{"uid":"cap_Zcmwux6dYl3J8z99SzWI7","slug":"ethereum-address-validator-bda27655","name":"Ethereum Address Validator","description":"Validate an Ethereum address. Checks 0x-prefixed 40-hex format and EIP-55 mixed-case checksum to catch single-character typos. Returns checksummed (canonical) form. Pure algorithmic — fast and cheap.","url":"https://api.strale.io/x402/eth-address-validate","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"address":{"type":"string","description":"Ethereum address (e.g. 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045)"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.054","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":"$0.054/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.054","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.054","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_uhYTxzyvwYRSPzYLoKgHB","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.054","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates an Ethereum address for correct 0x-prefixed hex format and EIP-55 mixed-case checksum, returning the canonical checksummed form.","exampleAgentPrompt":"Can you check if this Ethereum address is valid and give me the properly checksummed version: 0xd8da6bf26964af9d7eed9e03e53415d37aa96045?","exampleUseCases":[{"title":"Pre-transfer wallet address check","prompt":"Before I send ETH to 0xd8da6bf26964af9d7eed9e03e53415d37aa96045, can you verify that address is valid and properly checksummed so I don't lose funds to a typo?"},{"title":"User-submitted address sanitization","prompt":"A user just entered 0xABCDEF1234567890abcdef1234567890ABCDEF12 as their withdrawal address — is it a valid Ethereum address and what's its canonical EIP-55 checksummed form?"},{"title":"Smart contract recipient validation","prompt":"I'm about to write 0x0000000000000000000000000000000000000000 into my contract as a recipient — can you tell me if that's a valid non-zero Ethereum address before I deploy?"}],"resultDescription":"Returns a JSON object with: whether the address is valid overall, whether the format (0x + 40 hex chars) is correct, whether the EIP-55 mixed-case checksum is valid (or null if no checksum was present), whether a checksum was present at all, whether it is the zero address, and the normalized (EIP-55 checksummed) address string if valid.","failureModes":["Missing 'address' field in request body returns validation error","Non-hex or improperly prefixed strings return format_valid: false with valid: false","Zero address (0x000...000) returns is_zero_address: true which may be treated as invalid by consuming logic","Addresses with correct format but wrong EIP-55 checksum return checksum_valid: false","Network or server errors may return HTTP 5xx responses"],"whenToPreferThis":"Use this endpoint when you need a fast, cheap, purely algorithmic check of an Ethereum address before any on-chain or off-chain operation — especially to catch single-character typos and EIP-55 checksum errors. Prefer it over on-chain lookups or ENS resolution when you only need format and checksum correctness, not account existence or ENS name resolution.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:54:20.113Z","isFirstParty":false}