Github repository Event Notification to Slack & Email

Learn how to listen to the repository webhook event from Github to trigger a notification workflow in MagicBell.

Event payload

Sample payload for the repository event.

{
  "action": "created",
  "organization": {
    "avatar_url": "https://avatars.githubusercontent.com/u/111111",
    "description": "Building great software",
    "id": 111111,
    "login": "acme"
  },
  "repository": {
    "created_at": "2025-01-16T10:00:00Z",
    "default_branch": "main",
    "description": "A brand new project for exciting features",
    "fork": false,
    "forks_count": 0,
    "full_name": "acme/new-project",
    "html_url": "https://github.com/acme/new-project",
    "id": 999888777,
    "name": "new-project",
    "node_id": "R_kgDOABC123",
    "owner": {
      "avatar_url": "https://avatars.githubusercontent.com/u/111111",
      "html_url": "https://github.com/acme",
      "id": 111111,
      "login": "acme",
      "type": "Organization"
    },
    "private": false,
    "pushed_at": null,
    "stargazers_count": 0,
    "updated_at": "2025-01-16T10:00:00Z",
    "visibility": "public",
    "watchers_count": 0
  },
  "sender": {
    "avatar_url": "https://avatars.githubusercontent.com/u/123456",
    "html_url": "https://github.com/admin-user",
    "id": 123456,
    "login": "admin-user",
    "node_id": "MDQ6VXNlcjEyMzQ1Ng==",
    "type": "User"
  }
}

Connect Github to MagicBell to receive events and trigger workflows. This guide uses the MagicBell CLI.

Add the Github integration

Save your Github webhook signing secret in MagicBell. See GitHub webhooks.

magicbell integration save_github \
  --data '{"webhook_signing_secret":"your_secret_here"}'

Copy the ID from the response and use it to build your webhook URL:

https://api.magicbell.com/v2/integrations/github/webhooks/incoming/{id}

Setup the webhook

Setup a webhook in Github with the URL from the last step.
Select the repository event.
If you already have a webhook configured, make sure it includes this event.

Add a workflow

Create a workflow that triggers automatically when Github sends this event. Use liquid templates to access fields in your workflow.

Workflow key

Use this key to trigger the workflow when Github sends a repository event:

integration.github.repository

Filter by action: GitHub sends the event type in the header and the action in the payload body. Use an if condition to filter for the created action:

"if": "payload.action == 'created'"

Example workflow

Announce new repositories to the organization.

{
  "key": "integration.github.repository.created",
  "steps": [
    {
      "command": "broadcast",
      "input": {
        "action_url": "{{payload.repository.html_url}}",
        "content": "{{payload.sender.login}} created repository {{payload.repository.full_name}}. {{payload.repository.description}}",
        "overrides": {
          "providers": {
            "slack": {}
          }
        },
        "recipients": [
          {
            "external_id": "engineering-team"
          }
        ],
        "title": "New repository: {{payload.repository.name}}"
      }
    }
  ]
}

Save with the CLI

Use the MagicBell CLI to save this workflow to your project. You can also use the Workflows API endpoint instead.

magicbell workflow save \
  --data '{"key":"integration.github.repository.created","steps":[{"command":"broadcast","input":{"action_url":"{{payload.repository.html_url}}","content":"{{payload.sender.login}} created repository {{payload.repository.full_name}}. {{payload.repository.description}}","overrides":{"providers":{"slack":{}}},"recipients":[{"external_id":"engineering-team"}],"title":"New repository: {{payload.repository.name}}"}}]}'

Test the workflow

Use the Github CLI to trigger test events and verify your workflow executes correctly.

1. Trigger a test event

Use the GitHub CLI to forward webhook events from your repository to MagicBell:

gh webhook forward \
  --events=repository \
  --url=https://api.magicbell.com/v2/integrations/github/webhooks/incoming/{id}

2. Verify the workflow ran

Check that MagicBell received the event and executed the workflow:

magicbell workflow list_runs --workflow_key integration.github.repository.created

3. Debug issues

If the workflow failed or you need more details, fetch the run to see step-by-step execution:

magicbell workflow fetch_run --run_id {run_id}

Other repository notification workflows

repository_dispatch

Track custom webhook events triggered via repository dispatch.

repository_import

Notify when repository imports complete.

repository_vulnerability_alert

Notify when vulnerability alerts are created for repository dependencies.

View all Github workflows →