# Get metadata query usage count

Returns the number of categories that currently use this metadata query.
Features: - Efficient counting using SQL COUNT queries with JOIN - Returns exact count of categories bound to the metadata query - Useful for impact analysis before metadata query changes - Supports ontology change management workflows
Use Cases: - Determine impact before deleting a metadata query - Analyze metadata query usage across categories - Support ontology change management decisions - Dashboard statistics for metadata query utilization
Example Usage: - GET /accounts/acc-12345678/ontologies/ont-87654321/metadata-queries/123e4567-e89b-12d3-a456-426614174000/usage-count
Response: Returns a simple count object indicating how many categories are currently bound to this metadata query.
Performance: - Optimized for large ontologies using database indexes - Uses SQL COUNT with JOIN for efficient counting - Returns exact counts without loading category data into memory

Endpoint: GET /accounts/{accountId}/ontologies/{ontologyId}/metadata-queries/{metadataQueryId}/usage-count
Version: 1.0.0
Security: bearerAuth

## Path parameters:

  - `accountId` (string, required)
    Short account ID with scd- prefix
    Example: "scd-k2j8n4m1"

  - `ontologyId` (string, required)
    The ID of the ontology

  - `metadataQueryId` (string, required)
    The ID of the metadata query

## Response 200 fields (application/json):

  - `count` (integer, required)
    Number of categories that use this metadata query
    Example: 3


## Response 401 fields

## Response 404 fields