MailChimp APIConnect MailChimp without building on its API
MailChimp has a REST API. Self-serve for any Mailchimp account holder (generate an API key in account settings), though what the API can do depends on the account's plan level and the user's role. If you're reading the docs because you need MailChimp to talk to the rest of your stack, Caddi does that without you writing or maintaining integration code: you show it the job once, and it runs it across MailChimp and your other tools.
- APIREST (JSON)
- AuthAPI key
- AccessSelf-serve
What the MailChimp API gives you
- Type
- REST (JSON)
- Authentication
- API key (HTTP Basic or Bearer) for your own account, or OAuth 2.0 to access other users' accounts
- Who can get access
- Self-serve for any Mailchimp account holder (generate an API key in account settings), though what the API can do depends on the account's plan level and the user's role.
- What it covers
- Audiences/lists and members, campaigns, automations, templates, reports, e-commerce store data, and batch operations.
- Limits
- Limit of 10 simultaneous connections (429 on excess) and a 120-second timeout per call, with no per-customer limit increases.
Official docs: mailchimp.com. Checked September 2026. Vendors change access terms, so confirm with MailChimp before you build.
Building on the MailChimp API vs. having Caddi run it
| The job | Build it on the API | With Caddi |
|---|---|---|
| Getting access | Register an app, get MailChimp credentials, and manage tokens and refreshes. | Connect your MailChimp account once. Caddi holds the connection. |
| Writing the integration | A developer maps fields, handles pagination, retries and rate limits, and writes the sync. | You show Caddi the MailChimp task the way you'd train a new hire. It writes verified code for it. |
| Steps the API doesn't cover | Screens with no endpoint stay manual, or need a separate RPA tool. | Caddi uses a secure, audited browser session where there's no API, in the same automation. |
| The other systems in the loop | Each extra tool is another API, another set of credentials, another integration to own. | One automation runs across all the tools the job touches. |
| Keeping it running | Someone owns the code when the API version, fields or your process change. | Every automation is reviewed before it runs in production, and every run is logged. |
Building on the API is the right call when you have engineers and the integration is your product. When the goal is getting MailChimp work off someone's desk, the build is the slow part.
What teams usually want the MailChimp API for
CRM → audience sync
Caddi mirrors the right CRM segments into MailChimp audiences and keeps unsubscribes and updates synced back.
Engagement write-back
Caddi pulls campaign engagement (opens, clicks, conversions) and writes the activity to the right CRM record.
Event-triggered campaign
When a CRM event happens (signed agreement, completed onboarding), Caddi triggers the right MailChimp campaign.
MailChimp API questions
Does MailChimp have an API?
Yes. MailChimp has a REST API, authenticated with API key (HTTP Basic or Bearer) for your own account, or OAuth 2.0 to access other users' accounts. The official documentation is at https://mailchimp.com/developer/marketing/.
How do I get access to the MailChimp API?
Self-serve for any Mailchimp account holder (generate an API key in account settings), though what the API can do depends on the account's plan level and the user's role.
Does the MailChimp API have rate limits?
Limit of 10 simultaneous connections (429 on excess) and a 120-second timeout per call, with no per-customer limit increases.
Can I connect MailChimp to my other tools without writing code against its API?
Yes. With Caddi you show the MailChimp task once, the way you'd train a new hire, and Caddi builds it as verified code that runs across MailChimp and the other tools the job touches. Where a step has no API, Caddi uses a secure, audited browser session in the same automation.
Do I need a developer to automate MailChimp with Caddi?
No. There is no integration code for you to write or maintain. Every automation Caddi builds for MailChimp is reviewed before it runs in production, and every run is logged.
Connect MailChimp without the build.
Drop your work email and pick a time. We'll show you Caddi running your MailChimp workflow end to end.