> ## Documentation Index > Fetch the complete documentation index at: https://docs.tryreplicas.com/llms.txt > Use this file to discover all available pages before exploring further. # Create Environment Variable > Adds a new variable to the environment. Values are encrypted at rest. The `(environment, key)` pair must be unique within the org. Source-backed personal environments can override inherited variable keys only when the inherited variable has `personal_override_allowed: true`. ## OpenAPI ````yaml /openapi.json post /v1/environments/{environmentId}/variables openapi: 3.1.0 info: title: Replica API version: 2.0.0 description: >- The Replica API allows you to programmatically manage cloud workspaces for AI agents. Use this API to manage environments (the org-scoped primitive workspaces are created from — including variables, files, skills, MCPs, warm hooks, start hooks, and warm pools), create and manage replicas, send messages, manage chats, stream events, read connected repositories and repository sets, and configure automations. servers: - url: https://api.tryreplicas.com description: Production API security: - apiKey: [] tags: - name: Environments description: >- Manage environments — the primitive that workspaces are created from. Variables, files, skills, MCPs, warm-hooks, and warm-pools are all scoped to an environment. Every organization has a singleton Global environment whose values apply to every workspace. Personal environments are scoped to the authenticated user and can be standalone or source-backed by a team environment. - name: Repository description: >- Read repositories and repository sets connected to your organization. Repositories are the underlying GitHub-connection layer; bind them to an environment to use them in workspaces. - name: Replica description: >- Manage replicas (workspaces) for AI agents. `/v1/replica` endpoints accept API keys and workspace engine-secret authentication; user-session JWTs are not accepted. - name: Terminal description: Manage interactive terminal sessions in active workspaces - name: Preview description: Manage public preview URLs for workspace ports - name: Profile description: Read and update the authenticated user's profile - name: Credentials description: >- Manage coding-agent credentials for an organization or the authenticated user - name: Google Search Console description: >- Read Search Console properties, performance, sitemaps, and URL inspection results through a connected Google account - name: Slack description: Connect Slack identities and route threads to Replicas workspaces - name: Linear description: Connect Linear identities to Replicas accounts - name: Automation description: >- Create and manage automations that trigger replicas on a schedule or in response to events - name: Downloads description: Download Replicas applications - name: Media description: >- Read workspace media and obtain short-lived download or inline preview URLs - name: Analytics description: >- Read aggregated activity and usage metrics for your organization: compute minutes, workspaces created by source, and pull request throughput over a time range. - name: Presence description: >- Read and report ephemeral member presence: who is online, where they are (environment or workspace), and whether they are typing. Presence is backed by short-lived keys rather than the database and broadcast to other members over the events stream. paths: /v1/environments/{environmentId}/variables: post: tags: - Environments summary: Create Environment Variable description: >- Adds a new variable to the environment. Values are encrypted at rest. The `(environment, key)` pair must be unique within the org. Source-backed personal environments can override inherited variable keys only when the inherited variable has `personal_override_allowed: true`. operationId: createEnvironmentVariable parameters: - name: environmentId in: path required: true description: >- Environment UUID, or the literal string `global` for the org's Global environment. schema: type: string requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CreateEnvironmentVariableRequest' responses: '201': description: Variable created content: application/json: schema: $ref: '#/components/schemas/EnvironmentVariableResponse' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '403': description: Admin access required to change personal override policy content: application/json: schema: $ref: '#/components/schemas/Error' '409': $ref: '#/components/responses/Conflict' '500': $ref: '#/components/responses/InternalServerError' components: schemas: CreateEnvironmentVariableRequest: type: object description: Request body for creating an environment variable. properties: key: type: string description: Variable name value: type: string description: Variable value (encrypted at rest) personal_override_allowed: type: boolean description: >- Team/Global variables only. Allows source-backed personal environments to override this inherited key. required: - key - value EnvironmentVariableResponse: type: object properties: environment_variable: $ref: '#/components/schemas/EnvironmentVariable' required: - environment_variable Error: type: object properties: error: type: string description: Error message details: type: - string - 'null' description: Additional error details required: - error EnvironmentVariable: type: object description: >- An environment variable. Values are encrypted at rest and decrypted on read. properties: id: type: string format: uuid organization_id: type: string format: uuid environment_id: type: string format: uuid key: type: string description: Variable name (e.g. `DATABASE_URL`) value: type: string description: Variable value (returned in plaintext) personal_override_allowed: type: boolean description: >- Whether source-backed personal environments may override this inherited key created_at: type: string format: date-time updated_at: type: string format: date-time required: - id - organization_id - environment_id - key - value - personal_override_allowed - created_at - updated_at responses: BadRequest: description: Bad request - Missing or invalid parameters content: application/json: schema: $ref: '#/components/schemas/Error' Unauthorized: description: Unauthorized - Invalid or missing API key content: application/json: schema: $ref: '#/components/schemas/Error' Conflict: description: >- Conflict - Resource already exists or operation conflicts with current state content: application/json: schema: $ref: '#/components/schemas/Error' InternalServerError: description: Internal server error content: application/json: schema: $ref: '#/components/schemas/Error' securitySchemes: apiKey: type: http scheme: bearer description: >- API key authentication. Obtain your API key from the Replicas dashboard under Organization → Settings → API Keys. User-session JWTs are not accepted by `/v1/replica` endpoints. ````