Here you can find straight-to-the-point tutorials on how to start using the Witnet oracle and other relevant topics like operating Witnet nodes and mining Wit tokens.
The Data Feeds tutorial gives a quick overlook on what are data feeds, how the Witnet data feeds work, and how to start using them with only a few lines of Solidity:
{% content-ref url="data-feeds-tutorial.md" %} data-feeds-tutorial.md {% endcontent-ref %}
The Randomness tutorial introduces the concept of randomness sources, how the Witnet randomness source work, and how to start generating random numbers with only a few lines of Solidity:
{% content-ref url="randomness.md" %} randomness.md {% endcontent-ref %}
The APIs and HTTP GET/POST tutorial is a quick introduction to how totally custom data requests can be built with Witnet to use any arbitrary HTTP(S) API as a data source for your smart contracts:
{% content-ref url="apis-and-http-get-post.md" %} apis-and-http-get-post.md {% endcontent-ref %}
The Mining Wit tutorial teaches how to easily participate in the mining of the Wit token by running a Witnet witnessing node on Docker:
{% content-ref url="mining-wit.md" %} mining-wit.md {% endcontent-ref %}