# Trigger backfill for a server

Triggers a data backfill for a specific server registration on the FASP server. The action is audit-logged. Requires Federation.Manage permission.

RBAC: requires Federation.Manage

Endpoint: POST /api/v1/admin/fasp-remote/registrations/{serverId}/backfill
Version: 1.0
Security: header

## Path parameters:

  - `serverId` (string, required)
    Server ID to backfill

## Request fields (application/json):

  - `category` (string, required)
    Category to backfill (content/account/group; aliases: posts/users/groups)


## Response 400 fields