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Best Practices For Securing Web APIs

Web APIs (Application Programming Interfaces) are essential components of modern software applications. They enable different program systems to interact with each other and exchange data. However, they can also pose a significant security risk if they are not secure properly. In this blog post, we will discuss the best practices for securing web APIs.

Ways to secure web APIs

Use HTTPS for Transport Layer Security (TLS)

Transport Layer Security (TLS) is a cryptographic protocol that provides secure communication over the internet. It encrypts all the data exchanged between the client and the server, making it unreadable by anyone who intercepts it. It is essential to use HTTPS instead of HTTP for all web API calls to ensure that the data transmitted is secure.

Use Authentication and Authorization

Authentication is the process of verifying the identity of a user or client system before granting access to resources. Authorization is the process of determining what actions a user or client system is allow to perform after they have been authenticate. It is essential to use both authentication and authorization for all web API calls to ensure that only authorized users or client systems can access the resources.

Use Strong Passwords and Two-Factor Authentication (2FA)

When using passwords for authentication, it is vital to use strong passwords that are not easy to guess. Passwords should contain a combination of upper case and lower case letters, numbers, and symbols. Two-Factor Authentication (2FA) can also be use to add an extra layer of security. 2FA requires the user to provide two forms of identification before giving access to the system. Passwords are important as most of the api providers have an admin console which holds the master key. If your password is not strong this will result in your API account and subsequently keys getting expose.

Implement Rate Limiting

Rate limiting is a technique use to prevent denial of service (DoS) attacks by limiting the number of requests that can be produce in a given time period. This prevents an attacker from overwhelming the system with too many requests. Implementing rate limiting can also help protect against brute force attacks. Where an attacker tries to guess a password by repeatedly sending authentication requests.

Validate Input and Output Data

Input validation is the process of checking the data that is receive by the API to ensure that it is valid. And conforms to the expected format. Output validation is the process of checking the data that is return by the API to ensure that it is valid and does not contain any malign code. It is vital to validate both input and output data to prevent attacks such as SQL injection and Cross-Site Scripting (XSS).

Use Token-Based Authentication

Token-based authentication is a more secure way of authentication than using password. It involves the use of tokens instead of passwords for authentication. Tokens randomly generate strings that are unique to each user or client system. They are issued by the server and expire after a certain amount of time. Token-based authentication is more secure than password based verification because it remove the need for the user to send their password over the internet.

Implement API Key Authentication

API Key authentication involves using a unique key that is issued to each user or client system. The key is used to authenticate the user or client system for each request made to the API. API Key authentication is a simple way to provide access to the API without the need for passwords. It is also more secure than password based authentication because the key can be revoked if it is compromised.


Securing web APIs is crucial to ensure the protection of sensitive data and prevent attacks. By applying the best practices given in this blog post, you can improve the security of your web APIs and reduce the risk of security breach. Remember to always stay up to date with the latest security practices and standards to ensure that your web APIs are always secure.