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Pcapy Ng MCP server

by daedalus·io.github.daedalus/mcp-pcapy-ng·v0.1.0
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MCP server exposing pcapy-ng packet capture functionality

B82/100grade B
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Safety scan
B82/100

full report

Adoption
New

0 stars17 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Pcapy Ng tools (14, 2 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • compilewrite action

    Creates a BPF (Berkeley Packet Filter) program for packet filtering.

  • createwrite action

    Creates a packet capture handle to look at packets on the network.

  • findalldevs

    Lists all available network interfaces on the system.

  • get_constants

    Get all pcapy constants (DLT types, directions, errors).

  • get_dlt_names

    Get mapping of DLT (Data Link Type) constants to their names.

  • get_pcap_directions

    Get mapping of PCAP direction constants to their names.

  • lookupdev

    Gets the default network device for packet capture.

  • open_live

    Opens a live network interface for packet capture.

  • open_offline

    Opens a pcap file for reading packet captures.

  • pcap_datalink

    Get the data link type from a pcap handle.

  • pcap_getnonblock

    Get the non-blocking status of a pcap handle.

  • pcap_read

    Read packets from a pcap handle.

  • pcap_setfilter

    Attach a compiled BPF filter to a pcap handle.

  • pcap_setnonblock

    Set the non-blocking mode of a pcap handle.

Public scan report

scanner v0.1.9 · 2026-09-27 · same rubric, same numbers if you re-run it

no findings
  • Code scan5 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 159 days ago8/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 82/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Pcapy Ng compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
82/100
higher than 63% of 48,273 servers
Tools
14
the typical server has 7
Tools that change things
14%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
17
more than 5% of 11,915 servers with a package

What its tools let an agent do: 10 read · 3 create · 1 change

Install Pcapy Ng in Claude Code, Cursor or VS Code

claude mcp add mcp-pcapy-ng -- uvx mcp-pcapy-ng
Add to Cursor

What the publisher says

From the Pcapy Ng repository's README, as published. We do not edit it. Read it on GitHub

mcp-pcapy-ng

MCP server exposing pcapy-ng packet capture functionality.

mcp-name: io.github.daedalus/mcp-pcapy-ng

Install

pip install mcp-pcapy-ng

Usage

The MCP server provides tools for network packet capture using pcapy-ng:

from mcp_pcapy_ng import mcp
mcp.run()

Or via command line:

mcp-pcapy-ng

Available Tools

  • findalldevs - List all available network interfaces
  • lookupdev - Get the default network device
  • open_live - Open a live network interface for packet capture
  • open_offline - Open a pcap file for reading
  • create - Create a packet capture handle
  • compile - Create a BPF filter program
  • pcap_read - Read packets from a pcap handle
  • pcap_datalink - Get the data link type
  • pcap_setfilter - Attach a BPF filter
  • pcap_getnonblock - Get non-blocking status
  • pcap_setnonblock - Set non-blocking mode
  • getdltnames - Get DLT constant mappings

Development

git clone https://github.com/daedalus/mcp-pcapy-ng.git
cd mcp-pcapy-ng
pip install -e ".[test]"

# run tests
pytest

# format
ruff format src/ tests/

# lint
ruff check src/ tests/

# type check
mypy src/

Nothing above is checked by us. What we check is on the safety report.

Pcapy Ng: common questions

Is Pcapy Ng MCP server safe?
Mostly: it is graded B (82/100). Read the Pcapy Ng safety report
How do I install Pcapy Ng?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Pcapy Ng need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Pcapy Ng maintained?
The last commit was 195 days ago (2026-04-21). The latest release is v0.1.0.
How does Pcapy Ng compare with other MCP servers?
safety score 82/100 (higher than 63% of 48,273 servers); tools 14 (the typical server has 7); tools that change things 14% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

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