n8n-nodes-slng community node brings SLNG into your n8n workflows. It adds
two nodes: SLNG, an action node for text to speech, speech to text, and
outbound agent calls, and SLNG Trigger, which lets a voice agent call a
workflow as a tool during a call.
Prerequisites
- A self-hosted n8n instance. n8n Cloud does not run unverified community nodes.
- An SLNG API key. Create one at app.slng.ai/api-keys, or see Create your API key.
Install the node
slng-ai/n8n-nodes-slng
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1
Open Community Nodes
In n8n, go to Settings then Community Nodes and click Install.
2
Install the package
Enter
n8n-nodes-slng and confirm.3
Restart n8n
Restart n8n so the nodes load. Do this again after each update.
Add your SLNG credential
Both nodes authenticate with one credential.1
Create the credential
Add a new SLNG API credential and paste your key. n8n validates it
against
GET https://api.slng.ai/v1/me.2
Reuse it across nodes
The same credential covers the Voice API (
api.slng.ai) and the Agents API
(api.agents.slng.ai), so every SLNG node in a workflow can share it.Use the nodes
The package adds two nodes:- The SLNG node generates speech, transcribes audio, and dispatches outbound agent calls.
- The SLNG Trigger node starts a workflow when a voice agent calls it as a tool, mid-conversation.
Next steps
- Connect a phone number and dispatch outbound calls for agent calling.
- Use n8n for tools to give an agent workflow-backed tools.
- The model catalog for text to speech and speech to text.