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

# List an interface’s security groups

<Info>
  Requires the IAM action **`network:ListInterfaceSecurityGroups`**. See [NETWORK permissions](/networking/permissions) for the full list, what each one covers, and an example policy.
</Info>


## OpenAPI

````yaml /api-reference/specs/network.yaml get /v1/interfaces/{interface_id}/security-groups
openapi: 3.0.3
info:
  title: Basaltic Network API
  version: 1.0.0
  description: |
    The VPC surface — networks and subnets, interfaces, route tables,
    security groups, internet, NAT and egress-only gateways, and floating
    IPs.

    Relationship inputs use one reference field: UUID, CRN, or an exact name
    when the request supplies its required parent scope. Subnets and route
    tables are VPC-scoped; interfaces are subnet-scoped. Nested CRNs use
    vpc/<vpc>/subnet/<subnet>, vpc/<vpc>/route-table/<table>, and
    vpc/<vpc>/subnet/<subnet>/interface/<interface>. Names are immutable.
    Unknown request fields and list parameters are rejected.
    Supplied empty references are invalid and failed lookups never fall back
    to another reference kind. Every list accepts exact name and crn filters.
  contact:
    name: Basaltic Support
    email: ping@basaltic.sh
  license:
    name: Proprietary
    url: https://basaltic.sh/terms
servers:
  - url: https://network.{region}.basaltic.sh
    description: Regional API endpoint
    variables:
      region:
        default: sa-saopaulo-1
        description: Region code
security:
  - BearerAuth: []
paths:
  /v1/interfaces/{interface_id}/security-groups:
    get:
      tags:
        - Networking
      summary: List an interface’s security groups
      operationId: listInterfaceSecurityGroups
      parameters:
        - name: name
          in: query
          description: Exact resource name.
          schema:
            type: string
        - name: crn
          in: query
          description: >-
            Exact CRN, validated against the endpoint type, region and caller
            account. Valid foreign or mismatched CRNs return an empty result;
            malformed or flat child CRNs return 400. Filters are conjunctive.
          schema:
            type: string
        - $ref: '#/components/parameters/Marker'
        - $ref: '#/components/parameters/Limit'
        - $ref: '#/components/parameters/InterfaceId'
      responses:
        '200':
          description: Security groups attached to the interface
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SecurityGroupListResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
        '500':
          $ref: '#/components/responses/InternalServerError'
      security:
        - BearerAuth: []
components:
  parameters:
    Marker:
      name: marker
      in: query
      description: >-
        Opaque pagination cursor. Echo back the `meta.marker` value from the
        previous page to fetch the next one; do not construct or parse it. The
        token's internal form varies by endpoint (a resource ID, a timestamp, …)
        and is not guaranteed stable across releases.
      required: false
      schema:
        type: string
      example: 550e8400-e29b-41d4-a716-446655440000
    Limit:
      name: limit
      in: query
      description: >-
        Maximum number of items to return. A value above the maximum is clamped
        to it rather than rejected, so a page shorter than the one you asked for
        is normal — page until `meta.has_more` is false, not until a page looks
        short.
      required: false
      schema:
        type: integer
        minimum: 1
        maximum: 100
        default: 20
      example: 20
    InterfaceId:
      name: interface_id
      in: path
      description: Interface ID
      required: true
      schema:
        type: string
        format: uuid
      example: 550e8400-e29b-41d4-a716-446655440000
  schemas:
    SecurityGroupListResponse:
      type: object
      required:
        - security_groups
        - meta
      properties:
        security_groups:
          type: array
          items:
            $ref: '#/components/schemas/SecurityGroup'
        meta:
          $ref: '#/components/schemas/PaginationMeta'
    SecurityGroup:
      type: object
      required:
        - id
        - crn
        - name
        - tags
        - created_at
        - updated_at
      properties:
        id:
          type: string
          format: uuid
          readOnly: true
        crn:
          type: string
          readOnly: true
          example: crn:network:sa-saopaulo-1:my-account:security-group/web
        name:
          description: >-
            Resource names must not start with the literal crn: prefix or be
            UUIDs (canonical, compact, braced, or urn:uuid: forms, in either
            case).
          type: string
          example: web
        description:
          type: string
          example: Allow HTTPS from anywhere to the web tier
        tags:
          type: object
          additionalProperties:
            type: string
        created_at:
          type: string
          format: date-time
          readOnly: true
        updated_at:
          type: string
          format: date-time
          readOnly: true
    PaginationMeta:
      type: object
      properties:
        total:
          type: integer
          description: Total number of items
          example: 150
        limit:
          type: integer
          description: Number of items per page
          example: 20
        marker:
          type: string
          description: >-
            Opaque cursor for the next page. Pass it back as the `marker` query
            parameter; treat it as a token, not a value to parse.
          example: 550e8400-e29b-41d4-a716-446655440000
        has_more:
          type: boolean
          description: Whether there are more items
          example: true
    Error:
      type: object
      required:
        - error
      properties:
        error:
          type: object
          required:
            - code
            - message
            - request_id
          properties:
            code:
              type: string
              description: Error code identifying the type of error
              example: INVALID_INPUT
            message:
              type: string
              description: Human-readable error message
              example: Invalid request parameters
            params:
              type: object
              additionalProperties: true
              description: >-
                Optional non-sensitive values for interpolation of localized
                errors, keyed by error code. Never present for server errors.
              example:
                instances: 2
                pools: 0
            request_id:
              type: string
              format: uuid
              description: Request ID for debugging
              example: 550e8400-e29b-41d4-a716-446655440000
  responses:
    BadRequest:
      description: Invalid request parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: INVALID_INPUT
              message: Invalid request parameters
              request_id: 550e8400-e29b-41d4-a716-446655440000
    Unauthorized:
      description: Authentication required or token invalid
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: UNAUTHORIZED
              message: Authentication required
              request_id: 550e8400-e29b-41d4-a716-446655440000
    Forbidden:
      description: Insufficient permissions
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: ACCESS_DENIED
              message: You don't have permission to perform this action
              request_id: 550e8400-e29b-41d4-a716-446655440000
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: NOT_FOUND
              message: Resource not found
              request_id: 550e8400-e29b-41d4-a716-446655440000
    InternalServerError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: INTERNAL_ERROR
              message: An internal error occurred
              request_id: 550e8400-e29b-41d4-a716-446655440000
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: |
        An OAuth 2.0 bearer token, sent as `Authorization: Bearer <token>`.
        This is the recommended way to authenticate.

        Get one by exchanging a service account's access key pair at
        `POST /v1/oauth/token` with `grant_type=client_credentials`. It is the
        standard client-credentials grant, so any OAuth-aware library will
        obtain and refresh it for you.

        ```
        curl -s -u "$KEY_ID:$SECRET" -d grant_type=client_credentials \
          https://iam.basaltic.sh/v1/oauth/token
        ```

        Tokens last an hour by default. The same access key pair is separately
        your AWS SigV4 credential for the S3-compatible object endpoint, which
        speaks nothing else.

````

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