> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://mailchimp.com/developer/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://mailchimp.com/developer/_mcp/server.
# Mailchimp Developer
# Build with Mailchimp
Mailchimp’s developer tools provide everything you need to integrate your data with intelligent marketing tools and event-driven transactional email and SMS.
Mailchimp Marketing API
[Send marketing campaigns](/developer/marketing)
* [Mailchimp core concepts](/developer/marketing/concepts)
* [API core concepts](/developer/marketing/api-concepts)
* [Building with Mailchimp](/developer/marketing/build)
* [API Reference](/developer/marketing/api)
Mailchimp’s Marketing API powers timely, relevant marketing campaigns with custom data pulled directly from your app.
Mailchimp Transactional
[Send transactional email and SMS](/developer/transactional)
* [Quick Start](/developer/transactional/guides/quick-start)
* [API Reference](/developer/transactional/api)
* [Documentation](/developer/transactional/docs/fundamentals)
Mailchimp Transactional (formerly Mandrill) sends targeted and event-driven messages via the API or SMTP, fast—with best-in-class deliverability.
## You’ll be in good company
When you build integrations with Mailchimp, you’re creating tools for a trusted and reliable platform that powers marketing, e-commerce, and more for millions of small businesses.
14M
Trusted by fourteen million customers and counting
1B
Rock-solid reliability delivers 1 billion emails daily
300+
Dev teams have launched over 300 Mailchimp integrations so far
Mailchimp Integration Partner Program
## A helping hand to scale your Mailchimp Integration
As an Integration Partner, you’ll have access to exclusive benefits, insights, and opportunities to grow your business.
[Learn more](/developer/integration-partner-program)
## \$1 Million to the Developer Community
We’ve invested in the developer community with a fund to power the creation of new Mailchimp integrations. Keep an eye on the integrations directory to see what’s new!
[Browse Integrations](https://mailchimp.com/integrations/)
> On the Mailchimp side, the fact that the API allows us to send automated emails to catch potential customers that might otherwise be lost is a great feature.
Santiago Paragarino, Senior Magento developer & Gonzalo Dominguez, Senior Engineer, Ebizmarts
> Developing the integration using the Mailchimp API 3.0 was a good experience, documentation is easy to understand and very detailed with proper examples of all requests/responses.
Danilo Alvarenga, CTO, 3dcart
> We use the Mailchimp API to simplify our onboarding. We were able to cut down our onboarding by 80% because now a user can just sign in and start listening to music and then we can relate back the music you listen to to your profile.
Patrick Hill, Executive Director, Disctopia