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har2sdk

MCP server · npm · graded 2026-10-30Source linked

We found no security report about this add-on in the sources we read (checked 2026-10-31). That does not prove it is harmless.

Turn browser network traffic (HAR) into a typed TypeScript SDK, an OpenAPI 3.1 spec and a mock server. Local, deterministic, no API key. Ships an MCP server so Claude can name and document every endpoint.

No outside reports on file

har2sdk fetches arbitrary web URLs and requires API keys or tokens; restrict its folder reach, network access, and credentials before installing.

Based on public adoption and transparency signals as of Oct 30, 2026. Our opinion, not a code audit or security guarantee.

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What it can access

  • Local filesNo local folder access notedLOW
  • Command executionNo shell command runner notedLOW
  • Network reachFetches arbitrary web URLsREVIEW
  • CredentialsRequires API key or tokenREVIEW
  • Package sourcenpm (har2sdk)PUBLIC

Inferred from this listing’s public package details and description. Check the project’s source before installing.

Install

npx -y har2sdk

All setup options ↓

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Everything known

We found nothing about this project in the sources we read (last checked 2026-10-31). That does not mean it has no problems.

0 incidents · 0 advisories · 0 news articles · 0 community threads · checked 2026-10-31

Popularity grade: C (from public signals such as stars and downloads, not a code review). Graded 2026-10-30.

Sources we read: OSV, GitHub Advisory Database, CISA Known Exploited Vulnerabilities, 44 security news feeds and our incident library. Last checked 2026-10-31.

Check a specific version →

About har2sdk

har2sdk is an MCP server focused on Web & browsing and Files & documents: Turn browser network traffic (HAR) into a typed TypeScript SDK, an OpenAPI 3.1 spec and a mock server. Local, deterministic, no API key. Ships an MCP server so Claude can name and document every endpoint.

It is published on npm as har2sdk and hosted on GitHub at mersbyte/har2sdk (1,078 weekly npm downloads). Based on its public metadata, its operational scope includes: fetches arbitrary web urls, requires api key or token.

Setup

These use the package this listing points to. Check the project’s own instructions before running anything.

npm command

npx -y har2sdk

MCP client config

For Claude Desktop (claude_desktop_config.json) or Cursor (.cursor/mcp.json).

json
{
  "mcpServers": {
    "har2sdk": {
      "command": "npx",
      "args": [
        "-y",
        "har2sdk"
      ]
    }
  }
}

Why this grade

CC — Moderate risk signals

Signal-based grade (2/7 points): public source code. This reflects adoption and transparency, not a code review.

Popularity and upkeep

23/100
Weekly npm downloads
1.1k
Listing last refreshed
2026-10-30

These are public popularity signals, not a maintenance check. Look at the repository’s commit history and open issues.

Risks to watch for

  • Untrusted web content & prompt injection: Fetches arbitrary web pages or remote endpoints where hidden instructions could manipulate agent behavior. Restrict outbound domains and review tool outputs.
  • Credential & token exposure: Requires API keys or secrets in configuration. Store credentials in environment variables with read-only or minimum required scopes and rotate them regularly.
  • Dependency & version pinning: Distributed via npm (har2sdk). Pin an exact release version or commit SHA rather than floating tags so upstream updates are reviewed first.

How to lower the risk

Least-privilege permissions

  • Give it access only to the specific folders, accounts or projects it needs, never your whole drive or admin account.
  • Use a separate, limited API key or login just for this tool so you can switch it off without affecting anything else.

Network isolation

  • Run it on a work computer or sandbox account, not one holding personal or company-sensitive data.
  • If your IT team can, limit which websites and services it is allowed to contact.

Monitoring

  • Check its activity history or logs weekly at first, and look at what it changed or sent.
  • Turn on alerts for new logins or unusual usage on any account it connects to.

Red flags to watch for

  • It asks for more access than its job requires, or prompts you to paste passwords.
  • It suddenly updates with new owners, or starts contacting unfamiliar websites.

Questions

How do I install har2sdk?

Run npx -y har2sdk in your terminal, or add the server entry to your claude_desktop_config.json or .cursor/mcp.json as shown in the Setup section on this page. Full setup docs and environment variables are in github.com/mersbyte/har2sdk.

Are there security reports about har2sdk?

We found no security report about this add-on in the sources we read (checked 2026-10-31). har2sdk currently holds Grade C (Moderate risk signals) based on public adoption and transparency signals. Review the permissions and source repository before granting access to local files, shell commands, or API keys.

Is har2sdk actively maintained?

har2sdk has 1.1k weekly npm downloads. Our directory data was last refreshed on 2026-10-30. Check recent commit activity, release tags, and open issues at github.com/mersbyte/har2sdk before pinning it in production.

What are alternatives to har2sdk?

You can compare har2sdk side by side with other Browser MCP servers in the Related tools section on this page, or use the Compare tool on AgentArmorHQ.

README badge and team notes

Maintain or use har2sdk? Show its live grade in your GitHub README, docs site, or run a check from the terminal before you install.

AgentArmorHQ Risk Grade C for har2sdk

GitHub README Markdown:

markdown
[![AgentArmorHQ Risk Grade for har2sdk](https://agentarmorhq.com/api/badge/mersbyte-har2sdk)](https://agentarmorhq.com/skills/mersbyte-har2sdk)

HTML embed:

html
<a href="https://agentarmorhq.com/skills/mersbyte-har2sdk"><img src="https://agentarmorhq.com/api/badge/mersbyte-har2sdk" alt="AgentArmorHQ Risk Grade for har2sdk" height="20" /></a>

Terminal check:

terminal
curl -fsSL https://agentarmorhq.com/api/cli | node --input-type=module - check "mersbyte-har2sdk"

Share with your security lead

Need sign-off to use har2sdk? Copy this note for Slack, a ticket or a pull request.

### AgentArmorHQ Security Review Memo: har2sdk
- **Listing URL:** https://agentarmorhq.com/skills/mersbyte-har2sdk
- **Type:** App connector
- **Risk Grade:** Grade C (Moderate risk signals)
- **Outside Security Advisories on File:** 0

#### Permission & Blast-Radius Signals
- **Local files:** No local folder access noted
- **Command execution:** No shell command runner noted
- **Network reach:** Fetches arbitrary web URLs
- **Credentials:** Requires API key or token
- **Package source:** npm (har2sdk)

#### Recommended Hardened Setup
- **Command:** `npx -y --ignore-scripts har2sdk`
- **Controls:** Pin an exact version in `.mcp.json`, scope access to a single workspace folder, and use a least-privilege read-only token where supported.

_Based on public adoption and transparency signals as of Oct 30, 2026. Our opinion, not a code audit or security guarantee._

Key facts

Type
App connector
Publisher
mersbyte
Source code
github.com/mersbyte/har2sdk
Install command
npm install har2sdk
Est. context load
~900 tokens / turn (~5 tool schemas, 0.45% of 200k context)
Popularity
1.1k weekly npm downloads
Last updated
2026-10-30
Last graded
2026-10-30

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