{"id":"ae3751a7-f705-4d5e-a7c4-ba70d94cbab7","shortId":"FUVuus","kind":"x402","title":"Query GMX wallet balance on-chain via x402 micropayment — $0.02 per request on Base.","tagline":"Query GMX wallet balance on-chain via x402 micropayment — $0.02 per request on Base.","description":"This endpoint at lowpaymentfee.com returns the wallet balance for the GMX token. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, all settled via the x402 protocol on the Base network using USDC. The specific endpoint path `/api/v1/wallet/GMX/balance` suggests it retrieves the current balance of a GMX token wallet, though the exact request and response schemas are not documented.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled on-chain on Base using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds. No API keys or rate limits are required — access is gated purely by the x402 payment header.\n\nThe provider's landing page lists many other endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories, all priced at $0.02 per request. However, documentation pages (docs, pricing, README) all render only a \"Connect wallet\" prompt with no further technical detail, so the exact request body format and response schema for this endpoint remain unknown.","tags":[],"capabilities":["wallet-balance-query","gmx-token","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key"],"categories":["crypto","finance"],"synonyms":["GMX balance","GMX wallet","token balance API","crypto balance check","GMX holdings","wallet balance lookup","DeFi balance"],"warnings":["No documentation available — docs, pricing, and README pages all show only 'Connect wallet' with no content.","Request body schema is unknown; the example request is speculative.","Response schema is completely undocumented.","The provider lists many endpoints across diverse categories (AI, analytics, finance, utilities) all at the same price, which may indicate a generic or placeholder service."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wallet/GMX/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/GMX/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 pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example responses, and the docs/pricing/README pages are all empty. Request and response formats are entirely 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'0.02':11,26,132,186 '000':127 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':143 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':120 '20':126 '300':148 '6':135 'DeFi balance' 'GMX balance' 'GMX holdings' 'GMX wallet' 'accept':106 'access':158 'across':176 'address':142 'ai/ml':178 'amount':124 'api':55,151 'balanc':4,19,38,81 'base':15,30,67,116,128 'base-network' 'bodi':211 'broader':48 'call':54 'categori':182 'chain':7,22,114 'challeng':99 'confirm':100 'connect':199 'contract':119 'crypto balance check' 'current':80 'data/analytics':177 'decim':136 'detail':206 'doc':192 'document':96,190 'endpoint':32,73,102,175,218 'equal':131 'exact':89,209 'finance/web3':179 'format':212 'gate':160 'gmx':2,17,41,84 'gmx-token' 'header':166 'howev':189 'infrastructur':181 'key':152 'land':170 'limit':155 'list':172 'live':104 'lowpaymentfee.com':34,58 'mani':173 'maximum':123 'micropay':10,25 'network':68 'no-api-key' 'offer':56 'on-chain':5,20,112 'page':171,191 'part':45 'path':74 'pay':52 'pay-per-cal':51 'pay-per-call' 'payment':109,138,165 'per':12,27,53,187 'post':107 'price':184,193 'prompt':201 'protocol':64 'provid':168 'pure':161 'queri':1,16 'rate':154 'readm':194 'remain':219 'render':196 'request':13,28,90,108,188,210 'requir':157 'respons':92,214 'retriev':78 'return':35 'schema':93,215 'second':149 'sent':140 'settl':60,111 'specif':72 'suggest':76 'suit':49 'technic':205 'though':87 'timeout':146 'token':42,85 'token balance API' 'unit':129 'unknown':220 'usdc':70,118,133 'usdc-settlement' 'use':69,117,134 'via':8,23,61 'wallet':3,18,37,86,200 'wallet balance lookup' 'wallet-balance-query' 'x402':9,24,63,98,164 'x402-payment'","prices":[{"id":"f880d042-ac8b-4b35-8ba8-6badfe2225c6","listingId":"ae3751a7-f705-4d5e-a7c4-ba70d94cbab7","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/GMX/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":"2026-04-18T19:28:25.183Z"}],"sources":[{"listingId":"ae3751a7-f705-4d5e-a7c4-ba70d94cbab7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wallet/GMX/balance","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:25.183Z","lastSeenAt":"2026-04-23T11:04:02.735Z"}],"details":{"listingId":"ae3751a7-f705-4d5e-a7c4-ba70d94cbab7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wallet/GMX/balance \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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 402 with x402 challenge confirming it is live on Base network using USDC","source_url":"https://lowpaymentfee.com/api/v1/wallet/GMX/balance"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per request","source_url":"https://lowpaymentfee.com/api/v1/wallet/GMX/balance"},{"claim":"All APIs priced at $0.02/request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages render only 'Connect wallet' with no technical content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Checking GMX token balance for a wallet address programmatically","Integrating GMX balance data into portfolio tracking dashboards","Automated monitoring of GMX holdings for trading bots"],"bestFor":["Agents needing on-demand GMX wallet balance without API key management","Micropayment-gated crypto data queries on Base","Quick one-off balance lookups without subscription commitments"],"notFor":["High-frequency polling where per-request costs accumulate quickly","Users who need detailed transaction history or multi-token balance in a single call","Anyone without a Base-network USDC wallet for x402 payments"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:32.307Z"},"updatedAt":"2026-04-23T11:04:02.735Z"}}