agentmods.dev

mcp-page-authoring

mcp-page-authoring is a skill for Claude Code from unbounce/agent-plugins. It costs 151 tokens per session (6,976 once invoked), scanned B, original, MIT.

Guidance for writing custom HTML, CSS, and JavaScript for Unbounce landing pages and page variants. Unbounce is a service for building pages designed to collect leads or drive a specific action.

In plain words
What is it for?
Creating, personalizing, or replacing the code for an Unbounce landing page or variant, including its layout, text, styles, and behavior.
Why use it?
It removes uncertainty about how to structure and update pages created through Unbounce's MCP connection. It also clarifies that these pages cannot be edited in Unbounce's visual builder.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the unbounce-mcp plugin — 4 skills, 1 MCP server shipped together

not rated 2repo changed 3d ago B scan 151 tokens original MIT

Good fit Creating, personalizing, or replacing the code for an Unbounce landing page or variant, including its layout, text, styles, and behavior.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/unbounce/agent-plugins/mcp-page-authoring
View source ↗ unbounce/agent-plugins unbounce.github.io
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 unbounce/agent-plugins --skill mcp-page-authoring
Clone the repo
git clone --depth 1 https://github.com/unbounce/agent-plugins

Made for: Claude Code.

Or install unbounce-mcp, the plugin that ships this one along with the rest of its 4 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.

agentmods badge for mcp-page-authoring

README.md
[![agentmods](https://agentmods.dev/badge/skills/unbounce/agent-plugins/mcp-page-authoring/github.svg)](https://agentmods.dev/skills/unbounce/agent-plugins/mcp-page-authoring)
Your own site
<a href="https://agentmods.dev/skills/unbounce/agent-plugins/mcp-page-authoring"><img src="https://agentmods.dev/badge/skills/unbounce/agent-plugins/mcp-page-authoring/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 mcp-page-authoring

Your own site · 80×15
<a href="https://agentmods.dev/skills/unbounce/agent-plugins/mcp-page-authoring"><img src="https://agentmods.dev/badge/skills/unbounce/agent-plugins/mcp-page-authoring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 151 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,976 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 $0.00151 $0.06976
Opus 5.5 $0.00060 $0.02790
Sonnet 5.5 $0.00030 $0.01395
Haiku 4.5 $0.00015 $0.00698

Measured 3d ago against content hash 9b6ce0854182, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

mcp-page-authoring 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 3d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/ga-click-tracking.js), 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.

Subtle steeringmediumPrompt injection

Instructions that bias recommendations or shape behaviour without the user noticing.

- An MCP-authored page **cannot be edited in the Unbounce builder**. Never tell the user they can open, tweak, swap images, or finish the page "in the

Makes network callslowCapability

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

`upload` and `download` hand you `curl` commands to run locally. If your client
plugins/unbounce-mcp/skills/mcp-page-authoring/SKILL.md · 472 lines

How it starts

The opening of the file, as written. The whole thing — 472 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Authoring an Unbounce MCP page

These rules apply when you write the HTML/CSS/JS body for create_page_from_html, create_variant_from_html, or update_variant_from_html. The page is a full-bleed custom-HTML page — you own the markup end to end. Design the page to be optimized for conversions: by default, every layout, copy, and hierarchy decision should serve the page's single conversion goal.

This covers MCP-authored pages only, and the split is exclusive both ways:

  • A page hand-built in the Unbounce builder is not editable this way — update_variant_from_html refuses it. Replicating or modernizing a builder-built page is a different, audit-first job.
  • An MCP-authored page cannot be edited in the Unbounce builder. Never tell the user they can open, tweak, swap images, or finish the page "in the Unbounce builder/editor" — they cannot. Every edit goes through these MCP tools: the user asks for the change, or supplies updated HTML.

AI Builder pages (create_ai_builder_page, edit_ai_builder_page) are a separate route covered by the mcp-ai-builder-authoring skill; they stay editable in the Unbounce AI builder, so the rule above does not apply to them.

A new Classic page needs the Classic Builder on the account's plan: check builders.classic for the client's account in list_accounts_and_clients. When it is false, take the AI Builder route instead and tell the user why; create_page_from_html refuses such an account before anything is uploaded, with create-page-from-html.classic-builder-not-entitled, or create-page-from-html.no-builder-entitled when the plan has neither builder. A create-page-from-html.not-author-or-not-entitled at the create means the user is not an author on the client or the plan lacks the Classic Builder; builders tells them apart.

Updating a variant: HTML/CSS replace, JS is left alone

update_variant_from_html full-replaces the body HTML and the stylesheet, so send every stylesheet the variant should keep on every call. JavaScript is the exception: omit scripts and the variant's existing custom-JavaScript elements are kept, reported back as scripts_preserved.

Read the full file on GitHub · 472 lines

Files

What ships with it

2 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.

  1. 3d ago Changed · +18 lines 9b6ce0854182
  2. 17d ago Changed · +1 lines 4381387028a8
  3. 19d ago Changed · +10 lines 3a775f7658dc
  4. 22d ago Changed · +4 lines · +49 tokens per session 573ad4655946
  5. 29d ago Changed · +8 lines dc4b7a904006
  6. 2mo ago Changed · +2 lines 6644e59484c1
  7. 2mo ago First seen · 429 lines · 102 tokens per session scan B 07edc0a7e29d

Subscribe to this mod's changes

mcp-page-authoring is a skill published in the GitHub repository unbounce/agent-plugins (2 stars, last pushed 5d ago), licensed MIT. It adds 151 tokens to every session and 6,976 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it B with 2 findings (subtle steering, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

CSS and stylingClaude CodeFrontendMarketing and SEOchatgptclaude-plugincodexlanding-pagesmcp
Related

mcp-page-authoring compared with skills from other repositories

mcp-page-authoring next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
mcp-page-authoringunbounce/agent-pluginsSkill25d agoMITB151Claude Code
12-brief-landing-pageminhnv0807/ai-business-skillsSkill6433d agoMITA145Claude Code
12-landing-page-brief-globalminhnv0807/ai-business-skillsSkill6433d agoMITA0Claude Code
49-html-email-template-globalminhnv0807/ai-business-skillsSkill6433d agoMITA167Claude Code
49-html-email-templateminhnv0807/ai-business-skillsSkill6433d agoMITA167Claude Code
image-post-processorXuanRanL/loamwright-SEO-SkillSkill522mo agoApache-2.0A51Claude Code
pretextNousResearch/hermes-agentSkill262ktodayMITA13Claude Code, Codex