---
title: KV
description: Specify KV namespaces to add to your environment as follows:
image: https://developers.cloudflare.com/dev-products-preview.png
---

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# KV

* [KV Reference](https://developers.cloudflare.com/kv/api/)

## Namespaces

Specify KV namespaces to add to your environment as follows:

JavaScript

```
const mf = new Miniflare({  kvNamespaces: ["TEST_NAMESPACE1", "TEST_NAMESPACE2"],});
```

You can now access KV namespaces in your workers:

JavaScript

```
export default {  async fetch(request, env) {    return new Response(await env.TEST_NAMESPACE1.get("key"));  },};
```

Miniflare supports all KV operations and data types.

## Manipulating Outside Workers

For testing, it can be useful to put/get data from KV outside a worker. You can do this with the `getKVNamespace` method:

JavaScript

```
import { Miniflare } from "miniflare";
const mf = new Miniflare({  modules: true,  script: `  export default {    async fetch(request, env, ctx) {      const value = parseInt(await env.TEST_NAMESPACE.get("count")) + 1;      await env.TEST_NAMESPACE.put("count", value.toString());      return new Response(value.toString());    },  }  `,  kvNamespaces: ["TEST_NAMESPACE"],});
const ns = await mf.getKVNamespace("TEST_NAMESPACE");await ns.put("count", "1");
const res = await mf.dispatchFetch("http://localhost:8787/");console.log(await res.text()); // 2console.log(await ns.get("count")); // 2
```

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