@cyanheads/git-mcp-server
A Git MCP server for AI agents. STDIO & Streamable HTTP.
28 Tools · 1 Resource · 1 Prompt
28 git operations organized into seven categories:
| Category | Tools | Description |
|---|
| Repository Management | git_init, git_clone, git_status, git_clean | Initialize repos, clone from remotes, check status, clean untracked files |
| Staging & Commits | git_add, git_commit, git_diff | Stage changes, create commits, compare changes |
| History & Inspection | git_log, git_show, git_blame, git_reflog | View commit history, inspect objects, trace authorship, view ref logs |
| Analysis | git_changelog_analyze | Gather git context and instructions for LLM-driven changelog analysis |
| Branching & Merging | git_branch, git_checkout, git_merge, git_rebase, git_cherry_pick | Manage branches, switch contexts, integrate changes, apply specific commits |
| Remote Operations | git_remote, git_fetch, git_pull, git_push | Configure remotes, fetch updates, synchronize repositories, publish changes |
| Advanced Workflows | git_tag, git_stash, git_reset, git_worktree, git_set_working_dir, git_clear_working_dir, git_wrapup_instructions | Tag releases (list/create/delete/verify), stash changes, reset state, manage worktrees, set/clear session directory |
Resources
| Resource | URI | Description |
|---|
| Git Working Directory | git://working-directory | The current session working directory, set via git_set_working_dir. |
Prompts
| Prompt | Description | Parameters |
|---|
| Git Wrap-up | Workflow protocol for completing git sessions: review, document, commit, and tag changes. | changelogPath, createTag. |
Getting started
Runtime
Works with both Bun and Node.js. Runtime is auto-detected.
| Runtime | Command | Minimum Version |
|---|
| Node.js | npx @cyanheads/git-mcp-server@latest | >= 20.0.0 |
| Bun | bunx @cyanheads/git-mcp-server@latest | >= 1.2.0 |
MCP client configuration
Add the following to your MCP client config (e.g., cline_mcp_settings.json). Update the environment variables to match your setup — especially the git identity fields.
{
"mcpServers": {
"git-mcp-server": {
"type": "stdio",
"command": "npx",
"args": ["@cyanheads/git-mcp-server@latest"],
"env": {
"MCP_TRANSPORT_TYPE": "stdio",
"MCP_LOG_LEVEL": "info",
"GIT_BASE_DIR": "~/Developer/",
"LOGS_DIR": "~/Developer/logs/git-mcp-server/",
"GIT_USERNAME": "cyanheads",
"GIT_EMAIL": "casey@caseyjhand.com",
"GIT_SIGN_COMMITS": "true"
}
}
}
}
Bun users: replace "command": "npx" with "command": "bunx".
For Streamable HTTP, set MCP_TRANSPORT_TYPE=http and MCP_HTTP_PORT=3015.
Features
Built on mcp-ts-template.
| Feature | Details |
|---|
| Declarative tools | Define capabilities in single, self-contained files. The framework handles registration, validation, and execution. |
| Error handling | Unified McpError system for consistent, structured error responses. |
| Authentication | Supports none, jwt, and oauth modes. |
| Pluggable storage | Swap backends (in-memory, filesystem, Supabase, Cloudflare KV/R2) without changing business logic. |
| Observability | Structured logging (Pino) and optional auto-instrumented OpenTelemetry for traces and metrics. |
| Dependency injection | Built with tsyringe for decoupled, testable architecture. |
| Cross-runtime | Auto-detects Bun or Node.js and uses the appropriate process spawning method. |
| Provider architecture | Pluggable git provider system. Current: CLI. Planned: isomorphic-git for edge deployment. |
| Working directory management | Session-specific directory context for multi-repo workflows. |
| Configurable git identity | Override author/committer info via environment variables, with fallback to global git config. |
| Commit signing | GPG/SSH signing (enabled by default) for commits, merges, rebases, cherry-picks, and tags. Silent fallback to unsigned on failure with signed/signingWarning fields in responses. |
| Safety | Destructive operations (git clean, git reset --hard) require explicit confirmation flags. |
Security
- All file paths are validated and sanitized to prevent directory traversal.
- Optional
GIT_BASE_DIR restricts operations to a specific directory tree for multi-tenant sandboxing.
- Git commands use validated arguments via process spawning — no shell interpolation.
- JWT and OAuth support for authenticated deployments.
- Optional rate limiting via the DI-managed
RateLimiter service.
- All operations are logged with request context for auditing.
Configuration
All configuration is validated at startup in src/config/index.ts. Key environment variables:
| Variable | Description | Default |
|---|
MCP_TRANSPORT_TYPE | Transport: stdio or http. | stdio |
MCP_SESSION_MODE | HTTP session mode: stateless, stateful, or auto. | auto |
MCP_RESPONSE_FORMAT | Response format: json (LLM-optimized), markdown (human-readable), or auto. | json |
MCP_RESPONSE_VERBOSITY | Detail level: minimal, standard, or full. | standard |
MCP_HTTP_PORT | HTTP server port. | 3015 |
MCP_HTTP_HOST | HTTP server hostname. | 127.0.0.1 |
MCP_HTTP_ENDPOINT_PATH | MCP request endpoint path. | /mcp |
MCP_AUTH_MODE | Authentication mode: none, jwt, or oauth. | none |
STORAGE_PROVIDER_TYPE | Storage backend: in-memory, filesystem, supabase, cloudflare-kv, r2. | in-memory |
OTEL_ENABLED | Enable OpenTelemetry. | false |
MCP_LOG_LEVEL | Minimum log level: debug, info, warn, error. | info |
GIT_SIGN_COMMITS | GPG/SSH signing for commits, merges, rebases, cherry-picks, and tags. Falls back to unsigned on failure (see response signed/signingWarning). | true |
GIT_AUTHOR_NAME | Git author name. Aliases: GIT_USERNAME, GIT_USER. Falls back to global git config. | (none) |
GIT_AUTHOR_EMAIL | Git author email. Aliases: GIT_EMAIL, GIT_USER_EMAIL. Falls back to global git config. | (none) |
GIT_BASE_DIR | Absolute path to restrict all git operations to a specific directory tree. | (none) |
GIT_WRAPUP_INSTRUCTIONS_PATH | Path to custom markdown file with workflow instructions. | (none) |
MCP_AUTH_SECRET_KEY | Required for jwt auth. 32+ character secret key. | (none) |
OAUTH_ISSUER_URL | Required for oauth auth. OIDC provider URL. | (none) |
Running the server
Via package manager (no install)
npx @cyanheads/git-mcp-server@latest
Configure through environment variables or your MCP client config.
Local development
npm run rebuild
npm run start:stdio
npm run dev:stdio
npm run devcheck
npm test
Cloudflare Workers
npm run build:worker
npm run deploy:dev
npm run deploy:prod
Project structure
| Directory | Purpose |
|---|
src/mcp-server/tools | Tool definitions (*.tool.ts). Git capabilities live here. |
src/mcp-server/resources | Resource definitions (*.resource.ts). Git context data sources. |
src/mcp-server/transports | HTTP and STDIO transport implementations, including auth. |
src/storage | StorageService abstraction and provider implementations. |
src/services | Git service provider (CLI-based git operations). |
src/container | DI container registrations and tokens. |
src/utils | Logging, error handling, performance, security utilities. |
src/config | Environment variable parsing and validation (Zod). |
tests/ | Unit and integration tests, mirroring src/ structure. |
Configure output format and verbosity via MCP_RESPONSE_FORMAT and MCP_RESPONSE_VERBOSITY.
JSON format (default, optimized for LLM consumption):
{
"success": true,
"branch": "main",
"staged": ["src/index.ts", "README.md"],
"unstaged": ["package.json"],
"untracked": []
}
Markdown format (human-readable):
# Git Status: main
## Staged (2)
- src/index.ts
- README.md
## Unstaged (1)
- package.json
The LLM always receives the complete structured data via responseFormatter — full file lists, metadata, timestamps — regardless of what the client displays. Verbosity controls how much detail is included: minimal (core fields only), standard (balanced), or full (everything).
Development guide
See AGENTS.md for architecture, tool development patterns, and contribution rules.
Testing
Tests use Bun's test runner with Vitest compatibility.
bun test
bun test --coverage
bun run devcheck
Roadmap
The server uses a provider-based architecture for git operations:
- CLI provider (current) — Full 28-tool coverage via native git CLI. Requires local git installation.
- Isomorphic git provider (planned) — Pure JS implementation for edge deployment (Cloudflare Workers, Vercel Edge, Deno Deploy). Uses isomorphic-git.
- GitHub API provider (maybe) — Cloud-native operations via GitHub REST/GraphQL APIs, no local repo required.
Contributing
Issues and pull requests are welcome. Run checks before submitting:
npm run devcheck
npm test
License
Apache 2.0. See LICENSE.
