dns

dns is a skill for Claude Code, Codex from LuuOW/meridian-mcp. It costs 30 tokens per session (1,765 once invoked), scanned B, original, MIT.

A guide to managing DNS, the system that maps domain names to servers. It covers DNS records, Cloudflare API automation, timing changes with TTLs, Let's Encrypt DNS challenges, and troubleshooting name resolution.

In plain words
What is it for?
Use it to manage A, AAAA, CNAME, MX, TXT, and other records, plan DNS changes, automate Cloudflare updates, complete DNS-based certificate checks, and debug resolution.
Why use it?
It helps avoid mistakes when changing domain settings, automating DNS updates, issuing wildcard HTTPS certificates, or diagnosing why a domain is not resolving correctly.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to manage A, AAAA, CNAME, MX, TXT, and other records, plan DNS changes, automate Cloudflare updates, complete DNS-based certificate checks, and debug resolution.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/luuow/meridian-mcp/dns
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add LuuOW/meridian-mcp --skill dns
Clone the repo
git clone --depth 1 https://github.com/LuuOW/meridian-mcp

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for dns

README.md
[![agentmods](https://agentmods.dev/badge/skills/luuow/meridian-mcp/dns/github.svg)](https://agentmods.dev/skills/luuow/meridian-mcp/dns)
Your own site
<a href="https://agentmods.dev/skills/luuow/meridian-mcp/dns"><img src="https://agentmods.dev/badge/skills/luuow/meridian-mcp/dns/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for dns

Your own site · 80×15
<a href="https://agentmods.dev/skills/luuow/meridian-mcp/dns"><img src="https://agentmods.dev/badge/skills/luuow/meridian-mcp/dns.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,765 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00030 $0.01765
Opus 5 $0.00015 $0.00882
Sonnet 5 $0.00006 $0.00353
Haiku 4.5 $0.00003 $0.00177

Measured 9d ago against content hash c5aae9cec0c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade B, and why

dns scanned grade B with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

chmod 600 /etc/letsencrypt/cloudflare.ini

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s "https://api.cloudflare.com/client/v4/zones/$CF_ZONE_ID/dns_records" \
skills/dns/SKILL.md · 177 lines

How it starts

The opening of the file, as written. The whole thing — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.

dns

DNS patterns for production domains managed through Cloudflare or direct registrar control. Covers record types, automation via API, debugging resolution chains, and DNS-01 challenges for wildcard TLS certificates.

1) Record Types Reference

Type Purpose Example value
A IPv4 address 203.0.113.10
AAAA IPv6 address 2001:db8::1
CNAME Alias to another hostname myapp.example.com
MX Mail exchange (with priority) 10 mail.example.com
TXT Arbitrary text (SPF, DKIM, ownership) v=spf1 include:sendgrid.net ~all
NS Authoritative nameservers ns1.cloudflare.com
SRV Service location _http._tcp 10 5 80 web.example.com
CAA Certificate authority restriction 0 issue "letsencrypt.org"
PTR Reverse DNS (IP → name) Set at hosting provider

2) TTL Strategy

Production records:   300s  (5min) — fast propagation for active changes
Stable records:      3600s  (1hr)  — normal operating cost
Root / NS records:  86400s  (24hr) — only change during migrations
Pre-migration TTL:    300s         — lower 24h before any DNS change

Lower TTL before a planned migration. Restore after stabilization.

3) Cloudflare API Automation

export CF_TOKEN="your-api-token"    # Zone:DNS:Edit permission
export CF_ZONE_ID="your-zone-id"    # Get from Cloudflare dashboard → zone overview

# List all records
curl -s "https://api.cloudflare.com/client/v4/zones/$CF_ZONE_ID/dns_records" \
  -H "Authorization: Bearer $CF_TOKEN" | jq '.result[] | {name, type, content, ttl}'

# Create an A record
curl -s -X POST "https://api.cloudflare.com/client/v4/zones/$CF_ZONE_ID/dns_records" \
  -H "Authorization: Bearer $CF_TOKEN" \
  -H "Content-Type: application/json" \
  --data '{"type":"A","name":"api","content":"203.0.113.10","ttl":300,"proxied":false}'

# Update a record (get ID first from list)
curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/$CF_ZONE_ID/dns_records/$RECORD_ID" \
  -H "Authorization: Bearer $CF_TOKEN" \
  -H "Content-Type: application/json" \
  --data '{"type":"A","name":"api","content":"203.0.113.20","ttl":300,"proxied":false}'

# Delete a record
curl -s -X DELETE "https://api.cloudflare.com/client/v4/zones/$CF_ZONE_ID/dns_records/$RECORD_ID" \
  -H "Authorization: Bearer $CF_TOKEN"

Read the full file on GitHub · 177 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 177 lines · 30 tokens per session scan B c5aae9cec0c2

Subscribe to this mod's changes

dns is a skill published in the GitHub repository LuuOW/meridian-mcp (0 stars, last pushed yesterday), licensed MIT. It adds 30 tokens to every session and 1,765 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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