{"id":"8ee3c389-83be-4014-8a6a-85e5abdace49","shortId":"cjxtGx","kind":"x402","title":"Query Tezos (XTZ) wallet balances via x402 micropayment on Base for $0.02 per request.","tagline":"Query Tezos (XTZ) wallet balances via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns Tezos (XTZ) wallet balance data, gated behind an x402 payment challenge. Each request costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no sign-up required. The caller simply includes an X-PAYMENT header with a valid x402 payment proof to access the response.\n\nThe endpoint is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com spanning data analytics, AI/ML inference, finance/Web3 data, and utility services, all priced uniformly at $0.02 per request. The specific endpoint `/api/v1/wallet/XTZ/balance` falls under the Finance & Web3 category and is designed to return balance information for a given Tezos address.\n\nDocumentation on the site is extremely sparse — the docs, pricing, and API pages all render 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 provider. The x402 challenge confirms the endpoint is live and accepting POST requests, settling payments to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.","tags":[],"capabilities":["xtz-wallet-balance","tezos-balance-lookup","x402-payment-gated","base-network-usdc","pay-per-request","no-api-key"],"categories":["crypto","finance"],"synonyms":["Tezos balance API","XTZ wallet balance","crypto wallet balance","Tezos address lookup","blockchain balance query","XTZ balance check"],"warnings":["No OpenAPI or schema documentation available from the provider","Docs, pricing, and API pages all render only 'Connect wallet' with no technical content","Request body format and response schema are entirely inferred — no examples from provider","The broader site lists many API categories but it is unclear how mature or functional each endpoint is"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/XTZ/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/XTZ/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 payment details, but there is zero documentation on request/response schemas, no OpenAPI spec, and the docs pages are empty stubs. The request and response examples are inferred, not 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'0.02':12,26,48,117 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':200 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':203 'Tezos address lookup' 'Tezos balance API' 'XTZ balance check' 'XTZ wallet balance' 'accept':193 'access':83 'address':141,199 'ai/ml':106 'analyt':105 'api':56,99,153 'avail':180 'balanc':5,19,37,135 'base':10,24,53,205 'base-network-usdc' 'behind':40 'blockchain balance query' 'broader':92 'call':98 'caller':68 'categori':129 'challeng':44,186 'confirm':187 'connect':159 'cost':47 'crypto wallet balance' 'data':38,104,109 'design':132 'detail':166 'doc':150 'document':142,175 'endpoint':30,87,122,189 'exampl':179 'extrem':147 'fall':124 'financ':127 'finance/web3':108 'gate':39 'given':139 'header':75 'includ':70 'infer':107 'inform':136 'key':57 'limit':60 'live':191 'lowpaymentfee.com':32,102 'micropay':8,22 'network':54 'no-api-key' 'offer':100 'openapi':170 'page':154 'part':89 'pay':96 'pay-per-cal':95 'pay-per-request' 'payment':43,74,80,197 'per':13,27,97,118 'post':194 'price':114,151 'prompt':161 'proof':81 'provid':183 'queri':1,15 'rate':59 'render':156 'request':14,28,46,119,195 'request/response':173 'requir':66 'respons':85 'return':33,134 'schema':174 'servic':112 'settl':196 'sign':64 'sign-up':63 'simpli':69 'site':145 'span':103 'spars':148 'spec':171 'specif':121 'suit':93 'technic':165 'tezo':2,16,34,140 'tezos-balance-lookup' 'uniform':115 'usag':178 'usdc':50,202 'use':201 'util':111 'valid':78 'via':6,20 'wallet':4,18,36,160 'web3':128 'x':73 'x-payment':72 'x402':7,21,42,79,185 'x402-payment-gated' 'xtz':3,17,35 'xtz-wallet-balance'","prices":[{"id":"6431400c-753c-411d-bd44-790888116b6f","listingId":"8ee3c389-83be-4014-8a6a-85e5abdace49","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/XTZ/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":"2026-04-18T19:28:39.233Z"}],"sources":[{"listingId":"8ee3c389-83be-4014-8a6a-85e5abdace49","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/XTZ/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:39.233Z","lastSeenAt":"2026-04-23T09:31:50.833Z"}],"details":{"listingId":"8ee3c389-83be-4014-8a6a-85e5abdace49","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/XTZ/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -d '{\"address\": \"tz1...\"}'","exampleRequest":{"address":"tz1VSUr8wwNhLAzempoch5d6hLRiTh8Cjcjb"},"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","source_url":"https://lowpaymentfee.com/api/v1/wallet/XTZ/balance"},{"claim":"All APIs on the site are priced at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/wallet/XTZ/balance"},{"claim":"Payment is sent to 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/wallet/XTZ/balance"}],"useCases":["Querying the balance of a Tezos wallet address programmatically","Building portfolio trackers that need XTZ balance data","Automated agents verifying Tezos holdings before executing trades","Dashboards displaying multi-chain wallet balances"],"bestFor":["Agents or apps needing on-demand Tezos balance lookups without API key management","Developers who prefer pay-per-call pricing with no subscription commitment","x402-compatible clients that can settle micropayments on Base"],"notFor":["High-volume bulk balance queries where $0.02/request adds up quickly","Users who need detailed Tezos transaction history or staking data (only balance is indicated)","Developers without an x402-compatible payment flow or Base USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.582Z"},"updatedAt":"2026-04-23T09:31:50.833Z"}}