> For the complete documentation index, see [llms.txt](https://docs.blynk.io/en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.blynk.io/en/blynk.cloud/device-https-api/get-device-metafield-value.md).

# Get Device Metadata Value

You can get the value of any single-value (text, number, email, hostspot, device name, list, int, imei, image, iccid, device owner email) device meta field using it **exact name** (case sensitive).

**loc.latlon** is special hardcoded internal meta field to get device location "lat lon".

## Get Device Metafield Value

<mark style="color:blue;">`GET`</mark> `https://{server_address}/external/api/device/meta?token={token}&metaFieldId={metaFieldId}`

{% swagger-response status="400" description="Could not find a device token or Wrong metaField format or Could not find metaField id" %}

```
{"error":{"message":"Invalid token."}}

or

{"error":{"message":"Wrong metaField format."}}

or

{"error":{"message":"MetaField doesn't exist."}}
```

{% hint style="info" %}
You can get the **Device auth token** in [Device info](https://bit.ly/BlynkSimpleAuth).
{% endhint %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://docs.blynk.io/en/blynk.cloud/device-https-api/get-device-metafield-value.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.