Bundlephobia

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Bundle-size analysis for npm packages — minified + gzipped, tree-shakeability, dependency count. Keyless.

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free tier50 calls/day

Tools

bundlephobia_size

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

No parameters required.

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similarrequired: package

Return npm packages with similar functionality to the given package, each with their minified + gzipped bundle sizes, to aid migration or replacement decisions.

Parameters
NameTypeDescription
packagereqstring—
versionoptstring—
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bundlephobia_history

Fetch minified + gzipped bundle size for each of up to 5 specified versions of an npm package and return them side-by-side for size regression tracking.

No parameters required.

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recent_searches

Return the list of npm packages most recently measured on bundlephobia.com, showing current community interest in bundle-size analysis.

No parameters required.

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Test with curl

The gateway speaks JSON-RPC 2.0 over HTTP POST. You can test any pack directly from the terminal.

List available tools
bash
curl -X POST https://gateway.pipeworx.io/bundlephobia/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
Call a tool
bash
curl -X POST https://gateway.pipeworx.io/bundlephobia/mcp \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"bundlephobia_size","arguments":{}}}'

Use with the SDK

Install @pipeworx/sdk to call tools from any TypeScript/Node project.

TypeScript
import { Pipeworx } from '@pipeworx/sdk';
const px = new Pipeworx();
const result = await px.call("bundlephobia_size", {});
ask_pipeworx
// Or ask in plain English:
const answer = await px.ask("bundle-size analysis for npm packages — minified + gzipped, tree-shakeability, dependency count");