Send to Channel Node

The send-to-channel node queues a broadcast instruction to deliver a message to a channel. It supports template interpolation so you can dynamically compute target channels and payloads from event data.

When to Use

Route a processed message to one or more channels
Fan out an event to a different channel than the one it arrived on
Build dynamic per-user or per-entity channels (e.g. user-{{data.userId}})

Configuration

Field	Type	Required	Default	Description
`channel`	string	Yes	—	Target channel name. Supports `{{path}}` interpolation
`message`	string	Yes	—	Message payload. Supports `{{path}}` interpolation. Can be a JSON string
`event`	string	No	Inherited from incoming event	Event name to broadcast

Template Interpolation

Use {{path}} syntax to inject values from the message context:

Template	Resolves to
`{{data.field}}`	A field from the message payload
`{{metadata.event}}`	The incoming event name
`{{metadata.appId}}`	The app ID
`{{metadata.channel}}`	The originating channel

Nested paths work too: {{data.user.id}}.

Examples

Broadcast to the same channel

{
  "channel": "notifications",
  "message": "{{data.text}}"
}

Fan out to a user-specific channel

{
  "channel": "user-{{data.userId}}",
  "message": "{\"status\": \"updated\", \"payload\": \"{{data.payload}}\"}",
  "event": "status-update"
}

Send a JSON object message

Set message to a JSON string; subscribers will receive the decoded object:

{
  "channel": "admin-alerts",
  "message": "{\"level\": \"warn\", \"source\": \"{{metadata.channel}}\"}",
  "event": "alert"
}

Broadcast Timing

The broadcast instruction is collected during pipeline execution. All queued broadcasts fire after the pipeline completes successfully. If any node fails before this one, no broadcast is sent.

Multiple send-to-channel nodes in the same flow are all executed; each produces an independent broadcast.

Next Steps

Transform Node — reshape data before broadcasting
Filter Node — conditionally block broadcasts
Channel Types — understand public, private, and presence channels

Send to Channel Node

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