> ## Documentation Index
> Fetch the complete documentation index at: https://upstash.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# LSET

> Set a value at a specific index.

## Arguments

<ParamField body="key" type="string" required>
  The key of the list.
</ParamField>

<ParamField body="index" type="number" required>
  At which index to set the value.
</ParamField>

<ParamField body="data" type="TValue" required>
  The value to set.
</ParamField>

## Response

<ResponseField type="OK" required>
  `OK`
</ResponseField>

<RequestExample>
  ```ts Example  theme={"system"}
  await redis.lpush("key", "a", "b", "c"); 
  await redis.lset("key", 1, "d"); 

  // list is now ["a", "d", "c"]
  ```
</RequestExample>