{"id":"e42691cd-bd3c-41b2-8486-76e1139274cf","shortId":"sJaT3C","kind":"x402","title":"Query SNX wallet balance on Base via x402 micropayment at $0.02 per request.","tagline":"Query SNX wallet balance on Base via x402 micropayment at $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns the wallet balance for the SNX (Synthetix) token. It is part of a broader suite of pay-per-call APIs offered by the provider, spanning data analytics, AI/ML inference, finance/Web3, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network.\n\nThe specific endpoint `/api/v1/wallet/SNX/balance` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which uses 6 decimals), equating to $0.02 per request. No API keys are required; payment is handled inline via the X-PAYMENT header. The provider advertises no rate limits and instant access.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, 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 example payloads available. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but the actual response format for a successful paid request is unknown.","tags":[],"capabilities":["wallet-balance-query","snx-token","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["crypto","finance"],"synonyms":["SNX balance","Synthetix wallet balance","crypto wallet balance API","token balance lookup","SNX balance check","x402 crypto API","Base network wallet"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown and inferred.","All documentation pages (/docs, /api, /pricing, /README) return only a 'Connect wallet' prompt with no content.","The example_request_json is speculative; the actual required fields are undocumented.","Provider offers a very broad set of unrelated APIs (AI, analytics, geocoding, finance) all at the same price, which may indicate a generic or placeholder service."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/SNX/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/SNX/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 no documentation, no OpenAPI spec, no response schema, and no examples. The request body format is entirely inferred. The docs pages are empty beyond a wallet-connect 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'/api/v1/wallet/snx/balance':83 '/docs':148 '/pricing':150 '/readme':152 '0.02':11,24,112 '000':99 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':105 '20':98 '402':186 '6':108 'Base network wallet' 'SNX balance' 'SNX balance check' 'Synthetix wallet balance' 'accept':84 'access':138 'actual':194 'addit':163 'advertis':93,132 'ai/ml':60 'analyt':59 'api':52,116 'asset':104 'avail':179 'balanc':4,17,34 'base':6,19,78,100 'base-network' 'beyond':140 'broader':45 'call':51 'challeng':92,191 'confirm':183 'connect':158 'cost':96 'crypto wallet balance API' 'data':58 'decim':109 'detail':165 'document':139,174 'endpoint':28,67,82,181 'equat':110 'exampl':177 'extrem':145 'finance/web3':62 'format':196 'handl':122 'header':129 'infer':61 'inlin':123 'instant':137 'json':89 'key':117 'land':142 'limit':135 'live':184 'lowpaymentfee.com':30 'maximum':95 'micropay':9,22 'network':79 'no-api-key' 'offer':53 'openapi':169 'page':143,153 'paid':200 'part':42 'pay':49 'pay-per-cal':48 'pay-per-request' 'payload':178 'payment':71,120,128 'per':12,25,50,113 'post':85 'prompt':160 'protocol':72 'provid':56,131 'queri':1,14 'rate':134 'render':155 'request':13,26,86,114,201 'request/response':172 'requir':119 'respons':195 'return':31,88,185 'schema':173 'servic':65 'settl':73 'snx':2,15,37 'snx-token' 'span':57 'spars':146 'spec':170 'specif':81 'success':199 'suit':46 'synthetix':38 'technic':164 'token':39 'token balance lookup' 'unit':101 'unknown':203 'usdc':75,103 'usdc-settlement' 'use':68,107 'util':64 'valid':189 'via':7,20,124 'wallet':3,16,33,159 'wallet-balance-query' 'x':127 'x-payment':126 'x402':8,21,70,91,190 'x402 crypto API' 'x402-payment'","prices":[{"id":"731948df-0939-4589-bbb4-d2fd816045c2","listingId":"e42691cd-bd3c-41b2-8486-76e1139274cf","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/SNX/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":"2026-04-18T19:28:23.343Z"}],"sources":[{"listingId":"e42691cd-bd3c-41b2-8486-76e1139274cf","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/SNX/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:23.343Z","lastSeenAt":"2026-04-23T11:04:02.657Z"}],"details":{"listingId":"e42691cd-bd3c-41b2-8486-76e1139274cf","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/SNX/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -d '{\"address\": \"0xYourWalletAddress\"}'","exampleRequest":{"address":"0x1234567890abcdef1234567890abcdef12345678"},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base, equating to $0.02","source_url":"https://lowpaymentfee.com/api/v1/wallet/SNX/balance"},{"claim":"The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/wallet/SNX/balance"},{"claim":"Provider advertises $0.02 per request, no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) contain only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Checking SNX token balance for a given wallet address","Integrating SNX balance lookups into trading bots or portfolio dashboards","Agent-driven portfolio monitoring that pays per query with no subscription"],"bestFor":["Developers needing on-demand SNX balance queries without API key management","AI agents that can settle micropayments via x402 on Base","Low-volume or sporadic wallet balance checks where pay-per-call is cost-effective"],"notFor":["High-frequency balance polling where a WebSocket or indexed data source would be cheaper","Users who need balances for many tokens in a single call (this endpoint is SNX-specific)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.429Z"},"updatedAt":"2026-04-23T11:04:02.657Z"}}