fakestore_update_product

Modify product details like title, price, description, image, or category in the Fake Store API simulation for testing and development purposes.

Instructions

Update an existing product (simulation - does not persist)

Input Schema

TableJSON Schema

Name	Required	Description
`id`	Yes	Product ID to update
`title`	No	New product title
`price`	No	New product price
`description`	No	New product description
`image`	No	New product image URL
`category`	No	New product category

Implementation Reference

src/tools/products.ts:95-117 (handler)

The core handler function implementing the fakestore_update_product tool logic. Validates inputs, constructs update data, and makes a PUT request to the FakeStore API.

export async function updateProduct(args: {
  id: number;
  title?: string;
  price?: number;
  description?: string;
  image?: string;
  category?: string;
}): Promise<Product> {
  const { id, title, price, description, image, category } = args;
  validatePositiveInteger(id, 'Product ID');

  const updateData: Record<string, unknown> = {};
  if (title !== undefined) updateData.title = title;
  if (price !== undefined) updateData.price = price;
  if (description !== undefined) updateData.description = description;
  if (image !== undefined) {
    validateUrl(image, 'Image URL');
    updateData.image = image;
  }
  if (category !== undefined) updateData.category = category;

  return put<Product>(`/products/${id}`, updateData);
}

src/tools/products.ts:216-249 (schema)

The tool definition including name, description, and input schema for fakestore_update_product, part of the productTools array used for tool listing.

{
  name: 'fakestore_update_product',
  description: 'Update an existing product (simulation - does not persist)',
  inputSchema: {
    type: 'object',
    properties: {
      id: {
        type: 'number',
        description: 'Product ID to update',
      },
      title: {
        type: 'string',
        description: 'New product title',
      },
      price: {
        type: 'number',
        description: 'New product price',
      },
      description: {
        type: 'string',
        description: 'New product description',
      },
      image: {
        type: 'string',
        description: 'New product image URL',
      },
      category: {
        type: 'string',
        description: 'New product category',
      },
    },
    required: ['id'],
  },
},

src/index.ts:95-107 (registration)

Registration and dispatch logic in the main MCP server handler that maps the tool name to the updateProduct function execution.

if (name === 'fakestore_update_product') {
  const result = await updateProduct(args as {
    id: number;
    title?: string;
    price?: number;
    description?: string;
    image?: string;
    category?: string;
  });
  return {
    content: [{ type: 'text', text: JSON.stringify(result, null, 2) }],
  };
}

src/index.ts:42-42 (registration)
Tool listing handler that includes productTools (containing fakestore_update_product schema) in the list of available tools.
```
tools: [...productTools, ...cartTools, ...userTools],
```

Fake Store API MCP Server