Add a task that this task blocks

Links the specified task as blocked by this task. Blocking can cross projects in the same workspace. A cycle is rejected with TASK_BLOCKING_CYCLE.

POST/tasks/{identifier}/blocking

Authorization

AuthorizationOAuth2 access token · headerrequired

Scopes:api:write

AuthorizationBearer token (JWT) · headerrequired

Path parameters

identifierstringrequired

Blocker task UUID or numeric shortNumber

Query parameters

fieldsToReturnstring

Comma-separated list of top-level response fields to return. Overrides the endpoint compact default unless responseShape=full is used.

responseShapestring

Advanced override. Omit for the endpoint compact default. Use full only when you need the complete endpoint response, including nested fields that are not selectable with fieldsToReturn.

Allowed:compactfull

Header parameters

LT-Response-Shapestring

Advanced override. Set to full only when you need the complete endpoint response, including nested fields that are not selectable with fieldsToReturn.

Allowed:full

Request body

requiredapplication/json

taskIdstringrequired

UUID of an existing task to link. The task must exist in the workspace. A cycle is rejected with TASK_BLOCKING_CYCLE.

Responses

200Blocking link added successfully

accountableobject

Accountable user details

accountableIdstring

Accountable user ID

assignedToobject

Assigned user details

assignedToIdstring

Assigned user ID

billedbooleanrequired

Whether task is billed

blockedByIdsstring[]required

Task IDs that currently block this task

blockingIdsstring[]required

Task IDs that this task currently blocks

childSpentTimenumberrequired

Child tasks spent time in minutes

commentsobject[]required

Task comments; each `body` is HTML and may contain the same embedded `appImage` / `appFile` / `appVideo` divs with `fileId` as the task description. Fetch binaries via authenticated `/api/public/workspace/files/{fileId}` with the same Public API Bearer token when needed.

componentItemIdobject

Component item ID

createdAtstring<date-time>required

Task creation timestamp

customFieldsobjectrequired

Custom fields values

deadlinestring<date-time>

Task deadline

descriptionstringrequired

Task description in HTML. May include embedded assets as elements such as `<div data-type="appImage" fileId="…" filename="…">` (images), `appFile`, or `appVideo`—binary content is not embedded; use authenticated GET `{appOrigin}/api/public/workspace/files/{fileId}` with the same Public API Bearer token to retrieve it.

emailDetailsobject

Email details

emailSendErrorstring

Email send error message

emailSendErrorCodestring

Email send error code

emailSendFailedAtstring<date-time>

Email send failed timestamp

emailSendFailedTostring[]

Email send failed recipients

enableSupportContingentbooleanrequired

Enable support contingent

estimatedTimenumber

Estimated time in hours

guestAccessbooleanrequired

Guest access enabled for organization members

historyobject[]required

Task history entries

iconobject

Task icon identifier in the format `:icon_name:` (e.g., `:rocket:`, `:bug:`, `:memo:`). Can be null if no custom icon is set.

iconIsGeneratingbooleanrequired

Whether icon is being generated by AI

idstringrequired

Task ID (UUID)

isBlockedbooleanrequired

True when at least one blocker is still New, In progress, Feedback, or Backlog

isChangeRequestbooleanrequired

Whether task is a change request

isParticipantbooleanrequired

Whether current user is a participant

notificationSettingsobjectrequired

Notification settings

parentTaskIdobject

Parent task ID for subtasks

participantsCountnumberrequired

Number of participants

participantsListstring[]required

List of participant user IDs

priorityobjectrequired

Task priority (TaskPriority enum)

productsobject[]required

Task products

projectobjectrequired

Project information

projectIdstringrequired

Project ID

quotationsobject[]required

Express quotations

shortNumbernumberrequired

Task short number (workspace-scoped)

skipFromBillingboolean

Skip from billing

spentTimenumberrequired

Total spent time in minutes

statusIdstringrequired

Task status ID

subTasksIdsstring[]required

Child task IDs

summarystring

Task summary

summaryIsGeneratingbooleanrequired

Whether summary is being generated by AI

tagsstring[]required

Task tags

titlestringrequired

Task title

titleIsGeneratingbooleanrequired

Whether title is being generated by AI

typeIdstringrequired

Task type ID

userIdstringrequired

Creator user ID

401Unauthorized - Invalid or missing authentication token

403Forbidden - Insufficient API scopes or permissions

Request

curl -X POST "https://leadtime.app/api/public/tasks/string/blocking" \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
  "taskId": "550e8400-e29b-41d4-a716-446655440000"
}'

const response = await fetch("https://leadtime.app/api/public/tasks/string/blocking", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_ACCESS_TOKEN",
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
  "taskId": "550e8400-e29b-41d4-a716-446655440000"
})
});

import requests

response = requests.post(
    "https://leadtime.app/api/public/tasks/string/blocking",
    headers={
        "Authorization": "Bearer YOUR_ACCESS_TOKEN",
        "Content-Type": "application/json"
    },
    json={
  "taskId": "550e8400-e29b-41d4-a716-446655440000"
},
)

Response

{
  "accountable": {},
  "accountableId": "string",
  "assignedTo": {},
  "assignedToId": "string",
  "billed": true,
  "blockedByIds": [
    "string"
  ],
  "blockingIds": [
    "string"
  ],
  "childSpentTime": 0,
  "comments": [
    {}
  ],
  "componentItemId": {},
  "createdAt": "2019-08-24T14:15:22Z",
  "customFields": {},
  "deadline": "2019-08-24T14:15:22Z",
  "description": "string",
  "emailDetails": {},
  "emailSendError": "string",
  "emailSendErrorCode": "string",
  "emailSendFailedAt": "2019-08-24T14:15:22Z",
  "emailSendFailedTo": [
    "string"
  ],
  "enableSupportContingent": true,
  "estimatedTime": 0,
  "guestAccess": true,
  "history": [
    {}
  ],
  "icon": {},
  "iconIsGenerating": true,
  "id": "string",
  "isBlocked": true,
  "isChangeRequest": true,
  "isParticipant": true,
  "notificationSettings": {},
  "parentTaskId": {},
  "participantsCount": 0,
  "participantsList": [
    "string"
  ],
  "priority": {},
  "products": [
    {}
  ],
  "project": {},
  "projectId": "string",
  "quotations": [
    {}
  ],
  "shortNumber": 0,
  "skipFromBilling": true,
  "spentTime": 0,
  "statusId": "string",
  "subTasksIds": [
    "string"
  ],
  "summary": "string",
  "summaryIsGenerating": true,
  "tags": [
    "string"
  ],
  "title": "string",
  "titleIsGenerating": true,
  "typeId": "string",
  "userId": "string"
}