Federal Register vs Obsidian Regulatory MCP

In-depth architectural comparison of the Federal Register and Obsidian Regulatory MCP 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 Federal Register when:

• You need dedicated capabilities in the Legal domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: Full-text document search, Document lookup by number, Agency and document-type coverage.

Explore Federal Register Details

Choose Obsidian Regulatory MCP when:

• You need dedicated capabilities in the Legal domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: Semantic search across 850+ official regulatory sources, Jurisdiction, framework, and status filters, Enforcement and product recall lookup.

Feature & Specification Comparison

Specification	Federal Register Legal	Obsidian Regulatory MCP Legal
Summary	Federal Register MCP — US Federal Register API (free, no auth)	Verified, tier-0 regulatory data for AI across 850+ official sources and 50+ jurisdictions.
Category & Scope	Legal	Legal
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": {
    "federal-register": {
      "command": "npx",
      "args": [
        "-y",
        "@pipeworx/mcp-federal-register"
      ]
    }
  }
}

{
  "mcpServers": {
    "obsidian-regulatory-mcp": {
      "url": "https://obsidianri.com/mcp"
    }
  }
}

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