# n8n.io + Polar — Pipedream Connect

> Connect a user's n8n.io and Polar accounts and expose tools for both apps directly in your product or your agent.

- Apps: n8n.io (`n8n_io`) + Polar (`polar`)
- This page (HTML): https://pipedream.com/apps/n8n-io/integrations/polar
- 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: n8n_io,polar`
- `x-pd-app-slug` takes a comma-separated list, so `n8n_io,polar` 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": "n8n_io,polar",
      },
    },
  },
)

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

const { tools } = await mcp.listTools()

// One list, both toolsets: n8n.io and Polar tools arrive
// together, each keyed by its own app's slug.

// e.g. run Create Checkout:
const result = await mcp.callTool({
  name: "polar-create-checkout",
  arguments: {
    products: ["Products"],
    prices: "Prices",
  },
})
```

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 [n8nIoTools, polarTools] =
  await Promise.all([
    pd.components.list({ app: "n8n_io" }),
    pd.components.list({ app: "polar" }),
  ])

// 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)

## n8n.io

- API slug: `n8n_io` (use in MCP headers and tool keys)
- Auth: API key (Pipedream-managed)
- Categories: Infrastructure & Cloud
- Website: https://n8n.io/
- App page (HTML): https://pipedream.com/apps/n8n-io
- Tools: 0 actions · 0 triggers

Full tool list, API proxy, and SDK quickstart: https://pipedream.com/apps/n8n-io.md

## Polar

- API slug: `polar` (use in MCP headers and tool keys)
- Auth: OAuth (Pipedream-managed)
- Categories: Commerce
- Website: https://polar.sh/
- Managed OAuth scopes: `openid` · `email` · `profile` · `user:read` · `webhooks:read` · `webhooks:write` · `orders:read` · `subscriptions:read` · `transactions:read` · `metrics:read` · `products:read` · `checkouts:write` · `checkout_links:write` · `customers:read`
- App page (HTML): https://pipedream.com/apps/polar
- Tools: 5 actions · 5 triggers

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

### Actions (5)

- [Create Checkout](https://pipedream.com/apps/polar/actions/create-checkout.md) — `polar-create-checkout`
- [List Customers](https://pipedream.com/apps/polar/actions/list-customers.md) — `polar-list-customers`
- [List Orders](https://pipedream.com/apps/polar/actions/list-orders.md) — `polar-list-orders`
- [List Products](https://pipedream.com/apps/polar/actions/list-products.md) — `polar-list-products`
- [List Subscriptions](https://pipedream.com/apps/polar/actions/list-subscriptions.md) — `polar-list-subscriptions`

### Triggers (top 4 of 5)

- [New Benefit Created](https://pipedream.com/apps/polar/triggers/new-benefit-created.md) — `polar-new-benefit-created`
- [New Benefit Updated](https://pipedream.com/apps/polar/triggers/new-benefit-updated.md) — `polar-new-benefit-updated`
- [New Subscription Created](https://pipedream.com/apps/polar/triggers/new-subscription-created.md) — `polar-new-subscription-created`
- [New Subscription Updated](https://pipedream.com/apps/polar/triggers/new-subscription-updated.md) — `polar-new-subscription-updated`

---

- n8n.io: https://pipedream.com/apps/n8n-io.md · Polar: https://pipedream.com/apps/polar.md
- All apps: https://pipedream.com/apps — index: https://pipedream.com/llms.txt
- Pipedream docs for agents: https://pipedream.com/docs/llms.txt