An email-sending tool for the Resend service, which delivers transactional messages such as receipts and alerts. It accepts plain text or HTML, multiple recipients, and file attachments.

Use it to send application notifications, HTML emails, or emails with attachments from a Python script or piped command output.

It removes the need to write the Resend API request yourself. It also makes the message details clear for approval before an irreversible send.

resend — Skill for Claude Code and Codex by tdimino

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 tdimino/claude-code-minoan --skill resend

Clone the repo

git clone --depth 1 https://github.com/tdimino/claude-code-minoan

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/tdimino/claude-code-minoan/resend/github.svg)](https://agentmods.dev/skills/tdimino/claude-code-minoan/resend)

Your own site

<a href="https://agentmods.dev/skills/tdimino/claude-code-minoan/resend"><img src="https://agentmods.dev/badge/skills/tdimino/claude-code-minoan/resend/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/tdimino/claude-code-minoan/resend"><img src="https://agentmods.dev/badge/skills/tdimino/claude-code-minoan/resend.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 68 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,448 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 3 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

high Privilege Escalation · line 24
Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
high Privilege Escalation · line 28
Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
high Privilege Escalation · line 141
Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00068	$0.01448
Opus 5	$0.00034	$0.00724
Sonnet 5	$0.00014	$0.00290
Haiku 4.5	$0.00007	$0.00145

Measured 8d ago against content hash a64795c2c61d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

resend scanned grade A with 0 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 8d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/_resend_utils.py, scripts/send.py), 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/integration-automation/resend/SKILL.md · 146 lines

How it starts

The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Resend Email Skill

Send emails via the Resend transactional email API.

IMPORTANT: Confirm Before Sending

Always confirm with the user before sending an email. Show them the recipient(s), subject, and body content and get explicit approval. Email is not reversible.

When to Use This Skill

Sending a transactional or notification email
Sending HTML email (inline or from a file)
Sending email with attachments
Piping content from another command into an email body

Prerequisites

API Key: Get a Resend API key at https://resend.com/api-keys (format: re_xxxxxxxxx)
Add to secrets: Add export RESEND_API_KEY=re_xxxxxxxxx to ~/.config/env/secrets.env
Verify domain (optional): By default, send from [email protected] (test only). For production, verify a domain at https://resend.com/domains
Install requests: uv pip install --system requests

Credentials checked in order: RESEND_API_KEY env var > ~/.config/env/secrets.env > ~/.claude.json

Quick Start

# Simple text email
python3 ~/.claude/skills/resend/scripts/send.py \
  --to "[email protected]" \
  --subject "Hello from Claude" \
  --body "This is a test email."

# HTML email from a file
python3 ~/.claude/skills/resend/scripts/send.py \
  --to "[email protected]" \
  --subject "Weekly Report" \
  --html report.html

# Pipe content as body
echo "Pipeline output here" | python3 ~/.claude/skills/resend/scripts/send.py \
  --to "[email protected]" \
  --subject "Build Results"

# Multiple recipients with CC
python3 ~/.claude/skills/resend/scripts/send.py \
  --to "[email protected]" "[email protected]" \
  --cc "[email protected]" \
  --subject "Meeting Notes" \
  --body "Attached are the notes from today."

# With attachments
python3 ~/.claude/skills/resend/scripts/send.py \
  --to "[email protected]" \
  --subject "Invoice" \
  --body "Please find the invoice attached." \
  --attachments invoice.pdf

# Custom from address (requires verified domain)
python3 ~/.claude/skills/resend/scripts/send.py \
  --from "[email protected]" \
  --to "[email protected]" \
  --subject "Test" \
  --body "Sent from a verified domain."

# Inline HTML string
python3 ~/.claude/skills/resend/scripts/send.py \
  --to "[email protected]" \
  --subject "Styled Email" \
  --html "<h1>Hello</h1><p>This is <strong>bold</strong>.</p>"

# Dry run (print payload without sending)
python3 ~/.claude/skills/resend/scripts/send.py \
  --to "[email protected]" \
  --subject "Test" \
  --body "Hello" \
  --dry-run

Read the full file on GitHub · 146 lines

Files

What ships with it

3 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.

8d ago First seen · 146 lines · 68 tokens per session scan A a64795c2c61d

Subscribe to this mod's changes

resend is a skill published in the GitHub repository tdimino/claude-code-minoan (41 stars, last pushed yesterday), licensed MIT. It adds 68 tokens to every session and 1,448 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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