Microsoft Defender for Endpoint API

naftiko: 1.0.0-alpha2
info:
  label: Microsoft Defender for Endpoint API
  description: API for endpoint detection and response, threat and vulnerability management, and automated investigation and
    remediation. Provides programmatic access to alerts, machines, and vulnerabilities managed by Microsoft Defender for Endpoint.
  tags:
  - Microsoft
  - Defender
  - API
  created: '2026-05-06'
  modified: '2026-05-06'
capability:
  consumes:
  - type: http
    namespace: microsoft-defender
    baseUri: https://api.security.microsoft.com/api
    description: Microsoft Defender for Endpoint API HTTP API.
    authentication:
      type: bearer
      token: '{{MICROSOFT_DEFENDER_TOKEN}}'
    resources:
    - name: alerts
      path: /alerts
      operations:
      - name: listalerts
        method: GET
        description: Microsoft Defender List alerts
        inputParameters:
        - name: $filter
          in: query
          type: string
          description: OData filter expression. Filterable properties include alertCreationTime, lastUpdateTime, incidentId,
            investigationId, id, assignedTo, detectionSource, lastEven
        - name: $top
          in: query
          type: integer
          description: Maximum number of results to return (max 10,000).
        - name: $skip
          in: query
          type: integer
          description: Number of results to skip for pagination.
        - name: $expand
          in: query
          type: string
          description: Expand related entities. Supports expanding evidence.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
    - name: alerts-alertid
      path: /alerts/{alertId}
      operations:
      - name: getalert
        method: GET
        description: Microsoft Defender Get alert by ID
        inputParameters:
        - name: alertId
          in: path
          type: string
          required: true
          description: The unique identifier of the alert.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
      - name: updatealert
        method: PATCH
        description: Microsoft Defender Update alert
        inputParameters:
        - name: alertId
          in: path
          type: string
          required: true
          description: The unique identifier of the alert to update.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
    - name: machines
      path: /machines
      operations:
      - name: listmachines
        method: GET
        description: Microsoft Defender List machines
        inputParameters:
        - name: $filter
          in: query
          type: string
          description: OData filter expression. Filterable properties include computerDnsName, id, version, deviceValue, aadDeviceId,
            machineTags, lastSeen, exposureLevel, onboardingS
        - name: $top
          in: query
          type: integer
          description: Maximum number of results to return (max 10,000).
        - name: $skip
          in: query
          type: integer
          description: Number of results to skip for pagination.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
    - name: machines-machineid
      path: /machines/{machineId}
      operations:
      - name: getmachine
        method: GET
        description: Microsoft Defender Get machine by ID
        inputParameters:
        - name: machineId
          in: path
          type: string
          required: true
          description: The device ID or computer name of the machine.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
    - name: machines-machineid-alerts
      path: /machines/{machineId}/alerts
      operations:
      - name: listmachinealerts
        method: GET
        description: Microsoft Defender List alerts for a machine
        inputParameters:
        - name: machineId
          in: path
          type: string
          required: true
          description: The device ID of the machine.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
    - name: machines-machineid-vulnerabilities
      path: /machines/{machineId}/vulnerabilities
      operations:
      - name: listmachinevulnerabilities
        method: GET
        description: Microsoft Defender List vulnerabilities for a machine
        inputParameters:
        - name: machineId
          in: path
          type: string
          required: true
          description: The device ID of the machine.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
    - name: vulnerabilities
      path: /vulnerabilities
      operations:
      - name: listvulnerabilities
        method: GET
        description: Microsoft Defender List all vulnerabilities
        inputParameters:
        - name: $filter
          in: query
          type: string
          description: OData filter expression. Filterable properties include id, name, description, cvssV3, publishedOn,
            severity, and updatedOn.
        - name: $top
          in: query
          type: integer
          description: Maximum number of results to return (max 8,000).
        - name: $skip
          in: query
          type: integer
          description: Number of results to skip for pagination.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
    - name: vulnerabilities-vulnerabilityid
      path: /vulnerabilities/{vulnerabilityId}
      operations:
      - name: getvulnerability
        method: GET
        description: Microsoft Defender Get vulnerability by ID
        inputParameters:
        - name: vulnerabilityId
          in: path
          type: string
          required: true
          description: The CVE identifier of the vulnerability.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
    - name: vulnerabilities-vulnerabilityid-machinereference
      path: /vulnerabilities/{vulnerabilityId}/machineReferences
      operations:
      - name: listvulnerabilitymachinereferences
        method: GET
        description: Microsoft Defender List machines affected by a vulnerability
        inputParameters:
        - name: vulnerabilityId
          in: path
          type: string
          required: true
          description: The CVE identifier of the vulnerability.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
  exposes:
  - type: rest
    port: 8080
    namespace: microsoft-defender-rest
    description: REST adapter for Microsoft Defender for Endpoint API.
    resources:
    - path: /alerts
      name: listalerts
      operations:
      - method: GET
        name: listalerts
        description: Microsoft Defender List alerts
        call: microsoft-defender.listalerts
        outputParameters:
        - type: object
          mapping: $.
    - path: /alerts/{alertId}
      name: getalert
      operations:
      - method: GET
        name: getalert
        description: Microsoft Defender Get alert by ID
        call: microsoft-defender.getalert
        with:
          alertId: rest.alertId
        outputParameters:
        - type: object
          mapping: $.
    - path: /alerts/{alertId}
      name: updatealert
      operations:
      - method: PATCH
        name: updatealert
        description: Microsoft Defender Update alert
        call: microsoft-defender.updatealert
        with:
          alertId: rest.alertId
        outputParameters:
        - type: object
          mapping: $.
    - path: /machines
      name: listmachines
      operations:
      - method: GET
        name: listmachines
        description: Microsoft Defender List machines
        call: microsoft-defender.listmachines
        outputParameters:
        - type: object
          mapping: $.
    - path: /machines/{machineId}
      name: getmachine
      operations:
      - method: GET
        name: getmachine
        description: Microsoft Defender Get machine by ID
        call: microsoft-defender.getmachine
        with:
          machineId: rest.machineId
        outputParameters:
        - type: object
          mapping: $.
    - path: /machines/{machineId}/alerts
      name: listmachinealerts
      operations:
      - method: GET
        name: listmachinealerts
        description: Microsoft Defender List alerts for a machine
        call: microsoft-defender.listmachinealerts
        with:
          machineId: rest.machineId
        outputParameters:
        - type: object
          mapping: $.
    - path: /machines/{machineId}/vulnerabilities
      name: listmachinevulnerabilities
      operations:
      - method: GET
        name: listmachinevulnerabilities
        description: Microsoft Defender List vulnerabilities for a machine
        call: microsoft-defender.listmachinevulnerabilities
        with:
          machineId: rest.machineId
        outputParameters:
        - type: object
          mapping: $.
    - path: /vulnerabilities
      name: listvulnerabilities
      operations:
      - method: GET
        name: listvulnerabilities
        description: Microsoft Defender List all vulnerabilities
        call: microsoft-defender.listvulnerabilities
        outputParameters:
        - type: object
          mapping: $.
    - path: /vulnerabilities/{vulnerabilityId}
      name: getvulnerability
      operations:
      - method: GET
        name: getvulnerability
        description: Microsoft Defender Get vulnerability by ID
        call: microsoft-defender.getvulnerability
        with:
          vulnerabilityId: rest.vulnerabilityId
        outputParameters:
        - type: object
          mapping: $.
    - path: /vulnerabilities/{vulnerabilityId}/machineReferences
      name: listvulnerabilitymachinereferences
      operations:
      - method: GET
        name: listvulnerabilitymachinereferences
        description: Microsoft Defender List machines affected by a vulnerability
        call: microsoft-defender.listvulnerabilitymachinereferences
        with:
          vulnerabilityId: rest.vulnerabilityId
        outputParameters:
        - type: object
          mapping: $.
  - type: mcp
    port: 9090
    namespace: microsoft-defender-mcp
    transport: http
    description: MCP adapter for Microsoft Defender for Endpoint API for AI agent use.
    tools:
    - name: listalerts
      description: Microsoft Defender List alerts
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: microsoft-defender.listalerts
      with:
        $filter: tools.$filter
        $top: tools.$top
        $skip: tools.$skip
        $expand: tools.$expand
      inputParameters:
      - name: $filter
        type: string
        description: OData filter expression. Filterable properties include alertCreationTime, lastUpdateTime, incidentId,
          investigationId, id, assignedTo, detectionSource, lastEven
      - name: $top
        type: integer
        description: Maximum number of results to return (max 10,000).
      - name: $skip
        type: integer
        description: Number of results to skip for pagination.
      - name: $expand
        type: string
        description: Expand related entities. Supports expanding evidence.
      outputParameters:
      - type: object
        mapping: $.
    - name: getalert
      description: Microsoft Defender Get alert by ID
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: microsoft-defender.getalert
      with:
        alertId: tools.alertId
      inputParameters:
      - name: alertId
        type: string
        description: The unique identifier of the alert.
        required: true
      outputParameters:
      - type: object
        mapping: $.
    - name: updatealert
      description: Microsoft Defender Update alert
      hints:
        readOnly: false
        destructive: false
        idempotent: false
      call: microsoft-defender.updatealert
      with:
        alertId: tools.alertId
      inputParameters:
      - name: alertId
        type: string
        description: The unique identifier of the alert to update.
        required: true
      outputParameters:
      - type: object
        mapping: $.
    - name: listmachines
      description: Microsoft Defender List machines
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: microsoft-defender.listmachines
      with:
        $filter: tools.$filter
        $top: tools.$top
        $skip: tools.$skip
      inputParameters:
      - name: $filter
        type: string
        description: OData filter expression. Filterable properties include computerDnsName, id, version, deviceValue, aadDeviceId,
          machineTags, lastSeen, exposureLevel, onboardingS
      - name: $top
        type: integer
        description: Maximum number of results to return (max 10,000).
      - name: $skip
        type: integer
        description: Number of results to skip for pagination.
      outputParameters:
      - type: object
        mapping: $.
    - name: getmachine
      description: Microsoft Defender Get machine by ID
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: microsoft-defender.getmachine
      with:
        machineId: tools.machineId
      inputParameters:
      - name: machineId
        type: string
        description: The device ID or computer name of the machine.
        required: true
      outputParameters:
      - type: object
        mapping: $.
    - name: listmachinealerts
      description: Microsoft Defender List alerts for a machine
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: microsoft-defender.listmachinealerts
      with:
        machineId: tools.machineId
      inputParameters:
      - name: machineId
        type: string
        description: The device ID of the machine.
        required: true
      outputParameters:
      - type: object
        mapping: $.
    - name: listmachinevulnerabilities
      description: Microsoft Defender List vulnerabilities for a machine
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: microsoft-defender.listmachinevulnerabilities
      with:
        machineId: tools.machineId
      inputParameters:
      - name: machineId
        type: string
        description: The device ID of the machine.
        required: true
      outputParameters:
      - type: object
        mapping: $.
    - name: listvulnerabilities
      description: Microsoft Defender List all vulnerabilities
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: microsoft-defender.listvulnerabilities
      with:
        $filter: tools.$filter
        $top: tools.$top
        $skip: tools.$skip
      inputParameters:
      - name: $filter
        type: string
        description: OData filter expression. Filterable properties include id, name, description, cvssV3, publishedOn, severity,
          and updatedOn.
      - name: $top
        type: integer
        description: Maximum number of results to return (max 8,000).
      - name: $skip
        type: integer
        description: Number of results to skip for pagination.
      outputParameters:
      - type: object
        mapping: $.
    - name: getvulnerability
      description: Microsoft Defender Get vulnerability by ID
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: microsoft-defender.getvulnerability
      with:
        vulnerabilityId: tools.vulnerabilityId
      inputParameters:
      - name: vulnerabilityId
        type: string
        description: The CVE identifier of the vulnerability.
        required: true
      outputParameters:
      - type: object
        mapping: $.
    - name: listvulnerabilitymachinereferences
      description: Microsoft Defender List machines affected by a vulnerability
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: microsoft-defender.listvulnerabilitymachinereferences
      with:
        vulnerabilityId: tools.vulnerabilityId
      inputParameters:
      - name: vulnerabilityId
        type: string
        description: The CVE identifier of the vulnerability.
        required: true
      outputParameters:
      - type: object
        mapping: $.
binds:
- namespace: env
  keys:
    MICROSOFT_DEFENDER_TOKEN: MICROSOFT_DEFENDER_TOKEN