# Mailchimp + Microsoft Outlook Calendar — Pipedream Connect

> Connect a user's Mailchimp and Microsoft Outlook Calendar accounts and expose tools for both apps directly in your product or your agent.

- Apps: Mailchimp (`mailchimp`) + Microsoft Outlook Calendar (`microsoft_outlook_calendar`)
- This page (HTML): https://pipedream.com/apps/mailchimp/integrations/microsoft-outlook-calendar
- One `external_user_id` owns both connected accounts, and each account stays independently revocable.

## One session, both toolsets (recommended)

- Endpoint: `https://remote.mcp.pipedream.net/v3`
- Headers: `Authorization: Bearer <token>` · `x-pd-project-id` · `x-pd-environment` · `x-pd-external-user-id` · `x-pd-app-slug: mailchimp,microsoft_outlook_calendar`
- `x-pd-app-slug` takes a comma-separated list, so `mailchimp,microsoft_outlook_calendar` is one session on one transport. Both toolsets arrive from a single `listTools()`, and a tool is called exactly as it would be in a single-app session.

```ts
import { Client } from "@modelcontextprotocol/sdk/client/index.js"
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js"
import { PipedreamClient } from "@pipedream/sdk"

const pd = new PipedreamClient({
  projectId: process.env.PIPEDREAM_PROJECT_ID!,
  clientId: process.env.PIPEDREAM_CLIENT_ID!,
  clientSecret: process.env.PIPEDREAM_CLIENT_SECRET!,
  projectEnvironment: "production",
})

const accessToken = await pd.rawAccessToken

const transport = new StreamableHTTPClientTransport(
  new URL("https://remote.mcp.pipedream.net/v3"),
  {
    requestInit: {
      headers: {
        Authorization: `Bearer ${accessToken}`,
        "x-pd-project-id": process.env.PIPEDREAM_PROJECT_ID!,
        "x-pd-environment": "production",
        "x-pd-external-user-id": "{external_user_id}", // any stable ID for this user in your system
        "x-pd-app-slug": "mailchimp,microsoft_outlook_calendar",
      },
    },
  },
)

const mcp = new Client({ name: "my-agent", version: "1.0.0" })
await mcp.connect(transport)

const { tools } = await mcp.listTools()

// One list, both toolsets: Mailchimp and Microsoft Outlook Calendar tools arrive
// together, each keyed by its own app's slug.

// e.g. run Add Member To Segment:
const result = await mcp.callTool({
  name: "mailchimp-add-segment-member",
  arguments: {
    listId: "List Id",
    segmentId: "Segment ID",
  },
})
```

Docs: [MCP guide](https://pipedream.com/docs/connect/mcp/developers.md)

## Both apps from your backend

```ts
import { PipedreamClient } from "@pipedream/sdk"

const pd = new PipedreamClient({
  projectId: process.env.PIPEDREAM_PROJECT_ID!,
  clientId: process.env.PIPEDREAM_CLIENT_ID!,
  clientSecret: process.env.PIPEDREAM_CLIENT_SECRET!,
  projectEnvironment: "production",
})

const externalUserId = "{external_user_id}" // any stable ID for this user in your system

const [mailchimpTools, microsoftOutlookCalendarTools] =
  await Promise.all([
    pd.components.list({ app: "mailchimp" }),
    pd.components.list({ app: "microsoft_outlook_calendar" }),
  ])

// One external user owns both connected accounts, so either app's tools
// run on their behalf with the same externalUserId.
```

Docs: [Managed auth guide](https://pipedream.com/docs/connect/managed-auth/quickstart.md) · [Tools guide](https://pipedream.com/docs/connect/components.md)

## Mailchimp

- API slug: `mailchimp` (use in MCP headers and tool keys)
- Auth: OAuth (Pipedream-managed)
- Categories: Marketing
- Website: https://mailchimp.com/developer/marketing/api/
- App page (HTML): https://pipedream.com/apps/mailchimp
- Tools: 30 actions · 13 triggers

Full tool list, API proxy, and SDK quickstart: https://pipedream.com/apps/mailchimp.md

### Actions (top 8 of 30)

- [Add Member To Segment](https://pipedream.com/apps/mailchimp/actions/add-segment-member.md) — `mailchimp-add-segment-member`
- [Add Note to Subscriber](https://pipedream.com/apps/mailchimp/actions/add-note-to-subscriber.md) — `mailchimp-add-note-to-subscriber`
- [Add Or Remove Members Tags](https://pipedream.com/apps/mailchimp/actions/add-remove-member-tags.md) — `mailchimp-add-remove-member-tags`
- [Add or Update Subscriber](https://pipedream.com/apps/mailchimp/actions/add-or-update-subscriber.md) — `mailchimp-add-or-update-subscriber`
- [Add Subscriber To Tag](https://pipedream.com/apps/mailchimp/actions/add-subscriber-to-tag.md) — `mailchimp-add-subscriber-to-tag`
- [Create Campaign](https://pipedream.com/apps/mailchimp/actions/create-campaign.md) — `mailchimp-create-campaign`
- [Create List](https://pipedream.com/apps/mailchimp/actions/create-list.md) — `mailchimp-create-list`
- [Delete Campaign](https://pipedream.com/apps/mailchimp/actions/delete-campaign.md) — `mailchimp-delete-campaign`

### Triggers (top 4 of 13)

- [Link Clicked](https://pipedream.com/apps/mailchimp/triggers/link-clicked.md) — `mailchimp-link-clicked`
- [New Audience](https://pipedream.com/apps/mailchimp/triggers/new-audience.md) — `mailchimp-new-audience`
- [New Campaign](https://pipedream.com/apps/mailchimp/triggers/new-campaign.md) — `mailchimp-new-campaign`
- [New Customer](https://pipedream.com/apps/mailchimp/triggers/new-customer.md) — `mailchimp-new-customer`

## Microsoft Outlook Calendar

- API slug: `microsoft_outlook_calendar` (use in MCP headers and tool keys)
- Auth: OAuth (Pipedream-managed)
- Categories: Productivity
- Website: https://learn.microsoft.com/en-us/graph/outlook-calendar-concept-overview
- Managed OAuth scopes: `User.Read` · `email` · `offline_access` · `openid` · `profile` · `Calendars.ReadWrite` · `People.Read`
- App page (HTML): https://pipedream.com/apps/microsoft-outlook-calendar
- Tools: 16 actions · 4 triggers

Full tool list, API proxy, and SDK quickstart: https://pipedream.com/apps/microsoft-outlook-calendar.md

### Actions (top 8 of 16)

- [Accept Event](https://pipedream.com/apps/microsoft-outlook-calendar/actions/accept-event.md) — `microsoft_outlook_calendar-accept-event`
- [Create Calendar Event](https://pipedream.com/apps/microsoft-outlook-calendar/actions/create-calendar-event.md) — `microsoft_outlook_calendar-create-calendar-event`
- [Decline Event](https://pipedream.com/apps/microsoft-outlook-calendar/actions/decline-event.md) — `microsoft_outlook_calendar-decline-event`
- [Delete Calendar Event](https://pipedream.com/apps/microsoft-outlook-calendar/actions/delete-calendar-event.md) — `microsoft_outlook_calendar-delete-calendar-event`
- [Delete Recurring Event Instance](https://pipedream.com/apps/microsoft-outlook-calendar/actions/delete-recurring-event-instance.md) — `microsoft_outlook_calendar-delete-recurring-event-instance`
- [Find Meeting Times](https://pipedream.com/apps/microsoft-outlook-calendar/actions/find-meeting-times.md) — `microsoft_outlook_calendar-find-meeting-times`
- [Get Current User](https://pipedream.com/apps/microsoft-outlook-calendar/actions/get-current-user.md) — `microsoft_outlook_calendar-get-current-user`
- [Get Event](https://pipedream.com/apps/microsoft-outlook-calendar/actions/get-event.md) — `microsoft_outlook_calendar-get-event`

### Triggers (4)

- [Calendar Event Deleted (Instant)](https://pipedream.com/apps/microsoft-outlook-calendar/triggers/deleted-calendar-event.md) — `microsoft_outlook_calendar-deleted-calendar-event`
- [New Calendar Event (Instant)](https://pipedream.com/apps/microsoft-outlook-calendar/triggers/new-calendar-event.md) — `microsoft_outlook_calendar-new-calendar-event`
- [New Calendar Event Update (Instant)](https://pipedream.com/apps/microsoft-outlook-calendar/triggers/updated-calendar-event.md) — `microsoft_outlook_calendar-updated-calendar-event`
- [New Upcoming Calendar Event (Polling)](https://pipedream.com/apps/microsoft-outlook-calendar/triggers/new-upcoming-event-polling.md) — `microsoft_outlook_calendar-new-upcoming-event-polling`

---

- Mailchimp: https://pipedream.com/apps/mailchimp.md · Microsoft Outlook Calendar: https://pipedream.com/apps/microsoft-outlook-calendar.md
- All apps: https://pipedream.com/apps — index: https://pipedream.com/llms.txt
- Pipedream docs for agents: https://pipedream.com/docs/llms.txt