# UpstashRedisChatMessageHistory

> **Class** in `langchain_community`

📖 [View in docs](https://reference.langchain.com/python/langchain-community/chat_message_histories/upstash_redis/UpstashRedisChatMessageHistory)

Chat message history stored in an Upstash Redis database.

## Signature

```python
UpstashRedisChatMessageHistory(
    self,
    session_id: str,
    url: str = '',
    token: str = '',
    key_prefix: str = 'message_store:',
    ttl: Optional[int] = None,
)
```

## Extends

- `BaseChatMessageHistory`

## Constructors

```python
__init__(
    self,
    session_id: str,
    url: str = '',
    token: str = '',
    key_prefix: str = 'message_store:',
    ttl: Optional[int] = None,
)
```

| Name | Type |
|------|------|
| `session_id` | `str` |
| `url` | `str` |
| `token` | `str` |
| `key_prefix` | `str` |
| `ttl` | `Optional[int]` |


## Properties

- `redis_client`
- `session_id`
- `key_prefix`
- `ttl`
- `key`
- `messages`

## Methods

- [`add_message()`](https://reference.langchain.com/python/langchain-community/chat_message_histories/upstash_redis/UpstashRedisChatMessageHistory/add_message)
- [`clear()`](https://reference.langchain.com/python/langchain-community/chat_message_histories/upstash_redis/UpstashRedisChatMessageHistory/clear)

---

[View source on GitHub](https://github.com/langchain-ai/langchain-community/blob/4b280287bd55b99b44db2dd849f02d66c89534d5/libs/community/langchain_community/chat_message_histories/upstash_redis.py#L15)