Technology
Open API
Also written: API
What Open API means
An Open API (Application Programming Interface) is a publicly accessible interface that allows different software applications to exchange data seamlessly without custom integration code. In hospitality software, it enables third-party tools to connect directly to core platforms like Property Management Systems.
How it is used
Operators use open APIs to assemble specialized technology stacks rather than relying on monolithic legacy vendors. By selecting PMS, revenue management, point-of-sale, and guest messaging systems with documented open APIs, engineering teams automate data synchronization, reduce manual entry errors, and deploy new tools within days. Revenue managers benefit through real-time rate updates pushed automatically to distribution channels without middleware fees.
Worked example
A 150-room hotel connects a new upsell tool to its PMS using an open API. When a guest books, the API pushes reservation data to the upsell engine in under two seconds. The system automatically offers a room upgrade via SMS, generating $4,500 in incremental monthly revenue without staff intervention.
Common mistake
Assuming an open API means access is completely free, as vendors often charge API maintenance fees or limit transaction volumes despite the code being accessible.
Related terms
Open API in our reporting
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