{"id":"5c4708da-fb25-4ee5-afef-c34f682ac48f","shortId":"4aDRX6","kind":"x402","title":"Query HNT wallet balances via x402 micropayment on Base for $0.02 per request.","tagline":"Query HNT wallet balances via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns Helium (HNT) wallet balance data, accessible through the x402 payment protocol. It is part of a broader suite of pay-per-call APIs offered by the same provider, spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints on the platform share a uniform $0.02-per-request pricing model settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/wallet/HNT/balance` accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers attach an `X-PAYMENT` header containing a signed USDC payment of up to 20,000 base units (i.e., $0.02 given USDC's 6 decimals) to the provider's address on Base. No API keys, accounts, or rate limits are advertised — access is purely gated by micropayment.\n\nDocumentation beyond the landing page is extremely sparse. The /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no additional technical detail, request/response schemas, or usage examples. As a result, the exact request body format and response schema for this wallet balance endpoint are unknown and must be inferred from the URL path structure alone.","tags":[],"capabilities":["x402-payment","hnt-wallet-balance","crypto-balance-query","usdc-base-settlement","pay-per-request"],"categories":["crypto","finance"],"synonyms":["Helium wallet balance","HNT balance API","crypto wallet balance","Helium network balance","wallet balance lookup","HNT account balance","x402 crypto API"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no technical content.","Request body schema and response schema are unknown; the example request is purely inferred from the URL structure.","The provider lists many endpoints across diverse categories (AI, analytics, finance, utilities) all at $0.02 — it is unclear whether all are fully functional or placeholders."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/HNT/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/HNT/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and confirms pricing and settlement details, but there is virtually no documentation for this specific endpoint. Request/response schemas are entirely unknown; the example request body is inferred from the URL path. The /docs, /pricing, and /README pages are empty beyond a wallet-connect 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'/api/v1/wallet/hnt/balance':95 '/docs':167 '/pricing':168 '/readme':171 '0.02':11,24,79,130 '000':126 '20':125 '6':134 'HNT account balance' 'HNT balance API' 'Helium network balance' 'Helium wallet balance' 'accept':96 'access':37,152 'account':146 'addit':182 'address':140 'advertis':151 'ai/ml':64 'alon':217 'analyt':63 'api':55,144 'attach':111 'balanc':4,17,35,204 'base':9,22,90,127,142 'beyond':159 'bodi':196 'broader':48 'call':54 'caller':110 'connect':177 'contain':117 'crypto':67 'crypto wallet balance' 'crypto-balance-query' 'data':36,62 'decim':135 'detail':184 'document':158 'endpoint':28,72,94,205 'exact':194 'exampl':189 'extrem':164 'financ':66 'format':197 'gate':155 'given':131 'handl':104 'header':116 'helium':32 'hnt':2,15,33 'hnt-wallet-balance' 'i.e':129 'infer':65,211 'inlin':105 'json':101 'key':145 'land':161 'limit':149 'lowpaymentfee.com':30 'micropay':7,20,157 'model':84 'must':209 'network':91 'offer':56 'page':162,172 'part':45 'path':215 'pay':52 'pay-per-cal':51 'pay-per-request' 'payment':41,102,115,121 'per':12,25,53,81 'per-request':80 'platform':75 'post':97 'price':83 'prompt':179 'protocol':42,109 'provid':60,138 'pure':154 'queri':1,14 'rate':148 'render':174 'request':13,26,82,98,195 'request/response':185 'respons':199 'result':192 'return':31,100 'schema':186,200 'servic':70 'settl':85 'share':76 'sign':119 'span':61 'spars':165 'specif':93 'structur':216 'suit':49 'technic':183 'uniform':78 'unit':128 'unknown':207 'url':214 'usag':188 'usdc':87,120,132 'usdc-base-settlement' 'util':69 'via':5,18,106 'wallet':3,16,34,178,203 'wallet balance lookup' 'x':114 'x-payment':113 'x402':6,19,40,108 'x402 crypto API' 'x402-payment'","prices":[{"id":"121e30f6-5dd0-4336-842e-467942400f48","listingId":"5c4708da-fb25-4ee5-afef-c34f682ac48f","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/HNT/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":"2026-04-18T19:28:28.204Z"}],"sources":[{"listingId":"5c4708da-fb25-4ee5-afef-c34f682ac48f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/HNT/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:28.204Z","lastSeenAt":"2026-04-23T09:31:50.394Z"}],"details":{"listingId":"5c4708da-fb25-4ee5-afef-c34f682ac48f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/HNT/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-signed-payment-header>\" \\\n  -d '{\"address\": \"<HNT_WALLET_ADDRESS>\"}'","exampleRequest":{"address":"13YKDSxaLC7f9xMPKBMhH7BRxFdGvPqaGZMkBMwYxMbxcFCMYBk"},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns HTTP 402 with an x402 challenge requiring USDC payment on Base, maxAmountRequired 20000 base units ($0.02).","source_url":"https://lowpaymentfee.com/api/v1/wallet/HNT/balance"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network is used for payment.","source_url":"https://lowpaymentfee.com/api/v1/wallet/HNT/balance"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompt with no additional content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying the balance of a Helium (HNT) wallet address programmatically","Building dashboards that display HNT holdings in real time","Automated portfolio tracking that includes Helium tokens","Agent-driven workflows that need to verify HNT balances before executing transactions"],"bestFor":["Developers needing on-demand HNT wallet balance checks without API key management","AI agents that can settle micropayments via x402 on Base","Low-volume or sporadic queries where pay-per-call is more economical than a subscription"],"notFor":["High-frequency bulk balance queries where $0.02/request adds up quickly","Users who need detailed HNT transaction history or staking data (not indicated by this endpoint)","Anyone unable to settle USDC payments on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.197Z"},"updatedAt":"2026-04-23T09:31:50.394Z"}}