> ## 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 protocols

> Returns a paginated list of registered protocols.



## OpenAPI

````yaml /products/link/openapi.yaml get /api/admin/protocols
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/protocols:
    get:
      tags:
        - Protocols
      summary: List protocols
      description: Returns a paginated list of registered protocols.
      operationId: protocols_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/ProtocolListResponse'
          description: Protocol list
        '401':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Unauthorized
        '403':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
          description: Forbidden
        '422':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ValidationErrors'
          description: Validation error
      callbacks: {}
      security:
        - bearerAuth: []
components:
  schemas:
    ProtocolListResponse:
      description: Paginated list of protocols.
      properties:
        data:
          items:
            $ref: '#/components/schemas/ProtocolSummary'
          type: array
        links:
          nullable: true
          properties:
            next:
              nullable: true
              type: string
          type: object
      required:
        - data
        - links
      title: ProtocolListResponse
      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
    ValidationErrors:
      description: Response shape for request validation failures.
      properties:
        classifier:
          example: VALIDATION_ERROR
          type: string
        code:
          example: 422
          type: integer
        validation_errors:
          items:
            properties:
              message:
                example: url is required
                type: string
              path:
                example: url
                nullable: true
                type: string
            type: object
          type: array
      required:
        - classifier
        - code
        - validation_errors
      title: ValidationErrors
      type: object
    ProtocolSummary:
      description: Summary of an imported or created protocol.
      properties:
        id:
          format: uuid
          type: string
        inserted_at:
          format: date-time
          type: string
        local_id:
          example: specter-v1
          type: string
        name:
          example: Specter Risk Assessment
          type: string
        url:
          example: https://developer.hellgate.io/protocols/specter/v1
          type: string
        version:
          example: '1'
          type: string
      required:
        - id
        - local_id
        - url
        - name
        - version
        - inserted_at
      title: ProtocolSummary
      type: object
  securitySchemes:
    bearerAuth:
      bearerFormat: JWT
      scheme: bearer
      type: http

````