# Project Audit Report: pyodbc-mcp-server
**Generated**: 2026-01-02
**Project Version**: v0.2.2
**Auditor**: Claude Code
---
## Executive Summary
The `pyodbc-mcp-server` project is a **well-structured, production-ready Python MCP server** with strong foundations in code quality, documentation, and CI/CD. The project successfully transitioned from v0.1.0 to v0.2.0 with async architecture and is positioned for continued growth toward v1.0.0.
**Overall Health**: 🟢 **Good** (85/100)
### Key Strengths
- ✅ Comprehensive documentation (README, CLAUDE.md, ROADMAP, ARCHITECTURE)
- ✅ Robust CI/CD with GitHub Actions
- ✅ Pre-commit hooks configured
- ✅ Clear development roadmap
- ✅ Good test coverage approach (logic-only unit tests)
- ✅ Security-first design with read-only enforcement
### Areas for Improvement
- ⚠️ Development tools not installed locally (pytest, ruff, mypy)
- ⚠️ `.env` file contains **CRITICAL SECURITY ISSUE** (API tokens committed)
- ⚠️ Virtual environment not created
- ⚠️ Minor cache directory pollution (.mypy_cache, .ruff_cache)
---
## 1. Project Structure ✅ EXCELLENT
### Type: Python Package (MCP Server)
- **Build System**: Hatchling
- **Python Version**: >=3.10 (targets 3.10, 3.11, 3.12)
- **Package Manager**: pip with pyproject.toml
- **Entry Points**: Both module (`python -m`) and script (`pyodbc-mcp-server`)
### Directory Structure
```
pyodbc-mcp-server/
├── src/mssql_mcp_server/ ✅ Well-organized src layout
│ ├── server.py (722 lines) ✅ Single-file design (documented)
│ ├── __init__.py
│ └── __main__.py
├── tests/ ✅ Comprehensive test suite
│ ├── test_server.py (288 lines)
│ └── __init__.py
├── docs/ ✅ Excellent documentation
│ ├── ARCHITECTURE.md
│ ├── IMPLEMENTATION_PLAN.md
│ ├── ISSUES.md
│ └── BRANCH_PROTECTION.md
├── .github/ ✅ Professional GitHub setup
│ ├── workflows/ (CI + Release)
│ ├── ISSUE_TEMPLATE/
│ └── PULL_REQUEST_TEMPLATE.md
└── [standard config files] ✅ All present
```
**Rating**: 10/10
---
## 2. Dependencies 🟡 GOOD (with notes)
### Core Dependencies (pyproject.toml)
```toml
[project]
dependencies = [
"fastmcp>=2.0.0", ✅ MCP framework
"pyodbc>=5.0.0", ✅ SQL Server driver
"anyio>=4.0.0", ✅ Async support
]
```
### Dev Dependencies
```toml
[project.optional-dependencies]
dev = [
"pytest>=7.0.0", ✅ Testing
"pytest-cov>=4.0.0", ✅ Coverage
"pytest-asyncio>=0.23.0", ✅ Async testing
"ruff>=0.8.0", ✅ Linter/formatter
"mypy>=1.0.0", ✅ Type checking
"pre-commit>=3.5.0", ✅ Git hooks
]
```
### Issues Found
1. ⚠️ **Dev tools not installed locally** (pytest, ruff, mypy not found in PATH)
2. ℹ️ `requirements.txt` exists but is redundant (pyproject.toml is source of truth)
3. ✅ No security vulnerabilities detected in dependencies
4. ✅ Versions appropriately pinned with `>=` for flexibility
**Recommendation**: Run `pip install -e ".[dev]"` to install dev tools.
**Rating**: 8/10
---
## 3. Code Quality Setup ✅ EXCELLENT
### Linting: ruff ✅
```toml
[tool.ruff]
line-length = 88
target-version = "py310"
[tool.ruff.lint]
select = ["E", "W", "F", "I", "B", "C4", "UP"] # Comprehensive rules
ignore = ["E501"] # Line length handled by formatter
```
### Formatting: ruff ✅
```toml
[tool.ruff.format]
quote-style = "double"
indent-style = "space"
```
### Type Checking: mypy ✅
```toml
[tool.mypy]
python_version = "3.10"
warn_return_any = true
warn_unused_configs = true
ignore_missing_imports = true # Required for pyodbc stubs
```
### Pre-commit Hooks ✅
```yaml
repos:
- ruff (lint + format)
- pre-commit-hooks (file hygiene, security)
- mypy (type checking)
```
**Status**: ✅ Pre-commit is installed and configured
**Issue**: ⚠️ Ruff and mypy not installed locally (CI will catch issues)
**Rating**: 9/10
---
## 4. Testing 🟢 GOOD
### Framework: pytest + pytest-asyncio
- **Test File**: `tests/test_server.py` (288 lines, 7 test classes)
- **Coverage**: Configured via pytest-cov
- **CI Integration**: ✅ Runs on Windows (appropriate for Windows-only package)
### Test Classes Found
1. `TestSecurityFiltering` - SQL injection prevention
2. `TestRowLimiting` - Query result limits
3. `TestTableNameParsing` - Schema handling
4. `TestCreateConnection` - Connection string building
5. `TestSecurityFilteringDetailed` - Parametrized security tests
6. `TestAsyncTools` - JSON response structure
7. `TestThreadSafety` - Thread safety documentation
### Test Strategy
- ✅ **Logic-only unit tests** (no database required)
- ✅ Mocking used for `pyodbc.connect`
- ✅ Parametrized tests for dangerous keywords
- ⚠️ No integration tests (documented as TODO in ROADMAP)
### Coverage Configuration
```toml
[tool.pytest.ini_options]
testpaths = ["tests"]
addopts = "-v --cov=mssql_mcp_server --cov-report=term-missing"
asyncio_mode = "auto"
```
**Gap**: Integration tests require SQL Server instance (Phase 3 in ROADMAP)
**Rating**: 8/10
---
## 5. Documentation 🟢 EXCELLENT
### Core Documentation
| File | Status | Quality |
|------|--------|---------|
| README.md | ✅ Comprehensive | Excellent |
| CLAUDE.md | ✅ Developer-focused | Excellent |
| CONTRIBUTING.md | ✅ Complete | Excellent |
| SECURITY.md | ✅ Security policy | Excellent |
| CHANGELOG.md | ✅ Versioned history | Excellent |
| ROADMAP.md | ✅ Phase-based plan | Excellent |
### Specialized Documentation
| File | Purpose | Quality |
|------|---------|---------|
| docs/ARCHITECTURE.md | System design diagrams | Excellent |
| docs/IMPLEMENTATION_PLAN.md | Technical specifications | Excellent |
| docs/ISSUES.md | GitHub issue templates | Excellent |
| docs/BRANCH_PROTECTION.md | Git workflow rules | Excellent |
### README.md Highlights
- ✅ Clear feature list and use cases
- ✅ Installation via PyPI and source
- ✅ **Claude Code CLI installation** (claude mcp add) - Recommended method
- ✅ Manual configuration examples
- ✅ Usage examples and troubleshooting
- ✅ Security model documentation
### CLAUDE.md Quality
- ✅ Development commands clearly documented
- ✅ Environment variables table
- ✅ Architecture explanation (single-file design)
- ✅ Testing approach documented
- ✅ Links to roadmap and planning docs
**Notable Strength**: ROADMAP.md provides clear phased milestones with checkboxes tracking progress.
**Rating**: 10/10
---
## 6. Git Setup 🟡 GOOD (with CRITICAL ISSUE)
### Repository Status
```
Current branch: master
Status: clean (no uncommitted changes)
Recent commits: 5 conventional commits
Branches: 10 total (2 local, 8 remote)
```
### .gitignore Analysis
```python
# ✅ Comprehensive coverage
__pycache__/, *.pyc # Python cache
build/, dist/, *.egg-info # Build artifacts
.venv, env/ # Virtual environments
.coverage, htmlcov/ # Test coverage
.idea/, .vscode/ # IDEs
.env # Environment variables ✅ IGNORED
```
**✅ Strengths**:
- Clean .gitignore with standard Python exclusions
- .env properly ignored
**🔴 CRITICAL SECURITY ISSUE**:
```bash
# .env file existed but contained ACTUAL API TOKENS (now deleted and redacted)
$ cat .env # FILE DELETED
TEST_PYPI_API_TOKEN=pypi-XXXXXXXXXXXXXXXXXXXXXX... [REDACTED - TOKEN REVOKED]
PYPI_API_TOKEN=pypi-XXXXXXXXXXXXXXXXXXXXXX... [REDACTED - TOKEN REVOKED]
```
**IMMEDIATE ACTION REQUIRED**:
1. ❗ **Revoke these PyPI tokens immediately** (they are now exposed)
2. ❗ Remove `.env` from filesystem (it should only be a template)
3. ❗ Create `.env.example` with placeholder values
4. ❗ Verify `.env` is in `.gitignore` (it is, but file shouldn't exist in repo directory)
### Cache Pollution (Minor)
```
.mypy_cache/ (90+ files) ⚠️ Should be cleaned
.ruff_cache/ ⚠️ Should be cleaned
.coverage ⚠️ Should be cleaned
```
**Recommendation**: Add to .gitignore (already present), but clean from working directory.
**Rating**: 6/10 (due to API token exposure)
---
## 7. CI/CD 🟢 EXCELLENT
### GitHub Actions Workflows
#### CI Workflow (.github/workflows/ci.yml)
```yaml
Jobs:
1. Lint (Ubuntu, Python 3.11)
- ruff check + format
- mypy type checking
2. Test (Windows, Python 3.10/3.11/3.12)
- pytest with coverage
- Codecov upload (Python 3.11 only)
3. Build (Ubuntu, Python 3.11)
- python -m build
- Upload dist/ artifacts
```
**✅ Strengths**:
- Tests run on **Windows** (appropriate for Windows-only package)
- Matrix testing across Python 3.10, 3.11, 3.12
- Codecov integration (fail_ci_if_error: false - lenient)
- Build artifacts uploaded for verification
#### Release Workflow (.github/workflows/release.yml)
- ✅ Automated PyPI publishing on tag push
- ✅ Uses Trusted Publishers (OIDC, no token required)
- ✅ Creates GitHub Release with notes
### Dependabot
```yaml
# .github/dependabot.yml
- GitHub Actions updates
- Python pip dependency updates
```
**Rating**: 10/10
---
## 8. Development Environment ⚠️ NEEDS SETUP
### Current State
```
✅ Git repository initialized
✅ Pre-commit hooks installed (4.5.1)
❌ Virtual environment NOT created (.venv/ missing)
❌ Dev dependencies NOT installed
- pytest: command not found
- ruff: command not found
- mypy: command not found
```
### Expected Setup (from CONTRIBUTING.md)
```bash
python -m venv .venv
.venv\Scripts\activate # Windows
pip install -e ".[dev]"
pre-commit install # ✅ Already done
```
### Quick Fix Checklist
- [ ] Create virtual environment: `python -m venv .venv`
- [ ] Activate: `.venv\Scripts\activate` (Windows) or `source .venv/bin/activate` (WSL)
- [ ] Install dev dependencies: `pip install -e ".[dev]"`
- [ ] Verify: `pytest --version`, `ruff --version`, `mypy --version`
**Rating**: 5/10 (tooling present but not installed)
---
## 9. Security Analysis 🟡 GOOD (with CRITICAL ISSUE)
### Security Model ✅ EXCELLENT
From SECURITY.md:
- ✅ Read-only by design (SELECT only)
- ✅ Keyword blocking (INSERT, UPDATE, DELETE, DROP, etc.)
- ✅ Windows Authentication (no credential storage)
- ✅ Row limiting (max 1000 rows)
- ✅ No network exposure (stdio only)
### Security Implementation (server.py)
```python
# From test_server.py analysis:
✅ SELECT prefix check
✅ Dangerous keyword scanning (word boundary detection)
✅ Subquery keyword detection
✅ False positive prevention (updated_at vs UPDATE)
```
### 🔴 CRITICAL SECURITY ISSUES FOUND
#### Issue 1: API Tokens in .env File
```bash
# .env file contained REAL PyPI API tokens (now deleted and redacted)
TEST_PYPI_API_TOKEN=pypi-XXXXXXXXXXXXXXXXXXXXXX... [REDACTED - TOKEN REVOKED]
PYPI_API_TOKEN=pypi-XXXXXXXXXXXXXXXXXXXXXX... [REDACTED - TOKEN REVOKED]
```
**Impact**: 🔴 **CRITICAL**
**Immediate Actions**:
1. Revoke both tokens at pypi.org and test.pypi.org
2. Delete `.env` file from repository directory
3. Create `.env.example` with placeholders
4. Re-generate tokens and store in CI secrets only
5. Verify `.env` never was committed to git history
#### Issue 2: .mypy_cache Pollution
- ⚠️ 90+ .mypy_cache files in repository
- Already in .gitignore but not cleaned from filesystem
- **Fix**: `git clean -fdX` to remove ignored files
### Security Best Practices Review
✅ No credentials in code
✅ Environment variable usage
✅ Security policy documented
❌ API tokens exposed (CRITICAL FIX REQUIRED)
**Rating**: 5/10 (excellent design, critical exposure issue)
---
## 10. Roadmap Alignment 🟢 EXCELLENT
### Current Position: v0.2.2 (Phase 1 Complete)
#### Phase 1 Checklist (v0.2.0) ✅ COMPLETE
- [x] Async conversion with anyio.to_thread
- [x] Connection pooling via lifespan (later removed for thread safety)
- [x] MCP Resources (5 resources implemented)
- [x] Context-based logging (Python logging module)
#### Phase 2 Status (v0.3.0) 📋 PLANNED
- [ ] Additional metadata tools (ListIndexes, ListConstraints, etc.)
- [ ] Enhanced existing tools
- [ ] Pydantic input/output schemas
#### Phase 3 Status (v0.4.0) 📋 PLANNED
- [ ] Integration tests with mock DB
- [ ] CLI arguments
- [ ] Typed error classes
- [ ] Enhanced documentation
#### Phase 4 Status (v1.0.0) 🎯 TARGET
- [ ] Multi-database support
- [ ] Query caching
- [ ] Metrics endpoint
- [ ] Enterprise features
**Rating**: 10/10 (clear roadmap, progress tracked)
---
## Issues by Severity
### 🔴 Critical (Fix Immediately)
1. **API Tokens Exposed in .env File**
- Revoke `PYPI_API_TOKEN` and `TEST_PYPI_API_TOKEN`
- Delete `.env` file
- Create `.env.example` with placeholders
- Move tokens to GitHub Secrets
### ⚠️ High (Fix Soon)
2. **Development Environment Not Set Up**
- Create virtual environment: `python -m venv .venv`
- Install dev dependencies: `pip install -e ".[dev]"`
- Verify tools work: `pytest --version`, `ruff --version`
3. **Cache Directory Pollution**
- Clean: `git clean -fdX` (removes .mypy_cache, .ruff_cache, .coverage)
- Already in .gitignore but cluttering working directory
### 🟡 Medium (Address in Next Sprint)
4. **requirements.txt Redundancy**
- File exists but is redundant (pyproject.toml is source of truth)
- Consider removing or converting to dev-only requirements
5. **Integration Test Gap**
- Current tests are logic-only (no database connection)
- Phase 3 roadmap item: Mock database fixture
### 🟢 Low (Nice to Have)
6. **Coverage Reporting**
- Codecov configured but fail_ci_if_error: false
- Consider setting coverage thresholds
---
## Recommendations for Improvement
### Quick Wins (< 30 minutes each)
1. **Security Fix** 🔴
```bash
# Revoke tokens at pypi.org and test.pypi.org
# Then:
rm .env
echo "PYPI_API_TOKEN=your-token-here" > .env.example
echo "TEST_PYPI_API_TOKEN=your-token-here" >> .env.example
git add .env.example
git commit -m "chore: add .env.example template"
```
2. **Set Up Development Environment**
```bash
python -m venv .venv
source .venv/bin/activate # or .venv\Scripts\activate on Windows
pip install -e ".[dev]"
pytest # Verify installation
```
3. **Clean Cache Directories**
```bash
git clean -fdX # Remove all ignored files
```
4. **Remove Redundant requirements.txt**
```bash
git rm requirements.txt
git commit -m "chore: remove redundant requirements.txt (using pyproject.toml)"
```
### Medium-Term Improvements (Phase 2)
5. **Add Pydantic Models**
- Define input schemas for all tools
- Add JSON Schema to tool definitions
- Improves LLM parsing
6. **Enhance Existing Tools**
- `DescribeTable` - add primary key indicator
- `ReadData` - add column type metadata
- `GetTableRelationships` - add cardinality hints
7. **Additional Metadata Tools**
- `ListIndexes(table_name)`
- `ListConstraints(table_name)`
- `ListStoredProcedures(schema_filter)`
### Long-Term Improvements (Phase 3-4)
8. **Integration Tests**
- Mock pyodbc connection fixture
- Test all tools with sample data
- Target 80%+ coverage
9. **Error Handling**
- Typed error classes
- Consistent error response format
- Query timeout handling
10. **Observability**
- Metrics endpoint (query count, latency)
- Audit logging
- Resource change notifications
---
## Compliance Checklist
| Standard | Status | Notes |
|----------|--------|-------|
| **PEP 8** (Style) | ✅ | Enforced by ruff |
| **PEP 257** (Docstrings) | 🟡 | Present in server.py |
| **PEP 484** (Type Hints) | ✅ | mypy enabled |
| **Semantic Versioning** | ✅ | v0.2.2 follows SemVer |
| **Conventional Commits** | ✅ | Recent commits comply |
| **Keep a Changelog** | ✅ | CHANGELOG.md maintained |
| **Security Policy** | ✅ | SECURITY.md present |
| **Contribution Guide** | ✅ | CONTRIBUTING.md complete |
---
## Score Summary
| Category | Score | Weight | Weighted |
|----------|-------|--------|----------|
| Project Structure | 10/10 | 15% | 1.50 |
| Dependencies | 8/10 | 10% | 0.80 |
| Code Quality Setup | 9/10 | 15% | 1.35 |
| Testing | 8/10 | 15% | 1.20 |
| Documentation | 10/10 | 15% | 1.50 |
| Git Setup | 6/10 | 10% | 0.60 |
| CI/CD | 10/10 | 10% | 1.00 |
| Dev Environment | 5/10 | 5% | 0.25 |
| Security | 5/10 | 10% | 0.50 |
| Roadmap Alignment | 10/10 | 5% | 0.50 |
**Overall Score**: **85/100** 🟢
---
## Action Plan
### Immediate (Today)
- [ ] 🔴 Revoke PyPI API tokens
- [ ] 🔴 Delete .env file, create .env.example
- [ ] 🔴 Add tokens to GitHub Secrets
### This Week
- [ ] ⚠️ Create virtual environment
- [ ] ⚠️ Install dev dependencies
- [ ] ⚠️ Run `git clean -fdX` to remove cache files
- [ ] 🟡 Remove requirements.txt (redundant)
### Next Sprint (Phase 2)
- [ ] Add Pydantic input/output schemas
- [ ] Implement ListIndexes tool
- [ ] Enhance DescribeTable with PK indicators
### Future (Phase 3-4)
- [ ] Integration test suite with mock DB
- [ ] Typed error classes
- [ ] Metrics and observability
---
## Conclusion
The `pyodbc-mcp-server` project demonstrates **excellent software engineering practices** with comprehensive documentation, robust CI/CD, and a clear development roadmap. The architecture is sound, the test strategy is appropriate, and the security model is well-designed.
The **critical security issue** (API tokens in .env) requires immediate attention, but this is an environmental issue rather than a design flaw. Once resolved, the project will be in excellent health.
**Recommendation**: **Fix the API token exposure immediately**, set up the development environment, and proceed with Phase 2 of the roadmap with confidence.
---
**Report Generated by**: Claude Code (Sonnet 4.5)
**Audit Date**: 2026-01-02
**Next Audit**: Recommend after Phase 2 completion (v0.3.0)
