What is the key difference between Obsidian Semantic Search and Postgres MCP?

Obsidian Semantic Search belongs to the Databases category with local stdio execution, while Postgres MCP belongs to the Databases category with local stdio execution.

How do I install Obsidian Semantic Search or Postgres MCP 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 Obsidian Semantic Search and Postgres MCP free or paid?

Obsidian Semantic Search operates under a Free / Open Source model (No auth required). Postgres MCP operates under a Free / Open Source model (API Key required).

Which MCP server has more tools and community activity?

Obsidian Semantic Search lists 4 tools with 2 views and 1 GitHub stars. Postgres MCP lists 6 tools with 1 views and 3,327 GitHub stars.

Can I use both Obsidian Semantic Search and Postgres MCP 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

Obsidian Semantic Search vs Postgres MCP

In-depth architectural comparison of the Obsidian Semantic Search and Postgres 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.

At a Glance & Executive Verdict

Obsidian Semantic Search

Databases · Local stdio

Quality: 49/100 (Fair) | Auth: No auth required

Postgres MCP

Databases · Local stdio

Quality: 59/100 (Good) | Auth: API Key required

Verdict Summary: Choose Obsidian Semantic Search if you need specialized Databases tools running via a local process. Choose Postgres MCP if your workspace requires Databases integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Obsidian Semantic Search when:

You need dedicated capabilities in the Databases domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: index_status, index_vault, search_notes.

Explore Obsidian Semantic Search Details

Choose Postgres MCP when:

You need dedicated capabilities in the Databases domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (Free / Open Source).
You have access to required keys: DATABASE_URI.
Primary tools included: Database health checks including index, vacuum, replication, and cache analysis, Industrial-strength index tuning algorithms, EXPLAIN plan validation and hypothetical index simulation.

Feature & Specification Comparison

Specification	Obsidian Semantic Search Databases	Postgres MCP crystaldba Databases
Summary	Read-only semantic search MCP server for Obsidian vaults using local Ollama embeddings.	All-in-one MCP server for Postgres development and operations, with tools for performance analysis, tuning, and health checks
Category & Scope	Databases

Tools & Capabilities Breakdown

Obsidian Semantic Search Tools (4)

index_status

Returns index metadata and safety settings.

index_vault

Builds or updates the external SQLite index.

search_notes

Searches notes with hybrid semantic and keyword ranking.

read_note

Reads a note or line range by vault-relative path.

Postgres MCP Tools (6)

Database health checks including index, vacuum, replication, and cache analysis

Industrial-strength index tuning algorithms

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).

Obsidian Semantic Search Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "obsidian-semantic-search": {
      "command": "npx",
      "args": [
        "-y",
        "--package",
        "@dalecb/obsidian-semantic-mcp",
        "obsidian-semantic-mcp-setup"
      ]
    }
  }
}

Postgres MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "crystaldba-postgres-mcp": {
      "command": "uvx",
      "args": [
        "postgres-mcp"
      ],
      "env": {
        "DATABASE_URI": "YOUR_DATABASE_URI_HERE"
      }
    }
  }
}

Frequently Asked Questions

Obsidian Semantic Search is categorized under Databases and uses a local stdio subprocess. In contrast, Postgres MCP belongs to Databases using local stdio subprocess. Select Obsidian Semantic Search when you need capabilities focused on databases and Postgres MCP when you require tools for databases.

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