Create or update HubSpot contacts when Mailchimp subscribers are updated
Instantly connect HubSpot and Mailchimp with pre‑built templates using Postman Flows.
Overview
Automate your HubSpot Mailchimp API integration with this Postman Flows template. Instead of manually exporting contacts, dealing with CSV files, or using rigid automation tools, this flow synchronizes new HubSpot contacts to Mailchimp in real time—giving developers complete control over API calls, data transformations, and custom workflows.
How does the HubSpot to Mailchimp integration work?
This template uses Postman Flows to automate the process of adding new contacts from HubSpot to Mailchimp:
Detect new HubSpot contacts → Monitors HubSpot’s API for newly created contacts.
Extract & map contact data → Retrieves key details like name, email, and additional metadata.
Validate & transform data → Ensures the payload is structured correctly for Mailchimp.
Sync to Mailchimp → Creates or updates a subscriber in the appropriate audience list.
(Optional) Apply filters & custom logic → Only sync specific contacts or trigger additional actions such as follow-up emails or CRM updates.
How to use this template
Follow these steps to set up your integration in Postman:
Set up API access:
Configure your Mailchimp audience:
Choose or create an audience list where new contacts will be added.
Ensure necessary fields (e.g., Email, First Name, Last Name) are present.
Set up environment variables in Postman:
Store your HubSpot API key and Mailchimp API key as environment variables.
Define your Mailchimp audience ID for subscriber management.
Test and activate the flow:
Run a test to verify that new HubSpot contacts are correctly added to Mailchimp.
Automate the process by configuring trigger intervals or connecting external events.
Get started in minutes
Fork this template, connect your HubSpot and Mailchimp accounts, and start automating your contact sync in minutes. With flexible API-driven automation, you can eliminate manual processes and keep your email lists up to date effortlessly.
Frequently asked questions
What is Postman Flows?
Postman Flows is a visual tool for building API workflows. You can connect APIs, services, and data in a drag-and-drop interface—without writing code. It’s built for developers and technical teams who want flexibility and control over how APIs interact.
How is this different from Zapier?
Zapier is great for automating popular SaaS tools. Postman Flows is API-first—it gives you complete control over request structure, data transformations, and logic. You can use it to orchestrate internal APIs, chain service calls, and go beyond the limitations of most no-code tools.
Can I use Flows with internal APIs or microservices?
Yes. Because Flows are built on top of Postman’s core platform, you can connect to internal APIs, services behind a firewall, or staging environments—just like you would with any Postman request. It’s ideal for platform teams and service orchestration.
Do I need to know how to code to use Flows?
No coding required—but if you’re comfortable with APIs and how requests are structured, you’ll feel right at home. Flows lets you visually define logic, pass data between steps, and build useful workflows without writing scripts.
Can I run this Flow automatically?
You can trigger Flows manually or on a schedule using Postman Monitors. Programmatic triggers like webhooks or Postman’s public API aren’t supported yet, but they’re on the roadmap.
How do I test a Flow before using it in production?
You can run Flows interactively in your browser. Use test environments to simulate different conditions, inspect step-by-step output, and refine your logic before going live.
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