{"id":"5ef96a85-c8da-40e9-bab5-98309ca3a607","shortId":"35KjcE","kind":"x402","title":"Query IMX wallet balance via x402 micropayment on Base for $0.02 per request.","tagline":"Query IMX wallet balance via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns wallet balance information for IMX (Immutable X) tokens. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all gated behind the x402 payment protocol on the Base network.\n\nThe specific endpoint `/api/v1/wallet/IMX/balance` accepts POST requests and is priced at 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). Payment is settled on-chain via the x402 \"exact\" scheme, meaning each request requires a one-time micropayment included in the X-PAYMENT header. No API keys, subscriptions, or rate limits are advertised — access is instant once payment is attached.\n\nDocumentation on the site is extremely thin: the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional 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 response format and accepted request parameters are unknown.","tags":[],"capabilities":["wallet-balance","imx-token","x402-payment","usdc-micropayment","base-network","pay-per-request","crypto-data"],"categories":["crypto","finance"],"synonyms":["IMX balance","Immutable X wallet balance","token balance API","crypto wallet balance","IMX balance check","Web3 wallet query"],"warnings":["No API documentation available — docs, pricing, API, and README pages all show only a wallet-connect prompt","Request body schema is unknown; the example_request_json is speculative","Response format is completely undocumented; example_response_json is null","The platform lists many endpoints but none appear to have public documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/IMX/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/IMX/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 with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no usage examples, and the docs pages are empty stubs. The request body and response format are entirely 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'0.02':11,24,99 '000':88 '0x8335':93 '20':87 '2913':94 '402':200 '6':104 'IMX balance' 'IMX balance check' 'Immutable X wallet balance' 'Web3 wallet query' 'accept':80,208 'access':142 'actual':204 'addit':172 'advertis':141 'ai/ml':59 'analyt':58 'api':54,134,159 'attach':148 'avail':187 'balanc':4,17,33 'base':9,22,74,89,96 'base-network' 'behind':67 'broader':45 'call':53,101 'chain':111 'challeng':201 'confirm':195 'connect':167 'crawl':190 'crypto wallet balance' 'crypto-data' 'data':57 'decim':105 'detail':174 'doc':157 'document':149 'dozen':48 'endpoint':28,55,78,193 'equal':98 'exact':115 'exampl':186 'extrem':154 'finance/web3':61 'format':206 'gate':66 'header':132 'immut':37 'imx':2,15,36 'imx-token' 'includ':126 'infer':60 'inform':34 'infrastructur':63 'instant':144 'key':135 'limit':139 'live':196 'lowpaymentfee.com':30 'materi':191 'mean':117 'micropay':7,20,125 'network':75 'offer':47 'on-chain':109 'one':123 'one-tim':122 'openapi':178 'page':162 'paramet':210 'part':42 'pay':51 'pay-per-cal':50 'pay-per-request' 'payment':70,106,131,146 'per':12,25,52,100 'platform':46 'post':81 'price':85,158 'prompt':169 'proper':199 'protocol':71 'queri':1,14 'rate':138 'readm':161 'render':164 'request':13,26,82,119,209 'request/response':181 'requir':120 'respons':205 'return':31,197 'schema':182 'scheme':116 'settl':108 'site':152 'span':56 'spec':179 'specif':77 'subscript':136 'technic':173 'thin':155 'time':124 'token':39 'token balance API' 'unit':90 'unknown':212 'usag':185 'usdc':92,102 'usdc-micropayment' 'use':103 'util':64 'via':5,18,112 'wallet':3,16,32,168 'wallet-balance' 'x':38,130 'x-payment':129 'x402':6,19,69,114 'x402-payment'","prices":[{"id":"9a39c936-46bf-4457-80c0-feba179b8b5c","listingId":"5ef96a85-c8da-40e9-bab5-98309ca3a607","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/IMX/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":"2026-04-18T19:28:17.233Z"}],"sources":[{"listingId":"5ef96a85-c8da-40e9-bab5-98309ca3a607","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/IMX/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:17.233Z","lastSeenAt":"2026-04-23T12:32:03.108Z"}],"details":{"listingId":"5ef96a85-c8da-40e9-bab5-98309ca3a607","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/IMX/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":"Endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (USDC), maxAmountRequired 20000","source_url":"https://lowpaymentfee.com/api/v1/wallet/IMX/balance"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages render only a Connect wallet prompt with no technical content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Checking IMX token balance for a given wallet address","Integrating real-time IMX balance data into portfolio trackers","Automated agents querying wallet balances without API key management","On-chain payment-gated balance lookups for trustless integrations"],"bestFor":["Agents or apps needing quick, keyless IMX balance lookups","Developers who prefer pay-per-call over subscription billing","Web3 projects already operating on Base network"],"notFor":["Bulk or high-frequency balance polling where $0.02/call adds up quickly","Users needing detailed transaction history or multi-token portfolio data","Anyone requiring comprehensive API documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.668Z"},"updatedAt":"2026-04-23T12:32:03.108Z"}}