{"id":"a196cd72-f1ba-4038-98aa-2df6649f1e93","shortId":"mDdtbN","kind":"x402","title":"Retrieve wallet token balances on Base via x402-paid POST endpoint.","tagline":"Retrieve wallet token balances on Base via x402-paid POST endpoint.","description":"This x402-gated endpoint, operated by Erudite Intelligence LLC, returns token balance data for a given wallet or contract address on the Base network. You send a POST request with a JSON body containing an `address` field (an Ethereum-style wallet or contract address), and the endpoint returns balance information as JSON.\n\nPayment is required per-call via the x402 protocol. The endpoint accepts two payment options: USDC on Base (eip155:8453) at 0.01 USDC per request, or USDT on Tron at 0.01 USDT per request. The x402 challenge is facilitated through Coinbase CDP (for Base) or directly on Tron. The provider describes the service category as \"Crypto data intelligence.\"\n\nThe response schema is minimal — the example output shows `{\"success\": true, \"data\": {}}` — so the exact structure of the returned balance data is not fully documented. No OpenAPI spec or dedicated documentation page is available (the /docs path returns a 404). The endpoint is live and returns a valid x402 v2 challenge. The facilitator bridge (bridge.eruditepay.com) supports 20 blockchains for payment settlement and is registered as a FinCEN MSB.","tags":[],"capabilities":["wallet-balance-lookup","base-network","x402-payment","usdc-payment","usdt-tron-payment","crypto-data","json-api"],"categories":["crypto","blockchain-data"],"synonyms":["wallet balance API","token balance check","Base chain wallet balances","ERC-20 balance lookup","crypto wallet data","on-chain balance query","Erudite wallet balances"],"warnings":["No dedicated documentation available — /docs, /api, /pricing, and /README all return 404.","The example output shows an empty data object; the actual response structure for balance data is undocumented.","Only the Bazaar extension schema is available; no OpenAPI or detailed field descriptions exist."],"endpointUrl":"https://bridge.eruditepay.com/v1/base/wallet/balances","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x24c5da6267AEbEBfCBf7B325753C5B2538A5B09B","amount":"5000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t","extra":{"name":"TronTransferAuthorization","version":"1","wrapper":"THGkLBrLY1G5VovZjjK1jP9upyxRdMNL3b"},"payTo":"TSevuRZFjpckeMSSDhQFoiAkPCkckuE5TP","amount":"5000","scheme":"exact","network":"tron:728126428","maxTimeoutSeconds":300}]},"qualityScore":"0.450","qualityRationale":"The endpoint is live and returns a valid x402 v2 challenge with clear pricing and a basic schema. However, documentation is absent (/docs returns 404), the output example is a stub with an empty data object, and there is no OpenAPI spec. The actual structure of balance data returned is 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'0.01':101,110 '20':194 '404':177 '8453':99 'Base chain wallet balances' 'ERC-20 balance lookup' 'Erudite wallet balances' 'accept':91 'address':45,61,70 'avail':171 'balanc':4,16,37,75,157 'base':6,18,48,97,123 'base-network' 'blockchain':195 'bodi':58 'bridg':191 'bridge.eruditepay.com':192 'call':84 'categori':133 'cdp':121 'challeng':116,188 'coinbas':120 'contain':59 'contract':44,69 'crypto':135 'crypto wallet data' 'crypto-data' 'data':38,136,149,158 'dedic':167 'describ':130 'direct':125 'document':162,168 'eip155':98 'endpoint':12,24,29,73,90,179 'erudit':32 'ethereum':65 'ethereum-styl':64 'exact':152 'exampl':144 'facilit':118,190 'field':62 'fincen':204 'fulli':161 'gate':28 'given':41 'inform':76 'intellig':33,137 'json':57,78 'json-api' 'live':181 'llc':34 'minim':142 'msb':205 'network':49 'on-chain balance query' 'openapi':164 'oper':30 'option':94 'output':145 'page':169 'paid':10,22 'path':174 'payment':79,93,197 'per':83,103,112 'per-cal':82 'post':11,23,53 'protocol':88 'provid':129 'regist':201 'request':54,104,113 'requir':81 'respons':139 'retriev':1,13 'return':35,74,156,175,183 'schema':140 'send':51 'servic':132 'settlement':198 'show':146 'spec':165 'structur':153 'style':66 'success':147 'support':193 'token':3,15,36 'token balance check' 'tron':108,127 'true':148 'two':92 'usdc':95,102 'usdc-payment' 'usdt':106,111 'usdt-tron-payment' 'v2':187 'valid':185 'via':7,19,85 'wallet':2,14,42,67 'wallet balance API' 'wallet-balance-lookup' 'x402':9,21,27,87,115,186 'x402-gated':26 'x402-paid':8,20 'x402-payment'","prices":[{"id":"11a93cff-cf21-4dc9-8ea1-16f867a4226d","listingId":"a196cd72-f1ba-4038-98aa-2df6649f1e93","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0x24c5da6267AEbEBfCBf7B325753C5B2538A5B09B","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x24c5da6267AEbEBfCBf7B325753C5B2538A5B09B","amount":"5000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t","extra":{"name":"TronTransferAuthorization","version":"1","wrapper":"THGkLBrLY1G5VovZjjK1jP9upyxRdMNL3b"},"payTo":"TSevuRZFjpckeMSSDhQFoiAkPCkckuE5TP","amount":"5000","scheme":"exact","network":"tron:728126428","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:36.921Z"}],"sources":[{"listingId":"a196cd72-f1ba-4038-98aa-2df6649f1e93","source":"x402_bazaar","sourceId":"https://bridge.eruditepay.com/v1/base/wallet/balances","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:36.921Z","lastSeenAt":"2026-04-22T07:02:22.766Z"}],"details":{"listingId":"a196cd72-f1ba-4038-98aa-2df6649f1e93","quickStartSnippet":"curl -X POST https://bridge.eruditepay.com/v1/base/wallet/balances \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_header>\" \\\n  -d '{\"address\": \"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\"}'","exampleRequest":{"address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"},"exampleResponse":{"data":{},"success":true},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns x402 v2 challenge with USDC on Base at amount 10000 (0.01 USDC) and USDT on Tron at amount 10000 (0.01 USDT)","source_url":"https://bridge.eruditepay.com/v1/base/wallet/balances"},{"claim":"Provider is Erudite Intelligence LLC, FinCEN MSB registered with BSA ID 31000324258137","source_url":"https://bridge.eruditepay.com"},{"claim":"The facilitator bridge supports 20 blockchains and charges 0.5% per settlement","source_url":"https://bridge.eruditepay.com"},{"claim":"x402 facilitator for Base payments is Coinbase CDP at https://api.cdp.coinbase.com/platform/v2/x402","source_url":"https://bridge.eruditepay.com/v1/base/wallet/balances"}],"useCases":["Querying token balances for a wallet address on Base before executing a trade or transfer","Building portfolio dashboards that display real-time wallet holdings","Automated agents checking wallet balances as part of DeFi workflows","Verifying wallet funding status before initiating on-chain transactions"],"bestFor":["AI agents needing on-demand wallet balance data with pay-per-call pricing","Developers building crypto portfolio tools on Base","Automated workflows that need to verify wallet balances without running a full node"],"notFor":["Historical balance queries or time-series balance data (no evidence of support)","Querying balances on chains other than Base (this specific endpoint is Base-scoped)","Free or high-volume bulk balance lookups (each call costs 0.01 USD)"],"kindDetails":{},"updatedAt":"2026-04-22T02:02:25.386Z"}}