How to Post a Slack Message When a New User Registers in WordPress

A new member is worth a moment of attention, and a Slack channel is where your team already looks. Zapify posts to it the instant someone registers, with the free A user registers trigger and the Send a Slack message action. Slack is a Zapify PRO integration.

What this automation does

The automation is one trigger plus one action:

• Trigger: A user registers (WP_USER_REGISTERS, WordPress)
• Action: Send a Slack message (SLACK_SEND_MESSAGE, Slack)

When a new account is created, Zapify posts a short message to the Slack channel you choose.

Before you start

• A Slack app for your workspace with a bot user OAuth token (starts xoxb-), created under OAuth & Permissions in your Slack app's settings — see Slack's authentication basics if you're setting one up for the first time. The bot needs the chat:write scope.
• The bot invited into the channel you want it to post to — Slack won't let it post to a channel it isn't a member of.

How to build the automation

Step 1: Connect Slack

1. Go to Settings → Connections and click Add New.

2. Choose Slack, paste in the bot user OAuth token, and name the connection something like Sales Slack.

3. Save.

See Connections for how this screen works generally.

Step 2: Create a new automation

1. In the WordPress admin, go to Zapify → Automations.
2. Click Add New to open the builder.
3. Name it clearly, such as Announce new members in Slack.

Step 3: Add the "A user registers" trigger

1. Click Add Trigger.

2. Choose WordPress as the app.

3. Select A user registers.

Step 4: Add the "Send a Slack message" action

1. Click Add Action.

2. Choose Slack as the app.

3. Select Send a Slack message.

Step 5: Configure the action

Field	Required	What it does
Connection	Yes	The Slack connection you set up in Step 1.
Channel	Yes	A channel name (#members) or ID. The bot must already be a member.
Message	Yes	The text to post. Insert user tokens to say who signed up.
Post as	No	Overrides the bot's display name for this message. Leave empty to use the bot's own name.

For example:

• Channel: #members
• Message: New member: {{trigger:USER_DISPLAY_NAME}} ({{trigger:USER_EMAIL}})

Step 6: Set the steps Live and save

Each trigger and action has its own Live / Off / Draft switch. A new automation starts as a Draft and does nothing until its steps are Live.

1. Set the trigger and every action to Live.
2. Click Save.

Step 7: Test it

Register a test account. The message should appear in the channel within a minute, or open Zapify → Logs to see what Slack answered.

Tokens you can use

Token	What it holds
User email	The new account's email address.
Display name / First name / Last name	Name parts, if set.
Username	The login name.
Registration date	When they registered.

Conclusion

With the free A user registers trigger and the Send a Slack message action, your team hears about every new member as it happens. For sales instead, see posting a Slack message when a product is purchased.

FAQs

Is this free in Zapify?

The trigger is free. The Slack action needs an active Zapify PRO licence and a Connection.

Why does Slack say the channel was not found?

The bot has to be invited into the channel first. Type /invite @YourBot in the channel, then run the automation again.

Could this be noisy?

On a busy site, yes. Post to a quiet channel of its own, or add a condition so only certain roles are announced. See Filters and conditions.

Do I need to write any code?

No. Everything is set up visually.