> ## Documentation Index
> Fetch the complete documentation index at: https://deepline.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Context.dev: Contextdev List Monitor Changes

> List the changes one web monitor has detected, filtered by date or tag. Includes SDK V2 guidance, input constraints, response fields, and Deepline credit cost.

List the changes one web monitor has detected, filtered by date or tag.

> [!NOTE]
>
> Tool ID: `contextdev_list_monitor_changes`

## Run this action

Use the TypeScript SDK for one call. Use `ctx.tools.execute(...)` inside a Play for durable calls, scheduled calls, or CSV processing.

```ts theme={"languages":{"custom":["/languages/deepline-prompt.json"]}}
import { Deepline } from 'deepline';

const deepline = await Deepline.connect();
const result = await deepline.tools.execute(
  'contextdev_list_monitor_changes',
  {
    "monitor_id": "monitor_123"
  },
);

console.log(result.toolResponse.raw);
```

### CLI

```bash theme={"languages":{"custom":["/languages/deepline-prompt.json"]}}
deepline tools execute contextdev_list_monitor_changes --input '{
  "monitor_id": "monitor_123"
}' --json
```

## Example response

The SDK returns this shape at `result.toolResponse.raw`. The example values illustrate the response.

```json theme={"languages":{"custom":["/languages/deepline-prompt.json"]}}
{
  "data": {
    "data": [
      {
        "mode": "web",
        "id": "id_123",
        "monitor_id": "monitor_123",
        "target_type": "page",
        "change_detection_type": "exact",
        "title": "VP of Engineering",
        "summary": "example",
        "detected_at": "2026-01-15T12:00:00Z",
        "url": "https://example.com/resource"
      }
    ],
    "has_more": true,
    "next_cursor": "cursor_123"
  }
}
```

Use `deepline describe contextdev_list_monitor_changes --json` for the latest machine-readable contract.

## Input reference

List the changes detected by one monitor, with optional time and tag filters.

| Name | Type | Required | Default | Details |
| - | - | - | - | - |
| `payload.monitor_id` | `string` | Yes | — | — |
| `payload.tag` | `string` | No | — | Filter to items that have this tag. |
| `payload.since` | `string` | No | — | Only include items at or after this ISO 8601 timestamp. Format: `date-time`. |
| `payload.until` | `string` | No | — | Only include items before this ISO 8601 timestamp. Format: `date-time`. |
| `payload.limit` | `integer` | No | — | Maximum number of items to return per page (1-100). Defaults to 25. Minimum: 1. Maximum: 100. |
| `payload.cursor` | `string` | No | — | Opaque pagination cursor from a previous response. |

<details>
  <summary>Show raw input schema</summary>

  ### Input JSON Schema

  ```json theme={"languages":{"custom":["/languages/deepline-prompt.json"]}}
  {
    "type": "object",
    "description": "List the changes detected by one monitor, with optional time and tag filters.",
    "properties": {
      "monitor_id": {
        "type": "string"
      },
      "tag": {
        "type": "string",
        "description": "Filter to items that have this tag."
      },
      "since": {
        "type": "string",
        "description": "Only include items at or after this ISO 8601 timestamp.",
        "format": "date-time"
      },
      "until": {
        "type": "string",
        "description": "Only include items before this ISO 8601 timestamp.",
        "format": "date-time"
      },
      "limit": {
        "type": "integer",
        "description": "Maximum number of items to return per page (1-100). Defaults to 25.",
        "minimum": 1,
        "maximum": 100
      },
      "cursor": {
        "type": "string",
        "description": "Opaque pagination cursor from a previous response."
      }
    },
    "required": [
      "monitor_id"
    ],
    "additionalProperties": false
  }
  ```
</details>

## Output reference

| Name | Type | Required | Default | Details |
| - | - | - | - | - |
| `result.data` | `object` | Yes | — | — |
| `result.data.data` | `array` | Yes | — | — |
| `result.data.data[].mode` | `"web"` | Yes | — | Allowed: `web`. |
| `result.data.data[].id` | `string` | Yes | — | — |
| `result.data.data[].monitor_id` | `string` | Yes | — | — |
| `result.data.data[].target_type` | `"page" \| "sitemap" \| "extract"` | Yes | — | Allowed: `page`, `sitemap`, `extract`. |
| `result.data.data[].change_detection_type` | `"exact" \| "semantic"` | Yes | — | Allowed: `exact`, `semantic`. |
| `result.data.data[].title` | `string` | Yes | — | — |
| `result.data.data[].summary` | `string` | Yes | — | — |
| `result.data.data[].detected_at` | `string` | Yes | — | Format: `date-time`. |
| `result.data.data[].url` | `string` | Yes | — | Format: `uri`. |
| `result.data.data[].importance` | `"low" \| "medium" \| "high"` | No | — | Allowed: `low`, `medium`, `high`. |
| `result.data.data[].confidence` | `number` | No | — | Minimum: 0. Maximum: 1. |
| `result.data.data[].added_url_count` | `integer` | No | — | Minimum: 0. |
| `result.data.data[].removed_url_count` | `integer` | No | — | Minimum: 0. |
| `result.data.data[].matched_url_count` | `integer` | No | — | Minimum: 0. |
| `result.data.data[].tags` | `array` | No | — | Maximum items: 20. Items must be unique. |
| `result.data.has_more` | `boolean` | Yes | — | — |
| `result.data.next_cursor` | `string \| null` | Yes | — | — |
| `result.meta` | `object` | No | — | — |

<details>
  <summary>Show raw output schema</summary>

  ### Output JSON Schema

  ```json theme={"languages":{"custom":["/languages/deepline-prompt.json"]}}
  {
    "type": "object",
    "properties": {
      "data": {
        "type": "object",
        "properties": {
          "data": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "mode": {
                  "type": "string",
                  "enum": [
                    "web"
                  ]
                },
                "id": {
                  "type": "string"
                },
                "monitor_id": {
                  "type": "string"
                },
                "target_type": {
                  "type": "string",
                  "enum": [
                    "page",
                    "sitemap",
                    "extract"
                  ]
                },
                "change_detection_type": {
                  "type": "string",
                  "enum": [
                    "exact",
                    "semantic"
                  ]
                },
                "title": {
                  "type": "string"
                },
                "summary": {
                  "type": "string"
                },
                "detected_at": {
                  "type": "string",
                  "format": "date-time"
                },
                "url": {
                  "type": "string",
                  "format": "uri"
                },
                "importance": {
                  "type": "string",
                  "enum": [
                    "low",
                    "medium",
                    "high"
                  ]
                },
                "confidence": {
                  "type": "number",
                  "minimum": 0,
                  "maximum": 1
                },
                "added_url_count": {
                  "type": "integer",
                  "minimum": 0
                },
                "removed_url_count": {
                  "type": "integer",
                  "minimum": 0
                },
                "matched_url_count": {
                  "type": "integer",
                  "minimum": 0
                },
                "tags": {
                  "type": "array",
                  "maxItems": 20,
                  "uniqueItems": true,
                  "items": {
                    "type": "string",
                    "minLength": 1,
                    "maxLength": 50
                  }
                }
              },
              "required": [
                "mode",
                "id",
                "monitor_id",
                "target_type",
                "change_detection_type",
                "title",
                "summary",
                "detected_at",
                "url"
              ],
              "additionalProperties": false
            }
          },
          "has_more": {
            "type": "boolean"
          },
          "next_cursor": {
            "type": [
              "string",
              "null"
            ]
          }
        },
        "required": [
          "data",
          "has_more",
          "next_cursor"
        ],
        "additionalProperties": false
      },
      "meta": {
        "type": "object",
        "additionalProperties": true
      }
    },
    "required": [
      "data"
    ],
    "additionalProperties": false
  }
  ```
</details>

## Deepline cost

* Pricing model: `fixed` (per call).
* Estimated Deepline credits: `0` per pricing unit.
* Provider-native pricing may still exist outside Deepline credit billing.

## Related documentation

* [Context.dev provider guide](https://deepline.com/docs/providers/contextdev/guide.md)
* [SDK V2 quickstart](https://deepline.com/docs/sdk-v2/quickstart.md)
* [SDK reference](https://deepline.com/docs/sdk-v2/sdk-reference.md)
* [Run tools across a CSV](https://deepline.com/docs/sdk-v2/batch-csv.md)


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