Cairn.ink Memory vs Memento

In-depth architectural comparison of the Cairn.ink Memory and Memento 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?

C

Choose Cairn.ink Memory 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).

Explore Cairn.ink Memory Details

Choose Memento 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).

Explore Memento Details

Feature & Specification Comparison

Specification	C Cairn.ink Memory Knowledge & Memory	Memento Knowledge & Memory
Summary	Cross-session memory for AI agents with a Source Receipt for every memory, over MCP.	Local-first, LLM-agnostic memory layer for AI assistants.
Category & Scope	Knowledge & Memory	Knowledge & Memory
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": {
    "cairn-ink-memory": {
      "command": "npx",
      "args": [
        "-y",
        "cairn-ink-memory"
      ]
    }
  }
}

{
  "mcpServers": {
    "memento": {
      "command": "npx",
      "args": [
        "-y",
        "@psraghuveer/memento"
      ]
    }
  }
}

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