Webhook to Slack
Build a workflow that receives an external event, formats it, and sends a Slack alert.
Use this when another product can send HTTP events and your team wants a structured Slack notification with run history in B3OS.
Pattern
textmanual/webhook trigger -> format -> Slack message -> optional webhook response
Webhook to Slack flow
Build Steps
1
Create a manual trigger
Use the manual trigger with an input schema that matches the event body you expect to receive.
2
Format the alert
Add the format action and reference trigger fields such as {{$trigger.body.customerId}}, {{$trigger.body.amount}}, and {{$trigger.body.status}}.
3
Send the Slack message
Add a Slack message action, attach the Slack connector, and use the formatted output as message text.
4
Publish and copy the webhook URL
Publish the workflow, then use the workflow run URL or public execution URL appropriate for your integration surface.
Example Nodes
json{ "nodes": { "root": { "type": "manual", "payload": { "inputSchema": { "type": "object", "required": ["customerId", "amount"], "properties": { "customerId": { "type": "string" }, "amount": { "type": "number" }, "status": { "type": "string" } } } }, "children": ["format_alert"] }, "format_alert": { "type": "format", "payload": { "data": { "customerId": "{{$trigger.body.customerId}}", "amount": "{{$trigger.body.amount}}", "status": "{{$trigger.body.status}}" }, "template": "Customer {{@customerId}} status {{@status}} for {{@amount}}" }, "children": ["send_slack"] }, "send_slack": { "type": "slack-send-message", "connector": { "type": "slack", "id": "conn_slack" }, "payload": { "channelId": "C0123456789", "text": "{{$nodes.format_alert.result.formatted}}" }, "children": [] } }}
Production Checks
| Check | Requirement |
|---|---|
| Input schema matches the sender | Required fields are explicit and optional fields have fallback behavior. |
| Connector is attached | The Slack connector belongs to the same organization and has access to the target channel. |
| Failure path is visible | Add an execution webhook or monitoring alert for failed deliveries. |