MCP server

Use Sounday from Claude Code, Cursor, Claude Desktop or any MCP client to check and humanize text while your agent writes.

The Sounday MCP server gives your agent three tools:

Tool	What it does	Needs a key
`check_style`	Scores text 0-100 and lists AI tells with fixes. Runs locally.	No
`rewrite_text`	Rewrites text to sound human with facts verified (`strength`, `keep`, `voice`).	Yes
`get_usage`	Plan and words used this month.	Yes

It runs locally over stdio through npx (Node 18 or newer).

Claude Code

claude mcp add sounday --env SOUNDAY_API_KEY=sd_... \
  -- npx -y --package=https://sounday.ai/dl/sounday.tgz sounday mcp

Cursor, Claude Desktop and other clients

Add this to your MCP configuration (.cursor/mcp.json, claude_desktop_config.json, ...):

{
  "mcpServers": {
    "sounday": {
      "command": "npx",
      "args": ["-y", "--package=https://sounday.ai/dl/sounday.tgz", "sounday", "mcp"],
      "env": { "SOUNDAY_API_KEY": "sd_..." }
    }
  }
}

Prompts that work well

"Write the blog post, then run it through Sounday rewrite_text keeping the keyword 'running shoes for flat feet'."
"Check every Markdown file in content/ with check_style and fix the AI tells it finds."
"Rewrite this landing page copy with Sounday at strength light; only accept it if facts_preserved is true."