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

# Create Source System

Source systems represent external integrations that connect to TimeLockData via API keys. Each source system has a permission level:

* **I** (Insert) -- Can create evidences and categories
* **U** (Update) -- Can create and update
* **R** (Read) -- Read-only access
* **A** (Admin) -- Full access


## OpenAPI

````yaml POST /sourceSystem/{COMPANY_ID}
openapi: 3.0.0
info:
  title: TimeLockData API
  description: Public API for evidence management and blockchain traceability
  version: 1.0.0
  contact: {}
servers:
  - url: https://api.timelockdata.com/api/v1
    description: Production
security: []
tags: []
paths:
  /sourceSystem/{COMPANY_ID}:
    post:
      tags:
        - Source System
      summary: Add a source system
      operationId: SourceSystemController_addSourceSystem
      parameters:
        - name: COMPANY_ID
          required: true
          in: path
          description: Company identifier
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AddSourceSystemRequest'
      responses:
        '201':
          description: Source system created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AddSourceSystemResponse'
        '400':
          description: Invalid request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      security: []
components:
  schemas:
    AddSourceSystemRequest:
      type: object
      properties:
        name:
          type: string
          description: Name of the source system
        permissions:
          type: string
          description: Permission level for the source system
          enum:
            - I
            - U
            - R
            - A
        apiKey:
          type: string
          description: API key for the source system
      required:
        - name
        - permissions
    AddSourceSystemResponse:
      type: object
      properties:
        id:
          type: string
          description: ID of the newly created source system
      required:
        - id
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
          description: Error message
        code:
          type: string
          description: Error code
      required:
        - error

````