---
search:
  tags:
    - tasks
    - POST
seo:
  description: >-
    Links an existing task as a blocker of the specified task.… Reference for
    the POST /tasks/{identifier}/blocked-by endpoint in the Leadtime Public API.
sidebar:
  label: Add a blocker to a task
  badge: POST
title: Add a blocker to a task
type: openapi-operation
---
Links an existing task as a blocker of the specified task. Blocking can cross projects in the same workspace. A cycle is rejected with TASK_BLOCKING_CYCLE. Requires Tasks.editAnyTitleAndDescription permission.

`POST /tasks/{identifier}/blocked-by`