# API GraphQL introduction ## Queries and Mutations **Queries** are used to fetch data. They are typically considered to not change values on the server-side and can be run in parallel. **Mutations** are used to change objects on the server-side and are intended to be run one at a time for a given resource. ## Access to the API The API can be accessed 1. through the [Developer Playground](https://admin.wifi.unwired.at/developer/playground) UI 1. programmatically via [https://api.wifi.unwired.at/](https://api.wifi.unwired.at/) ## GraphQL background - GraphQL introduction: [https://graphql.org/learn/](https://graphql.org/learn/)