{"uid":"cap_YkkNRQwAddBcxzJUnYvM0","slug":"signal-nodus-evm-balance-lookup-5654119d","name":"Signal Nodus EVM Balance Lookup","description":"Signal Nodus: year-over-year diffs of SEC filing sections, pinned to accession numbers. The diff is the product; raw data is the on-ramp.","url":"https://api.signalnodus.ai/v1/evm/balance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"chain":"base","atBlock":"50113122","balanceEth":0.0421}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_g_8ChDSJVB_Fzrmv_Trpm","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the native token balance of an EVM wallet address at a specific block on a given chain","exampleAgentPrompt":"What was the ETH balance of wallet 0xAbC...123 on Base at block 50113122?","exampleUseCases":[{"title":"Historical portfolio snapshot audit","prompt":"Can you tell me how much ETH the wallet 0xdE0B295669a9FD93d5F28D9Ec85E40f4cb697BAe held on Base at block 50000000?"},{"title":"DeFi liquidation threshold check","prompt":"I need to verify the ETH balance of address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e on Base at block 50113122 — was it above 0.05 ETH at that point?"},{"title":"On-chain wallet reconciliation","prompt":"Pull the native ETH balance for address 0xBE0eB53F46cd790Cd13851d5EFf43D12404d33E8 on Base at block 49900000 so I can reconcile it against our internal records."}],"resultDescription":"A JSON object containing the chain name (e.g. 'base'), the block number queried ('atBlock'), and the wallet's native token balance in ETH ('balanceEth') at that point in time.","failureModes":["Invalid or malformed EVM address returns an error response","Block number not yet mined or too far in the future returns an error","Unsupported chain identifier results in a 400-level error","Network congestion or node unavailability may cause timeouts","Payment failure via x402 protocol prevents access to result"],"whenToPreferThis":"Use this endpoint when you need a point-in-time native token balance for an EVM wallet pinned to a specific block number — particularly on Base. Prefer this over generic blockchain explorers when you need machine-readable JSON output suitable for agent pipelines, or when you need sub-cent micropayment access without API key registration.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T12:34:08.926Z","isFirstParty":false,"canonicalSlug":"signal-nodus-evm-balance-lookup-5654119d"}