Agentcairn vs Statelessagent

In-depth architectural comparison of the Agentcairn and Statelessagent 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 Agentcairn 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: Plain Markdown Obsidian vault as canonical memory store, Rebuildable DuckDB index for hybrid BM25, vector, and graph recall, Non-lossy memory capture with supersession and secret redaction.

Explore Agentcairn Details

Choose Statelessagent when:

• You need dedicated capabilities in the Knowledge & Memory domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: API Key required (Free / Open Source).
• Primary tools included: Provenance tracking and stale knowledge detection, Dual-layer memory with atomic fact extraction, 19 MCP tools for session handoffs, decisions, and search.

Feature & Specification Comparison

Specification	Agentcairn ccf Knowledge & Memory	Statelessagent sgx-labs Knowledge & Memory
Summary	Local-first agent memory: a plain-Markdown Obsidian vault is the source of truth, with a rebuildable DuckDB index for hybrid BM25 + vector + graph recall. Non-lossy capture with secret redaction; works across Claude Code, Codex, Cursor, and any MCP host. uvx agentcairn	Memory with provenance tracking — records where agent knowledge originated and detects when sources change. 17 MCP tools for session handoffs, decisions, semantic search, and knowledge graph. Works across Claude Code, Cursor, Windsurf, Codex CLI, and Gemini CLI. Single Go binary, SQLite + vector search, fully local.
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": {
    "ccf-agentcairn": {
      "command": "uvx",
      "args": [
        "agentcairn"
      ]
    }
  }
}

{
  "mcpServers": {
    "sgx-labs-statelessagent": {
      "command": "npx",
      "args": [
        "-y",
        "same@latest"
      ]
    }
  }
}

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