Create product variant

POST/api/v1/inventory/products/variants

Create a new product variant. When the business has Stripe connected, the variant is mirrored to Stripe Catalog (Product + Price); otherwise the variant is created locally with empty Stripe IDs and can be synced later.

Operation ID: create_variant·View as markdown·OpenAPI slice

Authentication

Bearer token authentication. Pass your DayZero API token in the Authorization header and the target business UUID in x-business-id.

Request body

Schema: VariantCreateRequest

product_idstring: UUID of the parent product this variant belongs to.
unit_priceinteger: Sale price in cents (e.g., 2999 = $29.99).
unit_costinteger: Cost price in cents for margin calculations.
unit_cost_precisenumber: Precise unit cost in dollars with sub-cent precision (e.g. 0.0478 for $0.0478/gram).
namestring: Variant name (e.g., 'Large - Blue').
skustring: Stock Keeping Unit - unique identifier for inventory.
manufacturer_skustring: Manufacturer's SKU for supplier ordering.
barcodestring: Scannable barcode (UPC/EAN/QR). Distinct from SKU.
uomstring: Unit of measure: EA, LB, G, KG, OZ, L, ML, etc.
inventory_categorystring: Which inventory ledger this item's cost sits in: raw_material, packaging or finished_good. Production runs and counts post by it.
default_vendor_idstring: UUID of the preferred vendor for this variant.
tax_code_idstring: UUID of the tax code that decides whether this variant is charged sales tax on invoices. Omit for the default: taxable.
initial_inventory_quantityinteger: Starting inventory quantity.
initial_inventory_quantity_datestring · date-time: Date for the initial inventory count (ISO 8601).

Responses

201Variant created successfully

Schema: SuccessEnvelope_VariantResponse_

successboolean
messagestring
codestring
dataVariantResponse

400Bad request - invalid data

Schema: ErrorResponse

errorstringrequired: Error category: validation_error, unauthorized, forbidden, not_found, conflict, rate_limited, server_error, or service_unavailable.
messagestringrequired: Human-readable explanation, safe to show to end users.
codestringrequired: Stable machine-readable code in CATEGORY_NNN form (e.g. NOT_FOUND_006, AUTH_010, GEN_002).
request_idstring: Correlation id for support requests. Echoes the x-request-id request header when one was supplied.
errorsobject: Field-level validation messages keyed by field name. Present on 400/422 validation failures only.

401Unauthorized - Missing or expired token, an MCP OAuth token used against the REST API, or no access to this business

Schema: ErrorResponse

errorstringrequired: Error category: validation_error, unauthorized, forbidden, not_found, conflict, rate_limited, server_error, or service_unavailable.
messagestringrequired: Human-readable explanation, safe to show to end users.
codestringrequired: Stable machine-readable code in CATEGORY_NNN form (e.g. NOT_FOUND_006, AUTH_010, GEN_002).
request_idstring: Correlation id for support requests. Echoes the x-request-id request header when one was supplied.
errorsobject: Field-level validation messages keyed by field name. Present on 400/422 validation failures only.

403Forbidden - Insufficient permissions

Schema: ErrorResponse

errorstringrequired: Error category: validation_error, unauthorized, forbidden, not_found, conflict, rate_limited, server_error, or service_unavailable.
messagestringrequired: Human-readable explanation, safe to show to end users.
codestringrequired: Stable machine-readable code in CATEGORY_NNN form (e.g. NOT_FOUND_006, AUTH_010, GEN_002).
request_idstring: Correlation id for support requests. Echoes the x-request-id request header when one was supplied.
errorsobject: Field-level validation messages keyed by field name. Present on 400/422 validation failures only.

404Business or product not found

Schema: ErrorResponse

errorstringrequired: Error category: validation_error, unauthorized, forbidden, not_found, conflict, rate_limited, server_error, or service_unavailable.
messagestringrequired: Human-readable explanation, safe to show to end users.
codestringrequired: Stable machine-readable code in CATEGORY_NNN form (e.g. NOT_FOUND_006, AUTH_010, GEN_002).
request_idstring: Correlation id for support requests. Echoes the x-request-id request header when one was supplied.
errorsobject: Field-level validation messages keyed by field name. Present on 400/422 validation failures only.

409Variant with same SKU already exists

Schema: ErrorResponse

errorstringrequired: Error category: validation_error, unauthorized, forbidden, not_found, conflict, rate_limited, server_error, or service_unavailable.
messagestringrequired: Human-readable explanation, safe to show to end users.
codestringrequired: Stable machine-readable code in CATEGORY_NNN form (e.g. NOT_FOUND_006, AUTH_010, GEN_002).
request_idstring: Correlation id for support requests. Echoes the x-request-id request header when one was supplied.
errorsobject: Field-level validation messages keyed by field name. Present on 400/422 validation failures only.

422Validation error

Schema: ErrorResponse

errorstringrequired: Error category: validation_error, unauthorized, forbidden, not_found, conflict, rate_limited, server_error, or service_unavailable.
messagestringrequired: Human-readable explanation, safe to show to end users.
codestringrequired: Stable machine-readable code in CATEGORY_NNN form (e.g. NOT_FOUND_006, AUTH_010, GEN_002).
request_idstring: Correlation id for support requests. Echoes the x-request-id request header when one was supplied.
errorsobject: Field-level validation messages keyed by field name. Present on 400/422 validation failures only.

Code samples

POST/api/v1/inventory/products/variants

bash

curl -X POST 'https://api.ondayzero.com/api/v1/inventory/products/variants' \
  -H 'Authorization: Bearer dz_your_token' \
  -H 'x-business-id: YOUR_BUSINESS_ID' \
  -H 'Content-Type: application/json' \
  -d '{
  "initial_inventory_quantity": 50,
  "name": "Large - Blue",
  "product_id": "019ab37c-9a0d-7000-8000-000000000001",
  "sku": "WIDGET-PRO-LG-BLU",
  "unit_cost": 1200,
  "unit_price": 2999
}'