# HubSpot + Resend — Pipedream Connect

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

- Apps: HubSpot (`hubspot`) + Resend (`resend`)
- This page (HTML): https://pipedream.com/apps/hubspot/integrations/resend
- 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: hubspot,resend`
- `x-pd-app-slug` takes a comma-separated list, so `hubspot,resend` 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": "hubspot,resend",
      },
    },
  },
)

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

const { tools } = await mcp.listTools()

// One list, both toolsets: HubSpot and Resend tools arrive
// together, each keyed by its own app's slug.

// e.g. run Add Comment:
const result = await mcp.callTool({
  name: "hubspot-add-comment",
  arguments: {
    inboxId: "Inbox ID",
    channelId: "Channel 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 [hubspotTools, resendTools] =
  await Promise.all([
    pd.components.list({ app: "hubspot" }),
    pd.components.list({ app: "resend" }),
  ])

// 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)

## HubSpot

- API slug: `hubspot` (use in MCP headers and tool keys)
- Auth: OAuth (Pipedream-managed)
- Categories: CRM
- Website: https://hubspot.com
- Managed OAuth scopes: `oauth` · `crm.objects.contacts.read`
- App page (HTML): https://pipedream.com/apps/hubspot
- Tools: 108 actions · 27 triggers

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

### Actions (top 8 of 108)

- [Add Comment](https://pipedream.com/apps/hubspot/actions/add-comment.md) — `hubspot-add-comment`
- [Add Contact to List](https://pipedream.com/apps/hubspot/actions/add-contact-to-list.md) — `hubspot-add-contact-to-list`
- [Add Note to Contact](https://pipedream.com/apps/hubspot/actions/add-note-to-contact.md) — `hubspot-add-note-to-contact`
- [Archive Thread](https://pipedream.com/apps/hubspot/actions/archive-thread.md) — `hubspot-archive-thread`
- [Batch Create Companies](https://pipedream.com/apps/hubspot/actions/batch-create-companies.md) — `hubspot-batch-create-companies`
- [Batch Create or Update Contact](https://pipedream.com/apps/hubspot/actions/batch-create-or-update-contact.md) — `hubspot-batch-create-or-update-contact`
- [Batch Update Companies](https://pipedream.com/apps/hubspot/actions/batch-update-companies.md) — `hubspot-batch-update-companies`
- [Batch Upsert Companies](https://pipedream.com/apps/hubspot/actions/batch-upsert-companies.md) — `hubspot-batch-upsert-companies`

### Triggers (top 4 of 27)

- [Deleted Blog Posts](https://pipedream.com/apps/hubspot/triggers/delete-blog-article.md) — `hubspot-delete-blog-article`
- [New Company Property Change](https://pipedream.com/apps/hubspot/triggers/new-company-property-change.md) — `hubspot-new-company-property-change`
- [New Contact Added to List](https://pipedream.com/apps/hubspot/triggers/new-contact-added-to-list.md) — `hubspot-new-contact-added-to-list`
- [New Contact Property Change](https://pipedream.com/apps/hubspot/triggers/new-contact-property-change.md) — `hubspot-new-contact-property-change`

## Resend

- API slug: `resend` (use in MCP headers and tool keys)
- Auth: API key (Pipedream-managed)
- Categories: Communication
- Website: https://resend.com/
- App page (HTML): https://pipedream.com/apps/resend
- Tools: 2 actions · 0 triggers

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

### Actions (2)

- [Retrieve Email](https://pipedream.com/apps/resend/actions/retrieve-email.md) — `resend-retrieve-email`
- [Send Email](https://pipedream.com/apps/resend/actions/send-email.md) — `resend-send-email`

---

- HubSpot: https://pipedream.com/apps/hubspot.md · Resend: https://pipedream.com/apps/resend.md
- All apps: https://pipedream.com/apps — index: https://pipedream.com/llms.txt
- Pipedream docs for agents: https://pipedream.com/docs/llms.txt