# List Columns — Smartsheet

> List all columns in a sheet, returning each column's ID, title, type, options (for PICKLIST/CONTACT_LIST), validation, and position index. This is lighter-weight than Get Sheet when you only need the column schema and not row data. Use…

- Key: `smartsheet-list-columns`
- Type: Action (Read-only)
- Version: 0.1.1
- App: Smartsheet (`smartsheet`) — https://pipedream.com/apps/smartsheet.md
- This page (HTML): https://pipedream.com/apps/smartsheet/actions/list-columns
- Hints: read-only · open-world
- Source: https://github.com/PipedreamHQ/pipedream/blob/master/components/smartsheet/actions/list-columns/list-columns.mjs

## Description

List all columns in a sheet, returning each column's ID, title, type, options (for PICKLIST/CONTACT_LIST), validation, and position index. This is lighter-weight than **Get Sheet** when you only need the column schema and not row data. Use this before **Add Row to Sheet** or **Update Row** to discover column names and types. For full sheet data including rows, use **Get Sheet** instead. [See the documentation](https://developers.smartsheet.com/api/smartsheet/openapi/columns/columns-listonsheet)

## Props

| Prop | Type | Required | Description |
|---|---|---|---|
| `sheetId` | `string` | Yes | The sheet to act on. Accepts a numeric sheet ID (e.g. 1234567890123456), or a Smartsheet sheet URL, which is resolved to the ID for you. Use List Sheets to enumerate sheets, or Search to find one by name. |
| `level` | `integer` | No | Response format for multi-value columns. At the default level 0 a MULTI_PICKLIST or MULTI_CONTACT_LIST column is reported as TEXT_NUMBER for backwards compatibility, so pass 2 when you need the real column type. |

## Run it

**MCP**

```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": "smartsheet",
      },
    },
  },
)

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

const { tools } = await mcp.listTools()

// listTools() hands your model this tool's input schema, so it can
// fill the arguments itself:
const result = await mcp.callTool({
  name: "smartsheet-list-columns",
  arguments: {
    sheetId: "Sheet ID or URL",
    level: 10,
  },
})
```

**TypeScript**

```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 result = await pd.actions.run({
  id: "smartsheet-list-columns",
  externalUserId: "{external_user_id}", // any stable ID for this user in your system
  configuredProps: {
    smartsheet: { authProvisionId: "apn_xxxxxxx" },
    sheetId: "Sheet ID or URL",
    level: 10,
  },
})

console.log(result)
```

**cURL**

```bash
curl -X POST https://api.pipedream.com/v1/connect/{project_id}/actions/run \
  -H "Content-Type: application/json" \
  -H "X-PD-Environment: production" \
  -H "Authorization: Bearer {access_token}" \
  -d '{
    "external_user_id": "{external_user_id}",
    "id": "smartsheet-list-columns",
    "configured_props": {
      "smartsheet": { "authProvisionId": "apn_xxxxxxx" },
      "sheetId": "Sheet ID or URL",
      "level": 10
    }
  }'
```

---

- App: https://pipedream.com/apps/smartsheet.md · All apps: https://pipedream.com/apps