{ "openapi": "3.0.2", "info": { "title": "Klaviyo API", "version": "2026-07-15", "description": "The Klaviyo REST API. Please visit https://developers.klaviyo.com for more details.", "contact": { "name": "Klaviyo Developer Experience Team", "email": "developers@klaviyo.com", "url": "https://developers.klaviyo.com" }, "termsOfService": "https://www.klaviyo.com/legal/api-terms", "license": { "name": "License", "url": "https://www.klaviyo.com/legal" } }, "servers": [ { "url": "https://a.klaviyo.com", "description": "Production" } ], "security": [ { "Klaviyo-API-Key": [] } ], "paths": { "/api/catalog-items/{id}/relationships/categories": { "get": { "operationId": "get_category_ids_for_catalog_item", "summary": "Get Category IDs for Catalog Item", "description": "Get all catalog categories that a particular item is in. Returns a maximum of 100 categories per request.

*Rate limits*:
Burst: `350/s`
Steady: `3500/m`\n\n**Scopes:**\n`catalogs:read`\n\n[OpenAPI Spec](https://raw.githubusercontent.com/klaviyo/openapi/main/openapi/stable/apis/get_category_ids_for_catalog_item.json)", "parameters": [ { "name": "id", "in": "path", "description": "The catalog item ID is a compound ID (string), with format: `{integration}:::{catalog}:::{external_id}`. Currently, the only supported integration type is `$custom`, and the only supported catalog is `$default`.", "required": true, "schema": { "description": "The catalog item ID is a compound ID (string), with format: `{integration}:::{catalog}:::{external_id}`. Currently, the only supported integration type is `$custom`, and the only supported catalog is `$default`.", "type": "string", "example": "$custom:::$default:::SAMPLE-DATA-ITEM-1", "nullable": true } }, { "name": "filter", "in": "query", "description": "For more information please visit https://developers.klaviyo.com/en/v2026-07-15/reference/api-overview#filtering
Allowed field(s)/operator(s):
`ids`: `any` (string)
`item.id`: `equals` (string)
`name`: `contains` (string)", "schema": { "type": "string", "example": "any(ids,['$custom:::$default:::SAMPLE-DATA-CATEGORY-APPAREL'])" } }, { "name": "page[cursor]", "in": "query", "description": "For more information please visit https://developers.klaviyo.com/en/v2026-07-15/reference/api-overview#pagination", "required": false, "schema": { "type": "string" } }, { "name": "page[size]", "in": "query", "description": "Default: 100. Min: 1. Max: 100.", "required": false, "schema": { "type": "integer", "default": 100, "maximum": 100, "minimum": 1 } }, { "name": "sort", "in": "query", "description": "For more information please visit https://developers.klaviyo.com/en/v2026-07-15/reference/api-overview#sorting", "schema": { "type": "string", "enum": [ "created", "-created" ] } }, { "name": "revision", "in": "header", "description": "API endpoint revision (format: YYYY-MM-DD[.suffix])", "required": true, "schema": { "type": "string", "default": "2026-07-15" } } ], "responses": { "200": { "description": "Success", "content": { "application/vnd.api+json": { "schema": { "$ref": "#/components/schemas/GetCatalogItemCategoriesRelationshipsResponseCollection" } } } }, "4XX": { "$ref": "#/components/responses/ClientError" }, "5XX": { "$ref": "#/components/responses/ServerError" } }, "tags": [ "Catalogs" ], "x-klaviyo-filters": { "ids": { "operators": { "list": [ "any" ] }, "value": { "type": "string" } }, "item.id": { "operators": { "single": [ "equals" ] }, "value": { "type": "string" } }, "name": { "operators": { "single": [ "contains" ] }, "value": { "type": "string" } } }, "x-klaviyo-operation-aliases": [ "get_catalog_item_relationships_categories" ], "x-klaviyo-pre-release": "None", "x-klaviyo-ratelimit": { "burst": "350/s", "steady": "3500/m" }, "x-klaviyo-scopes": [ "catalogs:read" ], "x-klaviyo-subtag": "Items" } } }, "components": { "responses": { "ClientError": { "description": "Client Error", "content": { "application/vnd.api+json": { "schema": { "type": "object", "properties": { "errors": { "type": "array", "items": { "type": "object", "required": [ "id", "code", "title", "detail" ], "properties": { "id": { "type": "string" }, "code": { "type": "string" }, "title": { "type": "string" }, "detail": { "type": "string" }, "source": { "type": "object", "properties": { "pointer": { "type": "string" }, "parameter": { "type": "string" } } } } } } }, "required": [ "errors" ] } } } }, "ServerError": { "description": "Server Error", "content": { "application/vnd.api+json": { "schema": { "type": "object", "properties": { "errors": { "type": "array", "items": { "type": "object", "required": [ "id", "code", "title", "detail" ], "properties": { "id": { "type": "string" }, "code": { "type": "string" }, "title": { "type": "string" }, "detail": { "type": "string" }, "source": { "type": "object", "properties": { "pointer": { "type": "string" }, "parameter": { "type": "string" } } } } } } }, "required": [ "errors" ] } } } } }, "schemas": { "AgentHints": { "description": "Optional hints emitted by the API for agent callers", "type": "object", "properties": { "next_steps": { "description": "Suggested follow-up actions for agents to take after this response", "type": "array", "items": { "type": "string" } } } }, "CatalogCategoryEnum": { "type": "string", "enum": [ "catalog-category" ] }, "CollectionLinks": { "type": "object", "properties": { "self": { "type": "string", "format": "uri" }, "prev": { "type": "string", "format": "uri" }, "next": { "type": "string", "format": "uri" } }, "required": [ "self" ] }, "GetCatalogItemCategoriesRelationshipsResponseCollection": { "type": "object", "properties": { "data": { "type": "array", "items": { "type": "object", "required": [ "type", "id" ], "properties": { "type": { "$ref": "#/components/schemas/CatalogCategoryEnum" }, "id": { "description": "The catalog category ID is a compound ID (string), with format: `{integration}:::{catalog}:::{external_id}`. Currently, the only supported integration type is `$custom`, and the only supported catalog is `$default`.", "type": "string", "example": "$custom:::$default:::SAMPLE-DATA-CATEGORY-APPAREL" } } } }, "links": { "$ref": "#/components/schemas/CollectionLinks" }, "meta": { "$ref": "#/components/schemas/ResponseMeta" } }, "required": [ "data" ] }, "ResponseMeta": { "description": "Response-level metadata", "type": "object", "properties": { "agent_hints": { "$ref": "#/components/schemas/AgentHints" } } } }, "securitySchemes": { "Klaviyo-API-Key": { "type": "apiKey", "in": "header", "name": "Authorization", "description": "Private key authentication for /api/ endpoints is performed by setting the `Authorization` header to `Klaviyo-API-Key your-private-api-key`
For more information please visit https://developers.klaviyo.com/en/v2026-07-15/reference/api-overview#authentication", "x-default": "Klaviyo-API-Key your-private-api-key" } } }, "tags": [ { "name": "Catalogs", "description": "catalogs" } ] }