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mcp-nettools

MCP server for network diagnostics and service health checks. Exposes 235 tools — from low-level network probes (ping, traceroute, port_check, cert_check) to one-shot reachability/health checks for ~180 popular self-hosted services and infrastructure components (databases, message queues, observability stacks, the *arr media stack, and more).

Works with Claude Code, Claude Desktop, or any MCP client. Communicates over stdio.

Every tool is a hand-written probe that speaks the real protocol or hits the real health endpoint — there are no auto-generated or duplicate tools. The breadth is the point: ask Claude "is my Postgres up?", "what TLS versions does example.com accept?", or "scan the common ports on 192.0.2.10" and it just works.

Quick Start

uvx (no install required)

uvx mcp-nettools

Claude Code

claude mcp add nettools -- uvx mcp-nettools

Claude Desktop / MCP clients

Add to your MCP config (~/.config/claude/claude_desktop_config.json for Claude Desktop, or any client's mcp.json):

{
  "mcpServers": {
    "nettools": {
      "command": "uvx",
      "args": ["mcp-nettools"]
    }
  }
}

Docker

docker run -i --rm ghcr.io/aaronckj/mcp-nettools:latest

Or in your MCP config:

{
  "mcpServers": {
    "nettools": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "ghcr.io/aaronckj/mcp-nettools:latest"]
    }
  }
}

Related MCP server: Ping MCP Server

Requirements

For the ping and traceroute tools, the server needs system binaries:

  • Linux: apt install iputils-ping traceroute

  • macOS: both are pre-installed

  • Docker: included in the image

All other tools are pure-Python and need no extra binaries.

Tools

235 tools, grouped by category below.

Core network diagnostics (13)

Tool

Description

ping

Ping a host and return reachability, packet loss %, and RTT stats

port_check

Check if a TCP port is open on a host

port_scan

Check multiple TCP ports on a host

traceroute

Trace the network path to a host

get_public_ip

Return the public IP of the machine running this server, plus basic geolocation

arp_table

Show ARP/neighbor table entries (IP-to-MAC mappings) as structured records

wake_on_lan

Send a Wake-on-LAN magic packet to a MAC address

speedtest

Run a network speed test using the nearest server

tcp_banner

Connect to any TCP port and read the initial server banner

scan_common_ports

Scan 17 commonly used ports and report which are open

ping_sweep

Ping all hosts in an IPv4 CIDR range and report which respond

local_ports

List listening TCP and UDP ports on the local machine

network_interfaces

List local network interfaces with IPs, prefix length, and link status

DNS, IP & address intelligence (14)

Tool

Description

dns_lookup

Look up DNS records for a hostname

reverse_dns

Reverse DNS lookup for an IP address

reverse_dns_bulk

Reverse DNS lookup for multiple IP addresses at once

subnet_info

Parse an IPv4/IPv6 CIDR: network address, host range, host count

geolocation

Geolocation for a public IP: country, region, city, ISP, coordinates

whois

Look up WHOIS registration data for a domain or IP address

mac_lookup

Look up the vendor/manufacturer for a MAC address (OUI database)

dns_bulk_lookup

Look up DNS records for multiple hostnames in one call

dns_propagation

Check DNS propagation across 4 major public resolvers

bgp_lookup

Look up BGP/ASN information for a public IP via Team Cymru

dnssec_check

Check DNSSEC status: DNSKEY records, RRSIG signatures

check_spf

Check the SPF record for a domain

check_dkim

Check whether a DKIM public key is published for a domain and selector

check_dmarc

Check the DMARC policy for a domain

TLS & certificates (3)

Tool

Description

cert_check

SSL certificate expiry, issued date, issuer, SANs, days remaining

tls_version_check

Test which TLS protocol versions a server accepts (TLS 1.2, TLS 1.3)

cert_check_bulk

Check TLS certificates for multiple hosts in one call

HTTP & web (10)

Tool

Description

http_check

Check an HTTP/HTTPS URL: status, response time, content type, server header

http_redirect_chain

Follow an HTTP/HTTPS URL through all redirects and return every hop

check_security_headers

Report which HTTP security headers are present or missing

http_security_headers

Audit HTTP security headers on a web server

http_post

Send an HTTP POST request with a body

http_put

Send an HTTP PUT request with a body

http_delete

Send an HTTP DELETE request

http_patch

Send an HTTP PATCH request with a body

check_wordpress

Check WordPress site health via GET /wp-json/

check_ghost

Check Ghost blog platform health

Mail, remote-access & network protocols (14)

Tool

Description

smtp_check

SMTP connectivity, banner, capabilities, STARTTLS support

imap_check

Check IMAP server connectivity

pop3_check

Check POP3 server connectivity

ssh_check

SSH connectivity and server banner (version string)

check_rdp

Check whether a Remote Desktop Protocol server is reachable

check_vnc

Connect to a VNC server and read the RFB protocol banner

check_ldap

Check LDAP server connectivity and protocol

check_smb

Check SMB/CIFS file-sharing service reachability

check_nfs

Check NFS file server availability

ftp_check

Connect to an FTP server and read its banner

ntp_check

NTP reachability and clock offset relative to local time

snmp_check

SNMPv2c GetRequest for sysDescr over UDP

check_sip

Check a SIP server via an OPTIONS probe

check_mqtt

Connect to an MQTT broker and send a CONNECT packet (v3.1.1)

Databases (16)

Tool

Description

mysql_check

MySQL/MariaDB server greeting and version

check_postgres

PostgreSQL server version from the startup response

check_mongodb

MongoDB hello command via the wire protocol

check_redis

Redis PING/PONG check

check_memcached

Memcached version check

check_cassandra

Apache Cassandra via the CQL binary protocol

check_clickhouse

ClickHouse OLAP database via HTTP /ping

check_neo4j

Neo4j graph database via the HTTP API

check_couchdb

Apache CouchDB version and node name

check_influxdb

InfluxDB server health

check_elasticsearch

Elasticsearch/OpenSearch cluster health

check_opensearch

OpenSearch cluster health via /_cluster/health

check_etcd

etcd v3 cluster health

check_victoriametrics

VictoriaMetrics time-series DB health

check_nocodb

NocoDB no-code database platform health

check_pocketbase

PocketBase backend health

Message queues & streaming (3)

Tool

Description

check_kafka

Apache Kafka broker availability

check_rabbitmq

RabbitMQ health via the management plugin API

check_zookeeper

ZooKeeper health via the ruok command

Containers, orchestration & identity (15)

Tool

Description

check_docker_api

Docker daemon REST API via GET /_ping

check_kubernetes_api

Kubernetes API server health via /healthz and /version

check_consul

Consul agent health and cluster leader

check_vault

HashiCorp Vault server health

check_traefik

Traefik reverse proxy health

check_minio

MinIO object storage liveness/readiness

check_portainer

Portainer container management UI health

check_cockpit

Cockpit Linux server management web UI health

check_headscale

Headscale (self-hosted Tailscale control server) health

check_netbird

NetBird VPN management server health

check_authentik

Authentik identity provider health

check_authelia

Authelia authentication server health

check_keycloak

Keycloak identity server health

check_vaultwarden

Vaultwarden (Bitwarden-compatible) password manager health

check_bitwarden

Bitwarden (Unified) server health

Observability, monitoring & network security (33)

Tool

Description

check_prometheus

Prometheus monitoring service health

check_grafana

Grafana observability platform health

check_loki

Grafana Loki log aggregation health

check_alertmanager

Prometheus Alertmanager health

check_tempo

Grafana Tempo distributed tracing health

check_jaeger

Jaeger distributed tracing UI and query API

check_zipkin

Zipkin distributed tracing health and service count

check_mimir

Grafana Mimir (scalable Prometheus) readiness

check_vector

Vector log pipeline health

check_signoz

SigNoz (OpenTelemetry observability) health

check_kibana

Kibana (Elastic Stack UI) status

check_uptime_kuma

Uptime Kuma monitoring health

check_gatus

Gatus health monitoring dashboard

check_healthchecks

Healthchecks.io (self-hosted) cron monitoring

check_netdata

Netdata real-time performance monitoring

check_glances

Glances system monitoring server health

check_beszel

Beszel server monitoring hub

check_dashdot

Dashdot server stats dashboard

check_dozzle

Dozzle Docker log viewer health

check_scrutiny

Scrutiny disk health monitoring

check_changedetection

changedetection.io web change monitoring

check_speedtest_tracker

Speedtest Tracker health

check_librenms

LibreNMS network monitoring

check_ntopng

ntopng network traffic monitoring

check_checkmk

Checkmk IT monitoring

check_icinga

Icinga monitoring

check_zabbix

Zabbix enterprise monitoring

check_pihole

Pi-hole DNS ad blocker status

check_adguard

AdGuard Home DNS filter health

check_technitium

Technitium DNS Server reachability

check_crowdsec

CrowdSec security agent local API

check_wazuh

Wazuh security platform API

check_frigate

Frigate NVR (network video recorder) health

Git, CI/CD & developer tools (15)

Tool

Description

check_gitea

Gitea/Forgejo git server health

check_forgejo

Forgejo (Gitea fork) git server health

check_gitlab

GitLab instance health

check_gitness

Gitness (Harness git hosting) health

check_code_server

code-server (VSCode in browser) health

check_filebrowser

File Browser web-based file manager health

check_n8n

n8n workflow automation platform health

check_windmill

Windmill workflow automation platform health

check_directus

Directus headless CMS health

check_strapi

Strapi headless CMS reachability

check_appwrite

Appwrite open-source BaaS health

check_hoppscotch

Hoppscotch self-hosted API testing backend health

check_stirling_pdf

Stirling-PDF tools server health

check_flaresolverr

FlareSolverr Cloudflare bypass proxy health

check_it_tools

IT Tools developer utility hub reachability

Media servers & *arr stack (31)

Tool

Description

check_plex

Plex Media Server reachability

check_jellyfin

Jellyfin media server health

check_emby

Emby Media Server reachability

check_navidrome

Navidrome music streaming server health

check_audiobookshelf

Audiobookshelf audiobook and podcast server health

check_kavita

Kavita manga/comic/book reader server health

check_komga

Komga comics/manga server health

check_calibre_web

Calibre-Web ebook library server health

check_immich

Immich photo management server health

check_photoprism

PhotoPrism photo management server health

check_tubearchivist

TubeArchivist (YouTube archiver) health

check_sonarr

Sonarr TV series manager reachability

check_radarr

Radarr movie manager reachability

check_lidarr

Lidarr music collection manager health

check_readarr

Readarr book/eBook collection manager health

check_bazarr

Bazarr subtitle management server health

check_prowlarr

Prowlarr indexer manager health

check_jackett

Jackett indexer proxy reachability

check_overseerr

Overseerr media request manager reachability

check_jellyseerr

Jellyseerr media request/discovery manager health

check_tautulli

Tautulli Plex statistics reachability

check_qbittorrent

qBittorrent Web UI health

check_transmission

Transmission BitTorrent client RPC health

check_sabnzbd

SABnzbd usenet downloader health

check_nzbget

NZBGet usenet downloader health

check_mylar3

Mylar3 comics manager health

check_searxng

SearXNG meta-search engine availability

check_whoogle

Whoogle search engine reachability

check_invidious

Invidious YouTube frontend reachability

check_nitter

Nitter Twitter/X frontend reachability

check_redlib

Redlib (private Reddit frontend) reachability

Self-hosted apps & productivity (67)

Tool

Description

check_nextcloud

Nextcloud/ownCloud instance health

check_seafile

Seafile file sync and share server health

check_syncthing

Syncthing file sync service health

check_homeassistant

Home Assistant health

check_paperless

Paperless-NGX document management health

check_outline

Outline wiki/knowledge base health

check_bookstack

BookStack wiki platform health

check_wikijs

Wiki.js health

check_dokuwiki

DokuWiki health

check_docmost

Docmost collaborative wiki/documentation health

check_hedgedoc

HedgeDoc collaborative markdown notes health

check_trilium

Trilium Notes hierarchical note-taking reachability

check_memos

Memos lightweight notes server health

check_joplin_server

Joplin Server note-syncing backend health

check_onlyoffice

OnlyOffice Document Server health

check_collabora

Collabora Online Office server health

check_grist

Grist spreadsheet/database service health

check_miniflux

Miniflux RSS reader health

check_freshrss

FreshRSS feed aggregator availability

check_mealie

Mealie recipe manager health

check_tandoor

Tandoor recipe manager health

check_grocy

Grocy grocery and household management health

check_monica

Monica personal CRM availability

check_vikunja

Vikunja task manager health

check_planka

Planka kanban board health

check_kimai

Kimai time-tracking application health

check_snipe_it

Snipe-IT IT asset management health

check_openproject

OpenProject project management reachability

check_leantime

Leantime project management reachability

check_organizr

Organizr v2 dashboard reachability

check_heimdall

Heimdall application dashboard reachability

check_homarr

Homarr dashboard health

check_homepage

Homepage dashboard (gethomepage.dev) health

check_flame

Flame startpage/dashboard reachability

check_kasm

Kasm Workspaces containerized desktop reachability

check_guacamole

Apache Guacamole remote desktop gateway

check_actual_budget

Actual Budget personal finance health

check_firefly_iii

Firefly III personal finance manager health

check_maybe

Maybe personal finance manager reachability

check_invoiceninja

Invoice Ninja health

check_wallos

Wallos subscription tracker reachability

check_linkwarden

Linkwarden bookmark manager availability

check_linkding

Linkding bookmark manager health

check_shiori

Shiori bookmark manager reachability

check_hoarder

Hoarder bookmarks manager reachability

check_karakeep

Karakeep (formerly Hoarder) AI bookmark manager health

check_wallabag

Wallabag read-it-later service availability

check_archivebox

ArchiveBox web archiving service reachability

check_baikal

Baïkal CalDAV/CardDAV server reachability

check_radicale

Radicale CalDAV/CardDAV server reachability

check_mattermost

Mattermost team messaging server health

check_matrix_synapse

Matrix Synapse homeserver health

check_discourse

Discourse forum health

check_ntfy

ntfy push notification server health

check_gotify

Gotify push notification server health

check_listmonk

listmonk newsletter/mailing list manager health

check_plausible

Plausible Analytics health

check_umami

Umami privacy-focused analytics health

check_matomo

Matomo web analytics health

check_limesurvey

LimeSurvey survey platform health

check_rallly

Rallly scheduling/polls application health

check_penpot

Penpot open-source design tool health

check_zipline

Zipline file sharing server health

check_docuseal

DocuSeal document signing service reachability

check_ollama

Ollama LLM server health

check_open_webui

Open WebUI (Ollama/LLM frontend) health

check_anythingllm

AnythingLLM (self-hosted RAG/AI workspace) health

Server utilities (1)

Tool

Description

health_check

Liveness check returning {"status": "healthy", "service": "nettools"}

License

MIT

Install Server
A
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B
quality
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maintenance

Maintenance

Maintainers
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Releases (12mo)
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