What is API?
Application Programming Interface. A set of definitions and protocols for building and integrating application software.
Deep Dive
APIs let your product or service communicate with other products and services without having to know how they’re implemented.
For example, when you use a 'Login with Google' button or display a Google Map on your site, you are using an API.
Key Takeaways
- Enables connectivity between modern apps.
- REST and GraphQL are common API architectures.
- Essential for integrations (e.g., Salesforce to Website).
- Allows for headless CMS architectures.
Why This Matters Now
The world runs on APIs. It is the digital glue of the economy. When you book an Uber (Maps API + Payment API + Twilio SMS API), you are using 5 different services at once.
For businesses, APIs mean you don't have to reinvent the wheel. You don't build a mapping system; you rent Google's.
Common Myths & Misconceptions
It's only for developers.
Reality:True, developers write them. But business leaders need to understand the 'API Economy' to build partnerships and integrations.
APIs are insecure.
Reality:Public APIs are secured with keys and tokens. You only give access to exactly the data you want to share.
Real-World Use Cases
Payment Gateways: Stripe API lets any website accept credit cards without becoming a bank.
Weather Apps: They don't have satellites. They just call the Weather Channel API to get the temperature for your zip code.
Frequently Asked Questions
REST vs GraphQL?
REST is like ordering from a menu (you get the whole dish). GraphQL is like a buffet (you take exactly the shrimp and broccoli you want). GraphQL is newer and more efficient.
What is an API Key?
It's like a password for a machine. It tracks who is using the API and allows the owner to bill them or block them.
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