API Security: 10 Best Practices for REST API Security [Updated 2024]

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API Security: 10 Best Practices for REST API Security [Updated 2024]

REST (Representational State Transfer) is a popular architectural style for developing web-based APIs.  Most current web framework-based apps will include one or more REST APIs.  A straightforward and adaptable method of constructing a web API is REST.  In addition, it is more of a collection of architectural restrictions than a standard protocol to engage Best Practices for REST API Security

There are three causes for which you might write a REST API:

  1. To grant a linked client that you generated permission to view data on your server, such as a single-page browser application or a mobile app on the phone.
  2. To provide programmatic access to the data that your app manages for end users, including both humans and programs.
  3. To enable communication between the various services that make up the backbone of your app.

In addition to this, in the blog, we will try to learn about the mainstream API Security Best Practices

What is API Security?

The security procedures used to protect interaction between software programs or services that employ APIs are referred to as API (Application Programming Interface) security.  Because APIs are frequently utilized for exchanging information and services between many systems, attackers find them to be lucrative targets.

In addition, protecting APIs from numerous risks, including intrusions by unauthorized parties, data breaches, denial-of-service attacks, and injection attacks, is referred to as API security.

What are the Types of API Security?

There can be several types of API Security that can be mentioned.  However, we have attempted to brief some of them in the following table:

Authentication The true identity of the API client or user is confirmed by authentication.  JSON Web Tokens (JWTs), OAuth, and API keys are frequently used authentication techniques.
Authorization What an authorized user or client may accomplish with the API depends on the authorization.  Role-based access control (RBAC) and attribute-based access control (ABAC) policies are two frequently used authorization techniques.
Encryption Data exchanged between the API client and server is protected by encryption through the use of secure protocols like SSL/TLS.  By doing this, attackers are unable to intercept and read private information.
Input validation Input validation makes ensuring that the information that the API receives is in the right format and is free of harmful code.  By doing this, popular threats like SQL injection and cross-site scripting (XSS) are stopped.
Rate limiting The number of queries that an API client can make in a given amount of time is limited by rate limitation.  By doing this, denial-of-service attacks are avoided, and everyone can access the API.

Apart from the above-mentioned types of API Security, there are some other types are there, such as API gateway security, logging & monitoring, API keys, OAuth, etc., that are widely used by various penetration testers to perform several activities related to secure numerous IT infrastructures.

Top API Security Risks

In today’s development of software, APIs are getting more and more common, and with increasing utilization come increased hazards.  The following are some of the major API security risks that businesses need to be mindful of:

  • Injection attacks,
  • Broken authentication and authorization,
  • Insufficient encryption,
  • Broken access controls,
  • Inadequate monitoring and logging,
  • Lack of rate limiting,
  • Data exposure,
  • Insufficient validation of inputs,
  • Malware and bot attacks, etc.

10 API Security Best Practices

The following list of 10 API Security Best Practices should be followed by enterprises to protect their APIs:

Use strong authentication mechanisms To guarantee that only permitted individuals and programs can access APIs, reliable authorization mechanisms like OAuth or JSON Web Tokens (JWTs) should be used.
Implement rate limiting Rate restriction should be used to defend APIs from DoS attacks to stop an individual or application from flooding the API with responses.
Implement encryption To prevent eavesdropping by hackers, all sensitive data sent over APIs should be protected using robust encryption protocols like SSL/TLS.
Validate user input To avoid injection attacks like SQL injection or cross-site scripting, all user input should be verified.
Implement access controls In order to guarantee that only approved users and apps are able to view confidential information through the API, access restrictions should be put in place.
Use API gateways By providing authentication, authorization, and rate restriction, along with additional security features, API gateways can give an extra degree of safeguarding to APIs.
Keep APIs up-to-date To stop identified weaknesses from exploitation, APIs must be maintained up-to-date with the most recent security fixes and updates.
Implement logging and monitoring To detect and react to security incidents in real time, logging and monitoring systems should be put into use.
Test APIs regularly To find flaws and possible threats to security, APIs should undergo routine automated testing.
Conduct regular security audits To find potential vulnerabilities and confirm that API security mechanisms are working properly, standard security audits should be carried out.


About API Security: 10 Best Practices for REST API Security

1: Which authentication is most secure for API?

One of the finest and most reliable API authentication methods available right now is OAuth 2.0.  A reliable and defined method for third-party applications to obtain data from an individual’s account without disclosing the user’s password is provided by the open standard for authorization known as OAuth 2.0.

2: What is API security process?

A company’s APIs and the confidential information transferred over them are secured using an API security process, which consists of a number of processes and procedures.

3: Do I need to consider API security best practices?

To make certain that your APIs are safe and that the sensitive data communicated through them is shielded from illicit access and harmful assaults, it is essential to take API security best practices into account.

As they offer a direct route for obtaining sensitive data and system resources, APIs are frequently targeted by attackers.  A security breach may lead to substantial monetary losses, reputational harm, and legal repercussions.  Best practices for API security implementation can reduce these hazards and safeguard your company from security problems.

4: What is API security best practices checklist?

Below-mentioned is the API security best practices checklist:

  • Use strong authentication mechanisms,
  • Implement encryption,
  • Validate user input,
  • Implement access controls,
  • Implement rate limiting,
  • Use API gateways,
  • Keep APIs up-to-date,
  • Implement logging and monitoring,
  • Test APIs regularly,
  • Conduct regular security audits, etc.

5: How to secure APIs?

To secure APIs, organizations can follow these best practices:

  • Use strong authentication mechanisms,
  • Implement encryption,
  • Validate user input,
  • Implement access controls,
  • Implement rate limiting,
  • Use API gateways,
  • Keep APIs up-to-date,
  • Implement logging and monitoring,
  • Test APIs regularly,
  • Conduct regular security audits, etc.


In a nutshell, we have tried our level best to shed some crucial light on API Security: 10 Best Practices for REST API Security.  Moreover, suppose a person is willful to take the same category of facilities for one’s individual or organizational security posture enhancement.  In that case, the same can opt for the world-class API Security Services by Craw Security, the best penetration testing service provider in Singapore.  To know more about the same or to ask for a quote, give us a call on our 24X7 hotline mobile number at +65-93515400.


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