Which integrations are available for this server?

Allows using Google's Gemini embedding and chat completion models for semantic code search and summarization. Allows using OpenAI's embedding and chat completion models for semantic code search and summarization.

Better Code Review Graph

mcp-name: io.github.n24q02m/better-code-review-graph

Knowledge graph for token-efficient code reviews -- semantic search and call-graph resolution across your codebase.

codecov PyPI Docker License: MIT

Python MCP semantic-release Renovate

Project	Tagline	Tag
better-code-review-graph	Knowledge graph for token-efficient code reviews -- semantic search and call-...	MCP
better-email-mcp	IMAP/SMTP email for AI agents -- read, send, organize folders, and manage att...	MCP
better-godot-mcp	Composite MCP server for Godot Engine -- 17 composite tools for AI-assisted g...	MCP
better-notion-mcp	Markdown-first Notion for AI agents -- pages, databases, blocks, and comments...	MCP
better-telegram-mcp	Telegram for AI agents -- messages, chats, media, and contacts across both bo...	MCP
claude-plugins	Claude Code plugin marketplace for the n24q02m MCP servers -- install web sea...	Marketplace
imagine-mcp	Image and video understanding + generation for AI agents -- across Gemini, Op...	MCP
jules-task-archiver	Chrome Extension for bulk operations on Jules tasks via batchexecute API -- a...	Tooling
mcp-core	Shared foundation for building MCP servers -- Streamable HTTP transport, OAut...	MCP
mnemo-mcp	Persistent AI memory with hybrid search and embedded sync. Open, free, unlimi...	MCP
qwen3-embed	Lightweight Qwen3 text embedding and reranking via ONNX Runtime and GGUF	Library
skret	Secrets without the server.	CLI
tacet	TACET: a self-distilling neuro-symbolic cascade that amortises LLM cost in kn...	Tooling
web-core	Shared web infrastructure package for search, scraping, HTTP security, and st...	Library
wet-mcp	Open-source MCP server for AI agents: web search, content extraction, and lib...	MCP

An MCP server that parses your codebase with Tree-sitter, builds a structural graph of functions/classes/imports, and gives Claude (or any MCP client) precise context so it reads only what matters instead of the whole tree. Semantic search runs on a local ONNX embedding model by default (zero config, no API key), with an optional cloud embedding chain. Fork of code-review-graph with fixed multi-word search, qualified call resolution, dual-mode embeddings, output pagination, and production CI/CD.

v2.0 migration (BREAKING)

v2.0 adds temporal columns (valid_from_sha / valid_to_sha on every node + edge) and an opt-in security scanner. The schema migration is auto-applied on first GraphStore open, and a backup of the pre-2.0 DB is saved to <graph_db>.pre-2.0.bak so you can roll back. See BREAKING_CHANGES.md for the full schema-change list, behavior changes, environment requirements, and the downgrade procedure (CRG_DOWNGRADE_TO_1_X=1 uv run better-code-review-graph).

Related MCP server: SocratiCode

Install

The server runs over stdio by default and works with any MCP client. The recommended launcher is uvx (no install step -- it fetches and runs the published package in an isolated environment):

{
  "mcpServers": {
    "better-code-review-graph": {
      "command": "uvx",
      "args": ["--python", "3.13", "better-code-review-graph"],
      "env": { "MCP_TRANSPORT": "stdio" }
    }
  }
}

Or install it as a Python package:

uvx better-code-review-graph        # run without installing
pip install better-code-review-graph

The optional Semgrep engine for deeper security scans is a separate extra:

pip install 'better-code-review-graph[security]'

Install with an AI agent -- paste this to your AI coding agent:

Install MCP server better-code-review-graph following the steps at https://raw.githubusercontent.com/n24q02m/claude-plugins/main/plugins/better-code-review-graph/setup-with-agent.md

Full per-client setup (Claude Code, Codex, Gemini CLI, Cursor, Windsurf, raw mcp.json) is at mcp.n24q02m.com/servers/better-code-review-graph/setup/.

Configuration

Everything works out of the box with zero configuration -- semantic search uses a local qwen3-embed ONNX model (Qwen3-Embedding-0.6B, ~570 MB downloaded on first graph embed). All environment variables below are optional and only needed for cloud embeddings or LLM summaries.

Model chains

Embeddings and summaries are each driven by an ordered model chain -- a CSV of provider/model entries where the order is the litellm fallback order (first entry is the active model). The provider is inferred from the model prefix, so the matching <PROVIDER>_API_KEY is all you need to add.

Variable	Purpose	Empty (default)
`EMBEDDING_MODELS`	Cloud embedding chain, e.g. `jina_ai/jina-embeddings-v5-text-small,gemini/gemini-embedding-001`	Local ONNX (qwen3-embed)
`SUMMARY_MODELS`	Summarizer chain for `graph(action="summarize")`, e.g. `gemini/gemini-2.5-flash,openai/gpt-4o-mini`	Summaries disabled

All vectors are stored at a fixed 768 dimensions (MRL truncation), so the embeddings table schema stays valid across providers. Switching embedding model changes the vector space; embeddings are tracked per provider and a provider switch triggers re-embedding rather than mixing incomparable vectors.

Provider API keys

Cloud models need the provider key for whatever prefixes appear in your chains. Without any cloud key the server stays on local ONNX. Summarizers must expose a chat-completion API (so Jina and Cohere are embedding-only).

Model prefix	API key env var	Get a key
`jina_ai/`	`JINA_AI_API_KEY`	https://jina.ai/api-key
`gemini/`	`GEMINI_API_KEY` (or `GOOGLE_API_KEY`)	https://aistudio.google.com/apikey
`openai/` (or bare `text-embedding-*`)	`OPENAI_API_KEY`	https://platform.openai.com/api-keys
`cohere/`	`COHERE_API_KEY`	https://dashboard.cohere.com/api-keys
`vertex_express/`	`GOOGLE_VERTEX_EXPRESS_API_KEY`	https://cloud.google.com/vertex-ai/generative-ai/docs/start/express-mode/overview

Any other litellm provider works via its standard <PROVIDER>_API_KEY.

Advanced

Variable	Purpose
`EMBEDDING_API_BASE`	Custom OpenAI-compatible base URL for cloud embedding (SSRF-guarded)
`LLM_API_BASE`	Custom OpenAI-compatible base URL for the summarizer (SSRF-guarded)
`DISABLE_LOCAL_EMBED`	Skip the local ONNX download; embedding is unavailable unless a cloud chain is configured
`CRG_DATA_DIR`	Override the per-user data directory (default `~/.crg`) used for per-user graphs and credentials in HTTP multi-user mode
`EMBEDDING_BACKEND` / `EMBEDDING_MODEL` / `SUMMARY_MODEL`	Deprecated singular vars, honored one release with a warning -- migrate to the `*_MODELS` chains

Example -- cloud embeddings + summaries

{
  "mcpServers": {
    "better-code-review-graph": {
      "command": "uvx",
      "args": ["--python", "3.13", "better-code-review-graph"],
      "env": {
        "MCP_TRANSPORT": "stdio",
        "EMBEDDING_MODELS": "jina_ai/jina-embeddings-v5-text-small,gemini/gemini-embedding-001",
        "SUMMARY_MODELS": "gemini/gemini-2.5-flash",
        "JINA_AI_API_KEY": "jina_...",
        "GEMINI_API_KEY": "AIza..."
      }
    }
  }
}

You can also configure cloud keys interactively in HTTP mode via the relay setup form (config(action="setup_start") returns the browser URL). See the modes overview and multi-user setup.

Tools

Seven tools, each grouping related actions to keep the tool surface small.

`graph` -- Graph lifecycle

Action	Description
`build`	Full or incremental graph build. Set `full_rebuild=true` to re-parse all files; pass `roots` to federate extra repo directories into one graph.
`update`	Alias for `build` with `full_rebuild=false` (incremental).
`stats`	Graph size, languages, node/edge breakdown, embedding count.
`embed`	Compute vector embeddings for semantic search. Dual-mode: local ONNX or cloud chain.
`export`	Export the graph as `graphml` / `json-ld` / `dot` / `cypher`. Inline or to `output_path`.
`summarize`	LLM-generated one-paragraph docstrings for `Function` nodes (via the `SUMMARY_MODELS` chain; no-op when no provider key is set). Cost-capped via `max_nodes`.

`query` -- Graph queries

Action	Description
`query`	Predefined patterns: `callers_of`, `callees_of`, `imports_of`, `importers_of`, `children_of`, `tests_for`, `inheritors_of`, `file_summary`.
`search`	Search code entities by name/keyword or semantic similarity.
`impact`	Blast radius of changed files. Auto-detects from git diff. Paginated with `max_results`.
`large_functions`	Find functions/classes exceeding a line-count threshold.
`spot_check`	Random callsite snippets from the last `callers_of`/`callees_of`/`inheritors_of`/`importers_of` result.
`renamed_in_diff`	Symbols whose callsite line shifted versus a base ref.
`diff`	Nodes added/removed/modified between two commit SHAs (`from_sha`, `to_sha`).

Most read actions accept as_of=<sha> for temporal (point-in-time) snapshots and repo=<repo_id> to scope a federated multi-repo graph.

`review` -- Code review context

Actions: context (default) | delta

Token-optimized review context with structural summary, impacted nodes, source snippets, and review guidance. context auto-detects changed files from the git diff; delta (with from_sha/to_sha, optional show_line_shifts) surfaces refactor moves between two commits.

`config` -- Server configuration and credential setup

Action	Description
`status`	Server info: version, graph path, node/edge counts, embedding backend, embeddings count.
`set`	Update a runtime setting (`key=log_level`).
`cache_clear`	Remove all computed embeddings.
`setup_status`	Show current credential state, providers configured, and setup URL.
`setup_start`	Start relay setup to configure API keys via browser (HTTP mode).
`setup_skip`	Set local mode (skip relay permanently, use ONNX only).
`setup_reset`	Clear credentials and reset state.
`setup_complete`	Re-resolve credentials from environment variables.

`security` -- Security scanning

Actions: scan | report | suppress | rule_list

Action	Description
`scan`	Run a security scan (`engine='heuristic'` default = 5 regex rules, or `'semgrep'`). Findings persist on `nodes.security_tags`.
`report`	Re-emit cached findings as JSON (`format='json'`) or SARIF v2.1.0 (`format='sarif'`).
`suppress`	Suppress a finding by `rule_id` (or `remove=true` to un-suppress).
`rule_list`	List available rules for an engine.

The semgrep engine requires the [security] extra and runs Semgrep's p/auto registry pack plus a 3-rule curated overlay.

`help` -- Full documentation

Returns complete documentation for each tool. Use when the compressed descriptions above are insufficient.

`config__open_relay` -- Re-trigger the relay setup form

Registered automatically from mcp-core. In HTTP mode it returns <PUBLIC_URL>/authorize so the agent can re-open the browser setup form (e.g. after credential expiry); in stdio mode it returns status: 'stdio_unsupported'.

Features

What this fork fixes versus the upstream code-review-graph:

Feature	code-review-graph	better-code-review-graph
Multi-word search	Broken (literal substring)	AND-logic word splitting
callers_of/callees_of	Empty results (bare name targets)	Qualified name resolution + bare fallback
Embedding	sentence-transformers + torch (1.1 GB)	qwen3-embed ONNX + cloud (200 MB), dual-mode
Output size	Unbounded (500K+ chars)	Paginated (max_results, truncated flag)
Tool design	9 individual tools	7 grouped tools: graph + query + review + config + security + help + config__open_relay
Plugin hooks	Invalid PostEdit/PostGit	Valid PostToolUse

Comparison

How better-code-review-graph stacks up against direct competitors in each pillar:

Capability	better-code-review-graph	Greptile	Sourcegraph (Cody / MCP)	CodeGraph (colbymchenry)
Codebase knowledge graph	Yes (Tree-sitter, 14 langs, SQLite)	Yes (functions/classes/deps)	Yes (precise code indexing)	Yes (Tree-sitter, 20+ langs, SQLite)
Persistent incremental updates	Yes (git-diff + file-hash re-parse)	?	Yes (continuous indexing)	Yes (OS file-watcher debounced)
Qualified call resolution (callers/callees)	Yes (same-file bare-call resolution + fallback)	?	Yes (go-to-def / find-references)	Yes (callers / callees / impact)
Semantic search / embeddings	Yes (qwen3 ONNX local + cloud Jina/Gemini/OpenAI/Cohere)	?	Yes (semantic + keyword + regex)	No (FTS5 full-text only)
Token-optimized review context	Yes (`review` tool, git-diff scoped)	Yes (PR review comments)	No (code-context assistant)	No (context layer, not review)
Security scanning	Yes (Semgrep `p/auto` + 3-rule overlay, SARIF)	?	?	No
Self-hostable	Yes (stdio default, machine-bound)	Yes (Docker / K8s / air-gapped)	Yes (self-hosted instance)	Yes (100% local, no API keys)
Free / open source	Yes (MIT)	No (proprietary SaaS; free OSS tier)	No (Enterprise license, source private)	Yes (MIT)

Sources: Greptile · Greptile pricing · Sourcegraph MCP · CodeGraph. Cells marked ? are capabilities the competitor does not publicly document, not confirmed absences.

Security

Graceful fallbacks -- Cloud embedding failure falls back to local ONNX.
Error handling -- Tools return error strings with fix suggestions, never crash.
Read-only mount -- Docker mode mounts the repo as :ro (read-only).
SSRF-guarded endpoints -- Custom EMBEDDING_API_BASE / LLM_API_BASE URLs are validated before any outbound call.

To report a vulnerability, see SECURITY.md.

Build from source

git clone https://github.com/n24q02m/better-code-review-graph
cd better-code-review-graph
uv sync --group dev
uv run pytest
uv run better-code-review-graph

Requirements: Python 3.13, uv.

Trust model

This plugin implements TC-Local (machine-bound, single trust principal). See the mcp-core trust model for full classification.

Mode	Graph DB	Cloud credentials	Who can read your data?
stdio (default)	`<repo>/.code-review-graph/graph.db` (git-ignored)	`~/.better-code-review-graph-mcp/config.json` (AES-GCM, machine-bound key)	Only your OS user
HTTP self-host (multi-user)	Per-user `~/.crg/subs/<sub>/graph.db`	Per-user `~/.crg/subs/<sub>/config.json`	Only the authenticated user

Migration & changelog

The v2.0 release added temporal columns (valid_from_sha / valid_to_sha on every node and edge) plus an opt-in security scanner. The schema migration is auto-applied on first GraphStore open, and a backup of the pre-2.0 DB is written to <graph_db>.pre-2.0.bak. To downgrade and restore it:

CRG_DOWNGRADE_TO_1_X=1 uvx better-code-review-graph

Full schema-change list, behavior changes, and rollback procedure: BREAKING_CHANGES.md. Release-by-release history: CHANGELOG.md.

Documentation

Full docs at mcp.n24q02m.com/servers/better-code-review-graph/setup/:

Setup -- install methods for Claude Code, Codex, Gemini CLI, Cursor, Windsurf, mcp.json
Modes overview -- stdio / local-relay / remote-relay / remote-oauth
Multi-user setup -- per-JWT-sub credential model

Use the help tool from any MCP client for inline per-tool reference.

License

MIT -- See LICENSE.

better-code-review-graph

Better Code Review Graph

v2.0 migration (BREAKING)

Table of contents

Install

Configuration

Model chains

Provider API keys

Advanced

Example -- cloud embeddings + summaries

Tools

`graph` -- Graph lifecycle

`query` -- Graph queries

`review` -- Code review context

`config` -- Server configuration and credential setup

`security` -- Security scanning

`help` -- Full documentation

`config__open_relay` -- Re-trigger the relay setup form

Features

Comparison

Security

Build from source

Trust model

Migration & changelog

Documentation

License

Maintenance

Resources

Tools

Latest Blog Posts

MCP directory API

Better Code Review Graph

v2.0 migration (BREAKING)

Table of contents

Install

Configuration

Model chains

Provider API keys

Advanced

Example -- cloud embeddings + summaries

Tools

graph -- Graph lifecycle

query -- Graph queries

review -- Code review context

config -- Server configuration and credential setup

security -- Security scanning

help -- Full documentation

config__open_relay -- Re-trigger the relay setup form

Features

Comparison

Security

Build from source

Trust model

Migration & changelog

Documentation

License

Maintenance

Resources

Tools

Latest Blog Posts

MCP directory API

`graph` -- Graph lifecycle

`query` -- Graph queries

`review` -- Code review context

`config` -- Server configuration and credential setup

`security` -- Security scanning

`help` -- Full documentation

`config__open_relay` -- Re-trigger the relay setup form