How to Send Asana Task Assignments to Slack with Zapier

zapier.com > Dashboard > Create Zap

Create a new Zap and name it

Log into zapier.com and click the orange 'Create Zap' button in the left sidebar. Give your Zap a descriptive name at the top — something like 'Asana Task Assigned → Slack Notify'. Naming it now saves confusion when you have a dozen Zaps running. You'll land on the trigger configuration screen.

1. 1Click 'Create Zap' in the left sidebar
2. 2Click the untitled name field at the top and type 'Asana Task Assigned → Slack Notify'
3. 3Click the 'Trigger' box to begin configuration

Zap Editor > Trigger > App & Event

Set Asana as the trigger app

Search for 'Asana' in the trigger app search field and select it. You'll then choose a trigger event — select 'New Task Assigned to You' if you're building a personal notification Zap, or 'New Task in Project' if you want to catch all assignments across a project. For team-wide notifications, use 'New Task in Project'. This is an instant trigger backed by Asana's webhooks, so it fires within seconds of the assignment.

1. 1Type 'Asana' in the app search field
2. 2Click the Asana logo to select it
3. 3Click the 'Event' dropdown
4. 4Select 'New Task in Project'
5. 5Click 'Continue'

Zap Editor > Trigger > Account

Connect your Asana account

Click 'Sign in to Asana' on the account connection screen. A pop-up window opens asking you to authorize Zapier. Log in with the Asana account that has access to the relevant workspace and projects. Once authorized, you'll see a green checkmark and the account email displayed. If your organization uses SSO, the pop-up will redirect through your identity provider first.

1. 1Click 'Sign in to Asana'
2. 2Authorize Zapier in the Asana pop-up window
3. 3Return to Zapier and confirm the account email is correct
4. 4Click 'Continue'

Zap Editor > Trigger > Configure

Select the Asana workspace and project

Two dropdowns appear: Workspace and Project. Select the Asana workspace your team uses, then select the specific project you want to monitor. You cannot monitor all projects at once with a single Zap — each project needs its own trigger or you need to duplicate the Zap per project. Pick the highest-priority project first.

1. 1Click the 'Workspace' dropdown and select your team workspace
2. 2Click the 'Project' dropdown and select the target project
3. 3Click 'Continue'

Zap Editor > Trigger > Test

Test the Asana trigger

Click 'Test trigger' to pull in a recent task from the selected project. Zapier fetches the last task created or modified. You'll see a payload of fields including task name, assignee name, assignee email, due date, priority (stored as a custom field in Asana), notes, and the task permalink URL. Confirm the data looks right before moving on — the fields shown here are what you'll map to Slack.

1. 1Click 'Test trigger'
2. 2Wait 5–10 seconds for Zapier to fetch a sample task
3. 3Expand the result to review all available fields
4. 4Confirm 'Assignee Name', 'Task Name', and 'Due Date' are present
5. 5Click 'Continue with selected record'

Zap Editor > + > Filter by Zapier

Add a filter step for priority changes (optional but recommended)

If you only want to notify on priority changes — not every new task — add a Filter step between the trigger and the Slack action. Click the '+' button below the trigger, select 'Filter by Zapier', and set the condition to 'Priority contains High' or whichever value your Asana custom field uses. Without this filter, every new task in the project fires a Slack message, which gets noisy fast on active projects.

1. 1Click the '+' icon below the Asana trigger step
2. 2Select 'Filter' from the action type list
3. 3Choose the 'Priority' custom field from the field dropdown
4. 4Set the condition to '(Text) Contains'
5. 5Type the priority value (e.g., 'High') in the value field
6. 6Click 'Continue'

Zap Editor > Action > App & Event

Add Slack as the action app

Click the '+' button below your last step and search for 'Slack'. Select it and then choose an action event. Use 'Send Direct Message' to notify the assignee personally, or 'Send Channel Message' to post in a shared team channel like #dev-tasks. For team visibility, 'Send Channel Message' is usually the right call — individual DMs can get buried.

1. 1Click the '+' icon below the filter step
2. 2Type 'Slack' in the app search field
3. 3Click the Slack logo
4. 4Click the 'Event' dropdown
5. 5Select 'Send Channel Message' or 'Send Direct Message'
6. 6Click 'Continue'

Zap Editor > Action > Account

Connect your Slack workspace

Click 'Sign in to Slack' and authorize Zapier through the Slack OAuth screen. Choose the correct workspace from the dropdown — if your organization has multiple Slack workspaces, make sure you pick the one your team actually uses. The connected account needs permission to post in the target channel. A bot user is created in your Slack workspace called 'Zapier'.

1. 1Click 'Sign in to Slack'
2. 2Select your workspace from the Slack authorization screen
3. 3Click 'Allow' to grant Zapier posting permissions
4. 4Confirm the workspace name appears in Zapier
5. 5Click 'Continue'

Zap Editor > Action > Configure

Configure the Slack message content

Now map your Asana task fields into the Slack message. Set the Channel field to the target channel (e.g., #dev-tasks) or map the Assignee Email field to send a DM directly to the right person. Build the message text using Asana's dynamic fields — click the '+' icon in the message field to insert variables. A clear message format covers: who was assigned, what the task is, when it's due, the priority level, and a direct link to the task.

1. 1Click the 'Channel' field and select your target Slack channel or type the assignee email for a DM
2. 2Click the 'Message Text' field
3. 3Type your message template and insert dynamic fields using the '+' button
4. 4Insert: Assignee Name, Task Name, Due Date, Priority (custom field), and Task Permalink URL
5. 5Optionally set 'Send as Bot' to true and customize the bot name to 'Asana Bot'
6. 6Click 'Continue'

📬 New entry: {{1.name}}
Email: {{1.email}}
Details: {{1.description}}

Zap Editor > Action > Test

Test the Slack action

Click 'Test action' to send a real message to your Slack channel using the sample task data from step 5. Switch to Slack and confirm the message arrived in the correct channel with all fields populated correctly. Check that the task name, assignee name, due date, and link all appear. If a field shows blank, go back and re-map it — blank fields usually mean the sample task didn't have that field populated.

1. 1Click 'Test action'
2. 2Open Slack and navigate to the target channel or DM
3. 3Confirm the test message arrived with correct task data
4. 4Verify the task link is clickable and opens the correct Asana task
5. 5Return to Zapier and click 'Continue'

Zap Editor > Publish

Publish the Zap

Click 'Publish Zap' to turn it on. The Zap status changes from Draft to On. From this point, every new task added to the monitored Asana project — or that matches your filter — triggers a Slack notification within 1–2 minutes. Check the Zap History tab in Zapier over the next hour to confirm runs are succeeding. The first real trigger may take up to 5 minutes while Asana's webhook registers.

1. 1Click the 'Publish Zap' button in the top right corner
2. 2Confirm the status indicator switches to 'On' (shown in green)
3. 3Navigate to 'Zap History' in the left sidebar
4. 4Wait for the first real Asana event and confirm it shows as 'Success'

Paste this into a 'Code by Zapier' step placed between the Asana trigger and the Slack action. It formats the due date into a readable string, maps priority levels to emoji indicators, and truncates the task notes to 150 characters so the Slack message stays clean. Add the Code step by clicking '+', selecting 'Code by Zapier', and choosing 'Run Javascript'.

// Input data from Asana trigger fields
const taskName = inputData.taskName || 'Untitled Task';
const assigneeName = inputData.assigneeName || 'Unassigned';

// Input data from Asana trigger fields
const taskName = inputData.taskName || 'Untitled Task';
const assigneeName = inputData.assigneeName || 'Unassigned';
const rawDueDate = inputData.dueDate || '';
const priority = inputData.priority || 'None';
const notes = inputData.notes || '';
const permalink = inputData.permalink || '';
const projectName = inputData.projectName || 'Unknown Project';

// Map priority to emoji
const priorityEmoji = {
  'High': '🔴',
  'Medium': '🟡',
  'Low': '🟢',
  'None': '⚪'
};
const emoji = priorityEmoji[priority] || '⚪';

// Format due date from YYYY-MM-DD to readable format
let formattedDate = 'No due date';
if (rawDueDate) {
  const parts = rawDueDate.split('-');
  const dateObj = new Date(Date.UTC(parts[0], parts[1] - 1, parts[2]));
  formattedDate = dateObj.toLocaleDateString('en-US', { month: 'short', day: 'numeric', year: 'numeric', timeZone: 'UTC' });
}

// Truncate notes to 150 characters
const truncatedNotes = notes.length > 150
  ? notes.substring(0, 147) + '...'
  : notes;

// Build final Slack message
const message = [
  `${emoji} *New task assigned to ${assigneeName}*`,
  `*Task:* ${taskName}`,
  `*Priority:* ${priority}`,
  `*Due:* ${formattedDate}`,
  `*Project:* ${projectName}`,
  truncatedNotes ? `*Notes:* ${truncatedNotes}` : null,
  `👉 ${permalink}`
].filter(Boolean).join('\n');

output = [{ message, formattedDate, emoji, truncatedNotes }];