openapi: 3.1.0
info:
  title: HashiCorp Nomad HTTP ACL Nodes API
  description: The HashiCorp Nomad HTTP API provides programmatic access to all Nomad functionality including job scheduling, allocation management, node operations, deployments, services, evaluations, namespaces, ACL policies, and cluster status. All API routes are prefixed with /v1/ and the default port is 4646. The API is RESTful, responds to standard HTTP verbs, and supports ACL token authentication via the X-Nomad-Token header or Bearer scheme.
  version: 1.9.0
  contact:
    name: HashiCorp Support
    url: https://support.hashicorp.com
  termsOfService: https://www.hashicorp.com/terms-of-service
  license:
    name: Business Source License 1.1
    url: https://github.com/hashicorp/nomad/blob/main/LICENSE
servers:
- url: http://localhost:4646/v1
  description: Local Nomad Agent
security:
- nomadToken: []
- bearerAuth: []
tags:
- name: Nodes
  description: Endpoints for querying and managing client nodes registered with the Nomad cluster.
paths:
  /nodes:
    get:
      operationId: listNodes
      summary: List nodes
      description: Lists all client nodes registered with Nomad. Supports prefix-based filtering on node ID.
      tags:
      - Nodes
      parameters:
      - $ref: '#/components/parameters/PrefixParam'
      - $ref: '#/components/parameters/NextTokenParam'
      - $ref: '#/components/parameters/PerPageParam'
      - $ref: '#/components/parameters/FilterParam'
      responses:
        '200':
          description: A list of node stubs
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/NodeListStub'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '500':
          $ref: '#/components/responses/InternalError'
  /node/{nodeID}:
    get:
      operationId: readNode
      summary: Read a node
      description: Returns the full details of the specified node.
      tags:
      - Nodes
      parameters:
      - $ref: '#/components/parameters/NodeIDParam'
      responses:
        '200':
          description: Node details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Node'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'
  /node/{nodeID}/evaluate:
    put:
      operationId: evaluateNode
      summary: Create a new evaluation for a node
      description: Creates a new evaluation for the specified node. This can be used to force a re-evaluation of the node and its allocations.
      tags:
      - Nodes
      parameters:
      - $ref: '#/components/parameters/NodeIDParam'
      responses:
        '200':
          description: Evaluation created
          content:
            application/json:
              schema:
                type: object
                properties:
                  EvalIDs:
                    type: array
                    items:
                      type: string
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'
  /node/{nodeID}/drain:
    post:
      operationId: drainNode
      summary: Set node drain mode
      description: Enables or disables drain mode on the specified node. When draining is enabled, no further allocations will be assigned to this node, and existing allocations will be migrated.
      tags:
      - Nodes
      parameters:
      - $ref: '#/components/parameters/NodeIDParam'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                DrainSpec:
                  type: object
                  properties:
                    Deadline:
                      type: integer
                      description: Deadline in nanoseconds for the drain to complete.
                    IgnoreSystemJobs:
                      type: boolean
                      description: If true, system jobs are not drained from the node.
                MarkEligible:
                  type: boolean
                  description: If true, marks the node as eligible for scheduling.
      responses:
        '200':
          description: Node drain updated
          content:
            application/json:
              schema:
                type: object
                properties:
                  EvalIDs:
                    type: array
                    items:
                      type: string
                  NodeModifyIndex:
                    type: integer
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'
  /node/{nodeID}/purge:
    delete:
      operationId: purgeNode
      summary: Purge a node
      description: Purges a node from the system. The node must be in a down state.
      tags:
      - Nodes
      parameters:
      - $ref: '#/components/parameters/NodeIDParam'
      responses:
        '200':
          description: Node purged
          content:
            application/json:
              schema:
                type: object
                properties:
                  EvalIDs:
                    type: array
                    items:
                      type: string
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalError'
components:
  responses:
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            type: object
            properties:
              message:
                type: string
    Unauthorized:
      description: Unauthorized - missing or invalid ACL token
      content:
        application/json:
          schema:
            type: object
            properties:
              message:
                type: string
    InternalError:
      description: Internal server error
      content:
        application/json:
          schema:
            type: object
            properties:
              message:
                type: string
  schemas:
    Node:
      type: object
      description: A Nomad client node.
      properties:
        ID:
          type: string
          description: The unique ID of the node.
        Datacenter:
          type: string
        Name:
          type: string
        NodeClass:
          type: string
        NodePool:
          type: string
        Drain:
          type: boolean
          description: Whether the node is in drain mode.
        SchedulingEligibility:
          type: string
          description: Whether the node is eligible for scheduling.
          enum:
          - eligible
          - ineligible
        Status:
          type: string
          description: The status of the node.
          enum:
          - initializing
          - ready
          - down
          - disconnected
        StatusDescription:
          type: string
        Drivers:
          type: object
          additionalProperties:
            type: object
            properties:
              Detected:
                type: boolean
              Healthy:
                type: boolean
              HealthDescription:
                type: string
        Attributes:
          type: object
          additionalProperties:
            type: string
        Resources:
          $ref: '#/components/schemas/Resources'
        Reserved:
          $ref: '#/components/schemas/Resources'
        HTTPAddr:
          type: string
        TLSEnabled:
          type: boolean
        CreateIndex:
          type: integer
        ModifyIndex:
          type: integer
    NetworkResource:
      type: object
      description: Network resource configuration.
      properties:
        Mode:
          type: string
          description: The network mode (bridge, host, cni).
        Device:
          type: string
        CIDR:
          type: string
        IP:
          type: string
        MBits:
          type: integer
        DNS:
          type: object
          properties:
            Servers:
              type: array
              items:
                type: string
        DynamicPorts:
          type: array
          items:
            type: object
            properties:
              Label:
                type: string
              Value:
                type: integer
              To:
                type: integer
              HostNetwork:
                type: string
        ReservedPorts:
          type: array
          items:
            type: object
            properties:
              Label:
                type: string
              Value:
                type: integer
              To:
                type: integer
              HostNetwork:
                type: string
    Resources:
      type: object
      description: Resource requirements for a task.
      properties:
        CPU:
          type: integer
          description: CPU required in MHz.
        Cores:
          type: integer
          description: Number of CPU cores required.
        MemoryMB:
          type: integer
          description: Memory required in MB.
        MemoryMaxMB:
          type: integer
          description: Maximum memory in MB (memory oversubscription).
        DiskMB:
          type: integer
          description: Disk space required in MB.
        Networks:
          type: array
          items:
            $ref: '#/components/schemas/NetworkResource'
    NodeListStub:
      type: object
      description: A stub representation of a node returned in list operations.
      properties:
        ID:
          type: string
        Datacenter:
          type: string
        Name:
          type: string
        NodeClass:
          type: string
        NodePool:
          type: string
        Drain:
          type: boolean
        SchedulingEligibility:
          type: string
        Status:
          type: string
        StatusDescription:
          type: string
        Version:
          type: string
        Drivers:
          type: object
          additionalProperties:
            type: object
        CreateIndex:
          type: integer
        ModifyIndex:
          type: integer
  parameters:
    PerPageParam:
      name: per_page
      in: query
      description: Maximum number of results to return per page.
      schema:
        type: integer
    NodeIDParam:
      name: nodeID
      in: path
      required: true
      description: The ID of the node.
      schema:
        type: string
    FilterParam:
      name: filter
      in: query
      description: Specifies the expression used to filter the results.
      schema:
        type: string
    NextTokenParam:
      name: next_token
      in: query
      description: Indicates where to start paging for queries that support pagination.
      schema:
        type: string
    PrefixParam:
      name: prefix
      in: query
      description: Specifies a string to filter results based on an ID prefix.
      schema:
        type: string
  securitySchemes:
    nomadToken:
      type: apiKey
      name: X-Nomad-Token
      in: header
      description: ACL token passed via the X-Nomad-Token request header.
    bearerAuth:
      type: http
      scheme: bearer
      description: ACL token passed via the Authorization header with Bearer scheme.
externalDocs:
  description: Nomad HTTP API Documentation
  url: https://developer.hashicorp.com/nomad/api-docs