{"id":"6db90017-8328-4867-acfd-fc6715f6e06b","shortId":"uYWR9F","kind":"x402","title":"Query KAVA wallet balances via x402 micropayment on Base for $0.02 per request.","tagline":"Query KAVA wallet balances via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns KAVA wallet balance data, accessible through the x402 payment protocol. It requires a per-call micropayment of $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, and the endpoint responds with JSON.\n\nThe provider operates a broader platform offering dozens of pay-per-call endpoints across categories including data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance and Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02-per-request pricing model settled in USDC on Base.\n\nDocumentation beyond the landing page is sparse — the /docs, /pricing, /api, and /README pages all resolve to a minimal \"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 crawled material. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the actual response format for a paid request is unknown.","tags":[],"capabilities":["wallet-balance","kava-blockchain","x402-payment","usdc-base","pay-per-request","no-api-key","json-response"],"categories":["crypto","finance"],"synonyms":["KAVA balance API","KAVA wallet lookup","crypto wallet balance","blockchain balance check","KAVA account balance","Web3 wallet query"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README all return only a 'Connect wallet' stub.","No OpenAPI or JSON schema provided; request and response formats are unknown and inferred.","The example_request_json is speculative — the actual required fields are undocumented.","Provider offers many endpoints across diverse categories (AI, finance, geo, etc.) with identical $0.02 pricing; unclear what backing services power these."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/KAVA/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/KAVA/balance","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 x402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no usage examples, and the docs pages are all empty stubs. The request body and response format are entirely 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'/docs':158 '/pricing':159 '/readme':162 '0.02':11,24,50,139 '402':203 'KAVA account balance' 'KAVA balance API' 'KAVA wallet lookup' 'Web3 wallet query' 'access':36 'across':104 'actual':208 'ai/ml':109 'analysi':112 'analyt':108 'api':58 'avail':190 'balanc':4,17,34 'base':9,22,55,149 'beyond':151 'blockchain balance check' 'broader':94 'call':47,102 'caller':70 'categori':105 'challeng':205 'classif':114 'confirm':198 'connect':169 'convers':132 'crawl':193 'crypto wallet balance' 'data':35,107 'detail':176 'document':150,185 'dozen':97 'embed':115 'endpoint':28,86,103,135,196 'estim':126 'exampl':189 'exchang':121 'feed':120 'financ':116 'format':210 'gas':125 'generat':133 'geocod':130 'header':77 'includ':72,106 'infer':110 'infrastructur':128 'json':89 'json-response' 'kava':2,15,32 'kava-blockchain' 'key':59 'land':153 'limit':62 'live':199 'lowpaymentfee.com':30 'materi':194 'micropay':7,20,48 'minim':168 'model':144 'network':56 'no-api-key' 'offer':96 'openapi':180 'oper':92 'page':154,163 'paid':213 'pay':100 'pay-per-cal':99 'pay-per-request' 'payment':40,76,82 'per':12,25,46,101,141 'per-cal':45 'per-request':140 'platform':95 'price':119,143 'prompt':171 'proof':83 'proper':202 'protocol':41 'provid':91 'queri':1,14 'quot':124 'rate':61,122 'request':13,26,142,214 'request/response':183 'requir':43,68 'resolv':165 'respond':87 'respons':209 'return':31,200 'schema':184 'sentiment':111 'settl':145 'share':136 'sign':66 'sign-up':65 'simpli':71 'spars':156 'spec':181 'summar':113 'technic':175 'token':123 'unknown':216 'usag':188 'usdc':52,147 'usdc-base' 'util':129 'valid':80,131 'via':5,18 'wallet':3,16,33,170 'wallet-balance' 'web3':118 'x':75 'x-payment':74 'x402':6,19,39,81,204 'x402-payment'","prices":[{"id":"3136300a-bdca-4ece-a93a-c20d883872fd","listingId":"6db90017-8328-4867-acfd-fc6715f6e06b","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/KAVA/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":"2026-04-18T19:28:24.576Z"}],"sources":[{"listingId":"6db90017-8328-4867-acfd-fc6715f6e06b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/KAVA/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:24.576Z","lastSeenAt":"2026-04-23T11:04:02.689Z"}],"details":{"listingId":"6db90017-8328-4867-acfd-fc6715f6e06b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/KAVA/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -d '{\"address\": \"kava1...\"}'","exampleRequest":{"address":"kava1exampleaddress123"},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units (USDC, 6 decimals = $0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/wallet/KAVA/balance"},{"claim":"Provider advertises $0.02 per request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/wallet/KAVA/balance"},{"claim":"Docs, pricing, API, and README pages all resolve to minimal 'Connect wallet' content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Checking KAVA token balances for a given wallet address","Integrating KAVA balance lookups into portfolio trackers or dashboards","Automated monitoring of KAVA wallet holdings by AI agents"],"bestFor":["Agents or apps needing on-demand KAVA balance queries without API key management","Developers who prefer pay-per-call pricing over subscription models","Quick prototyping where frictionless access matters more than detailed documentation"],"notFor":["High-volume batch queries where per-request costs add up quickly","Use cases requiring detailed transaction history or full blockchain indexing","Users who need comprehensive API documentation and SDKs before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.316Z"},"updatedAt":"2026-04-23T11:04:02.689Z"}}