> ## 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 pricing policy > Creates a sell-side pricing policy (`product_pricing_policies` row) for a product. Each policy defines one qty-break tier on a pricing level or as a per-account override. **Required:** `product_id` AND one of (`pricing_level_id` | `account_id`). The combination of `(product_id, pricing_level_id, account_id, variant_id, min_quantity)` must be unique for active policies. Duplicate scope returns `422 duplicate_pricing_policy_for_scope`. Public field `min_quantity` maps to the canonical `qty_break` column. Hard cap: max 100 nested policy rules per request (returns 413 if exceeded). Idempotent via `Idempotency-Key` header. Requires `products:write` scope. ## OpenAPI ````yaml /openapi.yaml post /pricing-policies 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: /pricing-policies: post: tags: - Products summary: Create a pricing policy description: > Creates a sell-side pricing policy (`product_pricing_policies` row) for a product. Each policy defines one qty-break tier on a pricing level or as a per-account override. **Required:** `product_id` AND one of (`pricing_level_id` | `account_id`). The combination of `(product_id, pricing_level_id, account_id, variant_id, min_quantity)` must be unique for active policies. Duplicate scope returns `422 duplicate_pricing_policy_for_scope`. Public field `min_quantity` maps to the canonical `qty_break` column. Hard cap: max 100 nested policy rules per request (returns 413 if exceeded). Idempotent via `Idempotency-Key` header. Requires `products:write` scope. operationId: createPricingPolicy parameters: - name: Idempotency-Key in: header required: false schema: type: string requestBody: required: true content: application/json: schema: type: object required: - product_id properties: product_id: type: string format: uuid description: Product this policy applies to pricing_level_id: type: string format: uuid nullable: true description: Pricing level UUID. Required if account_id not provided. account_id: type: string format: uuid nullable: true description: >- Account-specific price override. Required if pricing_level_id not provided. variant_id: type: string format: uuid nullable: true description: Scope to a specific variant (omit for product-wide) pricing_type: type: string enum: - regular - multiplier default: regular description: >- 'regular' = absolute sell_price; 'multiplier' = sell_price derived from list_price * adjustment min_quantity: type: integer minimum: 1 default: 1 description: >- Minimum order qty to activate this tier. Must be unique per scope. sell_price: type: number format: float nullable: true description: Absolute sell price (pricing_type='regular') list_price: type: number format: float nullable: true description: List price snapshot (pricing_type='multiplier') adjustment: type: number format: float nullable: true description: Multiplier adjustment (pricing_type='multiplier') margin_pct: type: number format: float nullable: true description: Margin percentage for reference is_active: type: boolean default: true is_default: type: boolean default: false description: Mark as the default price for this product external_source: type: string nullable: true description: Source system identifier (e.g. 'versa', 'bubble') external_id: type: string nullable: true description: ID in the source system migration_batch_id: type: string format: uuid nullable: true imported_at: type: string format: date-time nullable: true example: product_id: 550e8400-e29b-41d4-a716-446655440000 pricing_level_id: 660e8400-e29b-41d4-a716-446655440001 min_quantity: 1 sell_price: 49.99 pricing_type: regular responses: '201': description: Created pricing policy content: application/json: schema: type: object properties: data: type: object '400': $ref: '#/components/responses/Error' '401': $ref: '#/components/responses/Error' '403': $ref: '#/components/responses/Error' '404': $ref: '#/components/responses/Error' '422': $ref: '#/components/responses/Error' security: - ApiKeyAuth: [] components: responses: Error: description: Error response (400/401/403/404/409/422/429/500) content: application/json: schema: $ref: '#/components/schemas/ErrorEnvelope' schemas: 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 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. ````