PDF Slim MCP MCP server

The PDF Slim MCP server enables AI agents to compress PDFs to exact target sizes, perform lossless optimization, and inspect PDF metadata such as page count and password status. It leverages MuPDF compiled to WebAssembly on Cloudflare Workers to achieve significant size reductions while maintaining quality.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by PDF Slim

MCP endpoint (Streamable HTTP)

https://api.pdfslim.app/mcp

Vendor documentation

What you can do with it

Compress PDFs to a specific target file size
Perform lossless optimization of PDF documents
Inspect PDF page count, size, and password status

Tools advertised by the last live check:

compress_pdf
optimize_pdf
inspect_pdf

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http pdf-slim-mcp https://api.pdfslim.app/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add pdf-slim-mcp --url https://api.pdfslim.app/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable pdf-slim-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "pdf-slim-mcp": {
      "url": "https://api.pdfslim.app/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "pdf-slim-mcp": {
      "type": "streamableHttp",
      "url": "https://api.pdfslim.app/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start pdf-slim-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "pdf-slim-mcp": {
      "type": "http",
      "url": "https://api.pdfslim.app/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http pdf-slim-mcp https://api.pdfslim.app/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "pdf-slim-mcp": {
      "url": "https://api.pdfslim.app/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "pdf-slim-mcp": {
      "serverUrl": "https://api.pdfslim.app/mcp"
    }
  }
}

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