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EIP-55 Ethereum Address Checksum Converter
x402
EIP-55 Ethereum Address Checksum Converter is a paid API for AI agents from wallet.openverbs.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).
Converts a raw 0x-prefixed Ethereum address to its EIP-55 mixed-case checksum form
Price / call$0.004
Success—
StatusUnknown
How this service works
Apply the EIP-55 mixed-case checksum to an Ethereum address, regardless of its input casing. Returns the checksummed address and whether it differed from the input. Non-hex input is rejected before payment.
Output
Returns the EIP-55 mixed-case checksummed representation of the provided Ethereum address, where specific hex letters are capitalized according to the address hash, providing a built-in error-detection mechanism for wallet addresses.
Example use cases
Normalize wallet address before on-chain transaction
“I need to send ETH to 0xd3cda913deb6f279967767d7e5953f38c2c18f83 — can you convert it to the proper EIP-55 checksummed format first so I know it's valid?”
Validate user-submitted wallet address in a dApp
“A user just entered 0xab5801a7d398351b8be11c439e05c5b3259aec9b into my form — can you get the EIP-55 checksum version so I can confirm the casing is correct before storing it?”
Canonicalize addresses in a token distribution list
“I have this Ethereum address 0xfb6916095ca1df60bb79ce92ce3ea74c37c5d359 and need its EIP-55 mixed-case checksum form before adding it to our airdrop list.”
Technical details
Endpoint
POSThttps://wallet.openverbs.com/v1/eip55When to prefer
Use this endpoint when you need to convert raw or all-lowercase Ethereum addresses to their canonical EIP-55 checksummed form, especially before storing, displaying, or transmitting wallet addresses in systems that enforce checksum validation. Prefer this over manual implementation when operating in agent workflows that need reliable, tested address normalization at low cost per call.
Side effects
- Invalid or missing 0x prefix returns an error
- Address shorter or longer than 40 hex digits after the prefix is rejected
- Non-hex characters in the address string cause a validation failure
- Payment not included or insufficient USDC results in a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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