`size`

Pack: bundlephobia · Connect: https://pipeworx.io/mcp (see Connect below for a single-pack URL)

No MCP client? Call it directly: GET https://gateway.pipeworx.io/v1/tools/size for the schema, then POST the same URL with its arguments for the data.

Bundle size analysis — minified + gzipped, tree-shakeability, dependencies, esm/cjs detection.

Parameters

Name	Type	Required	Description
`package`	string	yes	npm package name (scoped allowed)
`version`	string	no	Specific version (default latest)
`record`	boolean	no	Record the lookup publicly (default true)

Example call

Arguments

{
  "package": "react"
}

curl

curl -X POST https://gateway.pipeworx.io/bundlephobia/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"size","arguments":{"package":"react"}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('size', {
  "package": "react"
});

More examples

{
  "package": "@lodash/es",
  "version": "4.17.21",
  "record": false
}

Response shape

Field	Type	Description
`name`	string	Package name
`version`	string	Package version
`size`	number	Minified size in bytes
`gzip`	number	Gzipped size in bytes
`brotli`	number	Brotli compressed size in bytes
`dependencyCount`	integer	Number of dependencies
`dependencies`	array	List of dependencies
`hasJSNext`	boolean	Has ES module support
`hasJSModule`	boolean	Has CommonJS support
`description`	string	Package description

Full JSON Schema

{
  "type": "object",
  "description": "Bundle size analysis result from Bundlephobia API",
  "properties": {
    "name": {
      "type": "string",
      "description": "Package name"
    },
    "version": {
      "type": "string",
      "description": "Package version"
    },
    "size": {
      "type": "number",
      "description": "Minified size in bytes"
    },
    "gzip": {
      "type": "number",
      "description": "Gzipped size in bytes"
    },
    "brotli": {
      "type": "number",
      "description": "Brotli compressed size in bytes"
    },
    "dependencyCount": {
      "type": "integer",
      "description": "Number of dependencies"
    },
    "dependencies": {
      "type": "array",
      "description": "List of dependencies",
      "items": {
        "type": "object"
      }
    },
    "hasJSNext": {
      "type": "boolean",
      "description": "Has ES module support"
    },
    "hasJSModule": {
      "type": "boolean",
      "description": "Has CommonJS support"
    },
    "description": {
      "type": "string",
      "description": "Package description"
    }
  }
}

Connect

Add this to your MCP client config — every tool in the catalog, including this one — or use one-click install buttons:

{
  "mcpServers": {
    "pipeworx": {
      "url": "https://pipeworx.io/mcp"
    }
  }
}

Connect to just the bundlephobia pack

{
  "mcpServers": {
    "bundlephobia": {
      "url": "https://gateway.pipeworx.io/bundlephobia/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

size