ELF

Name: ELF
Availability: InStock
Author: hack-ink

Supports UI

by hack-ink

Evidence-linked fact memory for LLM agents with hybrid search and strict provenance.

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Works in:claude

Exposes:ToolsResources

View on GitHub Docs

What it does

Provides a memory service for LLM agents that stores short, evidence-linked facts. It uses Postgres with pgvector as the source of truth and Qdrant for fast retrieval, ensuring that every remembered fact is tied to specific evidence.

Tools

add_note: Store a deterministic fact with associated evidence.
add_event: Ingest an event using LLM-driven extraction to create evidence-bound notes.
search: Perform chunk-first hybrid search to retrieve relevant memories.
get_relation_context: Retrieve structured entity/relation facts for complex queries.

Installation

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "elf": {
      "command": "cargo",
      "args": ["run", "-p", "elf-mcp", "--", "-c", "elf.toml"]
    }
  }
}

Supported hosts

Claude Desktop

Quick install

cargo run -p elf-mcp -- -c elf.toml

Information

Pricing: free
Published: 5/1/2026
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Related Apps

Choose your AI client and follow the steps below.

Claude Desktop

{
  "mcpServers": {
    "elf": {
      "command": "cargo",
      "args": ["run", "-p", "elf-mcp", "--", "-c", "elf.toml"]
    }
  }
}

ELF