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EVM Address Checksum & Validation Tool
x402
EVM Address Checksum & Validation Tool is a paid API for AI agents from chain-tools.use.x402atlas.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Normalizes an Ethereum-compatible address to its EIP-55 mixed-case checksum form and validates whether a given address passes checksum verification, entirely offline.
Price / call$0.005
Success—
StatusUnknown
How this service works
EVM address checksum and validation tool — normalize one Ethereum-compatible address and validate mixed-case EIP-55 input offline.
Output
Returns the EIP-55 checksummed version of the provided Ethereum address and a boolean indicating whether the original input passed checksum validation, computed fully offline without any on-chain lookup.
Example use cases
Validate user-submitted wallet address
“A user just submitted the wallet address 0xab5801a7d398351b8be11c439e05c5b3259aec9b for a payout — can you verify it passes EIP-55 checksum validation before we send funds?”
Normalize raw lowercase address for contract call
“I have a raw lowercase EVM address 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae that I need to convert to proper EIP-55 checksummed format before encoding it into a contract call.”
Audit addresses in a batch config file
“I'm reviewing a config file and found this address 0x5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed — can you confirm whether its mixed-case checksum is correct or if someone corrupted the casing?”
Technical details
Endpoint
POSThttps://chain-tools.use.x402atlas.com/evm/address-checksumWhen to prefer
Use this endpoint when you need to normalize or validate a single Ethereum-compatible address to EIP-55 format offline without touching a node or RPC. Prefer this over on-chain calls or web3 libraries when you want a lightweight, deterministic, stateless checksum check that works for any EVM-compatible chain address.
Side effects
- Invalid hex string input (non-hex characters or wrong length) — returns validation error
- Address missing 0x prefix — may return format error
- Null or empty address input — returns bad request error
- Address with correct length but wrong checksum — returns checksummed version alongside a validation failure flag
Tags
x402
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