# Filters

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{% hint style="info" %}
**How Filters Work**

Filters create automatic responses when specific keywords or phrases are detected in messages.

**Single-word filters:** Match when used as a command (e.g., typing "ca" or "/ca" triggers the filter)

**Multi-word filters:** Match when the phrase appears ANYWHERE in a message (case-insensitive)
{% endhint %}

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#### <mark style="color:blue;">/filter</mark> <mark style="color:red;">(Admin)</mark>

`/filter word response text here /filter "multi word phrase" response text here`

Create a new filter. For single words, the word becomes a trigger command. For multi-word phrases, wrap in quotes - it will match anywhere in messages.

**Examples:**

`/filter website https://example.com` - Triggers on /website or website

`/filter "when moon" Soon! Keep holding!` - Triggers whenever "when moon" appears in any message.

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#### <mark style="color:blue;">/filters</mark> <mark style="color:$success;">(All Users)</mark>

`/filters`

Display all active filter keywords/phrases for the group.

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#### <mark style="color:blue;">/removefilter</mark> <mark style="color:red;">(Admin)</mark>

`/removefilter keyword`

Remove a specific filter by its keyword.

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#### <mark style="color:blue;">/removeallfilters</mark> <mark style="color:red;">(Admin)</mark>

`/removeallfilters`

Remove ALL filters from the group. Use with caution!

***

{% hint style="info" icon="check" %}
**Special Filter: CA**

Setting a filter with keyword "ca" or "/ca" will also automatically set the group's contract address, enabling the `/mcap` command and other crypto features.
{% endhint %}


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.odin.tools/tools/heimdall-protection-bot/filters.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.