# Block specific user

Blocks a user, preventing all interactions between you and the blocked user. This action automatically unfollows both users from each other, removes any reposts, and removes any existing mute. For remote users, sends a Block activity via ActivityPub. Cannot block yourself.

Endpoint: POST /api/v1/block/{userId}
Version: 1.0
Security: header

## Path parameters:

  - `userId` (string, required)
    User ID to block. Must be a valid USER type TypeId.
    Example: "us_01hxcvk1hjexere4pvtrj0ymqq"

## Response 400 fields (application/json):

  - `errorCode` (string, required)
    Error code

  - `message` (string, required)
    Error message

  - `docUrl` (string)
    Link to documentation

## Response 403 fields (application/json):

  - `errorCode` (string, required)
    Error code

  - `message` (string, required)
    Error message

  - `docUrl` (string)
    Link to documentation

## Response 404 fields (application/json):

  - `errorCode` (string, required)
    Error code

  - `message` (string, required)
    Error message

  - `docUrl` (string)
    Link to documentation