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

# Update Task

> Update a task's fields

# Update Task

Update one or more fields of an existing task. If the task is reassigned, the new assignee receives an email notification.

## Request

### Headers

<ParamField header="x-api-key" type="string" required>
  Your API key for authentication

  **Example:** `sk_live_1234567890abcdef`
</ParamField>

<ParamField header="x-organization-id" type="string" required>
  Your organization UUID

  **Example:** `a8315ef3-dd50-43f8-b7ce-d839e68d51fa`
</ParamField>

<ParamField header="Accept-Language" type="string" default="es">
  Language for the notification email: `en`, `es`, `fr`, `pt`, `it`, `de`
</ParamField>

### Path Parameters

<ParamField path="task_id" type="string" required>
  UUID of the task
</ParamField>

### Body Parameters

All fields are optional — only include those you want to change.

<ParamField body="title" type="string">
  New task title
</ParamField>

<ParamField body="description" type="string">
  New description
</ParamField>

<ParamField body="due_date" type="string">
  New due date (YYYY-MM-DD)
</ParamField>

<ParamField body="stage" type="string">
  New stage: `not_applicable`, `pending`, `in_progress`, `completed`, `validated`
</ParamField>

<ParamField body="category" type="string">
  New category
</ParamField>

<ParamField body="assigned_to" type="string">
  UUID of the new assignee
</ParamField>

<ParamField body="tags" type="string[]">
  Updated list of tags (replaces existing)
</ParamField>

<ParamField body="update_children" type="boolean" default="false">
  If `true` and stage is set to `completed`, all subtasks with `pending` or `in_progress` stage are also moved to `completed`
</ParamField>

## Response

Returns the updated task object.

<ResponseField name="id" type="string">
  Task UUID
</ResponseField>

<ResponseField name="title" type="string">
  Task title
</ResponseField>

<ResponseField name="description" type="string">
  Task description
</ResponseField>

<ResponseField name="due_date" type="string">
  Due date (YYYY-MM-DD)
</ResponseField>

<ResponseField name="stage" type="string">
  Task stage: `not_applicable`, `pending`, `in_progress`, `completed`, `validated`, `deleted`
</ResponseField>

<ResponseField name="category" type="string">
  Task category
</ResponseField>

<ResponseField name="assigned_to" type="object">
  Assigned user with `id`, `first_name`, `last_name`, `email`
</ResponseField>

<ResponseField name="projects" type="array[object]">
  Projects this task belongs to, each with `id`, `name`, `type`, etc.
</ResponseField>

<ResponseField name="comments" type="array[object]">
  Task comments, each with `id` and `comment`
</ResponseField>

<ResponseField name="progress" type="number | null">
  Completion progress (0–100)
</ResponseField>

<ResponseField name="tags" type="array[string]">
  Task tags
</ResponseField>

## Example

<CodeGroup>
  ```bash cURL theme={"theme":{"light":"github-light","dark":"github-dark"}}
  curl -X PATCH "https://api.dcycle.io/v1/tasks/${TASK_ID}" \
    -H "x-api-key: ${DCYCLE_API_KEY}" \
    -H "x-organization-id: ${DCYCLE_ORG_ID}" \
    -H "Content-Type: application/json" \
    -d '{
      "stage": "completed",
      "update_children": true
    }'
  ```

  ```python Python theme={"theme":{"light":"github-light","dark":"github-dark"}}
  import requests
  import os

  response = requests.patch(
      f"https://api.dcycle.io/v1/tasks/{os.getenv('TASK_ID')}",
      headers={
          "x-api-key": os.getenv("DCYCLE_API_KEY"),
          "x-organization-id": os.getenv("DCYCLE_ORG_ID"),
          "Content-Type": "application/json",
      },
      json={
          "stage": "completed",
          "update_children": True,
      },
  )

  task = response.json()
  print(f"Task {task['id']} → {task['stage']}")
  ```

  ```javascript JavaScript theme={"theme":{"light":"github-light","dark":"github-dark"}}
  const axios = require('axios');

  const { data: task } = await axios.patch(
    `https://api.dcycle.io/v1/tasks/${process.env.TASK_ID}`,
    { stage: 'completed', update_children: true },
    {
      headers: {
        'x-api-key': process.env.DCYCLE_API_KEY,
        'x-organization-id': process.env.DCYCLE_ORG_ID,
        'Content-Type': 'application/json',
      },
    }
  );

  console.log(`Task ${task.id} → ${task.stage}`);
  ```
</CodeGroup>

### Successful Response

```json theme={"theme":{"light":"github-light","dark":"github-dark"}}
{
  "id": "task-uuid",
  "title": "Upload Q2 electricity invoices",
  "description": "Upload all Q2 2025 electricity invoices",
  "due_date": "2025-07-15",
  "stage": "completed",
  "category": "data_collection",
  "assigned_to": {
    "id": "user-uuid",
    "first_name": "Carlos",
    "last_name": "López"
  },
  "projects": [
    { "id": "project-uuid", "name": "Carbon Footprint 2025" }
  ],
  "comments": [],
  "progress": null,
  "tags": []
}
```

## Common Errors

### 401 Unauthorized

**Cause:** Missing or invalid API key

```json theme={"theme":{"light":"github-light","dark":"github-dark"}}
{"detail": "Invalid API key for organization", "code": "INVALID_API_KEY"}
```

### 403 Forbidden

**Cause:** The authenticated user is not a member of the organization

```json theme={"theme":{"light":"github-light","dark":"github-dark"}}
{"detail": "Logged User is not Member of Organization", "code": "LOGGED_USER_NOT_MEMBER"}
```

### 404 Not Found

**Cause:** The task does not exist or belongs to another organization

```json theme={"theme":{"light":"github-light","dark":"github-dark"}}
{"detail": "Not Found"}
```

### 422 Unprocessable Entity

**Cause:** Invalid field values in the request body

```json theme={"theme":{"light":"github-light","dark":"github-dark"}}
{
  "detail": [
    {
      "loc": ["body", "stage"],
      "msg": "value is not a valid enumeration member",
      "type": "type_error.enum"
    }
  ]
}
```

## Related Endpoints

<CardGroup cols={2}>
  <Card title="Get Task" icon="eye" href="/api-reference/projects/get-task">
    View current task state
  </Card>

  <Card title="Task Versions" icon="clock-rotate-left" href="/api-reference/projects/task-versions">
    View task change history
  </Card>
</CardGroup>