Best Writing Plugins, Skills, and MCP Servers in 2026
Research-backed writing skills, plugins, and MCP servers for drafting, editing, style, and translation.
Updated July 26, 2026
These extensions make an agent a genuinely useful writing partner. Drafting workflows run a real writing process instead of one-shot generation, style skills strip the AI tells and hold a standard, and translation servers put professional translation behind the agent. Pick by the job in front of you.
What it isAnthropic’s official skill for internal communication: status updates, announcements, and team memos written in a clear, direct voice from the bullet points and context you give it.When to useRecurring team communication you write weekly anyway. It keeps the format consistent and cuts the drafting time; for substantial documents, use Doc Co-Authoring instead.
What it isFour separately installable skills that form one long-form writing method: writing-fragments collects your raw material, writing-shape structures it, and writing-beats plans the argument beat by beat - shape and beats are alternative middle stages, pick one per piece - then edit-article rewrites the draft hard.When to useFor articles and essays where one-shot generation produces generic output. The stages work individually - edit-article alone is a strong editor - but the full method is what turns notes into a piece with an actual argument.
What it isAnthropic’s official co-writing skill. It aligns on purpose and audience first, drafts the document section by section, works your feedback in as it goes, and then tests whether a fresh reader would actually understand the result.When to useWorkplace documents where structure carries the weight - specs, proposals, decision docs, reports. Less suited to short posts, where the process is more ceremony than help.
What it isVercel’s concrete prose rules packaged as a skill: sentence length, hedging, filler, structure. Instead of editing afterwards, it steers how the agent writes while it writes.When to useWhen you want a consistent standard across everything the agent produces rather than fixing each draft. Pairs naturally with Humanizer - guidelines steer during, Humanizer cleans after.
What it isThe Chinese-language adaptation of Humanizer. It targets the patterns that mark machine-written Chinese - translated-sounding constructions, filler transitions, over-formal register - and rewrites them into natural prose.When to useAny Chinese writing an agent produces that people will actually read. The gap between raw model output and natural prose is even wider in Chinese than in English, and this targets it directly.
What it isA translation skill built on a three-step method: a literal pass, a critique of what reads unnaturally, then an idiomatic rewrite. Strongest for Chinese–English work, where the method originated.When to useContent you’ll publish, where a literal machine translation isn’t good enough. It costs more tokens than a one-shot translation and earns them on quality.
What it isThe original de-AI-ing skill. It works from a catalog of documented AI-writing signs - inflated transitions, empty emphasis, formulaic structure - and rewrites drafts so the patterns disappear rather than just get rephrased.When to useAs a final pass over anything going out under your name. It edits what was written; if you want the agent to write differently in the first place, add Writing Guidelines alongside it.
What it isA community suite of 18 academic-writing skills: paper structure, section drafting, polishing prose to journal register, reviewer responses, and figures. Each skill installs separately, and the count shown is the most-installed one (nature-figure) - adoption spreads across the suite rather than pooling in one skill.When to usePapers, theses, and grant writing - it encodes the conventions reviewers expect instead of leaving them to the model’s defaults. For general articles it over-formalizes; use Matt Pocock Writing Skills instead.
What it isTranslated’s official MCP server for its Lara translation platform: text translation, language detection, and context handling, served from a hosted endpoint with a local npm alternative from the same repository.When to useVolume translation through a dedicated engine rather than the model itself. The hosted endpoint sets up with a browser login, so there’s no local server to run.What you needA Lara account, authorized via browser OAuth; free, Pro, and Team tiers are documented.
What it isA blunt instrument: hard bans on the words and constructions that mark AI slop. No rewriting philosophy, just a list the agent is not allowed to touch.When to useWhen Humanizer’s full rewrite is more than you want and you just need the worst offenders gone. Cheap to run, easy to keep on permanently.
What it isDeepL’s official MCP server, run locally from npm and backed by the DeepL API: text and document translation, rephrasing, language operations, and your organization’s glossaries.When to useTeams that already standardize on DeepL and need terminology to stay consistent across translations. For one-off translation, a skill like Baoyu Translate costs nothing.What you needA DeepL API key and Node.js 18+ - the server runs on your machine via npm.
What it isCrowdin’s official hosted MCP server for localization operations: projects, source strings, translations, and terminology, worked on from inside the agent.When to useOngoing product localization - many languages, many strings, continuous updates. Not for translating a single document; use DeepL or a translation skill for that.What you needA Crowdin account with a localization project.
Internal Comms
Matt Pocock Writing Skills
Writing Guidelines
Humanizer ZH
Lara Translate
DeepL
Crowdin
Skill
MCP
