Add new HubSpot contacts to Mailchimp
Instantly connect HubSpot and Mailchimp with pre‑built templates using Postman Flows.
Overview
Build a robust contact synchronization system that adds new HubSpot contacts to your Mailchimp audience lists. This API-first integration gives developers complete control over the data flow between your CRM and email marketing platforms, allowing for custom field mapping and transformation logic beyond what basic app connectors provide. Ideal for engineering teams building scalable customer data pipelines or maintaining consistent contact records across marketing systems.
How does the HubSpot to Mailchimp integration work?
This template uses Postman Flows to connect HubSpot and Mailchimp to:
Query Mailchimp API endpoints for subscriber data changes
Extract contact details including name, email, properties, and list memberships
Transform the data to match Mailchimp's subscriber schema requirements
Create new subscribers in your specified Mailchimp audience lists
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 build your API-first workflow between HubSpot and Mailchimp with the control that developers need. Unlike basic automation tools, Postman Flows lets you customize every aspect—from request rate limiting to complex contact filtering—while maintaining visibility into every API interaction. Extend your integration by adding additional APIs or developing custom logic to create powerful, multi-step contact management workflows.
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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