Walter Writes AI Review: the Detector, the Humanizer and the Claude Connector
Partner Walter Writes is a Prompt Hackers partner, and this review is part of that partnership. It has no Prompt Hackers Score, and it isn't part of the rankings in our AI tools catalog.
Walter Writes is a fit if you draft with AI and want one account that checks a text for AI patterns and rewrites the stiff parts in your voice. You paste a draft into the Walter Writes AI detector, see which sections score as AI, and rework them with the humanizer. The same tools also run inside Claude through an MCP connector. Plans start at $8 a month billed yearly.
What one account includes
Every plan on the pricing page carries the same toolset: the humanizer, the built-in AI detector and MCP server access. Plans differ only in how many words you can process. Around that core sit a Chrome extension for humanizing text on any page, a mobile app and a grammar checker.
The AI detector
Paste text or upload a document and you get an AI-probability percentage for the whole piece plus a breakdown by section, so you can see which paragraphs pulled the score up. The detector page lists ChatGPT, Claude and Gemini output as what it detects, in 20+ languages, including Spanish, French, German and Portuguese.
Walter doesn't publish an accuracy rate or a false-positive rate, and its pricing FAQ says results can vary. Treat the percentage as a pointer to the paragraphs worth rereading.
The humanizer
The humanizer rewrites at the level of sentence structure, not single words, and it has three strengths: Simple, Standard and Enhanced. Simple keeps close to your draft; Enhanced rebuilds more of it. The home page says it keeps your intent, tone and style, and that it works in 80+ languages, a wider range than the detector covers.
The free trial on the same page covers 300 words and doesn't ask for a card. That's enough to run a 100-word excerpt of your own through all three strengths and compare.
Walter inside Claude
The connector is why Walter suits people who already write in Claude. It adds three tools to a Claude chat, per Walter's setup guide: Humanize, Detect, and Batch Humanize, which takes up to 25 items in one call. Humanize leaves keywords, brand names, links and document structure where you put them.
Add it in Claude as a custom connector with this server URL, then sign in with your Walter account:
https://mcp-server.walterwrites.ai/mcpThere's a Codex version too.
Walter also publishes 12 open-source Claude skills under the MIT licence: an SEO writer, a newsletter writer, a programmatic SEO skill, a brand voice adapter and eight more. Install all of them in Claude Code, Cursor or Windsurf with one line:
npx skills add walterwritesai/walter-skillsThe skills hold the instructions; the humanizing and detection come from the connector, so install both. If skills are new to you, start with how Claude Skills work.
Pricing
| Plan | Monthly | Billed yearly, per month | Words a month | Words per request |
|---|---|---|---|---|
| Starter | $12 | $8 | 30,000 | 750 |
| Pro | $23 | $13 | 70,000 | 1,500 |
| Elite | $47 | $26 | 200,000 | 2,000 |
| Teams (10 members) | $139 | $99 | 500,000 | 2,000 |
Prices are from the pricing page on 10 November 2026, in USD before tax. The API for developers is billed separately through the API platform.
Security
Walter's Trust Center lists SOC 2 Type I and Type II reports, which a company can request before rolling the tool out to a team.
Who should pick Walter Writes
Pick it if you draft in Claude and want detection and rewriting without leaving the chat. Pick it too if you write in more than one language. Starter's 30,000 words a month covers about ten 3,000-word articles, sent in 750-word pieces; agencies batching client copy should look at Elite or Teams for the 2,000-word requests.
If you need a detector to decide anything about another person's work, such as a grade or a hire, don't rely on a single tool's percentage, Walter's included. Read the score next to the writer's drafts and history, as our guide to AI detectors recommends.