vendure/modules/core/api/product/product.api.graphql

type Query {
    products(lang: LanguageCode): [Product]
    product(id: Int!, lang: LanguageCode): Product
}

type Mutation {
    "Create a new Product"
    createProduct(input: CreateProductInput): Product
    "Update an existing Product"
    updateProduct(input: UpdateProductInput): Product
}