How do I install App Kit?

Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does App Kit need an API key?

No required environment variable is listed on this record.

When was App Kit last checked?

Last checked 2026-11-09. SEO audit (400 checks), text readability and grammar check, PDF to images, image conversion.

App Kit MCP server

Power your agent

Add this server

The publisher's own URL. Not a PlugMCP endpoint.

Add to Cursor Add in Claude Add to VS Code Run on PlugMCP

Host a copy with our keys and logs.

Server URL

https://mcp.app-kit.dev/mcp

The Claude button above opens Claude with the name and URL filled in. You still confirm it there.

shClaude Code

1claude mcp add --transport http io.github.app-kit-dev-mcp https://mcp.app-kit.dev/mcp

Run in a terminal.

jsonClaude Desktop

1{2  "mcpServers": {3    "io.github.app-kit-dev-mcp": {4      "command": "npx",5      "args": [6        "-y",7        "mcp-remote",8        "https://mcp.app-kit.dev/mcp"9      ]10    }11  }12}

claude_desktop_config.json

Remote · HTTPPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Remote

Transport: http
Version: 0.1.3
Last checked

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Questions

App-Kit MCP

Remote MCP server for SEO audits, text readability and grammar checks, image conversion (PNG/JPEG/WebP) and PDF to images - for Claude, Cursor, VS Code, Windsurf and any other MCP client. Free tier with daily limits, no sign-up.

https://mcp.app-kit.dev/mcp

Русская версия | Tools reference | app-kit.dev

This repository holds the public documentation, client configs and registry metadata. The server itself is a hosted service operated by App-Kit; there is nothing to install.

What it does

SEO audit of a website - score 0-100 by group, failed checks and the five biggest losses. The engine runs 400 checks (technical SEO, performance, structured data, AI-readiness and more); the fast mode covers up to 10 pages in about a minute.
Text check - readability, "water" and keyword stuffing metrics, stop phrases and grammar (LanguageTool) for Russian and English, up to 20 000 characters. Returns positions of issues, not copies of your text.
PDF and images - PDF pages to PNG/JPEG/WebP, images to PDF, format conversion (WebP/AVIF compression is coming soon). Files are passed by URL or via a one-time upload link, never as huge base64 strings in the chat.

Quick start

Works anonymously out of the box. For higher limits, get a free token on app-kit.dev/mcp (one click, no email) and pass it either as a header Authorization: Bearer mcpf_... or in the URL: https://mcp.app-kit.dev/mcp/t/mcpf_....

Claude Code

claude mcp add --transport http app-kit https://mcp.app-kit.dev/mcp

# with a free token
claude mcp add --transport http app-kit https://mcp.app-kit.dev/mcp \
  --header "Authorization: Bearer mcpf_your_token"

Add --scope user to make it available in every project. See examples/claude-code.sh.

Claude.ai and Claude Desktop

Customize > Connectors > + > Add custom connector. Name: App-Kit, Remote MCP server URL: https://mcp.app-kit.dev/mcp/t/mcpf_your_token (the token in the URL is recommended: requests from claude.ai share Anthropic's IP addresses, so anonymous limits there are a small shared pool). Authentication: no sign-in. Free Claude plans allow one custom connector. Details: examples/claude-desktop/claude.ai.md.

Cursor

.cursor/mcp.json in the project or ~/.cursor/mcp.json globally (example):

{
  "mcpServers": {
    "app-kit": {
      "url": "https://mcp.app-kit.dev/mcp",
      "headers": { "Authorization": "Bearer mcpf_your_token" }
    }
  }
}

VS Code (GitHub Copilot agent mode)

.vscode/mcp.json (example); VS Code asks for the token once and stores it securely:

{
  "inputs": [
    { "type": "promptString", "id": "app-kit-token", "description": "App-Kit MCP free token (mcpf_...)", "password": true }
  ],
  "servers": {
    "app-kit": {
      "type": "http",
      "url": "https://mcp.app-kit.dev/mcp",
      "headers": { "Authorization": "Bearer ${input:app-kit-token}" }
    }
  }
}

Windsurf (Devin Desktop)

Open the MCP config from the Cascade MCP settings (mcp_config.json) and add a server with serverUrl. ${env:VAR} is expanded in headers:

{
  "mcpServers": {
    "app-kit": {
      "serverUrl": "https://mcp.app-kit.dev/mcp",
      "headers": { "Authorization": "Bearer ${env:APPKIT_MCP_TOKEN}" }
    }
  }
}

Other clients

Any client that supports remote MCP over Streamable HTTP: URL https://mcp.app-kit.dev/mcp, optional header Authorization: Bearer mcpf_.... Clients that cannot set headers can use https://mcp.app-kit.dev/mcp/t/mcpf_....

Tools

Full descriptions and JSON Schemas: docs/tools.md (generated from the live tools/list).

Tool	What it does	Example prompt
`seo_audit_fast`	Fast SEO audit of a site root (up to 10 pages): score, failed checks, top-5 losses. Waits up to 60 s, then returns a `handle`	"Run an SEO audit of example.com and tell me what to fix first"
`seo_audit_status`	Status and result of an audit by `handle`	(called by the model automatically)
`text_check`	Readability, water/spam metrics, stop phrases, grammar; `lang` ru/en, up to 20 000 chars	"Check this landing page copy for readability and grammar: ..."
`quota_status`	Your access level and remaining free calls per tool	"How many free App-Kit checks do I have left today?"
`image_convert`	Convert between PNG, JPEG, WebP, BMP, TIFF, GIF	"Convert this logo to PNG: https://example.com/logo.webp"
`pdf_to_images`	Render PDF pages (up to 20) to PNG/JPEG/WebP	"Turn pages 1-3 of https://example.com/deck.pdf into PNG at 150 dpi"
`images_to_pdf`	Merge up to 20 images into one PDF	"Make a PDF from these 3 screenshots: ..."
`conversion_status`	Status and result of a long conversion by `handle`	(called by the model automatically)
`create_upload`	One-time upload URL for a local file (agents with a shell)	"Convert ./scan.pdf to PNG pages"
`image_compress` (coming soon)	Compress to WebP/AVIF with quality and resize options	"Compress https://example.com/hero.png to AVIF"

All tools are read-only: nothing is published or changed on your side. Results that are files come back as short-lived download links (10 minutes) plus a small preview.

Limits

Tool	Anonymous	Free token	Notes
`text_check`	10 / hour	20 / hour
`seo_audit_fast`	5 / hour	10 / hour	one domain: up to 20 audits per day from all users
`seo_audit_status`, `conversion_status`, `quota_status`	free	free	do not spend quota
`image_convert`	5 / hour	20 / hour
`pdf_to_images`, `images_to_pdf`	3 / hour	10 / hour	up to 20 pages / files, 20 MB
`create_upload`	10 / hour	30 / hour	up to 20 MB, link valid 10 min

Every response includes quota (remaining, reset_at, tier, upgrade_url). The free tier also has a shared daily budget per tool; when it runs out, the tool says so and resets at 00:00 UTC. Limits may be tuned without notice; the current values are always in the tool descriptions and quota_status.

Pricing

The free tier above stays free. Higher limits, full multi-page SEO audits with PDF reports and larger files are part of the paid App-Kit API and are billed in App-Kit credits - see app-kit.dev.

Privacy

Processing happens in Germany (EU).
Text you send to text_check is not stored; only metrics are returned.
Files are kept only while being processed and deleted within 15 minutes; download links expire in 10 minutes.
IP addresses are used only for anonymous rate limits, as a salted hash kept for at most 24 hours.
Usage logs contain the tool name, timing and status - no IP addresses, texts, file contents or full URLs.
Page content from audited sites is never returned verbatim: only scores, check codes and short, clipped fields marked as page data.

Full policy: app-kit.dev/mcp.

FAQ

Do I need an account? No. Anonymous use works; a free token (no email) raises the limits.

Why do anonymous calls from claude.ai run out quickly? claude.ai connects from Anthropic's shared IP range, so all anonymous claude.ai users share one small pool. Use a token in the URL.

Can it audit my staging site? Only publicly reachable sites. Private networks, localhost and non-standard ports are blocked.

Which MCP protocol versions are supported? Streamable HTTP, stateless: current MCP revisions and clients on 2025-11-25. No stdio package is needed.

A long audit returned status: running. What now? The model calls seo_audit_status with the handle after poll_after_s seconds. The handle works only for the caller and expires in 60 minutes.

Is the server open source? The server is a hosted service. This repository (docs, examples, registry metadata) is MIT-licensed.

Where do I report a bug or a security issue? Bugs and ideas: issues. Security: see SECURITY.md.

App Kit

Add this server

Host a copy with our keys and logs.

Server facts

Tools

Questions

How do I install App Kit?

Does App Kit need an API key?

What transport does App Kit use?

When was App Kit last checked?

Documentation

App-Kit MCP

What it does

Quick start

Claude Code

Claude.ai and Claude Desktop

Cursor

VS Code (GitHub Copilot agent mode)

Windsurf (Devin Desktop)

Other clients

Tools

Limits

Pricing

Privacy

FAQ

Links