The moment it happens

Add sign-ups from your site to Mailchimp

People who fill in your own form are added to your audience with a tag, without a Mailchimp embed.

Runs: The moment it happens
Apps: Mailchimp
AI: Not needed
Access: read+write

Send this to your assistant

Create a ClickRuntime automation: give me a link my website form can send to. When it sends a name and email, add them to my Mailchimp audience with the tag website-signup.

Paste it into your assistant. It tells you what it will send or change before it runs live.

Add to ChatGPT Add to Claude

First time? Adding ClickRuntime to your assistant takes about two minutes.

Why use it

Why teams use this automation

Most sites collect emails through a custom form, a checkout, a booking tool or a no-code page builder, and none of those writes into Mailchimp by itself. So someone copies addresses over by hand on Fridays, a few get missed or mistyped, and the person who signed up on Monday does not receive the welcome email until the following week, if ever.

This gives your form or tool a web address to call. When it posts a name and email, ClickRuntime adds that person to your Mailchimp audience, updating them if they already exist so no duplicates are created, and attaches the tag you choose, for example the form name or lead source. It runs the instant the data arrives.

Developers and site owners whose form has no native Mailchimp connection will find it most useful.

What you get out of it

Signups reach the list immediately
A new reader is in Mailchimp seconds after submitting the form, so a welcome sequence starts while their interest is high. Waiting days for a manual import loses many of those first impressions.
No more copy and paste errors
A typo in an email address means a lost subscriber and sometimes a bounce. Passing the data straight through removes the retyping step where those mistakes happen. Clean data at the start saves cleanup work later in the list.
Existing contacts are updated, not duplicated
Because people are added with an upsert, a returning visitor does not create a second record. Your audience count stays accurate and nobody receives the same campaign twice. Reports then reflect real people instead of repeated rows.
Tags tell you where people came from
Adding a tag on arrival, such as the page or promotion, lets you segment later. You can send a webinar follow-up only to webinar registrants without cleaning a spreadsheet first.
Works with tools that lack a Mailchimp option
Any form builder, checkout or script that can send a web request can feed your audience. You are not limited to the handful of tools that have a built-in connector.

How it works

What happens, step by step

When someone signs up on your website, ClickRuntime receives their details straight away.
It adds them to your Mailchimp audience, or updates them if they are already there.
It tags them, for example website-signup, so you know where they came from.

Before it runs live

Connect Mailchimp
Paste your automation's link into the other app's webhook settings

What you get

RunsThe moment it happens

Add sign-ups from your site to Mailchimpjust nowSucceeded

Mailchimp · AudienceAdded dana@northwind.example (Dana Ortiz) with tag website-signup

Build your own

Need it to work differently?

This template is a starting point. Copy the prompt and change it, or describe a different automation from scratch, with your own conditions, more apps or an AI step. Your assistant writes it, tests it and runs it on ClickRuntime.

Your own rules
Conditions, thresholds, filters and exceptions, written the way you'd explain them to a colleague.
Any number of apps
One automation can read from one app and update several others. Over 248 apps are ready, and anything with an API works too.
AI where it helps
Summaries, classification, extraction and drafts use ClickRuntime's built-in AI, with no extra key.
On a schedule or on each event
Runs as often as every 5 minutes, or the moment an app sends an event, and keeps track of what it already handled.

Changes you can ask for

Act only on the items that match your own rules, and skip the rest
Add an AI step, for example to summarize, sort or draft a reply
Add another app, for example also send it to Slack
Combine it with other Mailchimp steps into one automation

Under the hood

The code that runs this automation

This is the Python script that runs each time the automation starts. Your AI assistant writes it for you when you send the prompt, and you allow each step in your assistant. To change how the automation works, describe the change to your assistant and it updates the script for you. For every function it can use, see the script reference.

subscribe_from_a_webhook.pyexample

import hashlib
from clickruntime import on_event, http, credentials

LIST_ID = "AUDIENCE_ID"

def mailchimp(method, path, **kw):
    key = credentials.secret("MAILCHIMP_API_KEY")
    r = http.request(method, f"https://{key.split('-')[-1]}.api.mailchimp.com/3.0{path}", auth=("clickruntime", key), **kw)
    r.raise_for_status()
    return r.json() if r.content else None

@on_event
def handle(event):
    f = event.json or {}
    email = f.get("email", "").strip().lower()
    if "@" not in email:
        return {"added": False}
    first, _, last = f.get("name", "").partition(" ")
    h = hashlib.md5(email.encode()).hexdigest()
    mailchimp("PUT", f"/lists/{LIST_ID}/members/{h}", json={
        "email_address": email, "status_if_new": "subscribed", "merge_fields": {"FNAME": first, "LNAME": last}})
    mailchimp("POST", f"/lists/{LIST_ID}/members/{h}/tags", json={"tags": [{"name": "website-signup", "status": "active"}]})
    return {"added": True}

FAQ

Common questions

What does my form need to send?

At minimum an email address, plus optional fields such as first name or the tag to apply. The request goes to the address ClickRuntime gives you for this setup. If the email is missing or malformed, the run shows an error in the ClickRuntime dashboard and nobody is added.

Does it respect Mailchimp's consent rules?

It adds contacts with the status you configure. If your form collects explicit consent, you can add them as subscribed, and if you rely on double opt-in, they can be added as pending so Mailchimp sends its confirmation email. Choose according to your legal basis.

What happens if someone who unsubscribed submits the form again?

Mailchimp does not allow a previously unsubscribed contact to be silently re-added through the API. The run reports that the contact cannot be resubscribed, so you can ask the person to use a Mailchimp signup form instead.

What permissions does it need?

read+write. Nothing else in your accounts is used.

Does it need AI?

No. It runs without AI, so it doesn't use your plan's AI allowance.

How many runs does it use?

One run for each event the app sends.

Can I change how it works?

Yes. Describe the change to your AI assistant, for example a different schedule, channel or filter. It updates the automation, tests it and tells you what changed.

The moment it happens