What is API Key?
A unique code passed with API requests to identify the calling application and control access.
Why It Matters
API keys let service providers track usage, enforce limits, and revoke access if needed.
Real-World Example
Including your API key in requests to the Google Maps API so Google knows which account to bill.
“Understanding terms like API Key matters because it helps you have better conversations with developers and make smarter decisions about your software. You do not need to be technical. You just need to know enough to ask the right questions.”
Related Terms
API
A way for different software applications to talk to each other and share data
Secret Management
The practice of securely storing, accessing, and rotating sensitive data like passwords, API keys, and certificates.
Authentication
The process of verifying who someone is, usually through a username and password
Environment Variables
Secret settings stored outside your code, like passwords and API keys
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Related Terms
API
A way for different software applications to talk to each other and share data
Authentication
The process of verifying who someone is, usually through a username and password
Environment Variables
Secret settings stored outside your code, like passwords and API keys
Secret Management
The practice of securely storing, accessing, and rotating sensitive data like passwords, API keys, and certificates.
Authorisation
Determining what actions or data a verified user is allowed to access
OAuth
A standard that lets you log into apps using your existing accounts from Google, Facebook, or other providers