> ## Documentation index
> Fetch the complete documentation index at: https://upstash.com/docs/llms.txt
> Search it with GET https://upstash.com/docs/search?q=<query>.
> Use these to discover all available pages before exploring further.

# APPEND

> Append a value to a string stored at key.

## Arguments

<ParamField body="key"type="string" required>
  The key to get.
</ParamField>

<ParamField body="value" required>
  The value to append.
</ParamField>

## Response

<ResponseField  type="integer" required>
How many characters were added to the string.
</ResponseField>

<RequestExample>
```ts Example
await redis.append(key, "Hello");
// returns 5
```
</RequestExample>
