openapi: 3.1.0
info:
  title: NATS Monitoring HTTP Accounts Leaf Nodes API
  description: The NATS server exposes a monitoring HTTP endpoint that provides real-time server statistics including connection info, route details, subscription data, JetStream metrics, and health checks for observability and operations.
  version: 2.10.0
  contact:
    name: NATS.io
    url: https://nats.io/
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: http://localhost:8222
  description: Default NATS monitoring endpoint
tags:
- name: Leaf Nodes
paths:
  /leafz:
    get:
      summary: Leaf node information
      operationId: getLeafz
      tags:
      - Leaf Nodes
      description: Reports information about leaf node connections.
      parameters:
      - name: subs
        in: query
        schema:
          type: boolean
      responses:
        '200':
          description: Leaf node details
          content:
            application/json:
              schema:
                type: object
                properties:
                  now:
                    type: string
                  leafnodes:
                    type: integer
                  leafs:
                    type: array
                    items:
                      type: object
                      properties:
                        name:
                          type: string
                        is_spoke:
                          type: boolean
                        account:
                          type: string
                        ip:
                          type: string
                        port:
                          type: integer
                        rtt:
                          type: string
                        in_msgs:
                          type: integer
                        out_msgs:
                          type: integer
                        in_bytes:
                          type: integer
                        out_bytes:
                          type: integer
                        subscriptions:
                          type: integer