> ## Documentation Index > Fetch the complete documentation index at: https://docs.batchrelay.com/llms.txt > Use this file to discover all available pages before exploring further. # Create an isolated Test Mode session > Creates a short-lived anonymous Test Mode bearer session for evaluation. The session is isolated from every other session and cannot access Live Mode, billing, studios, or events. Calls must use the public API host so the edge can apply abuse controls. ## OpenAPI ````yaml https://api.batchrelay.com/openapi.json post /v1/anonymous-sessions openapi: 3.1.0 info: description: >- Provider-neutral print catalog and prepared-media validation. This document covers only routes owned by the Go service; it deliberately excludes migration-proxied order lifecycle routes and all provider payloads. license: name: Proprietary url: https://github.com/SENTINELITE/Batch-Relay-Go/blob/main/README.md title: Batch Relay API version: 1.0.1 servers: - url: https://api.batchrelay.com security: [] tags: - description: Service health and the public API description. name: System - description: Test Mode session creation and API credential entry points. name: Authentication - description: >- Provider-neutral canonical catalog resources and platform-owned semantic definitions. name: Catalog - description: Studio-scoped guest checkout-link management. name: Checkout links - description: >- One-way operational event messages. Alert emails contain no message body and recipients read messages after Batch Relay authentication. name: Studio messages - description: >- Explicit, reviewable sandbox-to-Live promotion plans for forms, catalog, and storefront configuration. name: Sandbox promotions - description: Provider-neutral validation, quoting, and order lifecycle operations. name: Print orders - description: Managed fulfillment asset ingestion and metadata. name: Managed assets - description: Studio-scoped original asset upload sessions and objects. name: Studio assets - description: Prepared and confirmed event roster team changes. name: Event team changes - description: Authenticated studio, event, and form-management operations. name: Studio management - description: >- Authenticated studio retail catalog management. Draft and publication lifecycles are explicit per product or package. name: Studio catalog - description: >- Authenticated singular storefront assortment management. PATCH atomically publishes a new immutable assortment revision; no storefront draft lifecycle exists yet. name: Storefront - description: Managed media used by the studio retail catalog. name: Studio catalog assets - description: Template rendering job creation and retrieval. name: Template renders - description: >- Published browser-side template packages and short-lived server proof renders. Preview artifacts are never fulfillment artwork. name: Browser previews - description: API account and credential administration. name: API accounts paths: /v1/anonymous-sessions: parameters: - $ref: '#/components/parameters/ClientSurface' - $ref: '#/components/parameters/ClientVersion' - $ref: '#/components/parameters/InvocationMode' post: tags: - Authentication summary: Create an isolated Test Mode session description: >- Creates a short-lived anonymous Test Mode bearer session for evaluation. The session is isolated from every other session and cannot access Live Mode, billing, studios, or events. Calls must use the public API host so the edge can apply abuse controls. operationId: createAnonymousSession responses: '201': content: application/json: schema: $ref: '#/components/schemas/AnonymousSession' description: >- New anonymous Test Mode session. Save session_token as a bearer credential; it is returned only once. headers: Cache-Control: description: The token response must not be cached. schema: const: no-store type: string '429': content: application/json: schema: $ref: '#/components/schemas/Error' description: Anonymous session capacity has been reached. headers: Retry-After: schema: minimum: 1 type: integer '503': content: application/json: schema: $ref: '#/components/schemas/Error' description: Anonymous sessions are temporarily unavailable. security: [] components: parameters: ClientSurface: description: >- Untrusted optional analytics hint naming the calling client surface. It never affects authorization, routing, pricing, or behavior. in: header name: X-BatchRelay-Client-Surface required: false schema: maxLength: 100 minLength: 1 type: string ClientVersion: description: >- Untrusted optional analytics hint naming the calling client version. It never affects authorization, routing, pricing, or behavior. in: header name: X-BatchRelay-Client-Version required: false schema: maxLength: 100 minLength: 1 type: string InvocationMode: description: >- Untrusted optional analytics hint naming the invocation mode. It never affects authorization, routing, pricing, or behavior. in: header name: X-BatchRelay-Invocation-Mode required: false schema: maxLength: 100 minLength: 1 type: string schemas: AnonymousSession: additionalProperties: false properties: environment: const: sandbox type: string expires_at: format: date-time type: string scopes: items: enum: - print_orders:read - print_orders:write - usage:read type: string maxItems: 3 minItems: 3 type: array session_token: description: >- Bearer token returned once at creation. Store it securely and do not log it. pattern: ^br_anon_ type: string writeOnly: true required: - session_token - environment - expires_at - scopes type: object Error: additionalProperties: false properties: code: description: Stable machine-readable error code. type: string docs_url: format: uri type: string error: description: Backward-compatible human-readable error. type: string message: type: string request_id: type: string required: - error - code - message - docs_url - request_id type: object ````