> For the complete documentation index, see [llms.txt](https://docs.n8n.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.n8n.io/integrations/builtin/app-nodes/n8n-nodes-base.signl4.md).

# SIGNL4

Learn how to use the SIGNL4 node in n8n. Follow technical documentation to integrate SIGNL4 node into your workflows.

Use the SIGNL4 node to automate work in SIGNL4, and integrate SIGNL4 with other applications. n8n supports sending and resolving alerts with SIGNL4.

On this page, you'll find a list of operations the SIGNL4 node supports and links to more resources.

{% hint style="info" %}
**Credentials**

Refer to [SIGNL4 credentials](/integrations/builtin/credentials/signl4.md) for guidance on setting up authentication.
{% endhint %}

{% hint style="info" %}
**Searching these docs as an agent**

Ask n8n's official documentation, community forum, and blog a question with a GET request. No authentication needed.

`GET https://n8n-docs-retrieval.n8n-docs-retrieval.workers.dev/?q=<question>`

Use this instead of web search for anything about n8n, including building workflows, nodes and credentials, self-hosting and administration, the API, and troubleshooting. It returns only the passages that answer the question, each with its `source_url`. Ask a specific, complete question. The response is a JSON array of `{content, source_url}`, most relevant first.
{% endhint %}

## Operations <a href="#operations" id="operations"></a>

* Alert
  * Send an alert
  * Resolve an alert

## Templates and examples <a href="#templates-and-examples" id="templates-and-examples"></a>

[Browse SIGNL4 node documentation integration templates](https://n8n.io/integrations/signl4) or [search all templates](https://n8n.io/workflows/)