io.github.BetaBots-LLC/callimachus

callimachus-mcp

MCP server for Callimachus: local index and search of your AI coding-agent threads

36/wk 8 tools GitHub npm

No known CVEs

AGPL-3.0 license

Maintained

Last commit 105d ago

Works with most clients

Transport: stdio, sse

8 tools · ~438 tok

Grade A · 0.2% of 200K ctx

MCPpedia last refreshed this data 2d ago

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io.github.BetaBots-LLC/callimachus is an MCP server that MCP server for Callimachus: local index and search of your AI coding-agent threads. Its tool list has not been published yet over stdio and sse, requires no API key, and scores 78/100 on MCPpedia's security, maintenance and efficiency rubric.

Other

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktopstdio, sse · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "io-github-betabots-llc-callimachus": {
      "args": [
        "-y",
        "callimachus-mcp"
      ],
      "command": "npx"
    }
  }
}

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What io.github.BetaBots-LLC/callimachus does

MCP server for Callimachus: local index and search of your AI coding-agent threads

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked - your result helps other developers.

npx -y 'callimachus-mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

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Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

78/100across 5 weighted dimensions

How we score →

0255075100

−22

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked callimachus-mcp against OSV.dev.

Inventory

Tools (8)

Click any tool to inspect its schema.

~438 tokens total

Community

Reviews

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How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.BetaBots-LLC/callimachus safe to use?: io.github.BetaBots-LLC/callimachus has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under AGPL-3.0.
How do I install io.github.BetaBots-LLC/callimachus?: io.github.BetaBots-LLC/callimachus supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can io.github.BetaBots-LLC/callimachus do?: io.github.BetaBots-LLC/callimachus provides 8 tools: Download, Stack, Monorepo, Develop, Tests and 3 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with io.github.BetaBots-LLC/callimachus?: io.github.BetaBots-LLC/callimachus is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse transport.
Is io.github.BetaBots-LLC/callimachus actively maintained?: io.github.BetaBots-LLC/callimachus is less actively maintained - last commit was 105 days ago.

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Community

Discussion

Start a conversation

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Has anyone used this with Cursor?How do you handle auth?Any alternatives?

What it does

Indexes every conversation from 11 coding agents into one local SQLite store — Claude Code, Codex, Cursor, Gemini CLI, Qwen Code, Goose, OpenCode, Continue, Cline, Roo Code, and Kilo Code. Adding another source is a small, documented contract.

Searches them with hybrid ranking: keyword (SQLite FTS5 / BM25) fused with on-device semantic similarity (sqlite-vec KNN, no cloud) via Reciprocal Rank Fusion. Filter by source, project, subagents, starred, and tags.

Finds code-aware — type file:embed/mod.rs in the search bar (or cal files <path>) to find every thread that touched a path; backed by a file-mention index built at index time.

Distills knowledge — free heuristic TODO extraction, plus opt-in LLM distillation of decisions, gotchas, and summaries, with cross-thread semantic recall of past decisions/gotchas. Optional auto-distillation drains new/changed threads in the background so memory self-populates. Runs on local Ollama (keyless), your logged-in Claude Code or Codex CLI subscription (keyless, no API key), or a cloud API key.

Curates the facts — pin, edit, or delete distilled facts so your edits survive re-distilling, plus an LLM "Review conflicts" pass that flags decisions that contradict each other.

Remembers per project — a Projects tab aggregates each repo's decisions, gotchas, and open TODOs into durable memory (grouped by a canonical project key, so worktrees / symlinks / ~ don't split one repo), with an LLM brief and a managed .callimachus/memory.md. That memory is prepended when you "Open in CLI", and you can inject it into any agent automatically: Update AGENTS.md (or cal agents) writes a managed block into the repo's AGENTS.md / CLAUDE.md, and cal hook feeds it to a Claude Code SessionStart hook.

Asks your history (RAG) — a synthesized, cited answer over your own threads, with [thread N] citations back to the sources it used. Needs an LLM engine (Knowledge/distillation enabled).

Organizes into collections — star threads and attach free-form tags, then filter the list by starred or by tag.

Chats with an in-app agent (Anthropic / OpenAI / Gemini / OpenRouter / Ollama — local or Cloud — or your logged-in Claude Code / Codex CLI with no key) that can search your own history and run shell commands with your approval; streaming, cancellable, with live model lists. Chats are saved and

Frequently Asked Questions

Is io.github.BetaBots-LLC/callimachus safe to use?

io.github.BetaBots-LLC/callimachus has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under AGPL-3.0.

How do I install io.github.BetaBots-LLC/callimachus?

io.github.BetaBots-LLC/callimachus supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can io.github.BetaBots-LLC/callimachus do?

io.github.BetaBots-LLC/callimachus provides 8 tools: Download, Stack, Monorepo, Develop, Tests and 3 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with io.github.BetaBots-LLC/callimachus?

io.github.BetaBots-LLC/callimachus is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse transport.

Is io.github.BetaBots-LLC/callimachus actively maintained?

io.github.BetaBots-LLC/callimachus is less actively maintained - last commit was 105 days ago.

What it does

Finds code-aware — type file:embed/mod.rs in the search bar (or cal files <path>) to find every thread that touched a path; backed by a file-mention index built at index time.

Curates the facts — pin, edit, or delete distilled facts so your edits survive re-distilling, plus an LLM "Review conflicts" pass that flags decisions that contradict each other.

Asks your history (RAG) — a synthesized, cited answer over your own threads, with [thread N] citations back to the sources it used. Needs an LLM engine (Knowledge/distillation enabled).

Organizes into collections — star threads and attach free-form tags, then filter the list by starred or by tag.