Signl4

Overview

Use this skill to interact with SIGNL4 via its inbound webhook:

• Send alerts to a SIGNL4 team
• Close (resolve) alerts using an external correlation ID

Authentication is handled via the team secret embedded in the webhook URL.

Webhook documentation: https://docs.signl4.com/integrations/webhook/webhook.html

Required configuration

The following environment variable must be set:

• SIGNL4_TEAM_SECRET – the SIGNL4 team secret used in the webhook URL

Optional (advanced):

• SIGNL4_WEBHOOK_BASE – defaults to https://connect.signl4.com/webhook

Inputs to gather from the user

When sending an alert

Required:

• Title – short summary
• Message – detailed description
• External ID – strongly recommended (required to close the alert later)

Optional:

• Service (X-S4-Service)
• Alerting scenario (X-S4-AlertingScenario – e.g. single_ack, multi_ack, emergency)
• Location (X-S4-Location, format: "lat,long")

When closing an alert

Required:

• External ID – must match the ID used when the alert was created

How to send an alert

Rules

• Always include X-S4-ExternalID if the alert might need to be closed later.
• Use X-S4-Status: "new" to create an alert.

Command template

Set the webhook URL:

WEBHOOK_URL="${SIGNL4_WEBHOOK_BASE:-https://connect.signl4.com/webhook}/${SIGNL4_TEAM_SECRET}"

Send the alert:

curl -sS -X POST "$WEBHOOK_URL" \
  -H "Content-Type: application/json" \
  -d '{
    "Title": "<TITLE>",
    "Message": "<MESSAGE>",
    "X-S4-ExternalID": "<EXTERNAL_ID>",
    "X-S4-Status": "new",
    "X-S4-Service": "<OPTIONAL_SERVICE>",
    "X-S4-AlertingScenario": "<OPTIONAL_SCENARIO>",
    "X-S4-Location": "<OPTIONAL_LAT_LONG>",
    "X-S4-SourceSystem": "OpenClaw"
  }'

What to report back

• Confirm that the alert was sent
• Repeat key details:
  • Title
  • External ID
  • Optional service/scenario

If the request fails:

• Check that SIGNL4_TEAM_SECRET is set and correct
• Ensure JSON fields are valid

How to close (resolve) an alert

Rules

To close an alert, you must:

• Use the same External ID as when the alert was created
• Set X-S4-Status to resolved

Command template

curl -sS -X POST "$WEBHOOK_URL" \
  -H "Content-Type: application/json" \
  -d '{
    "X-S4-ExternalID": "<EXTERNAL_ID>",
    "X-S4-Status": "resolved"
  }'

What to report back

• Confirm the resolve request was sent for the given External ID
• If the External ID is missing, ask the user for it

Security notes

• Treat SIGNL4_TEAM_SECRET as confidential
• Never print or echo the team secret in responses or logs