# Alpaca + Polygon — Pipedream Connect

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

- Apps: Alpaca (`alpaca`) + Polygon (`polygon`)
- This page (HTML): https://pipedream.com/apps/alpaca/integrations/polygon
- 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: alpaca,polygon`
- `x-pd-app-slug` takes a comma-separated list, so `alpaca,polygon` 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": "alpaca,polygon",
      },
    },
  },
)

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

const { tools } = await mcp.listTools()

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

// e.g. run Cancel All Orders:
const result = await mcp.callTool({
  name: "alpaca-cancel-all-orders",
  arguments: {
    isPaperAPI: true,
  },
})
```

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 [alpacaTools, polygonTools] =
  await Promise.all([
    pd.components.list({ app: "alpaca" }),
    pd.components.list({ app: "polygon" }),
  ])

// 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)

## Alpaca

- API slug: `alpaca` (use in MCP headers and tool keys)
- Auth: OAuth (Pipedream-managed)
- Categories: Web & App Development
- Website: https://alpaca.markets/
- Managed OAuth scopes: `account:write` · `trading` · `data`
- App page (HTML): https://pipedream.com/apps/alpaca
- Tools: 8 actions · 0 triggers

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

### Actions (8)

- [Cancel All Orders](https://pipedream.com/apps/alpaca/actions/cancel-all-orders.md) — `alpaca-cancel-all-orders`
- [Cancel Order](https://pipedream.com/apps/alpaca/actions/cancel-order.md) — `alpaca-cancel-order`
- [Close All Positions](https://pipedream.com/apps/alpaca/actions/close-all-positions.md) — `alpaca-close-all-positions`
- [Close Position](https://pipedream.com/apps/alpaca/actions/close-position.md) — `alpaca-close-position`
- [Get Account Info](https://pipedream.com/apps/alpaca/actions/get-account-info.md) — `alpaca-get-account-info`
- [List Orders](https://pipedream.com/apps/alpaca/actions/list-orders.md) — `alpaca-list-orders`
- [List Positions](https://pipedream.com/apps/alpaca/actions/list-positions.md) — `alpaca-list-positions`
- [Place Order](https://pipedream.com/apps/alpaca/actions/place-order.md) — `alpaca-place-order`

## Polygon

- API slug: `polygon` (use in MCP headers and tool keys)
- Auth: API key (Pipedream-managed)
- Categories: Web & App Development
- Website: https://polygon.io
- App page (HTML): https://pipedream.com/apps/polygon
- Tools: 3 actions · 3 triggers

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

### Actions (3)

- [Get Company Financials](https://pipedream.com/apps/polygon/actions/get-company-financials.md) — `polygon-get-company-financials`
- [Get Historical Prices](https://pipedream.com/apps/polygon/actions/get-historical-prices.md) — `polygon-get-historical-prices`
- [Get Stock Price](https://pipedream.com/apps/polygon/actions/get-stock-price.md) — `polygon-get-stock-price`

### Triggers (3)

- [New Market News](https://pipedream.com/apps/polygon/triggers/new-market-news.md) — `polygon-new-market-news`
- [New Stock Price Summary](https://pipedream.com/apps/polygon/triggers/new-stock-price-summary.md) — `polygon-new-stock-price-summary`
- [New Stock Trade](https://pipedream.com/apps/polygon/triggers/new-stock-trade.md) — `polygon-new-stock-trade`

---

- Alpaca: https://pipedream.com/apps/alpaca.md · Polygon: https://pipedream.com/apps/polygon.md
- All apps: https://pipedream.com/apps — index: https://pipedream.com/llms.txt
- Pipedream docs for agents: https://pipedream.com/docs/llms.txt