Hello Priyam

OutSystems provides built-in functionality to expose and consume APIs, and it also has support for using JWT tokens to secure API calls.

Here are the high-level steps for using JWT tokens in OutSystems to expose and consume an API:

• Generate a JWT token: You will need to generate a JWT token that contains the required information, such as the user ID, expiration time, and any custom claims you want to include.
• Expose the API: Use the OutSystems API feature to expose the API you want to secure with the JWT token.
• Secure the API: In the API definition, set the authentication type to "JWT token" and specify the secret key and other relevant information needed to validate the token.
• Consume the API: In your OutSystems module that will consume the API, use the "REST" feature to make a REST call to the API endpoint.
• Include the JWT token: In the REST call, add a header with the name "Authorization" and the value "Bearer {JWT token}" to include the JWT token in the request.
• Validate the JWT token: In the API definition, OutSystems will automatically validate the JWT token and allow the request to proceed if it's valid. If the token is invalid or has expired, OutSystems will return an error response.