{"id":"7fe76f06-d70d-4467-8179-0c3a51ec7910","shortId":"qK8DmN","kind":"x402","title":"Query SUI wallet balance via x402 micropayment on Base network for $0.02 per request.","tagline":"Query SUI wallet balance via x402 micropayment on Base network for $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides SUI wallet balance lookups, paid per-request via the x402 protocol. The payment is settled on the Base network using USDC (USD Coin) at a cost of $0.02 per call (20,000 base units with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid payment proof.\n\nThe provider hosts a broader suite of APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced uniformly at $0.02 per request. This specific endpoint targets the SUI blockchain, returning wallet balance information. The x402 challenge confirms the endpoint is live, accepts POST requests, and outputs application/json.\n\nDocumentation on the site is minimal — the docs, pricing, and API pages all resolve to a \"Connect wallet\" prompt with no further technical detail. No OpenAPI schema, request/response examples, or parameter documentation were found. The exact request body format and response structure are undocumented.","tags":[],"capabilities":["sui-wallet-balance","x402-payment","usdc-base-network","per-request-micropayment","no-api-key","no-rate-limit"],"categories":["crypto","finance"],"synonyms":["SUI balance check","SUI wallet lookup","crypto wallet balance API","SUI blockchain balance","Web3 balance query"],"warnings":["No API documentation available — docs/pricing/API pages all show only 'Connect wallet'","Request body schema is completely undocumented; the example_request_json is speculative","Response format is unknown — no sample responses found anywhere","Provider appears to be a generic multi-API platform; unclear if SUI balance endpoint actually returns real blockchain data"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/SUI/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/SUI/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 402 challenge with clear pricing, but there is zero documentation on request parameters, response format, or error handling. The docs pages are empty stubs. Request/response examples are inferred, not 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'000':66 '20':65 '6':70 'SUI balance check' 'SUI blockchain balance' 'SUI wallet lookup' 'Web3 balance query' 'accept':137 'ai/ml':104 'analyt':103 'api':73,100,153 'application/json':142 'attach':82 'balanc':4,18,36,127 'base':9,23,52,67 'blockchain':124 'bodi':180 'broader':97 'call':64 'caller':80 'challeng':131 'coin':57 'confirm':132 'connect':159 'cost':60 'crypto wallet balance API' 'data':102,107 'decim':71 'detail':166 'doc':150 'document':143,174 'endpoint':30,120,134 'exact':178 'exampl':171 'finance/web3':106 'format':181 'found':176 'header':87 'host':95 'infer':105 'inform':128 'infrastructur':109 'key':74 'limit':77 'live':136 'lookup':37 'lowpaymentfee.com':32 'micropay':7,21 'minim':148 'network':10,24,53 'no-api-key' 'no-rate-limit' 'openapi':168 'output':141 'page':154 'paid':38 'paramet':173 'payment':47,86,91 'per':13,27,40,63,116 'per-request':39 'per-request-micropayment' 'post':138 'price':112,151 'prompt':161 'proof':92 'protocol':45 'provid':33,94 'queri':1,15 'rate':76 'request':14,28,41,117,139,179 'request/response':170 'requir':79 'resolv':156 'respons':183 'return':125 'schema':169 'settl':49 'simpli':81 'site':146 'span':101 'specif':119 'structur':184 'sui':2,16,34,123 'sui-wallet-balance' 'suit':98 'target':121 'technic':165 'undocu':186 'uniform':113 'unit':68 'usd':56 'usdc':55 'usdc-base-network' 'use':54 'util':110 'valid':90 'via':5,19,42 'wallet':3,17,35,126,160 'x':85 'x-payment':84 'x402':6,20,44,130 'x402-payment'","prices":[{"id":"a44f99ca-7ec0-4464-8a3e-e3e514792423","listingId":"7fe76f06-d70d-4467-8179-0c3a51ec7910","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/SUI/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":"2026-04-18T19:28:19.668Z"}],"sources":[{"listingId":"7fe76f06-d70d-4467-8179-0c3a51ec7910","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/SUI/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:19.668Z","lastSeenAt":"2026-04-23T12:32:03.183Z"}],"details":{"listingId":"7fe76f06-d70d-4467-8179-0c3a51ec7910","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/SUI/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -d '{\"address\": \"0x...your_sui_address\"}'","exampleRequest":{"address":"0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge advertising USDC on Base at 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/wallet/SUI/balance"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wallet/SUI/balance"}],"useCases":["Checking SUI wallet balances programmatically without managing API keys","Integrating SUI balance lookups into agent workflows with pay-per-call pricing","Building portfolio trackers that query SUI holdings on demand"],"bestFor":["Agents needing on-demand SUI balance data without subscription commitments","Developers prototyping Web3 apps who want instant API access","Low-volume or sporadic balance queries where per-call pricing is economical"],"notFor":["High-frequency trading systems where $0.02/call adds up quickly","Users needing detailed SUI transaction history or NFT data (not offered here)","Anyone requiring documented request/response schemas before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.56Z"},"updatedAt":"2026-04-23T12:32:03.183Z"}}