{"uid":"cap_zx6E7hlmE4ZFUh5fAeYen","slug":"ambolt-base-wallet-balances-e4efe686","name":"Ambolt Base Wallet Balances","description":"Pay-per-call data tools for developers and AI agents: company registers, documents, tenders, rates and on-chain facts as MCP tools, x402 endpoints and Apify Actors.","url":"https://api.ambolt.dev/v1/base-wallet-balances?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"const":"http"},"method":{"enum":["GET","POST"]},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Wallet address on Base."},"extraTokens":{"type":"string","description":"Additional ERC-20 contract addresses to check (up to 20)."}},"additionalProperties":false}}}}},"responseSchema":{"type":"json","example":{"eth":{"eth":"371320.35374511097880356","wei":"371320353745110978803560"},"readAt":"2026-10-02T21:35:41.048Z","source":"Source: Base mainnet RPC (live chain state). Not advice.","tokens":[],"address":"0x4200000000000000000000000000000000000016","chainId":8453,"network":"base","unreadable":[],"checkedTokens":7}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_xgbKyZf7OaCuAsFtPbbHD","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches live ETH and ERC-20 token balances for a wallet address on the Base blockchain (chain ID 8453)","exampleAgentPrompt":"What's the current ETH balance and token holdings for wallet 0x4200000000000000000000000000000000000016 on Base mainnet? Also check balances for the USDC contract at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA.","exampleUseCases":[{"title":"DeFi portfolio balance check","prompt":"Can you look up the live ETH and token balances for my Base wallet 0xAbC1234567890abcdef1234567890abcdef123456? I also want to check my USDC at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA and WETH at 0x4200000000000000000000000000000000000006."},{"title":"Wallet audit before a transaction","prompt":"Before I send funds, can you check the current ETH balance on Base for the address 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD and tell me exactly how much ETH is there in both ETH and wei?"},{"title":"Monitor agent treasury on Base","prompt":"Check what ETH and token balances are held right now in our agent's treasury wallet 0x000000000000000000000000000000000000dEaD on Base mainnet so I know if it needs topping up."}],"resultDescription":"Returns the wallet's ETH balance in both ETH and wei units, a list of ERC-20 token balances for standard tokens plus any extras requested, the chain ID (8453), network name ('base'), timestamp of the read, and lists of any tokens that could not be read. Data reflects live Base mainnet chain state.","failureModes":["Invalid address format (not matching 0x + 40 hex chars) — request rejected by schema validation","Extra token address not a valid ERC-20 contract — listed in 'unreadable' array rather than hard failure","More than 20 extra token addresses provided — schema rejects the request","RPC node unavailability — upstream Base RPC error causing failed or stale response","Address with zero activity returns zero balances (valid but potentially misleading)"],"whenToPreferThis":"Choose this endpoint when you need live, real-time on-chain ETH and token balances specifically on the Base L2 network (chain ID 8453). It supports checking up to 20 additional ERC-20 contracts in a single call, making it efficient for portfolio-style lookups. Prefer this over generic blockchain explorers when you need machine-readable, structured balance data at low cost ($0.005 USDC per call) and need the result immediately without scraping or rate-limit concerns.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:44:17.973Z","isFirstParty":false,"canonicalSlug":"ambolt-base-wallet-balances-e4efe686"}