# instagit [Health: Active]

**Category:** 🔄 Version Control  
**Repository:** https://github.com/InstalabsAI/instagit  
**GitHub Stars:** 20  
**npm Downloads (last month):** 141  
**Views:** 1  
**Installs:** 0  
**Upvotes:** 0  
**Directory Page:** https://allmcps.com/mcp/instagit

## Description
MCP server for Instagit — AI-powered Git repository analysis for coding agents

## Tools
Capabilities this server exposes over MCP:

- **ask_repo** — Analyze any Git repository with AI. Point it at a repo and ask questions about the codebase.

Example prompts by use case:

Understanding Architecture:
- repo: "nginx/nginx", prompt: "How does nginx handle concurrent connections? Walk through the event loop, worker process model, and connection state transitions."

Integration and API Usage:
- repo: "hashicorp/terraform", prompt: "How do I implement a custom provider? What interfaces does the SDK expose, how are CRUD operations mapped to the resource lifecycle?"

Debugging and Troubleshooting:
- repo: "docker/compose", prompt: "How does Compose resolve service dependencies and startup order? What happens with depends_on and health check conditions?"

Security Review:
- repo: "redis/redis", prompt: "Review the ACL security model. How are per-user command permissions enforced, and how does AUTH prevent privilege escalation?"

Code Quality and Evaluation:
- repo: "vitejs/vite", prompt: "How does Vite's plugin system compare to Rollup's? What are the Vite-specific hooks and tradeoffs?"

Deep Technical Analysis:
- repo: "ggml-org/llama.cpp", prompt: "How does the KV cache work during autoregressive generation? How are past key-value pairs stored, reused, and evicted?"

Migration Planning (with ref — Pro/Max plans only):
- repo: "mui/material-ui", ref: "v4.12.0", prompt: "Document the Button component's full API surface — every prop, its type, default value, and behavior."
- repo: "mui/material-ui", ref: "v5.0.0", prompt: "Document the Button component's full API surface — every prop, its type, default value, and behavior."
  (Compare both results to build a migration guide between v4 and v5)
- repo: "kubernetes/kubernetes", ref: "release-1.29", prompt: "How does the scheduler's scoring and filtering pipeline work for pod placement?"

Ask detailed, specific questions — the tool returns real function signatures, parameter types, return values, and source citations with exact file paths and line numbers.

If you hit a rate limit (429), the user's monthly token credits are exhausted — they can wait for the reset or upgrade their plan. Free-tier repos larger than 2 GB will be rejected with a 413 error; suggest upgrading to Pro or Max for unlimited repo size.

## Claude Desktop Quick Installation
Install path detected from listing signals. Uses `npx` (confidence: high):

```json
"mcpServers": {
  "instagit": {
    "command": "npx",
    "args": ["-y","instagit@latest"],
    "env": {
      "INSTAGIT_API_KEY": "",
      "INSTAGIT_API_URL": ""
    }
  }
}
```

**Requires environment variables:** `INSTAGIT_API_KEY`, `INSTAGIT_API_URL` — the values above are empty placeholders; fill in real credentials before running (see the repository for what each one is for).

## Documentation

## What the instagit MCP server does

The instagit MCP server gives coding agents a way to ask questions about a Git repository and receive analysis grounded in its source. It is intended for situations where documentation may be incomplete, stale, or insufficient for understanding how a project actually works.

An agent can use repository analysis to inspect architecture, understand component relationships, review authentication code, trace problems across a dependency boundary, or identify the work involved in a version upgrade. It can also use the repository’s implementation to produce integration guidance based on actual constructors, configuration options, methods, parameters, return values, and error behavior.

The service supports public and private repositories, repositories hosted on any Git host, and projects ranging from small codebases to monorepos. Responses include references to relevant files and line numbers, allowing a developer to check the underlying source.

## How it works

The MCP tool is named `ask_repo`. Each request supplies a `repo` value and a `prompt`. The repository can be represented by a full URL, an `owner/repo` shorthand, or another public Git URL. An optional `ref` selects a branch, tag, or commit SHA; when omitted, analysis uses the repository’s default branch.

The server passes the request to Instagit’s analysis service and returns an answer for the coding agent to use. Example questions include explaining the main architecture, reviewing an authentication implementation for security concerns, finding the established pattern for adding an API endpoint, or assessing an upgrade between framework versions.

## Setup and configuration

Node.js 18 or newer is required. A manual MCP configuration can launch the package with `npx`:

```json
{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}
```

The `@latest` package tag is used in the documented configuration. Instagit can also provide installation instructions through `https://instagit.com/install.md` for an agent-assisted setup.

Authentication is optional for initial use. Without `INSTAGIT_API_KEY`, the server registers an anonymous token on first use and stores it at `~/.instagit/token.json`. An API key from Instagit can be supplied for authenticated use, including higher rate limits and faster analysis. `INSTAGIT_API_URL` can replace the production API endpoint when a custom endpoint is needed.

## Tools and capabilities

The instagit MCP server exposes one documented tool:

- `ask_repo`: asks an AI analysis question about a selected Git repository.
- `repo`: accepts a repository URL, shorthand, or public Git URL.
- `prompt`: specifies the codebase question or analysis task.
- `ref`: optionally selects a branch, tag, or commit SHA.

The tool is suitable for repository onboarding, comparing implementations, planning migrations, checking how existing patterns should be followed, and investigating behavior that spans an application and one of its dependencies. Its answers are designed to cite the source locations supporting the analysis rather than relying only on keyword matches or general explanations.

## Limitations and notes

Repository analysis still depends on the selected source and reference being available to the service. Anonymous access has different limits from authenticated use, while signing up at Instagit provides higher rate limits and faster analysis.

The package requires Node.js 18 or later.

_Full upstream README: https://allmcps.com/mcp/instagit/readme_