# ChangeDetection.io Web page monitoring and notifications API REST API for managing Page watches, Group tags, and Notifications. changedetection.io can be driven by its built in simple API, in the examples below you will also find `curl` command line and `python` examples to help you get started faster. ## Where to find my API key? The API key can be easily found under the **SETTINGS** then **API** tab of changedetection.io dashboard. Simply click the API key to automatically copy it to your clipboard.  ## Connection URL The API can be found at `/api/v1/`, so for example if you run changedetection.io locally on port 5000, then URL would be `http://localhost:5000/api/v1/watch/cc0cfffa-f449-477b-83ea-0caafd1dc091/history`. If you are using the hosted/subscription version of changedetection.io, then the URL is based on your login URL, for example: `https://<your login url>/api/v1/watch/cc0cfffa-f449-477b-83ea-0caafd1dc091/history` ## Authentication Almost all API requests require some authentication, this is provided as an **API Key** in the header of the HTTP request. For example: `x-api-key: YOUR_API_KEY`