The Cryptocurrency Price Fetcher API is a Flask-based service that retrieves current cryptocurrency prices using the CoinGecko API. This service can be deployed on cloud platforms like Google Cloud Run and is ideal for integration into various projects requiring real-time cryptocurrency price data.

Fetches real-time cryptocurrency prices from CoinGecko.

Implements caching to reduce API calls and improve performance.

Includes a retry mechanism for failed fetch attempts.

Secures access with API key authentication.

Supports multiple cryptocurrency queries in a single request.

Python 3.7+

Docker

A Docker Hub account

Google Cloud account (for Google Cloud Run deployment)

git clone <repository-url> cd <repository-directory>

pip install -r requirements.txt

Create an api_keys.json file in the project root:

{ "key1": "your_api_key_1", "key2": "your_api_key_2" }

docker build -t crypto-price-fetcher . docker tag crypto-price-fetcher <your-dockerhub-username>/crypto_price_fetcher:latest docker push <your-dockerhub-username>/crypto_price_fetcher:latest

Ensure you have the Google Cloud SDK installed and configured.

Deploy the container:

gcloud run deploy --image <your-dockerhub-username>/crypto_price_fetcher:latest --platform managed

{ "cryptos": ["bitcoin", "ethereum", "dogecoin"] }

{ "bitcoin": {"price": 50000.25, "source": "cache"}, "ethereum": {"price": 3000.80, "source": "coingecko"}, "dogecoin": {"price": 0.25, "source": "coingecko"} }

CACHE_FILE: Set the path for the cache file (default: 'crypto_cache.json')

API_KEYS_FILE: Set the path for the API keys file (default: 'api_keys.json')

Caching duration: Modify max_age in the is_cache_valid function (default: 5 minutes)

Retry interval: Adjust the should_retry function (default: 1 hour)

Cache update interval: Change the sleep duration in the update_cache function (default: 5 minutes)

Invalid API key: Returns a 401 Unauthorized error

Missing or invalid request body: Returns a 400 Bad Request error

Failed to fetch cryptocurrency price: Returns an error message in the response for the specific cryptocurrency

Please read CONTRIBUTING.md for details on our code of conduct and the process for submitting pull requests.

This project is licensed under the MIT License - see the LICENSE.md file for details.