Square Inventory API is one of 45 APIs that Square publishes on the APIs.io network, described by a machine-readable OpenAPI specification and an AsyncAPI event-driven specification.
Tagged areas include Inventory. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, and an AsyncAPI specification.
This API exposes
13 operations
across 13 paths,
and defines 36 schemas.
It is described by OpenAPI 3.2.0, at version 2.0.
Requests are made against a single base URL, https://connect.squareup.com.
13 operations13 paths36 schemas7 GET6 POST
Metadata
The identity and technical contract details declared by the specification.
Square Inventory API declares
2 security schemes
for authenticating requests.
It supports OAuth 2.0 (oauth2) using the authorizationCode flow, exposing 57 scopes.
An API key is passed in the header as Authorization (oauth2ClientSecret).
Paths & Operations 13
Across 13 paths, the API surfaces 13 operations — 7 GET, 6 POST. Each is listed below with its method, path, parameters, and response codes.
The contract defines 36 schemas that model the data the API accepts and returns. The most detailed are InventoryAdjustment (19 properties), InventoryTransfer (13 properties), InventoryPhysicalCount (12 properties), MeasurementUnit (8 properties). Each schema is shown below with its type and property counts.
Currency
string
Indicates the associated currency for an amount of money. Values correspond to [ISO 4217](https://wikipedia.org/wiki/ISO4217).
MeasurementUnitUnitType
string
Describes the type of this unit and indicates which field contains the unit information. This is an ‘open’ enum.
InventoryChangeType
string
Indicates how the inventory change was applied to a tracked product quantity.
InventoryAdjustment
object
Represents a change in state or quantity of product inventory at a particular time and location.
19 properties
InventoryChange
object
Represents a single physical count, inventory, adjustment, or transfer that is part of the history of inventory changes for a particular [CatalogObject](entity…
6 properties
BatchChangeInventoryRequest
object
3 properties1 required
InventoryCount
object
Represents Square-estimated quantity of items in a particular state at a particular seller location based on the known history of physical counts and inventory…
7 properties
MeasurementUnitCustom
object
The information needed to define a custom unit, provided by the seller.
2 properties2 required
Money
object
Represents an amount of money. Money fields can be signed or unsigned. Fields that do not explicitly define whether they are signed or unsigned are considered…
2 properties
BatchRetrieveInventoryChangesRequest
object
8 properties
InventoryAdjustmentGroup
object
4 properties
Product
string
Indicates the Square product used to generate a change.
BatchRetrieveInventoryCountsResponse
object
3 properties
BatchChangeInventoryResponse
object
3 properties
MeasurementUnitGeneric
string
MeasurementUnitWeight
string
Unit of weight used to measure a quantity.
BatchRetrieveInventoryCountsRequest
object
6 properties
RetrieveInventoryAdjustmentResponse
object
2 properties
InventoryPhysicalCount
object
Represents the quantity of an item variation that is physically present at a specific location, verified by a seller or a seller's employee. For example, a phy…
12 properties
InventoryState
string
Indicates the state of a tracked item quantity in the lifecycle of goods.
CatalogMeasurementUnit
object
Represents the unit used to measure a CatalogItemVariation and specifies the precision for decimal quantities.
2 properties
MeasurementUnit
object
Represents a unit of measurement to use with a quantity, such as ounces or inches. Exactly one of the following fields are required: customunit, areaunit, leng…
8 properties
MeasurementUnitTime
string
Unit of time used to measure a quantity (a duration).
RetrieveInventoryChangesResponse
object
3 properties
RetrieveInventoryPhysicalCountResponse
object
2 properties
RetrieveInventoryCountResponse
object
3 properties
MeasurementUnitArea
string
Unit of area used to measure a quantity.
InventoryTransfer
object
Represents the transfer of a quantity of product inventory at a particular time from one location to another.
13 properties
Error
object
Represents an error encountered during a request to the Connect API. See [Handling errors](https://developer.squareup.com/docs/build-basics/handling-errors) fo…
4 properties2 required
ErrorCode
string
Indicates the specific error that occurred during a request to a Square API.
MeasurementUnitVolume
string
The unit of volume used to measure a quantity.
SourceApplication
object
Represents information about the application used to generate a change.
3 properties
BatchRetrieveInventoryChangesResponse
object
3 properties
RetrieveInventoryTransferResponse
object
2 properties
ErrorCategory
string
Indicates which high-level category of error has occurred during a request to the Connect API.
MeasurementUnitLength
string
The unit of length used to measure a quantity.
Specification
The full machine-readable OpenAPI contract behind this narrative.
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