npm Registry API: Discover Packages in Any Tech Niche (No Key Needed)

npm's registry API lets you search 2M+ packages without any authentication.

Search Packages

curl 'https://registry.npmjs.org/-/v1/search?text=web+scraping&size=5'

Returns: package name, description, version, author, keywords, npm score.

Node.js Example

async function searchNpm(query, limit = 10) {

  const url = `https://registry.npmjs.org/-/v1/search?text=${encodeURIComponent(query)}&size=${limit}`;

  const res = await fetch(url);

  const data = await res.json();



  return data.objects.map(obj => ({

    name: obj.package.name,

    description: obj.package.description,

    version: obj.package.version,

    author: obj.package.author?.name || '',

    score: Math.round(obj.score.final * 100) / 100,

    npm: `https://npmjs.com/package/${obj.package.name}`

  }));

}



const packages = await searchNpm('playwright automation');

console.table(packages);

Why npm Data Matters

• 
  Package count = developer ecosystem size for a technology


• 
  Download trends = adoption velocity


• 
  Score = quality signal (maintenance, popularity, quality)


• 
  Keywords = what problems developers solve with this tech

Use Cases

1. 
   Technology scouting — what tools exist for X?


2. 
   Market research — how big is the developer ecosystem?


3. 
   Build vs buy — is there an existing package for your use case?


4. 
   Competitive analysis — what packages do similar tools depend on?

More Free APIs

• All 9 Free Research APIs


• GitHub API


• arXiv API

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