> ## 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.

# JSON.ARRINSERT

> Insert values into JSON array.

Use `JSON.ARRINSERT` to insert one or more values into the arrays a path selects, before a given index.

Elements at and after that index shift to the right, keeping the rest of the array in order. A negative index counts from the end of the array and an index equal to the array's length appends, while an index outside the array returns an error. The reply is the new length of each array the path matched.

## Syntax

```redis theme={"system"}
JSON.ARRINSERT <key> <path> <index> <value> [value ...]
```

## Arguments

| Argument | Required | Repeatable | Description                                           |
| -------- | -------- | ---------- | ----------------------------------------------------- |
| `key`    | Yes      | No         | JSON document key.                                    |
| `path`   | Yes      | No         | Path selecting arrays.                                |
| `index`  | Yes      | No         | Insertion index; negative indexes count from the end. |
| `value`  | Yes      | Yes        | Valid JSON value to insert.                           |

## Important points

* Raw TCP examples pass JSON values as valid JSON text. Typed Upstash SDK helpers serialize native objects and values for you.
* Paths beginning with `$` use JSONPath and can match multiple values, so many JSON commands return an array of per-match results.

## 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 integer lengths or null values, one per matched path |
| RESP3    | Array of integer lengths or null values, one per matched path |

<Note>
  Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.
</Note>

## Examples

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

<AccordionGroup>
  <Accordion title="Redis CLI" icon="terminal">
    ```bash theme={"system"}
    JSON.ARRINSERT profile $.tags 0 '"first"'
    ```
  </Accordion>

  <Accordion title="@upstash/redis" icon="node-js" iconType="brands">
    ```ts theme={"system"}
    import { Redis } from "@upstash/redis";

    const redis = Redis.fromEnv();

    const length = await redis.json.arrinsert("key", "$.path.to.array", 2, "a", "b");
    ```
  </Accordion>

  <Accordion title="upstash_redis" icon="python" iconType="brands">
    ```python theme={"system"}
    from upstash_redis import Redis

    redis = Redis.from_env()
    result = redis.json().arrinsert("profile", "$.tags", 0, "first")
    print(result)
    ```
  </Accordion>

  <Accordion title="ioredis" icon="node-js" iconType="brands">
    ```ts theme={"system"}
    import Redis from "ioredis";

    const redis = new Redis(process.env.REDIS_URL!);
    const result = await redis.call("JSON.ARRINSERT", "profile", "$.tags", "0", "\"first\"");
    console.log(result);
    ```
  </Accordion>

  <Accordion title="node-redis" icon="node-js" iconType="brands">
    ```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.json.arrInsert("profile", "$.tags", 0, "first");
    console.log(result);
    ```
  </Accordion>

  <Accordion title="redis-py" icon="python" iconType="brands">
    ```python theme={"system"}
    import os
    import redis

    client = redis.from_url(os.environ["REDIS_URL"])
    result = client.json().arrinsert("profile", "$.tags", 0, "first")
    print(result)
    ```
  </Accordion>

  <Accordion title="go-redis" icon="golang" iconType="brands">
    ```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.JSONArrInsert(context.Background(), "profile", "$.tags", 0, "first").Result()
        if err != nil {
            panic(err)
        }
        fmt.Println(result)
    }
    ```
  </Accordion>

  <Accordion title="jedis" icon="java" iconType="brands">
    ```java theme={"system"}
    import java.net.URI;

    import redis.clients.jedis.JedisPooled;

    try (JedisPooled jedis = new JedisPooled(new URI(System.getenv("REDIS_URL")))) {
      Object result = jedis.jsonArrInsert("profile", new redis.clients.jedis.json.Path("$.tags"), 0, "first");
      System.out.println(result);
    }
    ```
  </Accordion>

  <Accordion title="redis-rs" icon="rust" iconType="brands">
    ```rust theme={"system"}
    use redis::JsonCommands;

    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: redis::Value = connection.json_arr_insert("profile", "$.tags", 0, &"first")?;
        println!("{result:?}");
        Ok(())
    }
    ```
  </Accordion>
</AccordionGroup>


## Related topics

- [JSON.ARRINSERT](/docs/redis/sdks/ts/commands/json/arrinsert.md)
- [JSON commands](/docs/redis/commands/json/overview.md)
- [JSON.FORGET](/docs/redis/commands/json/json-forget.md)
- [JSON.GET](/docs/redis/commands/json/json-get.md)