{"id":"f5db14bf-e194-4553-988f-dec5ca0b85cf","shortId":"6CJW9H","kind":"x402","title":"Query OCEAN token wallet balance via x402 micropayment on Base for $0.02 per request.","tagline":"Query OCEAN token wallet balance via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns the balance of an OCEAN token wallet. It is part of a broader suite of pay-per-call APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and utility services. All endpoints are gated behind the x402 payment protocol, settling in USDC on the Base network.\n\nThe specific endpoint `/api/v1/wallet/OCEAN/balance` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which uses 6 decimals), equating to $0.02 per request. Payment is made via the \"exact\" scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.\n\nThe provider's landing page advertises a flat $0.02/request pricing model across all endpoints with no API keys, no rate limits, and instant access. However, documentation pages beyond the landing page returned only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The exact request body format and response structure for this wallet balance endpoint are unknown.","tags":[],"capabilities":["wallet-balance-query","ocean-token","x402-payment","usdc-settlement","base-network","pay-per-call","json-api"],"categories":["crypto","finance"],"synonyms":["OCEAN balance","OCEAN wallet","token balance API","crypto wallet balance","Ocean Protocol balance","x402 crypto API","micropayment API"],"warnings":["No OpenAPI or schema documentation available; request/response formats are unknown and inferred","All documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no useful content","The specific wallet/OCEAN/balance endpoint is not listed on the provider's landing page among advertised APIs","Example request JSON is speculative — actual required fields are undocumented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/OCEAN/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/OCEAN/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 spec, no documented request/response schema, and all docs pages return only 'Connect wallet' with no technical content. The request body and response format are entirely 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'/request':144 '0.02':12,26,116,143 '000':103 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':128 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':109 '20':102 '300':133 '6':112 'OCEAN balance' 'OCEAN wallet' 'Ocean Protocol balance' 'accept':88 'access':159 'across':147 'address':127 'advertis':97,140 'ai/ml':62 'analyt':61 'api':53,152 'asset':108 'avail':191 'balanc':5,19,35,207 'base':10,24,82,104 'base-network' 'behind':72 'beyond':163 'bodi':199 'broader':46 'call':52 'challeng':96 'connect':170 'cost':100 'crawl':194 'crypto wallet balance' 'data':60 'decim':113 'detail':177 'document':161,186 'endpoint':30,69,86,149,208 'equat':114 'exact':124,197 'exampl':190 'finance/web3':64 'flat':142 'format':200 'gate':71 'howev':160 'infer':63 'instant':158 'json':93 'json-api' 'key':153 'land':138,165 'limit':156 'lowpaymentfee.com':32 'made':121 'materi':195 'maximum':99 'micropay':8,22 'micropayment API' 'model':146 'network':83 'ocean':2,16,38 'ocean-token' 'offer':54 'openapi':181 'page':139,162,166 'part':43 'pay':50 'pay-per-cal':49 'pay-per-call' 'payment':75,119 'per':13,27,51,117 'post':89 'price':145 'prompt':172 'protocol':76 'provid':58,136 'queri':1,15 'rate':155 'request':14,28,90,118,198 'request/response':184 'respons':202 'return':33,92,167 'schema':185 'scheme':125 'second':134 'servic':67 'settl':77 'span':59 'spec':182 'specif':85 'structur':203 'suit':47 'technic':176 'timeout':131 'token':3,17,39 'token balance API' 'unit':105 'unknown':210 'usag':189 'usdc':79,107 'usdc-settlement' 'use':111 'util':66 'via':6,20,122 'wallet':4,18,40,171,206 'wallet-balance-query' 'x402':7,21,74,95 'x402 crypto API' 'x402-payment'","prices":[{"id":"76435bc3-a72a-453c-adfe-3b353e637896","listingId":"f5db14bf-e194-4553-988f-dec5ca0b85cf","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/OCEAN/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":"2026-04-18T19:28:25.183Z"}],"sources":[{"listingId":"f5db14bf-e194-4553-988f-dec5ca0b85cf","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/OCEAN/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:25.183Z","lastSeenAt":"2026-04-23T11:04:02.734Z"}],"details":{"listingId":"f5db14bf-e194-4553-988f-dec5ca0b85cf","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/OCEAN/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -d '{\"address\": \"0xYourWalletAddress\"}'","exampleRequest":{"address":"0x1234567890abcdef1234567890abcdef12345678"},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge advertises maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/wallet/OCEAN/balance"},{"claim":"The provider advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The provider offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Checking the OCEAN token balance of a specific wallet address","Integrating OCEAN balance lookups into trading bots or portfolio dashboards","Automated monitoring of OCEAN holdings across wallets"],"bestFor":["Agents needing on-demand OCEAN wallet balance without API key registration","Developers who prefer pay-per-call pricing over subscription models","Quick one-off balance checks settled via USDC on Base"],"notFor":["High-frequency polling where $0.02/request adds up quickly compared to free RPC calls","Users needing balances for tokens other than OCEAN (separate endpoints exist but are not documented here)","Anyone requiring detailed transaction history rather than a simple balance"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.31Z"},"updatedAt":"2026-04-23T11:04:02.734Z"}}