JSON in REST APIs

REST APIs send and receive JSON. The client sends JSON in the request body (e.g., POST), and the server responds with JSON. Always set Content-Type: application/json.

• GET returns JSON in the body
• POST/PUT/PATCH send JSON in the body
• Content-Type: application/json header
• Status codes: 200 OK, 201 Created, 400 Bad Request, 404 Not Found

{
  "data": [
    {"id": 1, "title": "First Post"},
    {"id": 2, "title": "Second Post"}
  ],
  "meta": {
    "page": 1,
    "total": 42
  }
}