Action Nodes

Action capabilities in Talkif fall into three categories: the End Call node (the only standalone action node on the canvas), builtin functions configured on agent nodes, and pre/post actions attached to agent nodes.

End Call node

The only standalone action node type. Terminate the call when the conversation reaches this node. Optionally configure a goodbye message that plays before the call disconnects.

End Call also exists as a builtin function (end_call) on agent nodes, allowing the LLM to end the call mid-conversation without requiring a separate node.

Builtin functions

Builtin functions are configured as function definitions on agent nodes. The LLM can invoke them during a conversation turn.

Function	Description
`end_call`	End the call. The LLM triggers this when the conversation is complete.
`tts_say`	Speak a specific message to the caller. Use for scripted lines the LLM decides to deliver.
`forward_call`	Transfer the call to another phone number. Configure with a `phoneNumber` parameter.

forward_call

Add forward_call as a function on any agent node. Configure with phoneNumber to transfer the call. Use cases include escalating to a human agent, routing to a department, or transferring to an on-call number.

Pre/post actions

Pre/post actions execute automatically when an agent node is entered (pre) or exited (post). They run without LLM involvement.

Action type	Description
`tts_say`	Speak a scripted message. Supports Handlebars template variables for dynamic content.
`play_audio`	Play audio from a URL.
`wait`	Pause for a specified duration in milliseconds.
`webhook`	Send an HTTP request to an external service. Configure with `url` and `method`.

Webhook configuration

Setting	Description
URL	The endpoint to call
Method	HTTP method (GET, POST, PUT, PATCH, DELETE)

Webhooks can also be configured as custom function execution targets on agent nodes, allowing the LLM to trigger them during conversation.