# Mailchimp + Slack — Pipedream Connect

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

- Apps: Mailchimp (`mailchimp`) + Slack (`slack_v2`)
- This page (HTML): https://pipedream.com/apps/mailchimp/integrations/slack-v2
- 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,slack_v2`
- `x-pd-app-slug` takes a comma-separated list, so `mailchimp,slack_v2` 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,slack_v2",
      },
    },
  },
)

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 Slack 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, slackV2Tools] =
  await Promise.all([
    pd.components.list({ app: "mailchimp" }),
    pd.components.list({ app: "slack_v2" }),
  ])

// 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`

## Slack

- API slug: `slack_v2` (use in MCP headers and tool keys)
- Auth: OAuth (Pipedream-managed)
- Categories: Communication
- Website: https://slack.com
- Managed OAuth scopes: `chat:write` · `chat:write.customize` · `chat:write.public` · `files:read`
- App page (HTML): https://pipedream.com/apps/slack-v2
- Tools: 50 actions · 9 triggers

Full tool list, API proxy, and SDK quickstart: https://pipedream.com/apps/slack-v2.md

### Actions (top 8 of 50)

- [Send Message to Channel](https://pipedream.com/apps/slack-v2/actions/send-message-to-channel.md) — `slack_v2-send-message-to-channel`
- [Add Emoji Reaction](https://pipedream.com/apps/slack-v2/actions/add-emoji-reaction.md) — `slack_v2-add-emoji-reaction`
- [Add Reaction](https://pipedream.com/apps/slack-v2/actions/add-reaction.md) — `slack_v2-add-reaction`
- [Archive Channel](https://pipedream.com/apps/slack-v2/actions/archive-channel.md) — `slack_v2-archive-channel`
- [Browse Files](https://pipedream.com/apps/slack-v2/actions/browse-files.md) — `slack_v2-browse-files`
- [Build and Send a Block Kit Message](https://pipedream.com/apps/slack-v2/actions/send-block-kit-message.md) — `slack_v2-send-block-kit-message`
- [Create a Channel](https://pipedream.com/apps/slack-v2/actions/create-channel.md) — `slack_v2-create-channel`
- [Create Reminder](https://pipedream.com/apps/slack-v2/actions/create-reminder.md) — `slack_v2-create-reminder`

### Triggers (top 4 of 9)

- [New Channel Created (Instant)](https://pipedream.com/apps/slack-v2/triggers/new-channel-created.md) — `slack_v2-new-channel-created`
- [New Interaction Events (Instant)](https://pipedream.com/apps/slack-v2/triggers/new-interaction-event-received.md) — `slack_v2-new-interaction-event-received`
- [New Keyword Mention (Instant)](https://pipedream.com/apps/slack-v2/triggers/new-keyword-mention.md) — `slack_v2-new-keyword-mention`
- [New Message In Channels (Instant)](https://pipedream.com/apps/slack-v2/triggers/new-message-in-channels.md) — `slack_v2-new-message-in-channels`

---

- Mailchimp: https://pipedream.com/apps/mailchimp.md · Slack: https://pipedream.com/apps/slack-v2.md
- All apps: https://pipedream.com/apps — index: https://pipedream.com/llms.txt
- Pipedream docs for agents: https://pipedream.com/docs/llms.txt