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EVM Address EIP-55 Checksum Validator
x402
EVM Address EIP-55 Checksum Validator is a paid API for AI agents from agent-data-tools.revmesh2074.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-26).
Validates an EVM address and returns its EIP-55 checksummed form, classifying the input as lowercase, uppercase, correctly checksummed, or wrong-checksum mixed case.
Price / call$0.01
Success—
StatusUnknown
How this service works
Address checksum (EIP-55). Validate an EVM address and return its EIP-55 checksummed form, saying whether the input was all lower case, all upper case, correctly checksummed or mixed case with a wrong checksum (a likely typo). Works for every EVM chain. Use before sending funds or storing an address; for whether it is a contract use <chain>_is_contract.
Output
Returns the original input address, a boolean validity flag, a classification of the input case (all-lowercase, all-uppercase, correctly-checksummed, or mixed-case with wrong checksum), the EIP-55 checksummed form of the address, and a checksumMatches flag indicating whether the input already had the correct checksum.
Example use cases
Pre-transfer address safety check
“I'm about to send 2 ETH to 0xab5801a7d398351b8be11c439e05c5b3259aec9b — can you checksum and validate that address for me so I know it's safe and hasn't been mistyped?”
Address normalization before database storage
“I need to store this EVM address in our database in a consistent, checksummed format: 0XD8DA6BF26964AF9D7EED9E03E53415D37AA96045 — can you normalize it to EIP-55 mixed case?”
Detect likely typo in pasted address
“Someone gave me this wallet address: 0xd8Da6BF26964aF9d7eEd9e03E53415D37aA96045 — can you check if the checksum is correct or if it looks like a typo?”
Technical details
Endpoint
GEThttps://agent-data-tools.revmesh2074.workers.dev/evm/checksum?utm_source=zero.xyzWhen to prefer
Use this endpoint any time you need to validate or normalize an EVM-compatible address before sending funds, storing it, or displaying it. It works across all EVM chains (Ethereum, Base, Arbitrum, Optimism, Polygon, etc.) and clearly distinguishes between safe inputs (all-lowercase, all-uppercase, correct checksum) and dangerous ones (mixed-case with wrong checksum, indicating a likely copy-paste error or address poisoning attempt). For checking whether an address is a smart contract rather than an EOA, use the chain-specific is_contract endpoint instead.
Side effects
- Address shorter or longer than 40 hex characters after 0x prefix returns invalid
- Non-hex characters in address body return invalid
- Missing 0x prefix may cause a validation error
- Network or worker timeout returns an HTTP error with no result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"input": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
"valid": true,
"inputCase": "lower",
"checksummed": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"checksumMatches": null
}
}Tags
x402
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