e-blast-newsletter

e-blast-newsletter is a skill for Claude Code from crealwork/ai-marketing-kit. It costs 118 tokens per session (1,354 once invoked), scanned A, original, MIT.

A tool for sending email through Resend, an email delivery service. It covers one-to-one transactional messages, newsletters sent to a subscriber list, contact-list management, and sending-domain setup.

In plain words
What is it for?
Use it to send transactional email or newsletters, manage subscribers, verify a sending domain, create draft broadcasts, and prepare subject-line variations for testing.
Why use it?
It provides a defined process for preparing and sending permission-based email, including unsubscribe links, test messages, and domain verification.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: positional $N argument.

Part of the ai-marketing-kit plugin — 26 skills shipped together

Good fit Use it to send transactional email or newsletters, manage subscribers, verify a sending domain, create draft broadcasts, and prepare subject-line variations for testing.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/crealwork/ai-marketing-kit/e-blast-newsletter
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 crealwork/ai-marketing-kit --skill e-blast-newsletter
Clone the repo
git clone --depth 1 https://github.com/crealwork/ai-marketing-kit

Made for: Claude Code.

Or install ai-marketing-kit, the plugin that ships this one along with the rest of its 26 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.

agentmods badge for e-blast-newsletter

README.md
[![agentmods](https://agentmods.dev/badge/skills/crealwork/ai-marketing-kit/e-blast-newsletter/github.svg)](https://agentmods.dev/skills/crealwork/ai-marketing-kit/e-blast-newsletter)
Your own site
<a href="https://agentmods.dev/skills/crealwork/ai-marketing-kit/e-blast-newsletter"><img src="https://agentmods.dev/badge/skills/crealwork/ai-marketing-kit/e-blast-newsletter/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 e-blast-newsletter

Your own site · 80×15
<a href="https://agentmods.dev/skills/crealwork/ai-marketing-kit/e-blast-newsletter"><img src="https://agentmods.dev/badge/skills/crealwork/ai-marketing-kit/e-blast-newsletter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 118 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,354 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 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 $0.00118 $0.01354
Opus 5 $0.00059 $0.00677
Sonnet 5 $0.00024 $0.00271
Haiku 4.5 $0.00012 $0.00135

Measured 12d ago against content hash 0f594e129ede, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

e-blast-newsletter 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 12d 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.

Makes network callslowCapability

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

6. Windows에서 API 호출은 Python urllib + utf-8 (curl+cp1252 이모지 크래시).
skills/e-blast-newsletter/SKILL.md · 91 lines

How it starts

The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Resend Email

Resend 하나로 트랜잭셔널 메일 + 뉴스레터(브로드캐스트)를 처리한다. Free 티어: $0, 월 3,000통, 일 100통, 도메인 1개 — 소규모 뉴스레터는 무료로 충분하다. (검증: resend.com/pricing, 2026-07-16)

Hard rules

  1. 발송은 유저 게이트 — "작성해줘"는 발송 승인이 아니다. 브로드캐스트는 반드시 초안 상태로 만들어 유저 확인 후 send.
  2. 브로드캐스트에는 {{{RESEND_UNSUBSCRIBE_URL}}} 필수 — 수신거부 링크 없는 마케팅 메일은 스팸법 위반(CAN-SPAM/개인정보보호법).
  3. 본발송 전 셀프 테스트 — 자기 주소로 1통 보내 렌더링/링크/머지태그 확인.
  4. 일 100통 제한(Free) — 100명 넘는 리스트는 일 단위 분할 또는 Pro($20/mo, 5만통) 업그레이드를 유저에게 안내.
  5. 콜드 아웃리치 금지 — Resend는 permission 기반. 콜드메일은 별도 도메인 + 전용 툴로 (b2b-cold-email).
  6. Windows에서 API 호출은 Python urllib + utf-8 (curl+cp1252 이모지 크래시).
  7. 제목은 A/B 전제 — 브로드캐스트마다 제목 후보 3개(다른 축: 숫자/질문/ 직설)를 만들어 유저가 고르고, 리스트가 1,000+ 이면 오디언스를 세그먼트로 나눠 실제 A/B 발송 → 오픈율 승자를 다음 호 기본 축으로. 히어로 이미지가 있으면 image-gen 스킬로 변형 2–3개.

Setup (1회)

  1. resend.com 가입 → API Keys → env RESEND_API_KEY (re_...) 저장.
  2. 도메인 인증: Dashboard → Domains → Add (또는 POST /domains) → 발급된 SPF/DKIM DNS 레코드를 도메인 DNS에 추가 → Verify. from은 인증된 도메인의 주소만 가능 (뉴스레터 <[email protected]>).
  3. Base https://api.resend.com, Authorization: Bearer $RESEND_API_KEY.
  4. VERIFY: GET /domains 에 status "verified".

A. 트랜잭셔널 (1:1)

POST /emails
{ "from": "Acme <[email protected]>", "to": ["[email protected]"],
  "subject": "...", "html": "..." }
  • 대량 개별 발송: POST /emails/batch — 한 번에 최대 100개 객체.
  • reply_to, cc, bcc, attachments 지원.

B. 뉴스레터 (Audience + Broadcast)

# 1) 오디언스 생성 (리스트당 1개)
POST /audiences            { "name": "Newsletter" }

# 2) 구독자 추가
POST /audiences/{id}/contacts
{ "email": "[email protected]", "first_name": "Jane", "unsubscribed": false }

# 3) 브로드캐스트 생성 (초안)
POST /broadcasts
{ "audience_id": "aud_...",
  "from": "News <[email protected]>",
  "name": "2026-07 뉴스레터",
  "subject": "이번 달 소식",
  "html": "Hi {{{contact.first_name|there}}}, ...
           <a href='{{{RESEND_UNSUBSCRIBE_URL}}}'>수신거부</a>" }

# 4) 유저 승인 후 발송 (즉시 또는 예약)
POST /broadcasts/{id}/send            # 즉시
POST /broadcasts/{id}/send  { "scheduled_at": "2026-07-20T09:00:00+09:00" }

Read the full file on GitHub · 91 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. 12d ago First seen · 91 lines · 118 tokens per session scan A 0f594e129ede

Subscribe to this mod's changes

e-blast-newsletter is a skill published in the GitHub repository crealwork/ai-marketing-kit (18 stars, last pushed 1mo ago), licensed MIT. It adds 118 tokens to every session and 1,354 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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