# Update task

Update a task by ID. Omitted fields stay unchanged; use unset to remove fields and expected to prevent overwriting a concurrent change.

POST https://api.brigg.app/v1/operations/tasks.UpdateTask

## Access & visibility

Allow `tasks.UpdateTask` on your API key. Resource read permissions: `core:Task`. Resource write permissions: `core:Task`.

**Workspace access by default.** Private member data requires [approved member delegation](https://developer.brigg.app/authentication#member-delegation) through `Brigg-Act-As`; the key supplies permissions while private ownership and project boundaries remain enforced.

[Set up authentication](https://developer.brigg.app/authentication) · [Choose permissions](https://developer.brigg.app/permissions)

## Request fields

Send a JSON object with the following fields. Required fields must be included; omit optional fields you do not need.
| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `id` | string | Yes | ID of a visible `core:Task` record. Find it with [tasks.ListTasks](https://developer.brigg.app/reference/tasks/ListTasks). Use the record's top-level `id`, not a business field or account ID. |
| `data` | [Task](#task-request-data) | No | The fields to set. |
| `unset` | array of string | No | Keys of `data` to remove. Each item: `"title"`, `"status"`, `"due_date"`, `"assignee_ref"`, `"description"`, `"parent_type"`, `"parent_id"`, `"company_ref"`. |
| `expected` | [object](#request-expected) | No | Prior business-field values that must still match before the write. Use fields from this record’s data object, without the data. prefix. Use {"$absent":true} as a value to require an absent field. A mismatch returns 409 conflict. See the conditional example for this resource. |

### Task · request.data

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `title` | string | No | Short description of the work to complete. |
| `status` | string | No | Work status: open, in_progress or done. A due date does not automatically change the status. Allowed: `"open"`, `"in_progress"`, `"done"`. |
| `due_date` | string | No | Due date as YYYY-MM-DD, without a time zone or time of day. |
| `assignee_ref` | string | No | ID of a `core:Person` record. Find it with [customers.ListPeople](https://developer.brigg.app/reference/customers/ListPeople) and use the top-level `id`. This is not an account ID or a display name. |
| `description` | string | No | Details of the work to complete. |
| `parent_type` | string | No | Record type this task belongs to, such as core:Company. |
| `parent_id` | string | No | ID of the record identified by parent_type. |
| `company_ref` | string | No | ID of a `core:Company` record. Find it with [customers.ListCompanies](https://developer.brigg.app/reference/customers/ListCompanies) and use the top-level `id`. This is not an account ID or a display name. |

### request.expected

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `title` | string or [object](#request-expected-title) | No | Commit only if the previous title value matches; use $absent to require that this field is missing. |
| `status` | string or [object](#request-expected-status) | No | Commit only if the previous status value matches; use $absent to require that this field is missing. |
| `due_date` | string or [object](#request-expected-due-date) | No | Commit only if the previous due_date value matches; use $absent to require that this field is missing. |
| `assignee_ref` | string or [object](#request-expected-assignee-ref) | No | Commit only if the previous assignee_ref value matches; use $absent to require that this field is missing. |
| `description` | string or [object](#request-expected-description) | No | Commit only if the previous description value matches; use $absent to require that this field is missing. |
| `parent_type` | string or [object](#request-expected-parent-type) | No | Commit only if the previous parent_type value matches; use $absent to require that this field is missing. |
| `parent_id` | string or [object](#request-expected-parent-id) | No | Commit only if the previous parent_id value matches; use $absent to require that this field is missing. |
| `company_ref` | string or [object](#request-expected-company-ref) | No | Commit only if the previous company_ref value matches; use $absent to require that this field is missing. |

### request.expected.title

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `$absent` | boolean | Yes | Require the field to be missing, rather than present with a null value. Always `true`. |

### request.expected.status

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `$absent` | boolean | Yes | Require the field to be missing, rather than present with a null value. Always `true`. |

### request.expected.due_date

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `$absent` | boolean | Yes | Require the field to be missing, rather than present with a null value. Always `true`. |

### request.expected.assignee_ref

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `$absent` | boolean | Yes | Require the field to be missing, rather than present with a null value. Always `true`. |

### request.expected.description

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `$absent` | boolean | Yes | Require the field to be missing, rather than present with a null value. Always `true`. |

### request.expected.parent_type

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `$absent` | boolean | Yes | Require the field to be missing, rather than present with a null value. Always `true`. |

### request.expected.parent_id

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `$absent` | boolean | Yes | Require the field to be missing, rather than present with a null value. Always `true`. |

### request.expected.company_ref

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `$absent` | boolean | Yes | Require the field to be missing, rather than present with a null value. Always `true`. |

## Update without losing changes

Send only the business fields you want to change in `data`; omitted fields stay unchanged. Use `unset` to remove an optional field. Setting a field to null is a different action and is allowed only when its schema permits null.

Use `expected` for a conditional update: supply the values you last read for the fields whose concurrent changes would matter. `{"$absent": true}` expects a missing field. A conflict means you must read the record again and decide how to reconcile the change. Keep the same idempotency key when retrying the original action; use a new key for a revised action.

## Response

Returns **200 OK** with a JSON body.

Record metadata sits outside `data`. Timestamps `created_at` and `updated_at` are Unix milliseconds. Optional business fields may be absent; absence does not mean false or zero. A field accepts null only when its type includes null.
| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `item` | [TaskRecord](#taskrecord-response-item) | Yes | The requested record, including its metadata and data fields. |

### TaskRecord · response.item

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `id` | string | Yes | Stable core:Task record ID. Keep this top-level value when reading or referring to this record. Available actions are linked under Next steps; an ID does not imply the resource can be edited. |
| `created_at` | number | Yes | Time the record was created, in Unix milliseconds. |
| `updated_at` | number | Yes | Time the record most recently changed, in Unix milliseconds. Use with overlapping windows for incremental reads. |
| `created_by` | string or null | Yes | Account that originally created the record, or null for a workspace/system-originated record. This is provenance, not its current owner or a Person record ID. |
| `private` | boolean | Yes | True for a member-owned private record. An API key needs approved delegation to that owner; false alone does not bypass resource grants or other access rules. |
| `data` | [Task](#task-response-item-data) | Yes | The record's fields. |

### Task · response.item.data

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `title` | string | Yes | Short description of the work to complete. |
| `status` | string | No | Work status: open, in_progress or done. A due date does not automatically change the status. Allowed: `"open"`, `"in_progress"`, `"done"`. |
| `due_date` | string | No | Due date as YYYY-MM-DD, without a time zone or time of day. |
| `assignee_ref` | string | No | ID of a `core:Person` record. Find it with [customers.ListPeople](https://developer.brigg.app/reference/customers/ListPeople) and use the top-level `id`. This is not an account ID or a display name. |
| `description` | string | No | Details of the work to complete. |
| `parent_type` | string | No | Record type this task belongs to, such as core:Company. |
| `parent_id` | string | No | ID of the record identified by parent_type. |
| `company_ref` | string | No | ID of a `core:Company` record. Find it with [customers.ListCompanies](https://developer.brigg.app/reference/customers/ListCompanies) and use the top-level `id`. This is not an account ID or a display name. |

## Errors & retries

Set `BRIGG_REQUEST_ID` once for each logical action. The samples send it as `Idempotency-Key`. Reuse the same value and body on retries, including after a timeout; a missing response does not prove the action failed.

For rate limits, follow the server’s retry guidance and back off. See [HTTP errors](https://developer.brigg.app/http#errors) and [safe retries and limits](https://developer.brigg.app/reliability).

| HTTP status | Code | What to do |
| --- | --- | --- |
| 400 | `invalid_json` | Send a JSON object with Content-Type: application/json. |
| 400 | `invalid_input` | Check the request fields and types. Supply a stable Idempotency-Key containing 1–200 characters. |
| 401 | `invalid_key` | The workspace API key is missing, invalid or revoked. |
| 403 | `forbidden` | Check the key’s operation and resource grants. If Brigg-Act-As is supplied, the key must be authorized to delegate to that member. |
| 404 | `not_found` | The requested operation or resource is not available to this credential. |
| 429 | `rate_limited` | Wait for Retry-After before retrying. Reuse the original Idempotency-Key. |
| 409 | `conflict` | A supplied expected value no longer matches. Read the record again before deciding whether to retry. |

## Next steps

- [List tasks](https://developer.brigg.app/reference/tasks/ListTasks)
- [Get task](https://developer.brigg.app/reference/tasks/GetTask)
- [Create task](https://developer.brigg.app/reference/tasks/CreateTask)
- [Upsert task](https://developer.brigg.app/reference/tasks/UpsertTask)
- [Delete task](https://developer.brigg.app/reference/tasks/DeleteTask)

[Download OpenAPI](https://developer.brigg.app/openapi.json) · [Versioning & retirement](https://developer.brigg.app/versioning)

## Examples

### Example request

Fictional values. Replace IDs and business details with values from your workspace.
#### cURL


```sh
curl 'https://api.brigg.app/v1/operations/tasks.UpdateTask' \
  -H "Authorization: Bearer $BRIGG_API_KEY" \
  -H 'Content-Type: application/json' \
  -H "Idempotency-Key: $BRIGG_REQUEST_ID" \
  --data-raw '{
  "id": "e_task_example",
  "data": {
    "status": "done"
  }
}'
```

#### TypeScript


```typescript
const requestId = process.env.BRIGG_REQUEST_ID;
if (!requestId) throw new Error("Set BRIGG_REQUEST_ID once per action and reuse it on retries.");

const response = await fetch("https://api.brigg.app/v1/operations/tasks.UpdateTask", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.BRIGG_API_KEY}`,
    "Content-Type": "application/json",
    "Idempotency-Key": requestId, // Create once per action; reuse on retries.
  },
  body: JSON.stringify({
    "id": "e_task_example",
    "data": {
      "status": "done"
    }
  }),
});
const result = await response.json();
if (!response.ok) throw new Error(`${response.status}: ${result.error} — ${result.message}`);
console.log(result);
```

#### Python


```python
import json
import os
from urllib.request import Request, urlopen
from urllib.error import HTTPError

request_id = os.environ["BRIGG_REQUEST_ID"]  # Reuse for retries of this action.
payload = {
  "id": "e_task_example",
  "data": {
    "status": "done"
  }
}
request = Request(
    "https://api.brigg.app/v1/operations/tasks.UpdateTask",
    data=json.dumps(payload).encode("utf-8"),
    headers={
        "Authorization": f"Bearer {os.environ['BRIGG_API_KEY']}",
        "Content-Type": "application/json",
        "Idempotency-Key": request_id,  # Create once per action; reuse on retries.
    },
    method="POST",
)
try:
    with urlopen(request) as response:
        print(json.load(response))
except HTTPError as error:
    print(error.code, json.load(error))
    raise
```

#### Response example


```json
{
  "item": {
    "id": "e_task_example",
    "created_at": 1794301200000,
    "updated_at": 1794301200000,
    "created_by": "a_example",
    "private": false,
    "data": {
      "title": "Send project proposal",
      "status": "done",
      "due_date": "2026-11-13",
      "company_ref": "e_company_example",
      "description": "Prepare a proposal for the onboarding project."
    }
  }
}
```

### Update only if unchanged

Use a value you actually read. A concurrent change refuses the write with 409 conflict.
#### cURL


```sh
curl 'https://api.brigg.app/v1/operations/tasks.UpdateTask' \
  -H "Authorization: Bearer $BRIGG_API_KEY" \
  -H 'Content-Type: application/json' \
  -H "Idempotency-Key: $BRIGG_REQUEST_ID" \
  --data-raw '{
  "id": "e_task_example",
  "data": {
    "status": "done"
  },
  "expected": {
    "title": "Send project proposal"
  }
}'
```

#### TypeScript


```typescript
const requestId = process.env.BRIGG_REQUEST_ID;
if (!requestId) throw new Error("Set BRIGG_REQUEST_ID once per action and reuse it on retries.");

const response = await fetch("https://api.brigg.app/v1/operations/tasks.UpdateTask", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.BRIGG_API_KEY}`,
    "Content-Type": "application/json",
    "Idempotency-Key": requestId, // Create once per action; reuse on retries.
  },
  body: JSON.stringify({
    "id": "e_task_example",
    "data": {
      "status": "done"
    },
    "expected": {
      "title": "Send project proposal"
    }
  }),
});
const result = await response.json();
if (!response.ok) throw new Error(`${response.status}: ${result.error} — ${result.message}`);
console.log(result);
```

#### Python


```python
import json
import os
from urllib.request import Request, urlopen
from urllib.error import HTTPError

request_id = os.environ["BRIGG_REQUEST_ID"]  # Reuse for retries of this action.
payload = {
  "id": "e_task_example",
  "data": {
    "status": "done"
  },
  "expected": {
    "title": "Send project proposal"
  }
}
request = Request(
    "https://api.brigg.app/v1/operations/tasks.UpdateTask",
    data=json.dumps(payload).encode("utf-8"),
    headers={
        "Authorization": f"Bearer {os.environ['BRIGG_API_KEY']}",
        "Content-Type": "application/json",
        "Idempotency-Key": request_id,  # Create once per action; reuse on retries.
    },
    method="POST",
)
try:
    with urlopen(request) as response:
        print(json.load(response))
except HTTPError as error:
    print(error.code, json.load(error))
    raise
```

#### Response example


```json
{
  "item": {
    "id": "e_task_example",
    "created_at": 1794301200000,
    "updated_at": 1794301200000,
    "created_by": "a_example",
    "private": false,
    "data": {
      "title": "Send project proposal",
      "status": "done",
      "due_date": "2026-11-13",
      "company_ref": "e_company_example",
      "description": "Prepare a proposal for the onboarding project."
    }
  }
}
```

## JSON schemas


```json-schema-request
{
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "ID of a visible `core:Task` record. Find it with [tasks.ListTasks](https://developer.brigg.app/reference/tasks/ListTasks). Use the record's top-level `id`, not a business field or account ID."
    },
    "data": {
      "type": "object",
      "properties": {
        "title": {
          "type": "string",
          "description": "Short description of the work to complete."
        },
        "status": {
          "type": "string",
          "enum": [
            "open",
            "in_progress",
            "done"
          ],
          "description": "Work status: open, in_progress or done. A due date does not automatically change the status."
        },
        "due_date": {
          "type": "string",
          "description": "Due date as YYYY-MM-DD, without a time zone or time of day."
        },
        "assignee_ref": {
          "type": "string",
          "description": "ID of a `core:Person` record. Find it with [customers.ListPeople](https://developer.brigg.app/reference/customers/ListPeople) and use the top-level `id`. This is not an account ID or a display name."
        },
        "description": {
          "type": "string",
          "description": "Details of the work to complete."
        },
        "parent_type": {
          "type": "string",
          "description": "Record type this task belongs to, such as core:Company."
        },
        "parent_id": {
          "type": "string",
          "description": "ID of the record identified by parent_type."
        },
        "company_ref": {
          "type": "string",
          "description": "ID of a `core:Company` record. Find it with [customers.ListCompanies](https://developer.brigg.app/reference/customers/ListCompanies) and use the top-level `id`. This is not an account ID or a display name."
        }
      },
      "required": [],
      "additionalProperties": false,
      "description": "The fields to set.",
      "title": "Task"
    },
    "unset": {
      "type": "array",
      "items": {
        "type": "string",
        "enum": [
          "title",
          "status",
          "due_date",
          "assignee_ref",
          "description",
          "parent_type",
          "parent_id",
          "company_ref"
        ]
      },
      "description": "Keys of `data` to remove."
    },
    "expected": {
      "type": "object",
      "description": "Prior business-field values that must still match before the write. Use fields from this record’s data object, without the data. prefix. Use {\"$absent\":true} as a value to require an absent field. A mismatch returns 409 conflict. See the conditional example for this resource.",
      "additionalProperties": false,
      "properties": {
        "title": {
          "description": "Commit only if the previous title value matches; use $absent to require that this field is missing.",
          "anyOf": [
            {
              "type": "string",
              "description": "Short description of the work to complete."
            },
            {
              "type": "object",
              "properties": {
                "$absent": {
                  "type": "boolean",
                  "const": true,
                  "description": "Require the field to be missing, rather than present with a null value."
                }
              },
              "required": [
                "$absent"
              ],
              "additionalProperties": false
            }
          ]
        },
        "status": {
          "description": "Commit only if the previous status value matches; use $absent to require that this field is missing.",
          "anyOf": [
            {
              "type": "string",
              "enum": [
                "open",
                "in_progress",
                "done"
              ],
              "description": "Work status: open, in_progress or done. A due date does not automatically change the status."
            },
            {
              "type": "object",
              "properties": {
                "$absent": {
                  "type": "boolean",
                  "const": true,
                  "description": "Require the field to be missing, rather than present with a null value."
                }
              },
              "required": [
                "$absent"
              ],
              "additionalProperties": false
            }
          ]
        },
        "due_date": {
          "description": "Commit only if the previous due_date value matches; use $absent to require that this field is missing.",
          "anyOf": [
            {
              "type": "string",
              "description": "Due date as YYYY-MM-DD, without a time zone or time of day."
            },
            {
              "type": "object",
              "properties": {
                "$absent": {
                  "type": "boolean",
                  "const": true,
                  "description": "Require the field to be missing, rather than present with a null value."
                }
              },
              "required": [
                "$absent"
              ],
              "additionalProperties": false
            }
          ]
        },
        "assignee_ref": {
          "description": "Commit only if the previous assignee_ref value matches; use $absent to require that this field is missing.",
          "anyOf": [
            {
              "type": "string",
              "description": "ID of a `core:Person` record. Find it with [customers.ListPeople](https://developer.brigg.app/reference/customers/ListPeople) and use the top-level `id`. This is not an account ID or a display name."
            },
            {
              "type": "object",
              "properties": {
                "$absent": {
                  "type": "boolean",
                  "const": true,
                  "description": "Require the field to be missing, rather than present with a null value."
                }
              },
              "required": [
                "$absent"
              ],
              "additionalProperties": false
            }
          ]
        },
        "description": {
          "description": "Commit only if the previous description value matches; use $absent to require that this field is missing.",
          "anyOf": [
            {
              "type": "string",
              "description": "Details of the work to complete."
            },
            {
              "type": "object",
              "properties": {
                "$absent": {
                  "type": "boolean",
                  "const": true,
                  "description": "Require the field to be missing, rather than present with a null value."
                }
              },
              "required": [
                "$absent"
              ],
              "additionalProperties": false
            }
          ]
        },
        "parent_type": {
          "description": "Commit only if the previous parent_type value matches; use $absent to require that this field is missing.",
          "anyOf": [
            {
              "type": "string",
              "description": "Record type this task belongs to, such as core:Company."
            },
            {
              "type": "object",
              "properties": {
                "$absent": {
                  "type": "boolean",
                  "const": true,
                  "description": "Require the field to be missing, rather than present with a null value."
                }
              },
              "required": [
                "$absent"
              ],
              "additionalProperties": false
            }
          ]
        },
        "parent_id": {
          "description": "Commit only if the previous parent_id value matches; use $absent to require that this field is missing.",
          "anyOf": [
            {
              "type": "string",
              "description": "ID of the record identified by parent_type."
            },
            {
              "type": "object",
              "properties": {
                "$absent": {
                  "type": "boolean",
                  "const": true,
                  "description": "Require the field to be missing, rather than present with a null value."
                }
              },
              "required": [
                "$absent"
              ],
              "additionalProperties": false
            }
          ]
        },
        "company_ref": {
          "description": "Commit only if the previous company_ref value matches; use $absent to require that this field is missing.",
          "anyOf": [
            {
              "type": "string",
              "description": "ID of a `core:Company` record. Find it with [customers.ListCompanies](https://developer.brigg.app/reference/customers/ListCompanies) and use the top-level `id`. This is not an account ID or a display name."
            },
            {
              "type": "object",
              "properties": {
                "$absent": {
                  "type": "boolean",
                  "const": true,
                  "description": "Require the field to be missing, rather than present with a null value."
                }
              },
              "required": [
                "$absent"
              ],
              "additionalProperties": false
            }
          ]
        }
      }
    }
  },
  "required": [
    "id"
  ],
  "additionalProperties": false,
  "examples": [
    {
      "id": "e_task_example",
      "data": {
        "status": "done"
      }
    }
  ]
}
```


```json-schema-response
{
  "type": "object",
  "properties": {
    "item": {
      "type": "object",
      "properties": {
        "id": {
          "type": "string",
          "description": "Stable core:Task record ID. Keep this top-level value when reading or referring to this record. Available actions are linked under Next steps; an ID does not imply the resource can be edited."
        },
        "created_at": {
          "type": "number",
          "description": "Time the record was created, in Unix milliseconds."
        },
        "updated_at": {
          "type": "number",
          "description": "Time the record most recently changed, in Unix milliseconds. Use with overlapping windows for incremental reads."
        },
        "created_by": {
          "type": [
            "string",
            "null"
          ],
          "description": "Account that originally created the record, or null for a workspace/system-originated record. This is provenance, not its current owner or a Person record ID."
        },
        "private": {
          "type": "boolean",
          "description": "True for a member-owned private record. An API key needs approved delegation to that owner; false alone does not bypass resource grants or other access rules."
        },
        "data": {
          "type": "object",
          "properties": {
            "title": {
              "type": "string",
              "description": "Short description of the work to complete."
            },
            "status": {
              "type": "string",
              "enum": [
                "open",
                "in_progress",
                "done"
              ],
              "description": "Work status: open, in_progress or done. A due date does not automatically change the status."
            },
            "due_date": {
              "type": "string",
              "description": "Due date as YYYY-MM-DD, without a time zone or time of day."
            },
            "assignee_ref": {
              "type": "string",
              "description": "ID of a `core:Person` record. Find it with [customers.ListPeople](https://developer.brigg.app/reference/customers/ListPeople) and use the top-level `id`. This is not an account ID or a display name."
            },
            "description": {
              "type": "string",
              "description": "Details of the work to complete."
            },
            "parent_type": {
              "type": "string",
              "description": "Record type this task belongs to, such as core:Company."
            },
            "parent_id": {
              "type": "string",
              "description": "ID of the record identified by parent_type."
            },
            "company_ref": {
              "type": "string",
              "description": "ID of a `core:Company` record. Find it with [customers.ListCompanies](https://developer.brigg.app/reference/customers/ListCompanies) and use the top-level `id`. This is not an account ID or a display name."
            }
          },
          "required": [
            "title"
          ],
          "additionalProperties": false,
          "description": "The record's fields.",
          "title": "Task"
        }
      },
      "required": [
        "id",
        "created_at",
        "updated_at",
        "created_by",
        "private",
        "data"
      ],
      "additionalProperties": false,
      "description": "The requested record, including its metadata and data fields.",
      "title": "TaskRecord"
    }
  },
  "required": [
    "item"
  ],
  "additionalProperties": false,
  "examples": [
    {
      "item": {
        "id": "e_task_example",
        "created_at": 1794301200000,
        "updated_at": 1794301200000,
        "created_by": "a_example",
        "private": false,
        "data": {
          "title": "Send project proposal",
          "status": "done",
          "due_date": "2026-11-13",
          "company_ref": "e_company_example",
          "description": "Prepare a proposal for the onboarding project."
        }
      }
    }
  ]
}
```