What is cold-email-starter-kit?

A beginner guide to setting up a cold-email campaign, meaning unsolicited email sent to potential customers. It covers domains, inboxes, prospect lists, email writing, optional data enrichment, sending, and review.

Use it to prepare sending infrastructure, build a prospect list, write a multi-step email sequence, launch through Smartlead or Instantly, and review campaign results.

It gives first-time users one documented path through the many setup tasks needed before a campaign can send emails.

cold-email-starter-kit — Skill for Claude Code by AlexisMarasigan

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 AlexisMarasigan/coldoutboundskills --skill cold-email-starter-kit

Clone the repo

git clone --depth 1 https://github.com/AlexisMarasigan/coldoutboundskills

Made for: Claude Code.

Or install coldoutboundskills, the plugin that ships this one along with the rest of its 28 skills.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/alexismarasigan/coldoutboundskills/cold-email-starter-kit/github.svg)](https://agentmods.dev/skills/alexismarasigan/coldoutboundskills/cold-email-starter-kit)

Your own site

<a href="https://agentmods.dev/skills/alexismarasigan/coldoutboundskills/cold-email-starter-kit"><img src="https://agentmods.dev/badge/skills/alexismarasigan/coldoutboundskills/cold-email-starter-kit/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/alexismarasigan/coldoutboundskills/cold-email-starter-kit"><img src="https://agentmods.dev/badge/skills/alexismarasigan/coldoutboundskills/cold-email-starter-kit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 89 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,240 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin 98% copy Near-identical to another mod 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.

Model	Per session	Once invoked
Fable 5.1	$0.00089	$0.03240
Opus 5	$0.00044	$0.01620
Sonnet 5	$0.00018	$0.00648
Haiku 4.5	$0.00009	$0.00324

Measured 11d ago against content hash 9d5e1cd9638c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

cold-email-starter-kit scanned grade A with 1 finding 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 11d ago.

The scan reads SKILL.md. This mod also ships 17 executable files (scripts/_lib.ts, scripts/dynadot-bulk-purchase.ts, scripts/dynadot-generate-domains.ts, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Makes network callslowCapability

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

Open `references/13-troubleshooting.md`. It has an error matrix keyed by symptom → cause → fix, plus diagnostic `dig`/`curl` commands for verifying setup.

Origin

This is a copy

98% identical to cold-email-starter-kit — 6 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/cold-email-starter-kit/SKILL.md · 256 lines

How it starts

The opening of the file, as written. The whole thing — 256 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Cold Email Starter Kit

A complete system for running cold email. Follow it top-to-bottom and you will have purchased domains, created warmed inboxes, built a lead list, written a campaign, and sent your first emails. Designed for beginners — no prior cold email experience required.

What you'll build

By the end of the flow you'll have:

10-20 throwaway sending domains purchased on Dynadot
20-40 warmed sending inboxes on Zapmail
A 2,000-person lead list from Prospeo
A 4-step email sequence with variants and personalization
A live campaign in Smartlead or Instantly sending daily
Analytics and reply handling set up

Total cost month 1: ~$186. Recurring: ~$126/mo. See references/00-getting-started.md for breakdown.

The end-to-end flow

Deliverability basics → understand why we buy domains + inboxes (read once)
Strategy → pick your offer and ICP
Copywriting → write the sequence
Infrastructure → buy domains, create inboxes
List building → pull prospects from Prospeo
Enrichment (optional) → add personalization data
Launch → upload to Smartlead or Instantly
Analyze + iterate → pull metrics back, tweak

Before you start: prerequisites

Technical:

Node.js 20+ (node --version should print v20 or higher) → install from nodejs.org
tsx (npm install -g tsx)
Terminal comfort (you know what cd and cp do)
A text editor (VS Code recommended)

Accounts (sign up before continuing):

Dynadot (domain registrar)
Zapmail (inbox provider)
Prospeo (lead source)
Smartlead OR Instantly (sending platform — pick one)

Budget: ~$200 for your first campaign.

If any of the above is missing, start at references/00-getting-started.md. It has exact signup links and API-key retrieval instructions.

Recommended entry point: /cold-email-kickoff

Before reading this tutorial, invoke /cold-email-kickoff from Claude Code. It's a shorter, guided flow that orchestrates ICP onboarding + lead magnet + campaign strategy + a consolidated campaign plan — and hands you to the right next skill based on whether you have infrastructure already. Most users should start there.

Read the full file on GitHub · 256 lines

Files

What ships with it

33 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

11d ago First seen · 256 lines · 89 tokens per session scan A 9d5e1cd9638c

Subscribe to this mod's changes

cold-email-starter-kit is a skill published in the GitHub repository AlexisMarasigan/coldoutboundskills (4 stars, last pushed 4mo ago), licensed MIT. It adds 89 tokens to every session and 3,240 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 98% identical to cold-email-starter-kit, differing in 6 lines, and is treated as a copy.

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