Unpaywall vs Zetesis

In-depth architectural comparison of the Unpaywall and Zetesis 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.

Which MCP Server Should You Choose?

Choose Unpaywall 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).

Explore Unpaywall Details

Choose Zetesis 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).

Explore Zetesis Details

Feature & Specification Comparison

Specification	Unpaywall Research	Zetesis Research
Summary	Unpaywall MCP — open-access lookup for scholarly papers (free, no key)	Scientific due diligence on a claim, sealed in a verifiable attestation. Free screen, gated dossier.
Category & Scope	Research	Research
Quality signal

Tools & Capabilities Breakdown

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).

{
  "mcpServers": {
    "unpaywall-2": {
      "url": "https://api.unpaywall.org/v2/"
    }
  }
}

{
  "mcpServers": {
    "zetesis": {
      "command": "uvx",
      "args": [
        "--from",
        "zetesis",
        "zetesis-client"
      ]
    }
  }
}

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