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

# Get auth



## OpenAPI

````yaml get /auth/{TARGET_SYSTEM}
openapi: 3.0.0
info:
  title: Maesn unified API
  description: The Maesn unified API description
  version: '1.0'
  contact: {}
servers:
  - url: https://api.maesn.dev
security: []
tags:
  - name: maesn
    description: ''
paths:
  /auth/{TARGET_SYSTEM}:
    get:
      tags:
        - auth
      operationId: systemLoginUrl
      parameters:
        - name: TARGET_SYSTEM
          required: true
          in: path
          schema:
            type: string
        - name: X-API-KEY
          description: API key
          in: header
          schema:
            type: string
          required: true
        - name: callbackUrl
          required: false
          in: query
          schema:
            type: string
        - name: cancelCallbackUrl
          required: false
          in: query
          schema:
            type: string
        - name: companyId
          required: false
          in: query
          schema:
            type: string
        - name: tenantId
          required: false
          in: query
          schema:
            type: string
        - name: environmentSelection
          required: false
          in: query
          schema:
            type: boolean
        - name: include_signature
          required: false
          in: query
          schema:
            type: boolean
      responses:
        '200':
          description: Successful response
          content:
            text/html:
              schema:
                type: string
                example: https://login-url.com

````