How to Send Wrike Milestone Alerts to Slack with n8n

n8n Dashboard > Workflows > New Workflow

Create a new n8n workflow

Log into your n8n instance (cloud at app.n8n.cloud or self-hosted). Click the orange 'New Workflow' button in the top right of the Workflows dashboard. Give it a clear name — something like 'Wrike Milestone → Slack Celebration'. You'll land on an empty canvas with a single 'Add first step' prompt in the center.

1. 1Log in to your n8n instance
2. 2Click 'New Workflow' in the top right
3. 3Click the pencil icon next to 'My Workflow' and rename it to 'Wrike Milestone → Slack Celebration'
4. 4Click the canvas center prompt 'Add first step'

Canvas > Add Node > Webhook

Add the Webhook trigger node

In the node picker, search for 'Webhook' and select it. This node will receive real-time POST requests from Wrike whenever a task status changes. Set the HTTP Method to POST and leave the path as the auto-generated UUID — copy this URL, you'll need it in Wrike. Set Authentication to 'None' for now; you'll lock it down in the production checklist.

1. 1Type 'Webhook' in the node search box
2. 2Click the 'Webhook' node (not HTTP Request)
3. 3Set HTTP Method to 'POST'
4. 4Copy the full Webhook URL shown under 'Webhook URLs > Test URL'

Wrike > Account Settings > Apps & Integrations > Wrike API

Register the webhook in Wrike

Open Wrike in a separate tab. Navigate to your Account settings, then the API section to access Wrike's webhook configuration. You need to create a webhook that fires on task status changes. Wrike webhooks are created via the Wrike API — paste your n8n Production Webhook URL as the hook URL, and set the event filter to 'TaskStatusChanged'. If your team uses the Wrike API app or a third-party Wrike webhook manager, the steps follow the same pattern.

1. 1Open Wrike and go to Account Settings (bottom-left avatar > Settings)
2. 2Click 'Apps & Integrations', then 'Wrike API'
3. 3Generate or copy your Wrike API access token
4. 4Use Wrike's POST /webhooks API endpoint with your n8n URL and event type 'TaskStatusChanged'
5. 5Confirm the webhook appears in GET /webhooks response with status 'active'

n8n Canvas > Webhook Node > Listen for Test Event

Test the webhook with a sample payload

Back in n8n, click your Webhook node and hit 'Listen for Test Event'. Switch to Wrike, mark any milestone task as Completed, then return to n8n. The canvas should show a green data bubble on the Webhook node. Click the node to inspect the incoming JSON — you'll see the task ID, status, project ID, and author fields. This is the data you'll filter and format in later steps.

1. 1Click the Webhook node on the canvas
2. 2Click 'Listen for Test Event' in the node panel
3. 3Switch to Wrike and complete any milestone task
4. 4Return to n8n and wait for the green dot to appear on the Webhook node
5. 5Click the node and review the Input tab to see the raw JSON payload

Canvas > + > IF Node

Add a Filter node to catch only milestone completions

Not every task update should trigger a Slack message — only completed milestones. Add an IF node after the Webhook. Set Condition 1 to check that the incoming status field equals 'Completed'. Set Condition 2 to check that a custom field you've set on Wrike milestone tasks (e.g. a boolean 'isMilestone' field or a specific task type) equals true. Both conditions must pass for the workflow to continue. Anything that fails routes to the False branch, which you can leave empty or connect to a 'No Operation' node.

1. 1Click the '+' connector after the Webhook node
2. 2Search for 'IF' and select the IF node
3. 3Click 'Add Condition', set left value to '{{ $json.body.status }}', operator to 'equals', right value to 'Completed'
4. 4Click 'Add Condition', set left value to '{{ $json.body.taskType }}' or your milestone custom field path, operator to 'equals', right value to 'Milestone'
5. 5Set 'Combine Conditions' to 'AND'

Canvas > + > HTTP Request Node

Fetch full task details from Wrike API

The webhook payload gives you a task ID but not the full task title, assignee name, or project name. Add an HTTP Request node to call the Wrike API and retrieve complete task details. Use a GET request to https://www.wrike.com/api/v4/tasks/{{taskId}} with your Bearer token in the Authorization header. This returns the task title, description, responsible party IDs, and parent folder IDs you'll need for the Slack message.

1. 1Click '+' after the True output of the IF node
2. 2Search for 'HTTP Request' and add it
3. 3Set Method to GET
4. 4Set URL to 'https://www.wrike.com/api/v4/tasks/{{ $json.body.taskId }}'
5. 5Add Header: Authorization = 'Bearer YOUR_WRIKE_API_TOKEN'
6. 6Click 'Execute Node' to verify the response

Canvas > + > HTTP Request Node

Resolve assignee name from Wrike contacts

The task response gives you responsibleIds — a list of user ID strings, not names. Add a second HTTP Request node to call GET https://www.wrike.com/api/v4/contacts/{{responsibleId}} to resolve the first responsible user's name. Extract the firstName and lastName fields from the response. This name will appear in the Slack message so the team knows who closed the milestone.

1. 1Click '+' after the task detail HTTP Request node
2. 2Add another HTTP Request node
3. 3Set Method to GET
4. 4Set URL to 'https://www.wrike.com/api/v4/contacts/{{ $json.data[0].responsibleIds[0] }}'
5. 5Add the same Authorization header with your Wrike token
6. 6Execute the node and confirm firstName and lastName appear in the response

Paste this into the Code node in Step 8. It pulls task title, assignee name, completion date, and permalink from the three upstream HTTP Request nodes, formats the date to a readable string, handles missing assignees gracefully, and returns a single message object ready for the Slack node.

// Code Node: Build Wrike Milestone Celebration Slack Message
// Runs after: Webhook → IF → HTTP Task Details → HTTP Contact Details
const taskData = $node['HTTP Request - Task Details'].json.data[0];

// Code Node: Build Wrike Milestone Celebration Slack Message
// Runs after: Webhook → IF → HTTP Task Details → HTTP Contact Details

const taskData = $node['HTTP Request - Task Details'].json.data[0];
const contactData = $node['HTTP Request - Contact Details'].json.data;

// Resolve assignee name — default to 'the team' if no assignee found
let assigneeName = 'the team';
if (contactData && contactData.length > 0) {
  const contact = contactData[0];
  assigneeName = `${contact.firstName} ${contact.lastName}`.trim();
}

// Format the completion date from ISO 8601 to readable string
const rawDate = taskData.updatedDate || new Date().toISOString();
const completionDate = new Date(rawDate).toLocaleDateString('en-US', {
  year: 'numeric',
  month: 'long',
  day: 'numeric',
});

// Build the task title and permalink
const taskTitle = taskData.title || 'Untitled Milestone';
const permalink = taskData.permalink || '';
const linkLine = permalink ? `\n🔗 ${permalink}` : '';

// Compose the celebration message
const message = [
  `🎉 Milestone crushed! *${taskTitle}* was just completed by ${assigneeName}. Great work, team! 💪`,
  `📅 ${completionDate}${linkLine}`,
].join('\n');

// Return single item — Slack node reads $json.message
return [{ json: { message } }];

Canvas > + > Code Node

Build the celebration message with a Code node

Add a Code node to assemble the final Slack message from all the data you've collected. This is where you compose the emoji-rich celebration text, inject the task title, assignee name, project name, and completion date. The Code node gives you full JavaScript access to all upstream node outputs via $node. Write the output as a single object with a 'message' key that the Slack node will consume.

1. 1Click '+' after the contacts HTTP Request node
2. 2Search for 'Code' and select the Code node (not Function)
3. 3Set Language to 'JavaScript'
4. 4Paste your message-building script into the editor (see Pro Tip below)
5. 5Click 'Execute Node' and verify the output contains a formatted 'message' string

Paste this into the Code node in Step 8. It pulls task title, assignee name, completion date, and permalink from the three upstream HTTP Request nodes, formats the date to a readable string, handles missing assignees gracefully, and returns a single message object ready for the Slack node.

// Code Node: Build Wrike Milestone Celebration Slack Message
// Runs after: Webhook → IF → HTTP Task Details → HTTP Contact Details
const taskData = $node['HTTP Request - Task Details'].json.data[0];

// Code Node: Build Wrike Milestone Celebration Slack Message
// Runs after: Webhook → IF → HTTP Task Details → HTTP Contact Details

const taskData = $node['HTTP Request - Task Details'].json.data[0];
const contactData = $node['HTTP Request - Contact Details'].json.data;

// Resolve assignee name — default to 'the team' if no assignee found
let assigneeName = 'the team';
if (contactData && contactData.length > 0) {
  const contact = contactData[0];
  assigneeName = `${contact.firstName} ${contact.lastName}`.trim();
}

// Format the completion date from ISO 8601 to readable string
const rawDate = taskData.updatedDate || new Date().toISOString();
const completionDate = new Date(rawDate).toLocaleDateString('en-US', {
  year: 'numeric',
  month: 'long',
  day: 'numeric',
});

// Build the task title and permalink
const taskTitle = taskData.title || 'Untitled Milestone';
const permalink = taskData.permalink || '';
const linkLine = permalink ? `\n🔗 ${permalink}` : '';

// Compose the celebration message
const message = [
  `🎉 Milestone crushed! *${taskTitle}* was just completed by ${assigneeName}. Great work, team! 💪`,
  `📅 ${completionDate}${linkLine}`,
].join('\n');

// Return single item — Slack node reads $json.message
return [{ json: { message } }];

Canvas > + > Slack Node > Send Message

Connect the Slack node and configure the message

Add a Slack node after the Code node. Select 'Send Message' as the operation. Connect your Slack credentials (OAuth2 — you'll need to create a Slack app with chat:write scope). Set the Channel field to the target channel ID or name (e.g. #project-wins). Set the Message Text field to '{{ $json.message }}' to pull from the Code node output. Toggle 'Include Link Preview' off to keep the message clean.

1. 1Click '+' after the Code node
2. 2Search for 'Slack' and select the Slack node
3. 3Set Resource to 'Message', Operation to 'Send'
4. 4Click 'Credential for Slack API' and connect your Slack OAuth2 app
5. 5Set Channel to your target channel (e.g. '#project-wins' or paste the channel ID)
6. 6Set Message Text to '{{ $json.message }}'
7. 7Click 'Execute Node' to send a test message

n8n Canvas > Workflow Settings > Error Workflow

Add error handling with an Error Trigger node

Production workflows need to surface failures. Add an Error Trigger node as a separate workflow (or use n8n's built-in error workflow setting). Go to Workflow Settings > Error Workflow and point it to a simple fallback workflow that sends a Slack DM to the workflow owner whenever this workflow fails. This catches Wrike API timeouts, Slack auth failures, or malformed payloads.

1. 1Click the Settings icon (gear) in the top right of the canvas
2. 2Click 'Error Workflow'
3. 3Select an existing error-handler workflow or create a new one with an Error Trigger + Slack DM node
4. 4Save the setting and close the panel

n8n Canvas > Workflow Toggle (top right)

Activate the workflow

Click the toggle in the top right of the canvas to switch the workflow from Inactive to Active. n8n will now listen on the Production Webhook URL permanently. Confirm the Wrike webhook is pointed at the Production URL (not the Test URL). Mark a real milestone complete in Wrike and verify the Slack message fires within 30 seconds. Check the Executions log in n8n to confirm a successful run.

1. 1Click the grey toggle switch in the top right corner of the canvas
2. 2Confirm it turns orange/green and reads 'Active'
3. 3Switch to Wrike and mark a milestone task complete
4. 4Check the target Slack channel for the celebration message
5. 5In n8n, click 'Executions' in the left sidebar to review the run log