---
title: "Tax ID Validate (x402)"
method: GET
path: "/x402/v2/tax-id-validate"
tags: ["x402"]
---

# Tax ID Validate (x402)

`GET /x402/v2/tax-id-validate`

## Request

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

Validate tax identification number (TIN) formats for 40+ countries. Checks format rules and checksum algorithms where applicable. Does not verify with tax authorities.

## Query parameters

- `tax_id` string, required: Tax identification number (with or without country prefix)
- `country_code` string: ISO 2-letter country code (auto-detected from prefix if omitted)

## Response `200`

Success

- object
  - `valid` boolean
  - `normalized` string
  - `format_name` string
  - `country_code` string
  - `checksum_valid` 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)