A reference guide for composing rich HTML emails with MJML, a system that turns email layout components into responsive email markup.

Use it to define and compose emails with the Google Workspace MCP server, including layout, content parameters, and Jinja-based filters.

It helps you assemble supported email blocks and nesting arrangements without learning every component rule from scratch.

mjml-email — Skill for Claude Code by dipseth

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 dipseth/google_workspace_fastmcp2 --skill mjml-email

Clone the repo

git clone --depth 1 https://github.com/dipseth/google_workspace_fastmcp2

Made for: Claude Code.

Or install google-workspace-unlimited, the plugin that ships this one along with the rest of its 3 skills, 1 MCP server.

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/dipseth/google_workspace_fastmcp2/mjml-email/github.svg)](https://agentmods.dev/skills/dipseth/google_workspace_fastmcp2/mjml-email)

Your own site

<a href="https://agentmods.dev/skills/dipseth/google_workspace_fastmcp2/mjml-email"><img src="https://agentmods.dev/badge/skills/dipseth/google_workspace_fastmcp2/mjml-email/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/dipseth/google_workspace_fastmcp2/mjml-email"><img src="https://agentmods.dev/badge/skills/dipseth/google_workspace_fastmcp2/mjml-email.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 155 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.

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	$0.00031	$0.00155
Opus 5.5	$0.00012	$0.00062
Sonnet 5.5	$0.00006	$0.00031
Haiku 4.5	$0.00003	$0.00015

Measured 2mo ago against content hash 4fe0695c3783, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mjml-email 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 2mo 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.

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.

plugins/google-workspace-unlimited/skills/mjml-email/SKILL.md · 20 lines

What it actually says

MJML Email Composer

Quick Start

This skill provides documentation for the gmail.mjml_types module.

Available Resources

symbols.md - Complete symbol reference table
containment-rules.md - What components can contain what
email-dsl-syntax.md - Custom guide: email-dsl-syntax
email-params.md - Custom guide: email-params
jinja-filters.md - Custom guide: jinja-filters
components/ - Per-component documentation (28 components)

Files

What ships with it

34 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.

2mo ago Changed 4fe0695c3783
2mo ago First seen · 20 lines · 31 tokens per session scan A 834e58377aba

Subscribe to this mod's changes

mjml-email is a skill published in the GitHub repository dipseth/google_workspace_fastmcp2 (31 stars, last pushed 10d ago), licensed Apache-2.0. It adds 31 tokens to every session and 155 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.

Writing and docs

mjml-email next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mjml-emaildipseth/google_workspace_fastmcp2	Skill	31	10d ago	Apache-2.0	A	31	Claude Code
imagegenopenai/codex	Skill	134k	today	Apache-2.0	A	113	Codex
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	2d ago	MIT	A	200	Claude Code, Codex
playwright-climicrosoft/playwright	Skill	100k	today	Apache-2.0	A	19	Claude Code
browser-automationopenclaw/openclaw	Skill	394k	today	MIT	A	36	Claude Code
systematic-debuggingobra/superpowers	Skill	315k	6d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	today	MIT	A	95	Claude Code