How to Validate Phone Numbers, Emails, and IBANs in One API Call

Every fintech or e-commerce app needs to validate user data at registration: phone numbers, email addresses, and often bank details like IBANs. The traditional approach means subscribing to three different APIs, managing three API keys, and writing three different integration patterns. What if you could validate all of them with a single API key and a unified response format? This tutorial shows you how to build a complete user data validation layer using DataForge — a single API that handles phone numbers, emails, IBANs, credit cards, VAT numbers, postal codes, dates, passwords, and crypto wallets. Prerequisites Python 3.8+ A free RapidAPI account DataForge API subscription (free tier available): Subscribe here Step 1: Install Dependencies pip install httpx pydantic We'll use httpx for async HTTP requests and pydantic for response models. Step 2: Create Your Validation Client # validator.py import httpx from pydantic import BaseModel from typing import Optional DATAFORGE_BASE = " http