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Web3 Tools – EVM Address EIP-55 Checksum Validator
x402
Web3 Tools – EVM Address EIP-55 Checksum Validator is a paid API for AI agents from web3-tools.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).
Validates an EVM address against its EIP-55 checksum and returns the correctly checksummed form along with a verdict.
Price / call$0.02
Success—
StatusUnknown
How this service works
Check an EVM address (Ethereum, Base, Polygon...) against its EIP-55 checksum and return the correctly checksummed form.
Output
Returns a JSON object containing: the original input address, the correctly checksummed EIP-55 form, the lowercase form, a boolean checksumVerified flag, a verdict string, a summary, reasons array explaining the result, whether the address is a known special address, whether it is the zero address, a timestamp (asOf), degraded flag, and a disclaimer.
Example use cases
Pre-transfer address sanity check
“Before I send ETH to 0x5AAEB6053F3E94C9B9A09F33669435E7EF1BEAED, can you verify that address is correctly checksummed and give me the canonical EIP-55 form?”
Smart contract input normalization
“I need to pass an Ethereum address to a contract call — can you validate 0xfb6916095ca1df60bb79ce92ce3ea74c37c5d359 and return the properly checksummed version?”
Wallet address format debugging
“I think the address 0XD8DA6BF26964AF9D7EED9E03E53415D37AA96045 has a casing issue — can you run an EIP-55 checksum check and tell me if it's valid or what the correct form should be?”
Technical details
Endpoint
GEThttps://web3-tools.x402tookit.com/evm-address?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify or normalize an EVM-compatible address (Ethereum, Base, Polygon, etc.) to its EIP-55 checksummed form before using it in a transaction, contract call, or display context. Prefer this over manual regex checks when you also need metadata like zero-address detection or known-special flags.
Side effects
- Missing or malformed address query parameter (not 0x + 40 hex chars) returns an error
- Non-hex characters in address body cause validation failure
- Address shorter or longer than 42 characters rejected
- Payment not included or insufficient USDC causes 402 response
- Network timeout or service degradation returns degraded flag set to true
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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