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Endpoint
The specific API address for a capability, such as weather, company matching, or email verification.
Lesson 3 · Request and response
How do APIs work?
Most API interactions follow a simple round trip. Your software sends a request to an endpoint, the service processes it, and the response comes back carrying the requested data or status.
Request out, requested data back
Your AppAsks for Chicago weather
API EndpointReceives the request
Weather ServiceGets the requested information
Request
GET /weather?city=ChicagoResponse
72°F · Sunny · 55% humidity📤
Request
The message your software sends. It usually includes an action, input values, and sometimes authentication.
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Response
The API’s answer. It can contain requested data, a confirmation, or an error explaining what happened.
Remember the pattern: endpoint → request → processing → response. The response is the return trip carrying back the result of the original request.
Quick check
What is an API endpoint?