How to generate and manage api keys in asp net core


ASP.NET is a popular language used for building web applications. In this article, we will discuss how to generate and manage API keys in ASP.NET Core.

What are API Keys?

API keys are unique identifiers that are used to authenticate and authorize access to an API. They are typically used to track and control access to APIs, ensuring that only authorized users or applications can make requests.

Generating API Keys

To generate API keys in ASP.NET Core, you can use the built-in Guid class to generate a unique identifier. Here's an example:

 apiKey = Guid.NewGuid().ToString();

In the above example, we generate a new GUID and convert it to a string to use as the API key. This ensures that each generated key is unique.

Storing API Keys

Once you have generated an API key, you need to store it securely. Storing API keys in plain text or in a publicly location can lead to security vulnerabilities. One approach is to store the API keys in a configuration file or environment variables.

Here's an example of storing the API key in the .json configuration file:

  "AppSettings": {
    "ApiKey": "your-api-key"

In this example, the API key is under the “AppSettings” section in the configuration file. You can then access the API key in your code by reading the configuration file.

API Keys

Managing API keys involves controlling access and revoking keys when necessary. One approach is to create a database table to store the API keys along with additional information such as the associated user or application.

Here's an example of a API key management table:

public class ApiKey
    public int Id { get; set; }
    public string Key { get; set; }
    public string UserId { get; set; }
    public DateTime CreatedAt { get; set; }
    public DateTime? RevokedAt { get; set; }

In this example, the ApiKey class represents a single API key. It includes properties such as the key , the associated user or application ID, and timestamps for creation and revocation.

You can then use this table to manage API keys, including creating new keys, associating them with users or applications, and revoking keys when necessary.


In this article, we discussed how to generate and manage API keys in ASP.NET Core. We covered the basics of generating unique keys, storing them securely, and managing access to the keys. By following these best , you can ensure the security and integrity of your ASP.NET Core applications.

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