{"id":"f4bbae33-ec8d-4110-86e4-497d35e23afb","shortId":"dXdcQU","kind":"x402","title":"Check VET (VeChain) wallet balances via x402 micropayment — $0.02 per request on Base.","tagline":"Check VET (VeChain) wallet balances via x402 micropayment — $0.02 per request on Base.","description":"This endpoint at lowpaymentfee.com returns VeChain (VET) wallet balance data, accessed 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/Web3, and infrastructure utilities. 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/VET/balance` accepts POST requests and returns JSON. Payment is handled via the x402 exact-payment scheme: callers attach an `X-PAYMENT` header with a signed USDC payment of up to 20,000 base units (i.e., $0.02, since USDC uses 6 decimals) to the provider's address on Base. No API keys, subscriptions, or rate limits are advertised — access is purely pay-per-call.\n\nDocumentation is extremely sparse. The provider's 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, and no usage examples available from the crawled material. The endpoint is confirmed live (returns a proper 402 challenge), but the actual request format (e.g., whether a wallet address is passed in the POST body or as a query parameter) and the response schema are unknown.","tags":[],"capabilities":["vet-wallet-balance","x402-micropayment","usdc-base-settlement","pay-per-call","crypto-balance-lookup"],"categories":["crypto","finance"],"synonyms":["VeChain balance API","VET balance check","crypto wallet balance","VeChain wallet lookup","blockchain balance query","VET address balance"],"warnings":["No documentation available — docs, pricing, and API pages all render only 'Connect wallet' with no technical content.","Request body schema is unknown; the example_request_json is speculative.","Response schema is completely unknown; no example_response_json can be provided.","No OpenAPI or machine-readable spec found.","The broader platform lists many endpoints but none have documented schemas."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/VET/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/VET/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 402 challenge with clear pricing. However, documentation is essentially nonexistent — no OpenAPI spec, no request/response schemas, no examples. The request body format and response structure are entirely inferred. This is effectively a stub 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'0.02':9,22,78,131 '000':127 '20':126 '402':209 '6':135 'VET address balance' 'VET balance check' 'VeChain balance API' 'VeChain wallet lookup' 'accept':95 'access':37,153 'actual':213 'address':141,220 'advertis':152 'ai/ml':64 'analyt':63 'api':55,145,170 'attach':112 'avail':196 'balanc':5,18,35 'base':13,26,89,128,143 'blockchain balance query' 'bodi':226 'broader':48 'call':54,159 'caller':111 'challeng':210 'check':1,14 'confirm':204 'connect':176 'crawl':199 'crypto wallet balance' 'crypto-balance-lookup' 'data':36,62 'decim':136 'detail':183 'doc':167 'document':160 'e.g':216 'endpoint':28,71,93,202 'exact':108 'exact-pay':107 'exampl':195 'extrem':162 'finance/web3':66 'format':215 'handl':103 'header':117 'i.e':130 'infer':65 'infrastructur':68 'json':100 'key':146 'limit':150 'live':205 'lowpaymentfee.com':30 'materi':200 'micropay':8,21 'model':83 'network':90 'offer':56 'openapi':187 'page':171 'paramet':231 'part':45 'pass':222 'pay':52,157 'pay-per-cal':51,156 'pay-per-call' 'payment':41,101,109,116,122 'per':10,23,53,80,158 'per-request':79 'platform':74 'post':96,225 'price':82,168 'prompt':178 'proper':208 'protocol':42 'provid':60,139,165 'pure':155 'queri':230 'rate':149 'render':173 'request':11,24,81,97,214 'request/response':190 'respons':234 'return':31,99,206 'schema':191,235 'scheme':110 'settl':84 'share':75 'sign':120 'sinc':132 'span':61 'spars':163 'spec':188 'specif':92 'subscript':147 'suit':49 'technic':182 'uniform':77 'unit':129 'unknown':237 'usag':194 'usdc':86,121,133 'usdc-base-settlement' 'use':134 'util':69 'vechain':3,16,32 'vet':2,15,33 'vet-wallet-balance' 'via':6,19,104 'wallet':4,17,34,177,219 'whether':217 'x':115 'x-payment':114 'x402':7,20,40,106 'x402-micropayment'","prices":[{"id":"a80e972f-7354-4206-845e-5aa00dcef84a","listingId":"f4bbae33-ec8d-4110-86e4-497d35e23afb","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/VET/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":"2026-04-18T19:28:31.287Z"}],"sources":[{"listingId":"f4bbae33-ec8d-4110-86e4-497d35e23afb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/VET/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:31.287Z","lastSeenAt":"2026-04-23T09:31:50.523Z"}],"details":{"listingId":"f4bbae33-ec8d-4110-86e4-497d35e23afb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/VET/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-signed-payment-header>\" \\\n  -d '{\"address\": \"0xYourVETAddress\"}'","exampleRequest":{"address":"0x1234567890abcdef1234567890abcdef12345678"},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base with maxAmountRequired of 20000 base units.","source_url":"https://lowpaymentfee.com/api/v1/wallet/VET/balance"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is the canonical USDC contract on Base.","source_url":"https://lowpaymentfee.com/api/v1/wallet/VET/balance"}],"useCases":["Querying VeChain (VET) wallet balances programmatically","Integrating VET balance checks into portfolio trackers or dashboards","Automated agents checking on-chain VET holdings before executing trades"],"bestFor":["Developers needing quick, keyless VET balance lookups","AI agents with x402-compatible wallets on Base","Pay-as-you-go crypto data queries without subscription overhead"],"notFor":["Bulk or high-volume balance scanning (no documented batch support)","Users who need detailed VET transaction history or token transfer data","Anyone without a Base-network USDC wallet for x402 payments"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.983Z"},"updatedAt":"2026-04-23T09:31:50.523Z"}}