> ## 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 Get Change

> Get one detected web page change with its diff, changed URLs, evidence, and importance. Includes inputs, outputs, SDK V2 examples, and Deepline cost.

Get one detected web page change with its diff, changed URLs, evidence, and importance.

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

## 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_get_change',
  {
    "change_id": "change_123"
  },
);

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

### CLI

```bash theme={"languages":{"custom":["/languages/deepline-prompt.json"]}}
deepline tools execute contextdev_get_change --input '{
  "change_id": "change_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": {
    "mode": "web",
    "id": "id_123",
    "monitor_id": "monitor_123",
    "run_id": "run_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",
    "tags": [
      "example"
    ]
  }
}
```

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

## Input reference

Fetch full change details, including diffs, URL changes, evidence, confidence, and importance.

| Name | Type | Required | Default | Details |
| - | - | - | - | - |
| `payload.change_id` | `string` | Yes | — | — |

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

  ### Input JSON Schema

  ```json theme={"languages":{"custom":["/languages/deepline-prompt.json"]}}
  {
    "type": "object",
    "description": "Fetch full change details, including diffs, URL changes, evidence, confidence, and importance.",
    "properties": {
      "change_id": {
        "type": "string"
      }
    },
    "required": [
      "change_id"
    ],
    "additionalProperties": false
  }
  ```
</details>

## Output reference

| Name | Type | Required | Default | Details |
| - | - | - | - | - |
| `result.data` | `object` | Yes | — | — |
| `result.data.mode` | `"web"` | Yes | — | Allowed: `web`. |
| `result.data.id` | `string` | Yes | — | — |
| `result.data.monitor_id` | `string` | Yes | — | — |
| `result.data.run_id` | `string` | Yes | — | — |
| `result.data.target_type` | `"page" \| "sitemap" \| "extract"` | Yes | — | Allowed: `page`, `sitemap`, `extract`. |
| `result.data.change_detection_type` | `"exact" \| "semantic"` | Yes | — | Allowed: `exact`, `semantic`. |
| `result.data.title` | `string` | Yes | — | — |
| `result.data.summary` | `string` | Yes | — | — |
| `result.data.detected_at` | `string` | Yes | — | Format: `date-time`. |
| `result.data.url` | `string` | Yes | — | Format: `uri`. |
| `result.data.importance` | `"low" \| "medium" \| "high"` | No | — | Allowed: `low`, `medium`, `high`. |
| `result.data.confidence` | `number` | No | — | Minimum: 0. Maximum: 1. |
| `result.data.diff` | `string` | No | — | — |
| `result.data.before_text_excerpt` | `string` | No | — | — |
| `result.data.after_text_excerpt` | `string` | No | — | — |
| `result.data.added_urls` | `array` | No | — | — |
| `result.data.removed_urls` | `array` | No | — | — |
| `result.data.added_url_count` | `integer` | No | — | Minimum: 0. |
| `result.data.removed_url_count` | `integer` | No | — | Minimum: 0. |
| `result.data.matched_urls` | `array` | No | — | — |
| `result.data.matched_url_count` | `integer` | No | — | Minimum: 0. |
| `result.data.evidence` | `array` | No | — | — |
| `result.data.evidence[].url` | `string` | No | — | Format: `uri`. |
| `result.data.evidence[].before` | `string` | Yes | — | — |
| `result.data.evidence[].after` | `string` | Yes | — | — |
| `result.data.tags` | `array` | Yes | — | Maximum items: 20. Items must be unique. |
| `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": {
          "mode": {
            "type": "string",
            "enum": [
              "web"
            ]
          },
          "id": {
            "type": "string"
          },
          "monitor_id": {
            "type": "string"
          },
          "run_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
          },
          "diff": {
            "type": "string"
          },
          "before_text_excerpt": {
            "type": "string"
          },
          "after_text_excerpt": {
            "type": "string"
          },
          "added_urls": {
            "type": "array",
            "items": {
              "type": "string",
              "format": "uri"
            }
          },
          "removed_urls": {
            "type": "array",
            "items": {
              "type": "string",
              "format": "uri"
            }
          },
          "added_url_count": {
            "type": "integer",
            "minimum": 0
          },
          "removed_url_count": {
            "type": "integer",
            "minimum": 0
          },
          "matched_urls": {
            "type": "array",
            "items": {
              "type": "string",
              "format": "uri"
            }
          },
          "matched_url_count": {
            "type": "integer",
            "minimum": 0
          },
          "evidence": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "url": {
                  "type": "string",
                  "format": "uri"
                },
                "before": {
                  "type": "string"
                },
                "after": {
                  "type": "string"
                }
              },
              "required": [
                "before",
                "after"
              ],
              "additionalProperties": false
            }
          },
          "tags": {
            "type": "array",
            "maxItems": 20,
            "uniqueItems": true,
            "items": {
              "type": "string",
              "minLength": 1,
              "maxLength": 50
            }
          }
        },
        "required": [
          "mode",
          "id",
          "monitor_id",
          "run_id",
          "target_type",
          "change_detection_type",
          "title",
          "summary",
          "detected_at",
          "url",
          "tags"
        ],
        "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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