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

# List backends



## OpenAPI

````yaml /products/link/openapi.yaml get /api/admin/backends
openapi: 3.0.0
info:
  description: >-
    Admin API for managing Link protocols and backends (Bundled and Standalone
    editions).
  title: Link API
  version: '1.0'
servers:
  - url: https://{instance}.{env}.on-hellgate.cloud
    description: Managed instance of Link
    variables:
      instance:
        default: my-instance
        description: Your unique instance slug, provided during onboarding.
      env:
        default: eu1
        description: Deployment environment (currently eu1).
security: []
tags: []
paths:
  /api/admin/backends:
    get:
      tags:
        - Backends
      summary: List backends
      operationId: backends_list
      parameters:
        - description: Pagination cursor
          in: query
          name: after
          required: false
          schema:
            type: string
        - description: Page size (default 20)
          in: query
          name: limit
          required: false
          schema:
            type: integer
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BackendListResponse'
          description: Backend list
        '401':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Unauthorized
        '403':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Forbidden
      callbacks: {}
      security:
        - bearerAuth: []
components:
  schemas:
    BackendListResponse:
      properties:
        data:
          items:
            $ref: '#/components/schemas/BackendSummary'
          type: array
        links:
          nullable: true
          properties:
            next:
              nullable: true
              type: string
          type: object
      required:
        - data
        - links
      title: BackendListResponse
      type: object
    Error:
      description: Generic error response.
      properties:
        classifier:
          example: NOT_FOUND
          type: string
        code:
          example: 404
          type: integer
        message:
          example: The requested resource does not exist
          type: string
      required:
        - classifier
        - code
        - message
      title: Error
      type: object
    BackendSummary:
      properties:
        auth_pipeline:
          $ref: '#/components/schemas/AuthPipeline'
        enabled:
          type: boolean
        host:
          example: apitest.cybersource.com
          type: string
        id:
          example: vdm
          type: string
        inserted_at:
          format: date-time
          type: string
        name:
          example: CyberSource VDM
          type: string
        protocol:
          type: string
      title: BackendSummary
      type: object
    AuthPipeline:
      properties:
        date_header:
          description: Header name for the date value
          type: string
        extra_headers:
          additionalProperties:
            type: string
          description: Additional headers appended to requests
          type: object
        header_values:
          additionalProperties:
            type: string
          description: Static header values
          type: object
        method:
          description: HTTP method override (default POST)
          type: string
        signed_headers:
          description: Headers to include in HMAC signature
          items:
            type: string
          type: array
        token_prefix:
          description: >-
            Token prefix for bearer auth (default: "Bearer", use "token" for
            Ravelin)
          type: string
        type:
          description: Authentication strategy
          enum:
            - hmac_sha256
            - basic
            - bearer
          type: string
      required:
        - type
      title: AuthPipeline
      type: object
  securitySchemes:
    bearerAuth:
      bearerFormat: JWT
      scheme: bearer
      type: http

````