# New Comment Added to Card (Instant) — Trello

> Emit new event for each new comment added to a card.

- Key: `trello-new-comment-added-to-card`
- Type: Trigger (Instant)
- Version: 0.2.6
- App: Trello (`trello`) — https://pipedream.com/apps/trello.md
- This page (HTML): https://pipedream.com/apps/trello/triggers/new-comment-added-to-card
- Source: https://github.com/PipedreamHQ/pipedream/blob/master/components/trello/sources/new-comment-added-to-card/new-comment-added-to-card.mjs

## Props

| Prop | Type | Required | Description |
|---|---|---|---|
| `board` | `string` | Yes | The Trello board you wish to select Options are loaded from the connected account. |
| `list` | `string` | No | If specified, events will only be emitted when a comment is added to a card in the specified list Options are loaded from the connected account. |
| `cards` | `string[]` | No | If specified, events will only be emitted when a comment is added to one of the specified cards Options are loaded from the connected account. |

## Returns

Events emitted by Trello.

## Run it

**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 deployed = await pd.triggers.deploy({
  id: "trello-new-comment-added-to-card",
  externalUserId: "{external_user_id}", // any stable ID for this user in your system
  configuredProps: {
    trello: { authProvisionId: "apn_xxxxxxx" },
    board: "Board",
    list: "List",
  },
  webhookUrl: "https://example.com/webhooks/trello",
})

console.log(deployed.id)
```

**cURL**

```bash
curl -X POST https://api.pipedream.com/v1/connect/{project_id}/triggers/deploy \
  -H "Content-Type: application/json" \
  -H "X-PD-Environment: production" \
  -H "Authorization: Bearer {access_token}" \
  -d '{
    "external_user_id": "{external_user_id}",
    "id": "trello-new-comment-added-to-card",
    "webhook_url": "https://example.com/webhooks/trello",
    "configured_props": {
      "trello": { "authProvisionId": "apn_xxxxxxx" },
      "board": "Board",
      "list": "List"
    }
  }'
```

**MCP**

MCP servers expose Trello actions as on-demand tools.

New Comment Added to Card (Instant) is an event source, so your application deploys it with the Connect SDK or API and then either receives each event at a webhook URL or retrieves events on demand with the trigger events API.

## Event delivery

Every event is sent to the HTTP endpoint you choose when you deploy the source. Or: no webhook required — your app or agent can fetch recent events from the [trigger events API](https://pipedream.com/docs/connect/api-reference/list-trigger-events.md) instead.

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