{"id":"817ac99a-5f66-437e-8b8a-cf31c3dcb2df","shortId":"bmHg2W","kind":"x402","title":"Query NEO wallet balance via x402 micropayment on Base for $0.02 per request.","tagline":"Query NEO wallet balance via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns the balance of a NEO wallet, accessed via the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The cost per request is 20,000 base units of USDC (6 decimals), which equals $0.02. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment to receive the response.\n\nThe provider, lowpaymentfee.com, hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities, all priced at $0.02 per request. This specific endpoint falls under the Finance & Web3 category. The x402 challenge specifies the \"exact\" payment scheme, settling via USDC (contract 0x8335…2913) on Base to the payTo address 0x1A2B…85F3, with a 300-second payment timeout.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what parameters the endpoint accepts or what shape the response takes. The endpoint is confirmed live via the 402 challenge, but the actual behavior after payment is undocumented.","tags":[],"capabilities":["neo-wallet-balance","x402-payment","usdc-base-settlement","pay-per-call","no-api-key","crypto-balance-query"],"categories":["crypto","finance"],"synonyms":["NEO balance API","NEO wallet query","crypto wallet balance","NEO blockchain balance","x402 crypto API","micropayment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No request or response schema documented; actual behavior after payment is unknown.","No examples of what input the POST body should contain or what the response looks like.","The provider lists many endpoints across diverse categories (AI, analytics, finance, utils) all at the same price, which may indicate a generic or placeholder catalog."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/NEO/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/NEO/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing, but there is zero documentation on request parameters, response schema, or actual functionality. Docs pages are empty stubs. No OpenAPI spec or examples 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'000':67 '0x1a2b':159 '0x8335':151 '20':66 '2913':152 '300':163 '402':51,220 '6':72 '85f3':160 'NEO balance API' 'NEO blockchain balance' 'NEO wallet query' 'accept':206 'access':38 'actual':224 'address':158 'ai/ml':118 'analyt':117 'api':78,114,173 'attach':87 'balanc':4,17,33 'base':9,22,59,68,154 'behavior':225 'broad':107 'call':113 'caller':85 'catalog':108 'categori':138 'challeng':52,141,221 'confirm':216 'connect':182 'contract':150 'cost':62 'crypto wallet balance' 'crypto-balance-query' 'data':116 'decim':73 'descript':200 'detail':189 'doc':172 'document':167 'endpoint':28,45,132,205,214 'equal':75 'exact':144 'exampl':197 'extrem':169 'fall':133 'financ':136 'finance/web3':120 'header':92 'host':105 'infer':119 'infrastructur':122 'key':79 'limit':82 'live':47,217 'lowpaymentfee.com':30,104 'micropay':7,20 'micropayment API' 'neo':2,15,36 'neo-wallet-balance' 'network':60 'no-api-key' 'openapi':193 'page':177 'paramet':203 'pay':111 'pay-per-cal':110 'pay-per-call' 'payment':42,54,91,97,145,165,227 'payto':157 'per':12,25,63,112,128 'price':125,174 'prompt':184 'protocol':43 'provid':103 'queri':1,14 'rate':81 'readm':176 'receiv':99 'render':179 'request':13,26,64,129 'request/response':196 'requir':53,84 'respons':101,211 'return':31,49 'schema':194 'scheme':146 'second':164 'settl':147 'shape':209 'simpli':86 'span':115 'spars':170 'specif':131 'specifi':142 'take':212 'technic':188 'timeout':166 'undocu':229 'unit':69 'usdc':56,71,149 'usdc-base-settlement' 'util':123 'valid':95 'via':5,18,39,148,218 'wallet':3,16,37,183 'web3':137 'x':90 'x-payment':89 'x402':6,19,41,96,140 'x402 crypto API' 'x402-payment'","prices":[{"id":"d1d6bab1-deca-4767-9b37-ce4f7f839c7b","listingId":"817ac99a-5f66-437e-8b8a-cf31c3dcb2df","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/NEO/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":"2026-04-18T19:28:25.780Z"}],"sources":[{"listingId":"817ac99a-5f66-437e-8b8a-cf31c3dcb2df","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/NEO/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:25.780Z","lastSeenAt":"2026-04-23T11:04:02.734Z"}],"details":{"listingId":"817ac99a-5f66-437e-8b8a-cf31c3dcb2df","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/NEO/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 requiring USDC payment on Base network with maxAmountRequired of 20000 base units.","source_url":"https://lowpaymentfee.com/api/v1/wallet/NEO/balance"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.","source_url":"https://lowpaymentfee.com/api/v1/wallet/NEO/balance"}],"useCases":["Checking the balance of a NEO wallet address programmatically","Integrating NEO balance lookups into trading bots or portfolio dashboards","Agent-driven crypto portfolio monitoring with per-call payment"],"bestFor":["Developers needing quick NEO balance checks without API key signup","AI agents that can settle x402 micropayments on Base","Low-volume or sporadic NEO balance queries where pay-per-call is economical"],"notFor":["High-volume NEO balance polling where $0.02/request adds up quickly","Users needing detailed NEO transaction history or UTXO data (not documented)","Querying non-NEO blockchain balances (this endpoint is NEO-specific)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.312Z"},"updatedAt":"2026-04-23T11:04:02.734Z"}}