How to Sync Slack Members to Copper Contacts with n8n

api.slack.com/apps > Your App > Event Subscriptions

Create a Slack App and Enable Event Subscriptions

Go to api.slack.com/apps and click 'Create New App', then choose 'From scratch'. Name it something like 'n8n Contact Sync' and select your workspace. Once created, navigate to 'Event Subscriptions' in the left sidebar and toggle 'Enable Events' to On. You'll need to paste your n8n webhook URL here — set that up in Step 2 first, then come back.

1. 1Go to api.slack.com/apps and click 'Create New App'
2. 2Choose 'From scratch', name the app, select your workspace, click 'Create App'
3. 3In the left sidebar click 'Event Subscriptions'
4. 4Toggle 'Enable Events' to On — leave the Request URL blank for now

This Code node runs between the Slack users.info HTTP Request node and the Copper duplicate-check node. It normalizes all profile fields, sets safe fallbacks for missing data, and formats the phone and email into the array-of-objects structure Copper's API requires — so your later HTTP Request nodes can just reference clean fields instead of building nested JSON inside expressions.

// Code node: Normalize Slack profile for Copper API
// Place between: HTTP Request (Slack users.info) → HTTP Request (Copper search)
const items = $input.all();

// Code node: Normalize Slack profile for Copper API
// Place between: HTTP Request (Slack users.info) → HTTP Request (Copper search)

const items = $input.all();
const results = [];

for (const item of items) {
  const user = item.json.user;
  const profile = user?.profile ?? {};

  // Normalize all fields with safe fallbacks
  const fullName = (user?.real_name || user?.name || '').trim();
  const email = (profile?.email || '').toLowerCase().trim();
  const phone = (profile?.phone || '').trim();
  const title = (profile?.title || '').trim();
  const slackHandle = (profile?.display_name || user?.name || '').trim();
  const slackUserId = user?.id || '';

  // Skip if no email — Copper requires it and the contact would be useless
  if (!email) {
    console.log(`Skipping user ${slackUserId}: no email in Slack profile`);
    continue;
  }

  // Build Copper-formatted arrays
  const copperEmails = [{ email, category: 'work' }];
  const copperPhones = phone ? [{ number: phone, category: 'mobile' }] : [];

  // Build the details string for Copper's notes field
  const details = [
    slackHandle ? `Slack: @${slackHandle}` : null,
    `Added via channel join automation on ${new Date().toISOString().split('T')[0]}`
  ].filter(Boolean).join(' | ');

  results.push({
    json: {
      fullName,
      email,           // plain string for duplicate search
      copperEmails,    // array for Copper create API
      copperPhones,    // array for Copper create API
      title,
      slackHandle,
      slackUserId,
      details,
      tags: ['slack-sync']
    }
  });
}

return results;

n8n > New Workflow > + Node > Webhook

Set Up the n8n Webhook Trigger Node

Open your n8n instance, click '+ New Workflow', then click the '+' node button and search for 'Webhook'. Select the Webhook node and set the HTTP Method to POST. Copy the 'Test URL' shown in the node panel — you'll paste this into Slack in the next step. Leave the node in 'Listen for Test Event' mode for now so Slack can verify it.

1. 1Click '+ New Workflow' in your n8n dashboard
2. 2Click the '+' button to add the first node
3. 3Search for 'Webhook' and select it
4. 4Set HTTP Method to POST
5. 5Click 'Listen for Test Event' and copy the Test URL shown

api.slack.com/apps > Your App > Event Subscriptions > Subscribe to Bot Events

Register the Webhook URL in Slack and Subscribe to Channel Join Events

Go back to your Slack app's Event Subscriptions page and paste the n8n Test URL into the Request URL field. Slack will immediately send a challenge POST — n8n will auto-respond and Slack will show a green 'Verified' checkmark. Scroll down to 'Subscribe to bot events' and add the event 'member_joined_channel'. Click 'Save Changes'.

1. 1Paste the n8n Test URL into the 'Request URL' field
2. 2Wait for the green 'Verified' checkmark to appear
3. 3Click 'Add Bot Event' under 'Subscribe to Bot Events'
4. 4Search for and select 'member_joined_channel'
5. 5Click 'Save Changes' at the bottom of the page

api.slack.com/apps > Your App > OAuth & Permissions > Bot Token Scopes

Install the Slack App to Your Workspace and Invite It to Target Channels

In the Slack API dashboard, go to 'OAuth & Permissions' in the left sidebar. Under 'Bot Token Scopes' add the scopes: 'channels:read', 'users:read', and 'users:read.email'. Click 'Install to Workspace' at the top of the page and authorize. Copy the Bot User OAuth Token — it starts with xoxb-. Then in Slack itself, go to each channel you want to monitor and type '/invite @YourAppName'.

1. 1Click 'OAuth & Permissions' in the left sidebar
2. 2Under 'Bot Token Scopes' click 'Add an OAuth Scope'
3. 3Add 'channels:read', 'users:read', and 'users:read.email'
4. 4Click 'Install to Workspace' and click 'Allow'
5. 5Copy the 'Bot User OAuth Token' (xoxb-...)
6. 6In Slack, open each target channel and type '/invite @YourAppName'

n8n Workflow Editor > + Node > HTTP Request

Add an HTTP Request Node to Fetch the User's Full Slack Profile

The 'member_joined_channel' event only gives you a user ID, not name or email. Add an HTTP Request node after the Webhook node to call the Slack API and get the full profile. Set the method to GET, the URL to 'https://slack.com/api/users.info', and add a query parameter 'user' with value '{{ $json.body.event.user }}'. In the Authentication section, select 'Header Auth', set the header name to 'Authorization', and the value to 'Bearer xoxb-your-token'.

1. 1Click '+' after the Webhook node to add a new node
2. 2Search for 'HTTP Request' and select it
3. 3Set Method to GET
4. 4Set URL to 'https://slack.com/api/users.info'
5. 5Under 'Query Parameters' add key 'user' with value '{{ $json.body.event.user }}'
6. 6Under 'Authentication' select 'Header Auth', name: Authorization, value: Bearer xoxb-your-token

n8n Workflow Editor > + Node > HTTP Request (Copper Search)

Add a Copper Search Node to Check for Duplicate Contacts

Before creating a contact in Copper, check if one already exists with that email. Add another HTTP Request node. Set the method to POST, URL to 'https://api.copper.com/developer_api/v1/people/search', and add three headers: 'X-PW-AccessToken' with your Copper API key, 'X-PW-Application' with value 'developer_api', and 'Content-Type' with 'application/json'. In the body, set JSON body to '{ "emails": [{ "email": "{{ $node["HTTP Request"].json.user.profile.email }}" }] }'.

1. 1Click '+' after the Slack profile fetch node
2. 2Add another HTTP Request node
3. 3Set Method to POST
4. 4Set URL to 'https://api.copper.com/developer_api/v1/people/search'
5. 5Add headers: X-PW-AccessToken, X-PW-Application (developer_api), Content-Type (application/json)
6. 6Set the JSON body to search by email as shown in the detail

n8n Workflow Editor > + Node > IF

Add an IF Node to Skip Existing Contacts

Add an IF node after the Copper search. Set the condition to check the length of the search results array. In the left value field enter '{{ $json.length }}', set the operator to 'Equal', and the right value to '0'. The TRUE branch means no contact exists — route this to the create step. The FALSE branch means a duplicate — connect it to a No Operation node or simply leave it unconnected to stop execution.

1. 1Click '+' after the Copper search node
2. 2Search for 'IF' and select it
3. 3Set left value to '{{ $json.length }}'
4. 4Set operator to 'Equal'
5. 5Set right value to 0
6. 6Connect the TRUE output to the next step (contact creation)
7. 7Connect or leave the FALSE output unconnected

n8n Workflow Editor > IF Node (true branch) > + Node > HTTP Request (Copper Create)

Add an HTTP Request Node to Create the Copper Contact

Connect an HTTP Request node to the TRUE branch of the IF node. Set method to POST, URL to 'https://api.copper.com/developer_api/v1/people'. Use the same three Copper headers from Step 6. In the JSON body, map the Slack profile fields to Copper's expected format — name, email, phone, and title. Reference the Slack profile data from the earlier HTTP Request node using expressions like '{{ $node["HTTP Request"].json.user.real_name }}'.

1. 1Click the TRUE output of the IF node and add an HTTP Request node
2. 2Set Method to POST, URL to 'https://api.copper.com/developer_api/v1/people'
3. 3Add the same three Copper headers as Step 6
4. 4Set the JSON body using the field mapping in the Field Mapping section below
5. 5Click 'Test Step' to verify a contact is created

n8n Workflow Editor > Between HTTP Request (Slack) and HTTP Request (Copper Search) > + Node > Code

Add a Code Node to Handle Missing Profile Fields Gracefully

Slack profiles are inconsistently filled out — phone and title are often blank. Add a Code node between the Slack profile fetch (Step 5) and the duplicate check (Step 6) to normalize the data and set fallback values. This prevents the Copper API call from failing due to null values. Paste the code from the Pro Tip section below into the Code node's 'JavaScript' editor.

1. 1Click the connection line between the Slack fetch node and the Copper search node
2. 2Click '+' to insert a new node
3. 3Search for 'Code' and select it
4. 4Set the language to 'JavaScript'
5. 5Paste the pro tip code into the editor
6. 6Click 'Test Step' to confirm the output shows normalized fields

This Code node runs between the Slack users.info HTTP Request node and the Copper duplicate-check node. It normalizes all profile fields, sets safe fallbacks for missing data, and formats the phone and email into the array-of-objects structure Copper's API requires — so your later HTTP Request nodes can just reference clean fields instead of building nested JSON inside expressions.

// Code node: Normalize Slack profile for Copper API
// Place between: HTTP Request (Slack users.info) → HTTP Request (Copper search)
const items = $input.all();

// Code node: Normalize Slack profile for Copper API
// Place between: HTTP Request (Slack users.info) → HTTP Request (Copper search)

const items = $input.all();
const results = [];

for (const item of items) {
  const user = item.json.user;
  const profile = user?.profile ?? {};

  // Normalize all fields with safe fallbacks
  const fullName = (user?.real_name || user?.name || '').trim();
  const email = (profile?.email || '').toLowerCase().trim();
  const phone = (profile?.phone || '').trim();
  const title = (profile?.title || '').trim();
  const slackHandle = (profile?.display_name || user?.name || '').trim();
  const slackUserId = user?.id || '';

  // Skip if no email — Copper requires it and the contact would be useless
  if (!email) {
    console.log(`Skipping user ${slackUserId}: no email in Slack profile`);
    continue;
  }

  // Build Copper-formatted arrays
  const copperEmails = [{ email, category: 'work' }];
  const copperPhones = phone ? [{ number: phone, category: 'mobile' }] : [];

  // Build the details string for Copper's notes field
  const details = [
    slackHandle ? `Slack: @${slackHandle}` : null,
    `Added via channel join automation on ${new Date().toISOString().split('T')[0]}`
  ].filter(Boolean).join(' | ');

  results.push({
    json: {
      fullName,
      email,           // plain string for duplicate search
      copperEmails,    // array for Copper create API
      copperPhones,    // array for Copper create API
      title,
      slackHandle,
      slackUserId,
      details,
      tags: ['slack-sync']
    }
  });
}

return results;

n8n Workflow Editor > Webhook Node > Production URL | api.slack.com > Event Subscriptions

Switch to Production URL and Activate the Workflow

Before activating, go back to your Webhook node and copy the Production URL (found in the node panel under 'Production URL' — it does not contain '/webhook-test/'). Go to api.slack.com/apps, navigate to Event Subscriptions, and replace the Test URL with the Production URL. Slack will re-verify it. Then return to n8n and click the 'Activate' toggle in the top right of the workflow editor.

1. 1Open the Webhook node panel and copy the Production URL
2. 2Go to api.slack.com/apps > Your App > Event Subscriptions
3. 3Replace the Test URL with the Production URL
4. 4Confirm the green 'Verified' badge reappears
5. 5Return to n8n and click the 'Inactive' toggle to switch the workflow to 'Active'

n8n > Executions | Copper > People

Test End-to-End with a Real Channel Join

Have a team member or a test account join one of the monitored Slack channels. Wait up to 30 seconds, then check n8n's Execution Log (left sidebar > Executions) to confirm a run was triggered and all nodes completed with green checkmarks. Then open Copper, go to People, and confirm the new contact appears with the correct name, email, phone, and title. Check that no duplicate was created if you run the test twice.

1. 1Have a user join a monitored Slack channel
2. 2In n8n, click 'Executions' in the left sidebar
3. 3Confirm a new execution appears and all nodes show green
4. 4Open Copper and navigate to People
5. 5Search for the test user's email and confirm the contact record is correct