Rephrasy

io.github.rephrasyaiPublished by GitHub account rephrasyaiv0.1.0Updated Oct 24, 2026

Humanize AI text and check AI-detection scores from Claude, Cursor, or any MCP client.

VerifiedSTDIODesktop onlyProductivity & WorkflowAI & ML

Overview

AI-generated overview

Lets an assistant rewrite AI-generated text into a more human style and score how likely text is to be flagged as AI-written.

What you can do
The server exposes two tools. The humanize tool rewrites AI-generated text in a natural, human style while preserving meaning, and returns the rewritten text plus the number of words charged. The detect tool scores how likely a text is to be flagged as AI-written, returning an overall score and optionally a per-sentence breakdown. Both tools run through the Rephrasy API from an MCP client such as Claude or Cursor.
When to use it
Useful when drafting or editing text that must read as human-written, or when checking a draft's AI-detection score before publishing. It fits editor and agent workflows where rewriting and verification happen in the same session.
Requirements
A local Node.js runtime to run the npm package @rephrasy/mcp over stdio, plus a Rephrasy API key supplied in the REPHRASY_API_KEY environment variable. The key comes from a Rephrasy account (Account, then API). Network access to the Rephrasy service is required.
Before you install
The REPHRASY_API_KEY secret is passed in the client configuration and should be kept out of shared files. Both tools bill against your Rephrasy plan, and humanize reports the number of words charged, so usage costs money. Text submitted to the tools is sent to the Rephrasy service.

Installation

In SourceWeft

  1. Open Rephrasy in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

Rephrasy MCP Server

[npm]

Use Rephrasy from Claude, Cursor, or any MCP client: humanize AI-generated text and images, and check AI-detection scores, without leaving your editor or agent workflow.

Four tools, one API key:

ToolWhat it does
humanizeRewrites AI-generated text in a natural, human style while preserving meaning
detectScores how likely a text is to be flagged as AI-written (overall + optional per-sentence)
humanize_imageHumanizes a local or remote image and saves the result next to the original
get_image_resultCollects an image that was still processing (free)

Setup

1. Get an API key — sign in at rephrasy.ai → Account → API. Both tools bill against your Rephrasy plan.

2. Add the server to your client:

Claude Code

bash
claude mcp add rephrasy -e REPHRASY_API_KEY=<your-key> -- npx -y @rephrasy/mcp

Claude Desktop

Add to claude_desktop_config.json (Settings → Developer → Edit Config):

json
{  "mcpServers": {    "rephrasy": {      "command": "npx",      "args": ["-y", "@rephrasy/mcp"],      "env": { "REPHRASY_API_KEY": "<your-key>" }    }  }}

Cursor

Add to .cursor/mcp.json (project) or ~/.cursor/mcp.json (global):

json
{  "mcpServers": {    "rephrasy": {      "command": "npx",      "args": ["-y", "@rephrasy/mcp"],      "env": { "REPHRASY_API_KEY": "<your-key>" }    }  }}

Until the package is on npm you can run it straight from GitHub: replace "args": ["-y", "@rephrasy/mcp"] with "args": ["-y", "github:rephrasyai/rephrasy-mcp"].

Hosted server (no install)

Rephrasy also runs a hosted MCP server, so clients that speak streamable HTTP need nothing installed locally:

bash
claude mcp add rephrasy https://v2-humanizer.rephrasy.ai/mcp -t http \  -H "Authorization: Bearer <your-key>"

It supports OAuth as well — ChatGPT and other clients that require it discover it from the server and send you through a one-time consent page, so the key never reaches the client. The hosted server carries a wider tool set (engine recommendations, readability, bring-your-own-key detectors). Full docs: https://rephrasy.ai/mcp.

Tools

humanize

ParameterTypeRequiredDescription
textstringyesThe text to humanize
modelstringnoRephrasy model, default "v4" (recommended). See Models
languagestringnoOutput language hint (e.g. "en", "de"); defaults to input language

Returns the rewritten text plus the number of words charged.

Models
modelWhen to use it
v4Default and recommended. Natural rhythm and sentence variety, length close to the source.
superstealthNewest. Built for the highest bypass rates, recommended against Pangram. Slower: 10–60 s per request.
ft_clean-v3Highest meaning retention and near-identical length — technical writing and anything with figures.
Undetectable ModelBest against academic detectors.
SEO ModelSimple, informal phrasing built around keywords.
<writing style id>Rewrites in one of your saved Writing Styles.

v3 and Undetectable Model v2 are retired. Old calls keep working: the API routes v3 to superstealth and v2 to v4. The v3-only style parameter is gone.

detect

ParameterTypeRequiredDescription
textstringyesThe text to score (max 15,000 characters)
per_sentencebooleannoIf true, also returns a score per sentence

Returns JSON with scores.overall (lower = more human-like) and, in per-sentence mode, sentences.

humanize_image

ParameterTypeRequiredDescription
pathstringone ofLocal image file (PNG, JPEG or WEBP, max 4 MB)
urlstringone ofOr an http(s) link to the image
qualitystringno"standard" (default, usually under a minute) or "hq" (about 4 minutes)
output_pathstringnoWhere to save the result; defaults to <name>-humanized.<ext> next to the input

A diffusion pass removes invisible AI watermarks such as SynthID while subject, composition and resolution stay the same. Costs 10 credits on standard and 20 on hq; a failed image is refunded. Standard images are usually saved within the call. If a job is still running, the tool returns a job_id instead.

get_image_result

ParameterTypeRequiredDescription
job_idstringyesThe job_id from humanize_image
output_pathstringnoWhere to save the result

Waits up to about 50 seconds per call and saves the image once it is done. Results stay available for 72 hours and also show up in your image history on rephrasy.ai.

Example prompts

  • "Humanize this paragraph, then run detect on the result to verify it."
  • "Humanize this essay with superstealth so it passes Pangram."
  • "Rewrite my draft with the humanize tool using model <style-id> (my writing style)."
  • "Check which sentences of this post read as AI-written."
  • "Humanize ~/Desktop/hero.png in hq and tell me where you saved it."

Development

bash
npm installnpm run buildREPHRASY_API_KEY=<key> node dist/index.js   # runs on stdio

License

MIT © Rephrasy

Source: README.md at commit 579032c

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v0.1.0LatestSep 16, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts