> ## Documentation Index > Fetch the complete documentation index at: https://docs.omneo.io/llms.txt > Use this file to discover all available pages before exploring further. # Add Transaction Item > A `GET` to the `/transactions/{transactionId}/items` endpoint allows your application to add an Item (Products) to a Transaction record. ## OpenAPI ````yaml post /v3/transactions/{transaction}/items openapi: 3.1.0 info: title: Omneo version: 0.0.1 servers: - url: https://api.{tenant}.getomneo.com/api variables: tenant: default: example security: [] paths: /v3/transactions/{transaction}/items: post: tags: - Transaction Item summary: Add Transaction Item description: >- A `GET` to the `/transactions/{transactionId}/items` endpoint allows your application to add an Item (Products) to a Transaction record. operationId: transactions.items.store parameters: - name: transaction in: path required: true description: The transaction ID schema: type: integer requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/StoreTransactionItem' responses: '200': description: '`TransactionItem`' content: application/json: schema: type: object properties: data: $ref: '#/components/schemas/TransactionItem' required: - data '401': $ref: '#/components/responses/AuthenticationException' '403': $ref: '#/components/responses/AuthorizationException' '404': $ref: '#/components/responses/ModelNotFoundException' '422': $ref: '#/components/responses/ValidationException' components: schemas: StoreTransactionItem: type: object properties: name: type: string product_variant_id: type: integer quantity: type: integer is_void: type: - boolean - 'null' price_current: type: number price_sell: type: number price_original: type: - number - 'null' price_margin: type: - number - 'null' tags: type: array items: type: string required: - name - product_variant_id - quantity - price_current - price_sell title: StoreTransactionItem TransactionItem: type: object properties: id: type: integer external_id: type: - string - 'null' name: type: string transaction_id: type: integer product_id: type: - integer - 'null' product_variant_id: type: - integer - 'null' sku: type: - string - 'null' variant_external_id: type: - string - 'null' is_void: type: boolean quantity: type: integer price_current: type: - number - 'null' price_sell: type: number price_original: type: - number - 'null' price_margin: type: - number - 'null' price_tax: type: - number - 'null' is_return: type: string discounts: type: - array - 'null' items: {} department: type: - string - 'null' meta: type: - array - 'null' items: {} product_images: type: object order_id: type: - integer - 'null' created_at: type: string updated_at: type: string pivot: anyOf: - type: object properties: created_at: type: string updated_at: type: string required: - created_at - updated_at - type: array items: type: string minItems: 0 maxItems: 0 additionalItems: false product_variant: $ref: '#/components/schemas/ProductVariant' product: type: object properties: title: type: - string - 'null' department: type: - string - 'null' brand: type: - string - 'null' custom_fields: type: array items: $ref: '#/components/schemas/CustomField' required: - title - department - brand - custom_fields transaction: type: object properties: transacted_at: type: string receipt_ref: type: - string - 'null' external_id: type: - string - 'null' location: type: - object - 'null' properties: id: type: integer type: type: - string - 'null' name: type: - string - 'null' description: type: - string - 'null' phone: type: - string - 'null' email: type: - string - 'null' external_id: type: - string - 'null' is_published: type: boolean is_permanently_closed: type: boolean address: $ref: '#/components/schemas/Address' required: - id - type - name - description - phone - email - external_id - is_published - is_permanently_closed - address required: - transacted_at - receipt_ref - external_id - location list_items: type: array items: $ref: '#/components/schemas/TransactionItemProductListItem' required: - id - external_id - name - transaction_id - product_id - product_variant_id - sku - variant_external_id - is_void - quantity - price_current - price_sell - price_original - price_margin - price_tax - is_return - discounts - department - meta - product_images - order_id - created_at - updated_at - pivot - product_variant - product - transaction - list_items title: TransactionItem ProductVariant: type: object properties: id: type: integer product_id: type: integer sku: type: string external_id: type: - string - 'null' barcode: type: - string - 'null' web_url: type: - string - 'null' handle: type: - string - 'null' title: type: - string - 'null' description: type: - string - 'null' position: type: integer price: type: number price_discounted: type: - number - 'null' price_comparison: type: - number - 'null' price_cost: type: - number - 'null' available_quantity: type: - integer - 'null' images: type: string meta: type: - array - 'null' items: {} tags: type: array items: $ref: '#/components/schemas/Tag' options: type: array items: $ref: '#/components/schemas/ProductOption' created_at: type: string updated_at: type: string deleted_at: type: string required: - id - product_id - sku - external_id - barcode - web_url - handle - title - description - position - price - price_discounted - price_comparison - price_cost - available_quantity - images - meta - tags - options - created_at - updated_at - deleted_at title: ProductVariant CustomField: type: object properties: name: type: - string - 'null' handle: type: string namespace: type: string value: type: string type: type: string custom_fieldable_type: type: string custom_fieldable: anyOf: - type: 'null' - $ref: '#/components/schemas/TransactionBasic' - type: object properties: id: type: integer address_line_1: type: string address_line_2: type: string address_line_3: type: string city: type: string postcode: type: string state: type: string country: type: string phone: type: string external_id: type: string iso: type: string iso_state: type: string profile_id: type: string required: - id - address_line_1 - address_line_2 - address_line_3 - city - postcode - state - country - phone - external_id - iso - iso_state - profile_id created_at: type: string updated_at: type: string is_index: type: - integer - 'null' required: - name - handle - namespace - value - type - custom_fieldable_type - custom_fieldable - created_at - updated_at - is_index title: CustomField Address: type: object properties: id: type: integer address_line_1: type: string address_line_2: type: - string - 'null' address_line_3: type: - string - 'null' company: type: - string - 'null' latitude: type: - number - 'null' longitude: type: - number - 'null' city: type: string postcode: type: string state: type: - string - 'null' country: type: string notes: type: - string - 'null' external_id: type: - string - 'null' is_default: type: boolean created_at: type: string updated_at: type: string meta: type: - array - 'null' items: {} name: type: - string - 'null' type: type: - string - 'null' phone: type: - string - 'null' iso: type: - string - 'null' iso_state: type: - string - 'null' profile_id: type: - string - 'null' custom_fields: type: object additionalProperties: {} required: - id - address_line_1 - address_line_2 - address_line_3 - company - latitude - longitude - city - postcode - state - country - notes - external_id - is_default - created_at - updated_at - meta - name - type - phone - iso - iso_state - profile_id - custom_fields title: Address TransactionItemProductListItem: type: object properties: id: type: string product_list_id: type: string list: anyOf: - type: object properties: name: type: string handle: type: string description: type: string required: - name - handle - description - type: array items: type: string minItems: 0 maxItems: 0 additionalItems: false created_at: type: string updated_at: type: string quantity: type: string position: type: string status: type: string meta: type: string pivot: anyOf: - type: object properties: created_at: type: string updated_at: type: string required: - created_at - updated_at - type: array items: type: string minItems: 0 maxItems: 0 additionalItems: false required: - id - product_list_id - list - created_at - updated_at - quantity - position - status - meta - pivot title: TransactionItemProductListItem Tag: type: string title: Tag ProductOption: type: object properties: name: type: string value: type: string sort_order: type: - integer - 'null' required: - name - value - sort_order title: ProductOption TransactionBasic: type: object properties: id: type: string external_id: type: string profile_id: type: string meta: type: string total: type: string total_original: type: string rounding: type: string margin: type: string is_void: type: string transacted_at: type: string timezone: type: string payments: type: string receipt_is_email: type: string receipt_ref: type: string linked_receipt_ref: type: string claimed_at: type: string receipt_email: type: string currency_id: type: string currency_rate: type: string currency: type: string type: type: string status: type: string order_number: type: string order_id: type: string external_order_id: type: string created_at: type: string updated_at: type: string required: - id - external_id - profile_id - meta - total - total_original - rounding - margin - is_void - transacted_at - timezone - payments - receipt_is_email - receipt_ref - linked_receipt_ref - claimed_at - receipt_email - currency_id - currency_rate - currency - type - status - order_number - order_id - external_order_id - created_at - updated_at title: TransactionBasic responses: AuthenticationException: description: Unauthenticated content: application/json: schema: type: object properties: message: type: string description: Error overview. required: - message AuthorizationException: description: Authorization error content: application/json: schema: type: object properties: message: type: string description: Error overview. required: - message ModelNotFoundException: description: Not found content: application/json: schema: type: object properties: message: type: string description: Error overview. required: - message ValidationException: description: Validation error content: application/json: schema: type: object properties: message: type: string description: Errors overview. errors: type: object description: A detailed description of each field that failed validation. additionalProperties: type: array items: type: string required: - message - errors ````