Add Mailchimp subscribers for new HubSpot contact property changes
Instantly connect HubSpot and Mailchimp with pre‑built templates using Postman Flows.
Overview
This template implements a programmatic solution for synchronizing contact data between HubSpot and Mailchimp based on property change events. By leveraging both platforms' APIs, this solution offers more customization and control than typical no-code integrations, making it ideal for development teams that need to implement specific business logic for contact synchronization.
How does the HubSpot to Mailchimp integration template work?
This template uses Postman Flows to connect HubSpot and Mailchimp to:
Query the HubSpot Contacts API to detect property changes
Apply filtering logic to determine which contacts should be synchronized based on property values
Extract relevant contact data from HubSpot's Contact API
Transform the data to match Mailchimp's subscriber format specifications
Create or update subscribers in your designated Mailchimp audience via Mailchimp's API
How to use this template
Follow these steps to set up your integration in Postman:
Set up authentication for both services:
Store variables in Postman:
Store your API authentication credentials securely as environment variables
Configure the flow:
Add your environment to each Send Request block
Test and activate your integration
Run the flow with sample data to validate your API interactions
Monitor request/response cycles with Postman's built-in debugging tools
(Optional) Automate the process with regular trigger intervals
Get started in minutes
Fork this template to implement a developer-controlled HubSpot-Mailchimp integration with complete access to both APIs. Unlike basic integration tools, this template gives you full control over the synchronization logic, field mapping, and error handling. Use this foundation to build a robust integration that matches your exact business requirements while maintaining visibility into all API interactions.
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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