Plaid

Plaid API enables financial data aggregation connecting bank accounts to applications. Client ID and secret authentication via headers or request body.

Supports Auth (ACH payments), Balance, Transactions, Identity Verification, Income Verification, and Assets products. Plaid Link drop-in module for web, iOS, Android handles authentication. Free tier includes 200 API calls, then pay-as-you-go or subscription pricing. Official SDKs for Node.js, Python, Ruby, Java, Go. Comprehensive sandbox environment. TLS 1.2 required. Postman collection available.

Ideal for fintech apps, lending platforms, payment processing, personal finance management, and identity verification needing secure bank account connectivity.