> ## 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.

# Detach an interface from a running instance

> Hot-unplugs the network interface from the instance, then
tears down the interface, its address allocation, and any
security-group bindings. Refuses to detach the only NIC on
the instance.


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


## OpenAPI

````yaml /api-reference/specs/compute.yaml delete /v1/instances/{instance_id}/interfaces/{interface_id}
openapi: 3.0.3
info:
  title: Basaltic Compute API
  version: 1.0.0
  description: |
    Virtual machine instances, and the images, flavors and
    instance pools they are built from. Covers the whole instance lifecycle:
    start, stop, reboot, resize and reinstall.
  contact:
    name: Basaltic Support
    email: ping@basaltic.sh
  license:
    name: Proprietary
    url: https://basaltic.sh/terms
servers:
  - url: https://compute.{region}.basaltic.sh
    description: Regional API endpoint
    variables:
      region:
        default: sa-saopaulo-1
        description: Region code
security:
  - BearerAuth: []
paths:
  /v1/instances/{instance_id}/interfaces/{interface_id}:
    delete:
      tags:
        - Compute
      summary: Detach an interface from a running instance
      description: |
        Hot-unplugs the network interface from the instance, then
        tears down the interface, its address allocation, and any
        security-group bindings. Refuses to detach the only NIC on
        the instance.
      operationId: detachInstanceInterface
      parameters:
        - $ref: '#/components/parameters/InstanceId'
        - name: interface_id
          in: path
          required: true
          schema:
            type: string
            format: uuid
            example: e8a1c2d3-4b5f-4a6e-9c0d-1e2f3a4b5c6d
      responses:
        '202':
          description: Detach accepted
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
        '409':
          description: Instance state or last-NIC conflict
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          $ref: '#/components/responses/InternalServerError'
      security:
        - BearerAuth: []
components:
  parameters:
    InstanceId:
      name: instance_id
      in: path
      description: Instance ID
      required: true
      schema:
        type: string
        format: uuid
      example: 550e8400-e29b-41d4-a716-446655440000
  responses:
    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
  schemas:
    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
  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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