Definition
API
An API, or application programming interface, is a defined way for software programs to talk to each other and exchange data. APIs let a CRM connect with other tools, so information can flow automatically between systems without anyone copying it by hand.
An API is the doorway one program offers so others can request its data or services. When your booking tool sends a new appointment to your CRM automatically, it does so through an API, following the agreed rules for how to ask and respond.
For a business, APIs are what make integrations possible. They are usually invisible to the user but essential behind the scenes, letting your different tools share information so your systems stay connected and your data stays consistent.
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