{"id":"40d6ffa1-f977-403a-924b-b13a4eed6fad","shortId":"J9AyMq","kind":"x402","title":"Check HBAR wallet balances via x402 micropayment — $0.02 per request on Base.","tagline":"Check HBAR wallet balances via x402 micropayment — $0.02 per request on Base.","description":"This endpoint at lowpaymentfee.com returns HBAR (Hedera) wallet balance data, gated behind the x402 payment protocol. Each call costs $0.02 (20,000 base units of USDC on the Base network, where USDC has 6 decimals). No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the endpoint.\n\nThe provider operates a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on Base. This specific endpoint focuses on retrieving the balance of an HBAR wallet. The endpoint accepts POST requests and returns JSON.\n\nDocumentation beyond the landing page is extremely thin — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the lack of documentation means callers will need to experiment to discover the expected request body format and response structure.","tags":[],"capabilities":["hbar-wallet-balance","x402-payment","usdc-base-settlement","crypto-balance-lookup","pay-per-request"],"categories":["crypto","finance"],"synonyms":["HBAR balance API","Hedera wallet balance","crypto wallet balance check","HBAR account balance","Hedera balance lookup","x402 crypto API"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README pages are all empty beyond a wallet connect prompt","No OpenAPI or schema definition found; request body format and response structure are unknown","The example_request_json is speculative — the actual expected POST body is undocumented","Provider lists many endpoints but none have documented schemas; platform maturity is unclear"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/HBAR/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/HBAR/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 and returns a valid x402 challenge with clear pricing, but there is virtually no documentation — no OpenAPI spec, no request/response schemas, no examples. The request body format and response structure are entirely unknown and had to be guessed. All secondary pages returned only 'Connect wallet' with no 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'/docs':151 '/pricing':152 '/readme':155 '0.02':8,20,44,113 '000':46 '20':45 '402':194 '6':58 'HBAR account balance' 'HBAR balance API' 'Hedera balance lookup' 'Hedera wallet balance' 'accept':136 'access':83 'addit':166 'ai/ml':103 'analyt':102 'api':61,99 'attach':70 'avail':182 'balanc':4,16,33,129 'base':12,24,47,53,121 'behind':36 'beyond':143 'bodi':213 'broader':90 'call':42,98 'caller':68,203 'challeng':196 'check':1,13 'confirm':189 'connect':161 'cost':43 'crawl':185 'crypto wallet balance check' 'crypto-balance-lookup' 'data':34,101,106 'decim':59 'detail':168 'discov':209 'document':142,177,201 'dozen':93 'endpoint':26,85,124,135,187 'exampl':181 'expect':211 'experi':207 'extrem':148 'finance/web3':105 'focus':125 'format':214 'gate':35 'hbar':2,14,30,132 'hbar-wallet-balance' 'header':75 'hedera':31 'infer':104 'infrastructur':108 'json':141 'key':62 'lack':199 'land':145 'limit':65 'live':190 'lowpaymentfee.com':28 'mean':202 'micropay':7,19 'need':205 'network':54 'offer':92 'openapi':172 'oper':88 'page':146,156 'pay':96 'pay-per-cal':95 'pay-per-request' 'payment':39,74,80 'per':9,21,97,114 'platform':91 'post':137 'price':111 'prompt':163 'proof':81 'proper':193 'protocol':40 'provid':87 'rate':64 'render':158 'request':10,22,115,138,212 'request/response':175 'requir':67 'respons':216 'retriev':127 'return':29,140,191 'schema':176 'settl':117 'simpli':69 'span':100 'spec':173 'specif':123 'structur':217 'technic':167 'thin':149 'unit':48 'usag':180 'usdc':50,56,119 'usdc-base-settlement' 'util':109 'valid':78 'via':5,17 'wallet':3,15,32,133,162 'x':73 'x-payment':72 'x402':6,18,38,79,195 'x402 crypto API' 'x402-payment'","prices":[{"id":"252619ff-caa8-4993-9825-f3d55efa61f9","listingId":"40d6ffa1-f977-403a-924b-b13a4eed6fad","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/HBAR/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":"2026-04-18T19:28:16.635Z"}],"sources":[{"listingId":"40d6ffa1-f977-403a-924b-b13a4eed6fad","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/HBAR/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:16.635Z","lastSeenAt":"2026-04-23T12:32:03.065Z"}],"details":{"listingId":"40d6ffa1-f977-403a-924b-b13a4eed6fad","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/HBAR/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -d '{\"address\": \"0.0.12345\"}'","exampleRequest":{"address":"0.0.12345"},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/wallet/HBAR/balance"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/wallet/HBAR/balance"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Provider offers APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Querying HBAR wallet balances programmatically without API key registration","Integrating Hedera balance checks into agent workflows that support x402 payments","Building portfolio trackers that need on-demand HBAR balance data"],"bestFor":["AI agents or bots that can pay per-call via x402 on Base","Developers who want instant access to HBAR balance data without signup","Low-volume or sporadic balance lookups where $0.02/call is cost-effective"],"notFor":["High-frequency balance monitoring where per-call costs would accumulate quickly","Users who need detailed HBAR transaction history or account metadata beyond balance","Developers who require comprehensive API documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.668Z"},"updatedAt":"2026-04-23T12:32:03.065Z"}}