> For the complete documentation index, see [llms.txt](https://docs.bkcoracle.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bkcoracle.com/how-to/using-data-feed.md).

# Using Data Feed

To access our Data Feed service, you must subscribe using KDEV tokens, the Bitkub Chain developer utility token. Subscribing with KDEV tokens provides a cost-effective and efficient way to leverage the benefits of off-chain data in your smart contracts.

**Subscription Process:** To subscribe to our Data Feed service, follow these simple steps:

1. Deploy your Data Feed consumer contract. ([example contract](/examples/data-feed-consumer.md))
2. Acquire KDEV tokens through the Bitkub chain [developer console](https://console.bitkubchain.com/get-kdev).
3. Visit our website, connect your wallet, and navigate to the *Services > Data Feed Subscription* menu.
4. Click *Create new subscription* button.
5. Review the information, select the subscription plan, approve the KDEV token, and click *Create subscription* button.
6. Add the Data Feed consumer contract address to the subscription.
7. Optional, extend your subscription through our website. 

<br>