> ## 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.

# ACL CAT

> List command categories.

Use `ACL CAT` to discover the category names usable in [`ACL SETUSER`](/docs/redis/commands/server/acl-setuser) rules such as `+@read` or `-@dangerous`.

Called without an argument, it returns every category name the server knows, for example `read`, `write`, `keyspace`, `dangerous`, `admin`, `scripting`, and the categories for individual data types such as `string`, `hash`, or `json`. Called with a category name, it instead returns the commands that belong to that category, which is the fastest way to check exactly what a rule like `+@json` grants before applying it to a user.

## Syntax

```redis theme={"system"}
ACL CAT [category]
```

## Arguments

| Argument | Required | Repeatable | Description |
| - | - | - | - |
| `category` | No | No | When given, list the commands in this category instead of listing category names. |

## Important points

* An unknown category name returns an error rather than an empty list.

## Response

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.

| Protocol | Reply |
| - | - |
| RESP2 | Array of bulk strings |
| RESP3 | Array of bulk strings |

> [!NOTE]
>
> Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.

## Examples

TCP examples use the TLS `REDIS_URL` from the Upstash console. REST examples use `UPSTASH_REDIS_REST_URL` and `UPSTASH_REDIS_REST_TOKEN`.

> **Redis CLI**
>
> ```bash theme={"system"}
> ACL CAT read
> ```

> **@upstash/redis**
>
> > [!NOTE]
> >
> > This command is not supported yet in `@upstash/redis`.

> **upstash\_redis**
>
> > [!NOTE]
> >
> > This command is not supported yet in `upstash_redis`.

> **ioredis**
>
> ```ts theme={"system"}
> import Redis from "ioredis";
>
> const redis = new Redis(process.env.REDIS_URL!);
> const result = await redis.acl("CAT", "read");
> console.log(result);
> ```

> **node-redis**
>
> ```ts theme={"system"}
> import { createClient } from "redis";
>
> const client = await createClient({ url: process.env.REDIS_URL })
>   .on("error", console.error)
>   .connect();
> const result = await client.aclCat("read");
> console.log(result);
> ```

> **redis-py**
>
> ```python theme={"system"}
> import os
> import redis
>
> client = redis.from_url(os.environ["REDIS_URL"])
> result = client.acl_cat("read")
> print(result)
> ```

> **go-redis**
>
> ```go theme={"system"}
> package main
>
> import (
>     "context"
>     "fmt"
>     "os"
>
>     "github.com/redis/go-redis/v9"
> )
>
> func main() {
>     opts, err := redis.ParseURL(os.Getenv("REDIS_URL"))
>     if err != nil {
>         panic(err)
>     }
>     client := redis.NewClient(opts)
>     result, err := client.ACLCatArgs(context.Background(), &redis.ACLCatArgs{
>         Category: "read",
>     }).Result()
>     if err != nil {
>         panic(err)
>     }
>     fmt.Println(result)
> }
> ```

> **jedis**
>
> ```java theme={"system"}
> import java.net.URI;
>
> import redis.clients.jedis.Jedis;
>
> try (Jedis jedis = new Jedis(new URI(System.getenv("REDIS_URL")))) {
>   Object result = jedis.aclCat("read");
>   System.out.println(result);
> }
> ```

> **redis-rs**
>
> ```rust theme={"system"}
> use redis::TypedCommands;
>
> fn main() -> redis::RedisResult<()> {
>     let url = std::env::var("REDIS_URL").expect("REDIS_URL is not set");
>     let client = redis::Client::open(url)?;
>     let mut connection = client.get_connection()?;
>
>     let result = connection.acl_cat_categoryname("read")?;
>     println!("{result:?}");
>     Ok(())
> }
> ```


## Related topics

- [ACL SETUSER](/docs/redis/commands/server/acl-setuser.md)
- [ACL SAVE](/docs/redis/commands/server/acl-save.md)
- [ACL LOAD](/docs/redis/commands/server/acl-load.md)
- [ACL LOG](/docs/redis/commands/server/acl-log.md)
- [ACL GENPASS](/docs/redis/commands/server/acl-genpass.md)


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