> ## Documentation Index > Fetch the complete documentation index at: https://docs.arcuserp.com/llms.txt > Use this file to discover all available pages before exploring further. # Create a bin > Creates a warehouse bin under a location. `bin_code` must be unique per location. Idempotent on `Idempotency-Key`. Requires the `bins:write` scope. ## OpenAPI ````yaml /openapi.yaml post /bins openapi: 3.1.0 info: title: Arcus ERP Public API version: 1.0.0 description: > Arcus ERP public REST API. Designed for external integrations and data migration. **Authentication.** Bearer token (API key) via the `Authorization` header. Format: `Authorization: Bearer ark_live_ent__` (or `ark_test_*` for sandbox). API keys are issued per-entity in **Settings > Developers > API Keys**. **Entity scoping.** The entity is encoded in the API key prefix; routes are flat (e.g. `/v1/accounts`, `/v1/orders`, `/v1/products`). A small set of platform endpoints (migration, reconciliation, events, webhook endpoints, API keys) use the `/v1/entities/{entity_id}/...` form -- those are noted in their tags. **Key capabilities.** - Related-resource hydration via `?expand[]=` (see `x-arcus-expand` on each resource). - Cursor-based pagination (`starting_after` / `ending_before` / `limit`). - Idempotency via the `Idempotency-Key` header. - Webhook events for asynchronous notification. - Conditional requests / ETag for cache validation. servers: - url: https://api.arcuserp.com/v1 description: Arcus ERP API (accepts both live `ark_live_*` and test `ark_test_*` keys) - url: https://dev-api.arcuserp.com/v1 description: >- Dev sandbox API (test-only data, accepts `ark_test_*` keys against dev RDS) security: [] paths: /bins: post: tags: - Bins summary: Create a bin description: | Creates a warehouse bin under a location. `bin_code` must be unique per location. Idempotent on `Idempotency-Key`. Requires the `bins:write` scope. operationId: createBinV1 parameters: - $ref: '#/components/parameters/IdempotencyKey' requestBody: required: true content: application/json: schema: type: object required: - location_id - bin_code properties: location_id: type: string format: uuid bin_code: type: string description: 1..50 chars. zone: type: string nullable: true aisle: type: string nullable: true shelf: type: string nullable: true rack: type: string nullable: true position: type: string nullable: true bin_type: type: string nullable: true example: storage is_default: type: boolean default: false sort_order: type: integer default: 0 max_weight: type: number format: float nullable: true max_volume: type: number format: float nullable: true responses: '201': description: Created bin content: application/json: schema: $ref: '#/components/schemas/Bin' '400': $ref: '#/components/responses/Error' '409': description: bin_code already exists for this location content: application/json: schema: $ref: '#/components/schemas/Error' security: - ApiKeyAuth: - bins:write components: parameters: IdempotencyKey: name: Idempotency-Key in: header required: false description: | Client-generated unique key for idempotent POST/PATCH/DELETE operations. Alias for the Idempotency parameter. Max 255 chars. On retry with the same key, the original response is returned without re-executing the operation. Keys expire after 24 hours. schema: type: string maxLength: 255 schemas: Bin: type: object description: > A warehouse bin location (zone/aisle/shelf/rack/position addressable). Bins belong to a `location_id` (Layer 4 scope). Deactivate is the soft-delete path; restore is the reverse. The sub-resource `/bins/{id}/products` tracks product-bin assignments (binned_products), where each row carries quantity and an `is_default_bin` flag. Scope: bins:read / bins:write / bins:delete. properties: id: type: string format: uuid readOnly: true object: type: string example: bin entity_id: type: string format: uuid readOnly: true location_id: type: string format: uuid description: Layer 4 warehouse scope. Required. bin_code: type: string description: Operator-defined code unique per location. 1..50 chars. zone: type: string nullable: true aisle: type: string nullable: true shelf: type: string nullable: true rack: type: string nullable: true position: type: string nullable: true bin_type: type: string nullable: true description: >- Bin role hint (storage, pick, receiving, staging, etc.). Default `storage`. example: storage is_active: type: boolean default: true description: False = deactivated. Restore flips back to true. is_default: type: boolean default: false description: Marks the default bin for the location. At most one per location. sort_order: type: integer default: 0 max_weight: type: number format: float nullable: true description: Optional capacity hint (lb). max_volume: type: number format: float nullable: true description: Optional capacity hint (cubic in). created_at: type: string format: date-time readOnly: true Error: description: | Alias for ErrorEnvelope. Canonical error response shape used by all API endpoints. Refer to ErrorEnvelope for the full field definition. allOf: - $ref: '#/components/schemas/ErrorEnvelope' ErrorEnvelope: type: object description: | Canonical error response envelope. All API errors use this shape. required: - error - code properties: error: type: string description: Machine-readable error key example: not_found code: type: string description: Machine-readable error code (often same as error) example: not_found type: type: string enum: - validation_error - permission_error - not_found - conflict - rate_limit - internal - expand_error - not_implemented example: not_found hint: type: string description: Human-readable one-sentence explanation (English) example: >- The requested order does not exist or does not belong to this entity. param: type: string description: The parameter that caused the error, if applicable example: expand[0] required: type: string description: The scope required (only on insufficient_scope errors) example: accounts:read request_id: type: string description: >- Unique request ID for support tracing (maps to CloudWatch log stream) example: req_abc123 responses: Error: description: Error response (400/401/403/404/409/422/429/500) content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' securitySchemes: ApiKeyAuth: type: http scheme: bearer description: | API key issued per entity via Settings > Developers > API Keys. Each key carries scopes (e.g. orders:read, products:write). Bearer token format: Authorization: Bearer ark_live_ent__ Test keys use ark_test_ent__. Both are issued per entity via Settings > Developers > API Keys. ````