> ## Documentation Index
> Fetch the complete documentation index at: https://microstrate-1133-notifications-prefs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Get a node

> Retrieves a specific node by subject



## OpenAPI

````yaml /api-reference/endpoint/hub-flows/openapi.json get /hub/nodes/{collection_topic}/{node_topic}
openapi: 3.0.0
info:
  title: quiva.ai Gateway
  description: API for managing collections, nodes, and workflows in quiva.ai Hub
  version: 0.1.0
  contact:
    name: quiva.ai Support
servers:
  - url: https://api.quiva.ai
    description: Production API server
security:
  - bearerAuth: []
  - apiKeyAuth: []
tags:
  - name: Collections
    description: Operations related to collections
  - name: Nodes
    description: Operations related to nodes
  - name: Workflows
    description: Operations related to workflows
  - name: Oauth
    description: Oauth configurations and connections
paths:
  /hub/nodes/{collection_topic}/{node_topic}:
    parameters:
      - $ref: '#/components/parameters/collectionTopic'
      - $ref: '#/components/parameters/nodeTopic'
    get:
      tags:
        - Nodes
      summary: Get a node
      description: Retrieves a specific node by subject
      operationId: getNode
      responses:
        '200':
          description: Node retrieved successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GetNodeResponse'
              examples:
                FunctionNode:
                  summary: Retrieved function node
                  value:
                    subject: ms.hub.config.node.805092869.98765432
                    data:
                      id: '98765432'
                      name: ProcessPayment
                      description: Processes a payment transaction via Stripe
                      node_type: function
                      subject: quiva-function.stripe-charge
                      payload:
                        amount: '{{trigger.amount}}'
                        currency: '{{trigger.currency}}'
                        customer_id: '{{trigger.customer_id}}'
                      options:
                        timeout: 30000
                        attempts: 3
                        backoff_ms: 1000
                        ignore_response_codes:
                          - 404
                          - 429
                    modified: 1748533179
                MapNode:
                  summary: Retrieved map node
                  value:
                    subject: ms.hub.config.node.1025086208.55667788
                    data:
                      id: '55667788'
                      name: TransformOrderData
                      description: Transforms order data structure
                      node_type: map
                      payload:
                        order_id: '{{trigger.id}}'
                        total: '{{trigger.items | sum(''price'')}}'
                        customer_email: '{{trigger.customer.email}}'
                      response_map:
                        processed_order: '{{result}}'
                    modified: 1748533200
                ConditionNode:
                  summary: Retrieved condition node
                  value:
                    subject: ms.hub.config.node.805092869.33445566
                    data:
                      id: '33445566'
                      name: CheckOrderValue
                      description: Routes orders based on value threshold
                      node_type: condition
                      payload:
                        condition: '{{trigger.total > 1000}}'
                    modified: 1748533250
                FlowNode:
                  summary: Retrieved flow invocation node
                  value:
                    subject: ms.hub.config.node.805092869.77889900
                    data:
                      id: '77889900'
                      name: TriggerNotificationFlow
                      description: Invokes notification workflow asynchronously
                      node_type: flow
                      subject: ms.hub.config.workflow.1508781670.notify
                      payload:
                        recipient: '{{trigger.email}}'
                        message: '{{trigger.message}}'
                      await: false
                      options:
                        timeout: 60000
                    modified: 1748533300
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              examples:
                InvalidSubject:
                  value:
                    error: invalid subject
components:
  parameters:
    collectionTopic:
      name: collection_topic
      in: path
      description: >-
        The topic is a hash of the name that was used when a collection was
        created
      required: true
      schema:
        type: string
      example: '1234567890'
    nodeTopic:
      name: node_topic
      in: path
      description: Node topic - hash of the names the node was created with
      required: true
      schema:
        type: string
      example: '98765432'
  schemas:
    GetNodeResponse:
      type: object
      properties:
        subject:
          type: string
          description: Subject identifier for the node
        data:
          $ref: '#/components/schemas/NodeData'
        modified:
          $ref: '#/components/schemas/Modified'
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
          description: Error message
    NodeData:
      type: object
      properties:
        id:
          type: string
          description: Unique identifier for the node
        name:
          type: string
          description: Name of the node
        description:
          type: string
          description: Description of the node
        node_type:
          type: string
          enum:
            - function
            - flow
            - condition
            - map
            - eval
            - integration
          description: >-
            ## Node Types


            ### 1. `function`

            **Definition**:  

            A **Hydra function node** used to provide a *subject* or perform a
            custom computation. It encapsulates reusable logic defined within
            the Hydra platform.


            ### 2. `flow`

            **Definition**:  

            A node that **invokes another flow**, either **synchronously** or
            **asynchronously**, enabling flow modularization and reuse.


            ### 3. `condition`

            **Definition**:  

            A **branching node** that evaluates a condition to determine the
            **flow of execution**, similar to `if`/`else` logic in programming.


            ### 4. `map`

            **Definition**:  

            A **data transformation node** used to **reshape or remap the
            payload**, allowing the flow to adapt the structure of data as it
            progresses.


            ### 5. `eval`

            **Definition**:  

            Executes **simple JavaScript code** to dynamically **evaluate
            expressions**, perform calculations, or manipulate data inline
            within the flow.


            ### 6. `integration`

            **Definition**:  

            Similar to a `function` node, but specifically tied to **predefined
            APIs**. It uses an HTTP-like interface and references **a known set
            of external services** managed by the platform.
        subject:
          type: string
          description: Subject identifier for function or flow node types
        payload:
          description: Payload data for the node
        response_map:
          description: Mapping for response transformation
        options:
          $ref: '#/components/schemas/NodeOptions'
        await:
          type: boolean
          description: Whether to wait for completion nad return the result
    Modified:
      type: integer
      description: Timestamp of last modification
    NodeOptions:
      type: object
      description: Node execution options
      properties:
        flat_map:
          type: boolean
          description: Whether to flatten the response
        backoff_ms:
          type: integer
          format: int64
          description: >-
            Backoff duration in milliseconds - how long to wait before next
            attempt. Applies to function and flow nodes only.
        timeout:
          type: integer
          format: int64
          description: >-
            Timeout duration in milliseconds. Applies to function and flow nodes
            only.
        attempts:
          type: integer
          format: int32
          description: Number of retry attempts. Applies to function and flow nodes only.
        ignore_response_codes:
          type: array
          items:
            type: integer
          description: >-
            List of HTTP response codes to ignore. Applies to function nodes
            only.
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: JWT Authorization header using the Bearer scheme
    apiKeyAuth:
      type: apiKey
      in: header
      name: X-Api-Key

````