What is the key difference between Citeguard and Keryx?

Citeguard belongs to the Research category with local stdio execution, while Keryx belongs to the Research category with cloud HTTP/SSE execution.

How do I install Citeguard or Keryx in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Citeguard and Keryx free or paid?

Citeguard operates under a Free / Open Source model (No auth required). Keryx operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Citeguard lists 6 tools with 0 views and 1 GitHub stars. Keryx lists 6 tools with 0 views and 3 GitHub stars.

Can I use both Citeguard and Keryx together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Citeguard vs Keryx

In-depth architectural comparison of the Citeguard and Keryx MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Citeguard

Research · Local stdio

Quality: 40/100 (Fair) | Auth: No auth required

Keryx

Research · Remote HTTP/SSE

Quality: 41/100 (Fair) | Auth: No auth required

Verdict Summary: Choose Citeguard if you need specialized Research tools running via a local process. Choose Keryx if your workspace requires Research integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Citeguard when:

You need dedicated capabilities in the Research domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: Multi-source academic citation verification, Identifier-first DOI and arXiv lookup, Metadata mismatch detection with correction suggestions.

Explore Citeguard Details

Choose Keryx when:

You need dedicated capabilities in the Research domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: Budgeted autonomous source selection, Buy, skip, and cache decisions, USDC x402 payments on Arc.

Explore Keryx Details

Feature & Specification Comparison

Specification	Citeguard Research	Keryx Research
Summary	Falsification-first citation auditor: existence, metadata, and claim-support checks via MCP.	Autonomous research agent that pays every source it cites in USDC on Arc via x402 micropayments.
Category & Scope	Research	Research
Quality signal

Tools & Capabilities Breakdown

Citeguard Tools (6)

Multi-source academic citation verification

Identifier-first DOI and arXiv lookup

Metadata mismatch detection with correction suggestions

Claim-support analysis with evidence scope

Batch citation and claim auditing

Open-access full-text support checks

Keryx Tools (6)

Budgeted autonomous source selection

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Citeguard Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "citeguard-3": {
      "command": "uvx",
      "args": [
        "citationguard"
      ]
    }
  }
}

Keryx Configuration