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EVM Address Check
x402
EVM Address Check is a paid API for AI agents from conclavex402p04.pythonanywhere.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-14).
Validates and checksums an Ethereum or EVM-compatible address, returning EIP-55 checksum status and lowercase form
Price / call$0.005
Success—
StatusUnknown
How this service works
EVM address checksum and validation — check an Ethereum/Base address format before sending funds.
Output
Returns a JSON object with three fields: 'lowercase' (the address normalized to lowercase hex), 'valid_format' (boolean indicating whether the address matches the expected 0x + 40 hex chars format), and 'eip55_verifiable' (boolean indicating whether the address passes EIP-55 mixed-case checksum verification).
Example use cases
Pre-transfer address safety check
“I'm about to send 500 USDC to 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B — can you verify that address is properly formatted and EIP-55 checksummed before I proceed?”
User input validation in wallet app
“A user just entered 0x742d35Cc6634C0532925a3b844Bc454e4438f44e as their withdrawal address — is it a valid EVM address format and does it pass the checksum?”
Bulk address audit in agent pipeline
“We collected a list of Base wallet addresses from our users and I need to verify each one — start with 0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe and tell me if it's valid and EIP-55 verifiable.”
Technical details
Endpoint
POSThttps://conclavex402p04.pythonanywhere.com/u/address-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, lightweight on-the-fly check of an Ethereum, Base, or any EVM-compatible wallet address before executing a transaction or storing the address. Prefer it over manual regex checks when you also need EIP-55 checksum validation in addition to basic format verification. Particularly valuable in agent pipelines that handle user-supplied wallet addresses where input errors could result in lost funds.
Side effects
- Missing or malformed address input returns a validation error
- Non-hex or non-0x-prefixed strings may return valid_format: false
- Addresses with correct length but invalid hex characters will fail format check
- Network or server errors on pythonanywhere.com may return 5xx responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"lowercase": "0x2f2e1f54109b2525137eeda4a892600ee956d42a",
"valid_format": true,
"eip55_verifiable": false
}
}Tags
x402
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