{"uid":"cap_92AnQ6o4stTbf96pvo5In","slug":"evm-address-validator-contract-address-calculator-abcf8a74","name":"EVM Address Validator & Contract Address Calculator","description":"Exact EVM address, calldata, Uniswap V2/V3 and impermanent-loss math. Pay per call in USDC on Base via x402.","url":"https://golf-evm-math.x402-evm-math.workers.dev/evm/address?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":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"valid":true,"checksum":"0x52908400098527886E0F7030069857D2E4169EE7"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ZuaM-OsTvLpolsdFnTH9u","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","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, returns its EIP-55 checksum form, and optionally computes CREATE or CREATE2 derived contract addresses.","exampleAgentPrompt":"Can you validate the Ethereum address 0x52908400098527886e0f7030069857d2e4169ee7 and give me its proper EIP-55 checksum form?","exampleUseCases":[{"title":"Checksum wallet address before transfer","prompt":"I have this Ethereum address — 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae — can you validate it and give me the properly checksummed version so I can safely use it in my app?"},{"title":"Predict CREATE2 contract deployment address","prompt":"What address will my contract be deployed to if the deployer is 0x6C9FC64A53c1b71FB3f9Af64d1ae3A4931a5f4E9, salt is 0xabcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890, and init code hash is 0x9a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b?"},{"title":"Predict CREATE contract address from nonce","prompt":"If my deployer wallet is 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B and it's at nonce 5, what Ethereum address will the next deployed contract land on?"}],"resultDescription":"Returns a JSON object with a 'valid' boolean indicating if the address is well-formed, a 'checksum' string containing the EIP-55 checksummed address, and optionally the derived contract address for CREATE or CREATE2 deployments.","failureModes":["Invalid or malformed address input returns valid: false","Missing required address query parameter returns an error","Incomplete CREATE2 parameters (e.g. missing salt or init_code_hash) may return an error or fall back to simpler validation","Payment not provided or insufficient USDC results in HTTP 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need deterministic, exact EVM address validation and EIP-55 checksumming without setting up a local Web3 library, or when you need to predict contract deployment addresses (CREATE/CREATE2) on-the-fly in an agent pipeline. Prefer this over general-purpose RPC calls when you want a simple pay-per-call REST API that handles the math server-side.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T06:40:31.226Z","isFirstParty":false,"canonicalSlug":"evm-address-validator-contract-address-calculator-abcf8a74"}