# JSer.info

> Use this tool when you need to access JavaScript ecosystem data, such as curated news and statistics, to stay updated on trends and track changes. It provides a specialized API with endpoints for Server-Sent Events and MCP interactions, making it ideal for developers and teams who want to research library popularity without manual searching. The JSer.info MCP server is particularly useful for automating tasks that require up-to-date JavaScript information, such as tracking ecosystem changes or informing development decisions.

Canonical page: https://skillsregistry.net/skills/jser-info  
JSON: https://api.skillsregistry.net/v1/skills/jser-info

## Description

The JSer.info MCP server provides AI assistants with access to JavaScript ecosystem data through a specialized API. Developed by azu, this implementation leverages the @jser/data-fetcher and @jser/stat libraries to expose JSer.info's curated JavaScript news and statistics. The server is designed to run both as a Node.js application and as a Cloudflare Worker, with endpoints for Server-Sent Events (/sse) and MCP interactions (/mcp). It's particularly valuable for developers and teams who need to stay updated on JavaScript trends, research library popularity, or track ecosystem changes without manually searching through multiple sources.

## Trust

- **Trust score (0–1):** 0.64
- **Verification tier:** scanned
- **Last scanned:** 2026-09-02

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** cloud-infra
- **Updated:** 2026-09-02

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/jser-info)
- **Repository:** <https://github.com/jser/mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "jser-info"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/jser-info` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/jser-info/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt