---
title: "Ethereum Address Validation (x402)"
method: POST
path: "/x402/v2/eth-address-validate"
tags: ["x402"]
---

# Ethereum Address Validation (x402)

`POST /x402/v2/eth-address-validate`

## Request

- Base URL: `https://api.strale.io`
- URL: `https://api.strale.io/x402/v2/eth-address-validate`
- Auth: none required

Validate an Ethereum address. Checks 0x-prefixed 40-hex format and EIP-55 mixed-case checksum to catch single-character typos. Returns checksummed (canonical) form. Pure algorithmic — fast and cheap.

## Request body

- object
  - `address` string, required: Ethereum address (e.g. 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045)

## Response `200`

Success

- object
  - `input` string
  - `valid` boolean
  - `normalized` string, nullable
  - `format_valid` boolean
  - `checksum_valid` boolean, nullable
  - `is_zero_address` boolean
  - `checksum_present` boolean

## Other responses

- `402`: Payment required (x402 — pay with USDC on Base)

---

[API](https://skmtc.dev/strale/apis/strale-api-2.md) · [All operations](https://skmtc.dev/strale/apis/strale-api-2/llms.txt) · [OpenAPI document](https://skmtc.dev/strale/apis/strale-api-2/revisions/a5293878cfc6?raw)