The ideal technology stack for integrating the KIU API with a travel agency’s CRM system includes:

1. Backend Framework: Use a robust backend framework like Node.js or Django to handle API requests and data processing.

2. Programming Language: JavaScript (for Node.js) or Python (for Django) are commonly used for API integrations.

3. Database: Implement a relational database such as PostgreSQL or MySQL to store and manage CRM data.

4. API Management Tools: Utilize API management tools like Apigee or Postman for monitoring and managing API calls.

5. Middleware: Employ middleware solutions such as Express.js (for Node.js) to manage API communication and data transformation.

6. CRM System Compatibility: Ensure the CRM system (e.g., Salesforce, HubSpot) can integrate with the chosen technology stack.

7. Security Protocols: Implement security measures such as OAuth for API authentication and HTTPS for secure data transmission.

8. Cloud Services: Leverage cloud services like AWS or Azure for scalability and reliability.

For expert assistance, Provab’s API Integration Services can help.

In summary, the technology stack should include a robust backend framework, appropriate programming language, a reliable database, API management tools, middleware, CRM compatibility, security protocols, and cloud services.