For AI agents: markdown of this page — /docs-content-en/entities/tasks/add-accomplices.md documentation index — /llms.txt

Add task accomplices

POST /v1/tasks/:taskId/add-accomplices

Adds users to a task as participants on behalf of the key's user.

Parameters

Parameter Type Required Description
ParametertaskId (path) Typenumber Requiredyes DescriptionTask ID. List: GET /v1/tasks

Request fields (body)

Field Type Required Description
FieldaccomplicesIds Typenumber[] Requiredno DescriptionIDs of the users to add as participants. List: GET /v1/users. If the field is omitted or the array is empty, the participants do not change and the response contains the current task

Any field other than accomplicesIds is rejected with 400 INVALID_PARAMS.

Examples

curl — personal key

Terminal 
curl -X POST 'https://vibecode.bitrix24.com/v1/tasks/289/add-accomplices' \
  -H 'X-Api-Key: YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"accomplicesIds":[42]}'

curl — OAuth application

Terminal 
curl -X POST 'https://vibecode.bitrix24.com/v1/tasks/289/add-accomplices' \
  -H 'X-Api-Key: YOUR_APP_KEY' \
  -H 'Authorization: Bearer USER_SESSION_TOKEN' \
  -H 'Content-Type: application/json' \
  -d '{"accomplicesIds":[42]}'

JavaScript — personal key

javascript 
const response = await fetch('https://vibecode.bitrix24.com/v1/tasks/289/add-accomplices', {
  method: 'POST',
  headers: {
    'X-Api-Key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({"accomplicesIds":[42]}),
})
const result = await response.json()
console.log(result.data.task.accomplices)

JavaScript — OAuth application

javascript 
const response = await fetch('https://vibecode.bitrix24.com/v1/tasks/289/add-accomplices', {
  method: 'POST',
  headers: {
    'X-Api-Key': 'YOUR_APP_KEY',
    'Authorization': 'Bearer USER_SESSION_TOKEN',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({"accomplicesIds":[42]}),
})
const result = await response.json()
console.log(result.data.task.accomplices)

Response fields

Field Type Description
Fieldsuccess Typeboolean Descriptiontrue on success
Fielddata.task Typeobject DescriptionThe full task object after the action. Values arrive in raw form: numbers as strings ("id": "289"), flags as Y or N ("taskControl": "N"). GET /v1/tasks/:id returns the same fields as numbers and true/false
Fielddata.task.id Typestring DescriptionTask ID
Fielddata.task.accomplices Typestring[] DescriptionParticipant IDs after the call
Fielddata.task.action Typeobject DescriptionWhich actions the key's user can take after the call: the key is the action name (start, pause, complete, approve, disapprove, defer, renew and others), the value is true or false

Response example

Only the main fields of the task object are shown.

JSON 
{
  "success": true,
  "data": {
    "task": {
      "id": "289",
      "title": "Prepare the quarterly report",
      "status": "2",
      "createdBy": "1",
      "responsibleId": "1",
      "accomplices": ["42"],
      "auditors": [],
      "changedDate": "2026-10-19T17:20:02+02:00",
      "taskControl": "N",
      "action": {
        "start": true,
        "pause": false,
        "complete": true,
        "approve": false,
        "disapprove": false,
        "defer": true,
        "renew": false
      }
    }
  }
}

Error response example

422 — the task does not exist or is not accessible to the key's user:

JSON 
{
  "success": false,
  "error": {
    "code": "BITRIX_ERROR",
    "message": "Task not found or not accessible",
    "b24Code": "1"
  }
}

The error.message text comes from Bitrix24. Branch on error.code, not on the message text.

Errors

HTTP Code Description
HTTP400 CodeINVALID_PARAMS DescriptiontaskId is not a positive integer: taskId must be a positive integer
HTTP400 CodeINVALID_PARAMS DescriptionThe request body is not a JSON object: body must be an object
HTTP400 CodeINVALID_PARAMS DescriptionThe body contains fields other than accomplicesIds: body contains unsupported fields
HTTP400 CodeINVALID_PARAMS DescriptionaccomplicesIds is not an array of positive integers: accomplicesIds must be an array of positive integers
HTTP401 CodeMISSING_API_KEY DescriptionX-Api-Key is missing
HTTP401 CodeINVALID_API_KEY DescriptionThe key is not found
HTTP401 CodeTOKEN_MISSING DescriptionThe key has no valid Bitrix24 token
HTTP403 CodeSCOPE_DENIED DescriptionThe key lacks the task or tasks scope
HTTP403 CodeWRITE_BLOCKED_READONLY_KEY DescriptionThe key is read-only
HTTP403 CodeBITRIX_ACCESS_DENIED DescriptionThe key's user has no rights to the task
HTTP422 CodeBITRIX_ERROR DescriptionNo task exists with this taskId, or it is not accessible: Task not found or not accessible
HTTP422 CodeBITRIX_ERROR DescriptionBitrix24 rejected the action for another reason

The full list of common API errors — Errors.

See also