0CompactMem vs Acheron MCP Server

In-depth architectural comparison of the 0CompactMem and Acheron MCP Server 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 0CompactMem when:

• You need dedicated capabilities in the Knowledge & Memory domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: SQLite WAL-backed persistent storage, BM25 and FTS5 memory retrieval, Importance-based scoring.

Explore 0CompactMem Details

Choose Acheron MCP Server when:

• You need dedicated capabilities in the Knowledge & Memory domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: Local SQLite persistence, Full-text context search, Context browsing and filtering.

Explore Acheron MCP Server Details

Feature & Specification Comparison

Specification	0CompactMem soolaugust Knowledge & Memory	Acheron MCP Server timmx7 Knowledge & Memory
Summary	Persistent memory MCP server with OS-style demand paging, kswapd-style eviction, and mlock pinning. Multi-agent shared SQLite store with BM25 + FTS5 retrieval, importance scoring, and capacity-aware reclaim. 5 tools: memorylookup, pinmemory, unpinmemory, memorystats, listpinned. uvx --from git+https://github.com/soolaugust/0CompactMem memory-os	Cross-surface persistent memory for Claude. Bridges context between Claude Chat, Code, and Cowork via local SQLite with full-text search. Save decisions, preferences, and insights in one surface, retrieve them in any other.
Category & Scope

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": {
    "soolaugust-0compactmem": {
      "command": "uvx",
      "args": [
        "--from"
      ]
    }
  }
}

{
  "mcpServers": {
    "timmx7-acheron-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "acheron-mcp-server"
      ]
    }
  }
}

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