API Security: When Hotel Systems Talk to Each Other

As hotels rapidly digitize their operations, Application Programming Interfaces, or APIs, have become the unsung heroes behind the scenes.

But with the integration of APIs comes the crucial responsibility of ensuring their security.

This week’s feature of the VENZA Echo will dive into the world of hotel technology and understand the paramount importance of API security.

What are APIs?

APIs, in the simplest terms, act as middlepersons—allowing different software applications to communicate and share information.

Think of APIs as the conduits that let your property management system talk to online booking platforms, room service orders to sync with billing systems, or digital key systems to communicate with guest mobile apps.

They facilitate real-time data exchange, ensuring a seamless guest experience and efficient operations.

However, this interconnectedness, while beneficial, also brings its own set of challenges.

Securing API Keys: As Crucial as Passwords

APIs function using ‘keys,’ which are unique identifiers allowing access to specific functions or data.

Much like how a physical key grants access to a room, an API key grants access to a particular software function.

In the wrong hands, these keys can open doors to a plethora of sensitive information, from guest personal details to financial transactions. Therefore, the security of API keys is as critical, if not more so, as safeguarding passwords.

If an attacker gains unauthorized access to an API key, they could manipulate room bookings, access confidential guest data, or even redirect payments.

The fallout from such breaches isn’t just financial—the reputational damage can have long-lasting implications for a hotel’s brand.

Best Practices for API Security

Given the importance of API security for hoteliers, VENZA recommends that you adopt strict best practices to maintain their security.

Among these include the following:

1. Limiting Access. Not every system or individual in a hotel needs access to all APIs. Implementing a strict access control policy ensures that only authorized individuals or systems can use specific APIs. For instance, the reservation system doesn’t necessarily need to communicate with the food and beverage platform.

2. Regular Key Rotations. Just as you’d change passwords regularly, it’s essential to rotate API keys. By changing these keys at regular intervals, even if a key is compromised, its shelf life is limited, reducing potential damage.

3. Alerts. Constantly monitor API calls. This doesn’t just mean looking at the data flow but analyzing it for anomalies. If, for instance, there’s a sudden surge in room bookings from a particular source in the middle of the night, it might be a red flag. Implementing real-time alerts for such anomalies can help in taking swift corrective actions.

4. Use Gateways. API gateways act as gatekeepers, controlling how requests are handled. They can help in rate limiting (preventing a system from getting overwhelmed by too many requests), filtering malicious content, and even blocking certain types of requests. Similarly, firewalls can help filter out suspicious traffic, offering an added layer of protection.


As with all technologies, APIs are a double-edged sword. Ensuring the security of APIs is not just a technical necessity but an imperative to maintain trust and brand reputation. As hoteliers, embracing technology should go hand in hand with understanding and implementing robust security measures.

Feeling overwhelmed? Don’t be. VENZA is here to help. Cybersecurity is complex, but in partnership with us, your company can get started in as little as one month. Get a live demonstration today by contacting our Customer Success Team.

Ready to elevate your game? Contact Sales to discuss signing up for our programs or adding new solutions to your contract.


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