Integration
MCP for Mailchimp: Claude, with its hands on your account.
You've run Mailchimp for years. It sends the newsletter, it runs the welcome series, it does the job. Then you try something with real lifecycle rigour — segment the customers who bought once and never came back, ladder a win-back that actually matches your churn window, design the test so the result is readable — and you're back to doing it by hand, tab by tab. Ask Claude for help and it gives you good advice about all of it. Generic advice. It has never seen your audiences, your segments, or last quarter's open rates. An MCP for Mailchimp — a way to hand Claude real tools instead of general knowledge — is what closes that gap. Claude stops describing the win-back and starts building it in your account.
What "MCP" actually means here.
MCP stands for Model Context Protocol, an open standard from Anthropic that lets Claude reach outside the chat window. Think of it as a plugin system, except the plugins don't add small features — they give Claude entirely new capabilities: tools that read your data and build real artifacts. Orbit is one such MCP, built for lifecycle marketing. Install it, connect your Mailchimp key, and Claude gains the ability to read your account and write to it. You don't learn a new interface. You talk to Claude the way you already do, and it knows when to reach for what Orbit added. The full walk-through of what an MCP is and how it changes the work lives on the MCP for marketing page →.
What Orbit does with Mailchimp today.
No hand-waving. Mailchimp has one of the better public APIs in the category, so most of this is fully native. Where there's a limit, it's named — and we're careful to separate what Mailchimp's API won't allow from what Orbit simply hasn't built yet. Two different kinds of honest.
Check the connection
Works todayMailchimp ships a real health endpoint, so Orbit confirms your key and datacenter in a single call — no guessing.
Read your audiences and segments
Works todayEvery audience and its saved segments, with live member counts — the raw material for any lifecycle cut.
Read your campaigns
Works todaySent and draft campaigns with their metadata, so Claude can reason about what you've already shipped.
Pull campaign reports
Works todayOpens, clicks, bounces, and unsubscribes per campaign — the numbers a review is actually made of.
List and read templates
Partial — API limitList your whole library natively. Reading one back is metadata only — Mailchimp's API doesn't return stored template HTML on read (it comes back null), so keep the canonical HTML in your own repo and treat Mailchimp as the derived copy.
Build and update templates
Works todayCreate a template from HTML or patch an existing one. Orbit composes the copy, generates the MJML, and pushes clean HTML into your library.
Send a test email
Partial — API limitMailchimp's API only tests a campaign, never a bare template — that's its rule, not Orbit's. Point Orbit at a draft campaign that wraps your template and it fires the proof to your inbox. Orbit doesn't create or tidy up the campaign for you; that stays in your hands.
Classic automations
Not in v1Mailchimp's API reads campaigns cleanly but keeps classic automation journeys read-limited. Orbit covers campaigns today; automations are a later add, not an API dead-end.
The short version: Orbit can read your entire Mailchimp program and build production email straight into it. Two honest asterisks, both Mailchimp's API and not Orbit's: reading a template back gives you its metadata, not its stored HTML, and the test send runs through a draft campaign you point it at rather than a one-call proof.
How to connect it.
One credential, a couple of minutes. In Mailchimp, go to Account → Extras → API keys and generate a key. Paste it into Orbit's config and you're connected.
- API key — the one field that matters. Orbit reads your datacenter straight off the key's suffix (the part after the dash, like
us14), so it knows which regional endpoint to call without you telling it. - Server prefix — optional, and only if your key somehow has no suffix. Set it to the datacenter (
us14,us21, and so on) and Orbit uses that instead.
The key is stored as a secret and never leaves your machine in plain text. That's the whole setup — no OAuth dance, no app to install on Mailchimp's side.
What's deepest on Braze — and why we say so.
Orbit works with every major ESP, but its deepest single-platform integration is Braze. A handful of Orbit's tools are built around concepts that only exist in Braze — Canvas flows, Content Blocks, its media library — and those stay Braze-named on purpose. Faking a Mailchimp equivalent would just be a worse version of a thing Mailchimp doesn't have.
For Mailchimp, that trade barely bites: the portable work — reading your program, building templates, running the numbers — is exactly what most SMB and e-commerce teams need. And if you later graduate to a lifecycle-native platform, the tooling and the discipline travel with you.
The half that isn't about the API at all.
Reading and writing Mailchimp is the connection. The reason to bother is everything Claude does once it's connected. Orbit ships 66 lifecycle skills — structured protocols for the actual jobs: composing an email, laddering a win-back, scoring a subject line, running an audit. Those are ESP-agnostic; they work the same whether the account underneath is Mailchimp or anything else.
Underneath sit 99 tools — an MJML pipeline that compiles to clean, dark-mode-safe HTML, a render-and-QA gate that catches the clipping and inbox breakage before you send, and the calculators a real test needs: sample size, holdout, replenishment timing. Mailchimp gives you the send. Orbit gives you the practitioner sitting next to it.
Is this for you?
This is for the SMB or e-commerce marketer who runs Mailchimp and wants to run it with rigour — the person writing the segmentation logic, building the templates, and trying to make the test readable. If that's your week, Orbit takes the manual handoffs out of it. It's a weaker fit if you want a hands-off tool that runs the program while you watch a dashboard. Orbit doesn't run your program. You do. It just gives you a Claude that works like a lifecycle operator instead of a search engine — and a straight answer about what your ESP can and can't do, which is rarer than it should be.
Try it.
Orbit is a one-off purchase — $124.50 during the launch window, $249 after. One payment, every skill and tool included, no seats and no subscription. Paste your Mailchimp key and Claude goes from advisor to operations layer the same afternoon.
Frequently asked.
What is an MCP for Mailchimp?
An MCP — Model Context Protocol, an open standard from Anthropic — gives Claude real tools instead of general knowledge. Connected to Mailchimp through Orbit, Claude can read your audiences, segments, and campaign reports, and build or update templates in your account — rather than describing what you should do and leaving the doing to you.
Can Orbit build and update Mailchimp templates?
Yes. Mailchimp's API supports full template CRUD, so Orbit can create a template from HTML and patch an existing one. Orbit composes the copy, generates MJML that compiles to clean, client-safe HTML, and pushes it into your Mailchimp template library ready to drop into a campaign.
Can it send a test email?
Partly, and the constraint is Mailchimp's, not Orbit's. Mailchimp's test-send endpoint is campaign-scoped — it will only test a campaign, never a standalone template. So the proof runs against a draft campaign that wraps your template: create or point Orbit at one, and it fires the test to your address. Orbit doesn't spin the campaign up or tear it down for you — that part stays in Mailchimp, in your hands.
How do I connect Mailchimp to Orbit?
Paste a Mailchimp API key into Orbit's config. Generate one under Account → Extras → API keys in Mailchimp. Orbit reads the datacenter straight off the key's suffix (the bit after the dash, like us14), so there's usually nothing else to set. If your key has no suffix, set the server-prefix field manually. It takes a couple of minutes and unlocks every read-and-write feature.
Is Mailchimp the right home for a serious lifecycle program?
For an SMB or early e-commerce brand under roughly 100k contacts, yes — Mailchimp's audiences, segments, and reporting are more than enough to run a real activation-to-retention program, and Orbit gives you a practitioner's Claude on top of it. Where it strains is deep, branching automation and true incrementality testing at scale; if that's the week you're living in, a lifecycle-native platform like Braze is the graduation. Orbit works with both, deepest on Braze — so the tooling comes with you if you move.