> ## Documentation Index > Fetch the complete documentation index at: https://docs.barndoor.ai/llms.txt > Use this file to discover all available pages before exploring further. # Create a model access policy > Either an allowlist (only listed targets are permitted) or a denylist (listed targets are blocked). Targets can specify a model alias, an upstream model, a provider, or a (provider, model) combination. ## OpenAPI ````yaml api-reference/llm-gateway-openapi.yml post /admin/model-access openapi: 3.1.0 info: title: Barndoor LLM Gateway API version: 1.0.0 description: > REST API for the Barndoor LLM Gateway: configure providers, model routes, pricing, governance, and operate a multi-provider LLM platform programmatically. All endpoints in this document are scoped to your organization. They are the same APIs powering the Barndoor portal under **LLM Configuration**, **LLM Controls**, and **Settings - My Models**, exposed for teams that prefer scripting over the UI. ## Base URL All requests are issued against your Barndoor instance: ``` https://app.barndoor.ai/api/llm-gateway ``` Replace `app.barndoor.ai` with your tenant host if you run on Enterprise. ## Authentication Endpoints accept a JWT Bearer token issued by your Barndoor identity provider. Tokens can be obtained interactively via the Barndoor SDK: ```ts const sdk = await loginInteractive(); ``` The token must be sent in the `Authorization` header on every request: ``` Authorization: Bearer eyJhbGciOi... ``` Note: the `bd-...` API keys you create through these endpoints are for runtime LLM traffic (`/v1/chat/completions`, `/v1/messages`, etc.), not for administrative calls. Administrative endpoints require a user/admin JWT. ## Permissions Most endpoints require an `admin` (or higher) role on the calling user. Read-only endpoints are typically accessible by all authenticated users. Read-only listings under `/user/...` are scoped to the authenticated user. ## Errors Errors are returned as JSON with a stable shape: ```json { "error": "BadRequest", "message": "request_timeout_secs must be between 1 and 3600" } ``` contact: name: Barndoor Support url: https://barndoor.ai servers: - url: https://{host}/api/llm-gateway description: >- Production / Trial (Barndoor SaaS). The gateway lives on your Barndoor control-plane host. For Enterprise or self-hosted deployments, replace the host with your portal hostname — the authoritative value is shown on Settings → My Models in the portal. variables: host: description: Your Barndoor control-plane (portal) hostname default: app.barndoor.ai - url: https://app.barndooruat.com/api/llm-gateway description: UAT - url: https://app.barndoordev.com/api/llm-gateway description: Dev security: - BearerAuth: [] tags: - name: Credentials description: >- Reusable upstream credentials (API keys, AWS roles, Vertex service accounts) - name: Providers description: Named upstream providers backed by credentials and a model family - name: Provider Catalog description: Read-only catalog of supported upstream provider templates - name: Model Routes description: Map client-facing aliases to one or more upstream provider/model pairs - name: Model Pricing description: Per-million-token input/output costs for usage and budget reporting - name: Rate Limits description: Requests-per-minute and tokens-per-minute caps - name: Token Budgets description: Daily, weekly, or monthly token and cost ceilings - name: Model Access description: Allowlist or denylist policies for models, providers, or aliases - name: Smart Models description: Routing policies that pick a target model based on the request - name: Governance Configuration description: Org-wide behavior toggles for the LLM Gateway - name: Route Health description: Operational view of upstream route ejection and recovery - name: API Keys description: Org-managed gateway API keys (the `bd-...` keys callers send on `/v1/...`) - name: User description: Self-service endpoints for the authenticated user paths: /admin/model-access: post: tags: - Model Access summary: Create a model access policy description: | Either an allowlist (only listed targets are permitted) or a denylist (listed targets are blocked). Targets can specify a model alias, an upstream model, a provider, or a (provider, model) combination. operationId: createModelAccessPolicy requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CreateModelAccessRequest' responses: '200': description: The newly created policy content: application/json: schema: $ref: '#/components/schemas/ModelAccessPolicy' '400': $ref: '#/components/responses/BadRequest' components: schemas: CreateModelAccessRequest: type: object required: - name - scope_type - policy_type - targets properties: name: type: string scope_type: type: string scope_id: type: string format: uuid nullable: true scope_value: type: string nullable: true policy_type: type: string enum: - allowlist - denylist targets: type: array minItems: 1 items: $ref: '#/components/schemas/ModelAccessTarget' traffic_type: type: string enum: - llm - all default: llm ModelAccessPolicy: type: object required: - id - org_id - name - scope_type - policy_type - targets - traffic_type - enabled properties: id: type: string format: uuid org_id: type: string format: uuid name: type: string scope_type: type: string enum: - org - team - user - project - api_key - mcp_server - agent - role - group scope_id: type: string format: uuid nullable: true scope_value: type: string nullable: true policy_type: type: string enum: - allowlist - denylist targets: type: array items: $ref: '#/components/schemas/ModelAccessTarget' traffic_type: type: string enum: - llm - all enabled: type: boolean ModelAccessTarget: oneOf: - type: object required: - kind - alias properties: kind: type: string enum: - model_alias alias: type: string description: User-facing alias (supports trailing `*` wildcard) example: gpt-4o-mini - type: object required: - kind - model properties: kind: type: string enum: - model model: type: string description: Resolved upstream model id (supports trailing `*` wildcard) example: gpt-4o-mini-2024-07-18 - type: object required: - kind - provider_id properties: kind: type: string enum: - provider provider_id: type: string format: uuid - type: object required: - kind - provider_id - model properties: kind: type: string enum: - provider_model provider_id: type: string format: uuid model: type: string Error: type: object required: - error - message properties: error: type: string description: A short machine-readable error code example: BadRequest message: type: string description: A human-readable description of what went wrong example: request_timeout_secs must be between 1 and 3600 responses: BadRequest: description: The request body or query parameters were invalid content: application/json: schema: $ref: '#/components/schemas/Error' securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: JWT description: | JWT obtained through Barndoor's authentication flow. Pass the token verbatim in `Authorization: Bearer `. Use the Barndoor SDK's `loginInteractive()` helper to obtain a token in scripts and notebooks. ````