Your App  →  HTTP Request  →  API Server
              (GET, POST)         ↓
Your App  ←  JSON Response  ←  API Server

Add [Service] API with key in Authorization header:
Key: your-api-key-here

Add [Service] API with key as query parameter:
Key: your-api-key-here

Add [Service] API with Bearer token:
Token: your-token-here

Add OAuth authentication for [Service]:
- Client ID: xxxxx
- Client Secret: xxxxx
- Redirect URL: your-app://callback

Fetch the list of items from [API]:
Endpoint: GET https://api.service.com/items

Send user data to [API]:
Endpoint: POST https://api.service.com/users
Body: { name, email }

Search [API] with query parameters:
Endpoint: GET https://api.service.com/search?q={query}&limit=10

The API returns:
{
  "results": [
    { "id": 1, "name": "Item 1" },
    { "id": 2, "name": "Item 2" }
  ],
  "total": 100
}

Parse this and display the results in a list.

Create a model for the API response:
- Item has: id (Int), name (String), description (String?)
- Response has: results (array of Items), total (Int)

Handle API errors:
- 401: Show "Invalid API key"
- 404: Show "Not found"
- 429: Wait 30 seconds and retry
- 500: Show "Service unavailable, try later"

If rate limited:
- Show "Please wait" message
- Wait for limit reset
- Use exponential backoff
- Cache responses to reduce calls

Cache API responses:
- Store response with timestamp
- Use cached data if less than 5 minutes old
- Refresh in background
- Show cached data immediately while loading fresh data

Integrate NewsAPI.org:

1. API Key: your-news-api-key
2. Endpoint: GET https://newsapi.org/v2/top-headlines
3. Parameters: country=us, category=technology

Display:
- List of articles
- Each shows: title, source, thumbnail
- Tap to open in Safari

Integrate Giphy:

1. API Key: your-giphy-key
2. Endpoint: GET https://api.giphy.com/v1/gifs/search
3. Parameters: q={searchTerm}, limit=20

Display:
- Grid of GIF thumbnails
- Tap to view full GIF
- Share button

Integrate ExchangeRate-API:

1. API Key: your-key
2. Endpoint: GET https://v6.exchangerate-api.com/v6/{key}/latest/USD

Build:
- Currency converter
- Select from/to currencies
- Enter amount
- Show converted result
- Cache rates for 1 hour

Add a test screen that:
- Makes a test API call
- Logs the response
- Shows success/failure