913`) on Base. The maximum timeout for payment settlement is 300 seconds.\n\nDocumentation on the site 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 spec, no request/response schema, and no usage examples available from the crawled material. The endpoint's actual response format and required POST body (if any) are unknown.","tags":[],"capabilities":["wallet-balance-query","ldo-token","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key"],"categories":["crypto","finance"],"synonyms":["LDO balance","Lido DAO wallet balance","token balance API","crypto wallet balance","LDO wallet check","blockchain balance lookup"],"warnings":["No OpenAPI or schema documentation available — request body and response format are unknown","Docs, API, pricing, and README pages all render only 'Connect wallet' with no technical content","The specific endpoint path suggests LDO wallet balance, but no confirmation of what parameters are accepted or what the response looks like","This endpoint is part of a broad platform listing many diverse APIs; quality and reliability of individual endpoints is unverified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/LDO/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/wallet/LDO/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 via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The actual behavior of this endpoint is largely 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'0.02':12,26,95 '000':99 '0x8335':142 '20':98 '2913':143 '300':153 '402':133 '6':105 'LDO balance' 'LDO wallet check' 'Lido DAO wallet balance' 'account':111 'actual':201 'addit':178 'ai/ml':62 'analyt':61 'api':54,108,164 'authent':115 'avail':193 'balanc':5,19,35 'base':10,24,83,100,145 'base-network' 'blockchain balance lookup' 'bodi':207 'broader':47 'call':53 'caller':114 'challeng':127 'check':1,15 'confirm':129 'connect':173 'contract':141 'cost':94 'crawl':196 'crypto wallet balance' 'dao':40 'data':60 'decim':106 'detail':180 'doc':163 'document':155 'endpoint':30,69,87,92,199 'exact':136 'exampl':192 'extrem':160 'finance/web3':64 'format':203 'header':124 'infer':63 'infrastructur':66 'key':109 'ldo':2,16,38 'ldo-token' 'lido':39 'live':130 'lowpaymentfee.com':32,57 'materi':197 'maximum':147 'micropay':8,22 'network':84 'no-api-key' 'offer':55 'openapi':184 'page':168 'part':44 'pay':51,117 'pay-per-cal':50 'pay-per-call' 'payment':76,123,137,150 'per':13,27,52,96 'platform':72 'post':91,206 'price':165 'prompt':175 'protocol':77 'readm':167 'render':170 'request':14,28,97 'request/response':187 'requir':113,205 'respons':202 'return':33,131 'schema':188 'scheme':138 'second':154 'settl':78 'settlement':151 'site':158 'span':59 'spars':161 'spec':185 'specif':86 'suit':48 'target':139 'technic':179 'timeout':148 'token':3,17 'token balance API' 'unit':101 'unknown':211 'usag':191 'usdc':80,103,140 'usdc-settlement' 'use':73 'util':67 'via':6,20,118 'wallet':4,18,41,174 'wallet-balance-query' 'x':122 'x-payment':121 'x402':7,21,75,120,126 'x402-payment'","prices":[{"id":"c1cfaa1b-ac80-402e-8e75-296fe92c7993","listingId":"1b0fec7f-2b40-44b7-b687-2054effe3b62","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/wallet/LDO/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":"2026-04-18T19:28:24.576Z"}],"sources":[{"listingId":"1b0fec7f-2b40-44b7-b687-2054effe3b62","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/LDO/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:24.576Z","lastSeenAt":"2026-04-23T11:04:02.709Z"}],"details":{"listingId":"1b0fec7f-2b40-44b7-b687-2054effe3b62","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/LDO/balance \\\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":"The endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base network with maxAmountRequired of 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/wallet/LDO/balance"},{"claim":"All APIs on the platform cost $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 contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/wallet/LDO/balance"}],"useCases":["Querying the balance of an LDO token wallet programmatically","Integrating LDO balance checks into trading bots or portfolio dashboards","Automated monitoring of LDO holdings across wallets"],"bestFor":["Agents needing on-demand LDO wallet balance without API key management","Micropayment-friendly workflows that pay per call in USDC on Base","Quick one-off balance lookups without subscription commitments"],"notFor":["High-frequency polling where $0.02 per request adds up quickly","Users who need balances for many tokens in a single call (this endpoint is LDO-specific)","Anyone without a Base-network USDC wallet to settle x402 payments"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.311Z"},"updatedAt":"2026-04-23T11:04:02.709Z"}}