{"uid":"cap_40UFyQpyglYN-fZrH4Fv0","slug":"wallet-portfolio-balance-lookup-8e850619","name":"Wallet Portfolio Balance Lookup","description":"One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.","url":"https://klymax402.com/api/wallet-portfolio/api/balance","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"chain":{"enum":["base","ethereum"],"type":"string","description":"Blockchain network (default: base)"},"address":{"type":"string","description":"Wallet address (0x...)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"eth":{},"chain":"example","address":"example"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_CLJEoMqEOeFRNY7YKitAW","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves the native ETH balance and token holdings for a given wallet address on Base or Ethereum","exampleAgentPrompt":"What's the current ETH balance and token holdings for wallet address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e on Base?","exampleUseCases":[{"title":"DeFi portfolio snapshot check","prompt":"Can you pull up the full balance and token holdings for 0xAbCd1234...5678 on Base so I can see what assets are in that wallet right now?"},{"title":"Ethereum wallet audit","prompt":"Check the ETH balance for wallet 0x1234abcd...ef01 on Ethereum and tell me what it's holding."},{"title":"Multi-wallet monitoring bot","prompt":"I want to monitor a wallet — fetch the current balance for 0xDEAD...BEEF on Base so I can track if it changes over time."}],"resultDescription":"Returns a JSON object containing the wallet address, the blockchain chain name, and an ETH balance object with native and token-level holdings for the queried address on the specified network (Base or Ethereum).","failureModes":["Invalid or malformed wallet address returns an error response","Unsupported chain value (not 'base' or 'ethereum') causes a 400-level error","Payment failure via x402 protocol blocks the call if USDC balance is insufficient","Network timeouts or upstream RPC failures may return empty or error responses","Address with no activity may return zero balances"],"whenToPreferThis":"Choose this endpoint when you need a simple, pay-per-call balance lookup for a wallet on Base or Ethereum without managing your own RPC infrastructure or API keys. Ideal for agents that need on-chain wallet data infrequently and want minimal setup overhead. Prefer alternatives if you need historical balance data, ERC-20 token details beyond native ETH, or multi-chain support beyond Base and Ethereum.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:59:35.076Z","isFirstParty":false}