# 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. 

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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.bkcoracle.com/how-to/using-data-feed.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.