Ans: Authentication methods can vary across APIs, commonly involving API keys or OAuth tokens. For the encrypted version of this API, authentication is done using header_secrets and a pass_key, which must be included in the request headers.

Ans: The header_secrets and pass_key will be shared with you separately via email by the ISU team.

Ans: Errors may occur due to invalid input, authentication failures, or server issues. First, verify that your request is properly formatted and includes the correct authentication credentials. If the issue persists, please contact the iServeU support team for assistance.

Ans: iServeU ensures secure data transmission by using AES-256 encryption for both the request and response bodies. Additionally, encrypted headers (header_secrets) and a pass_key are used for authentication. It is essential to implement the encryption and decryption logic exactly as provided by iServeU to maintain security and compatibility.

Ans: The GSTIN Verification API can validate the GSTIN number and fetch registered business details such as the legal name of the business, trade name, registration status, address, and nature of business from the GSTN database.

Ans: Common failure reasons include an invalid or incorrectly formatted GSTIN, deactivated or cancelled GSTIN, or mismatched business details. The API response will provide a failure status, error code, and descriptive message indicating the cause.