> ## Documentation Index
> Fetch the complete documentation index at: https://strattumai.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# List node labels from the active ontology

> Parses the active graph_mapping YAML and returns the list of node labels. Returns an empty list if no ontology is configured.



## OpenAPI

````yaml /api-reference/memory-api.json get /v1/ontology/nodes
openapi: 3.1.0
info:
  title: Strattum Memory API
  description: >-
    REST API that serves entity context — profile, timeline, graph, sources and
    formatted context — for agents and UIs. (PRD-003, Workstream 1.3)
  version: 1.0.0
servers: []
security: []
paths:
  /v1/ontology/nodes:
    get:
      tags:
        - ontology
      summary: List node labels from the active ontology
      description: >-
        Parses the active graph_mapping YAML and returns the list of node
        labels. Returns an empty list if no ontology is configured.
      operationId: get_ontology_nodes_v1_ontology_nodes_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OntologyNodesResponse'
components:
  schemas:
    OntologyNodesResponse:
      properties:
        labels:
          items:
            type: string
          type: array
          title: Labels
      type: object
      required:
        - labels
      title: OntologyNodesResponse
      description: List of node labels defined in the active ontology.

````