mbta-mcp

The server uses `aiohttp` for network requests with proper async context management and includes retry logic (`tenacity`) for robustness. API keys are sourced from environment variables (`MBTA_API_KEY`), avoiding hardcoding. It integrates with external third-party APIs (IMT, Boston Amtrak Tracker) which introduces reliance on their security and availability, though this is a common pattern for data aggregation. No 'eval' or obvious malicious code patterns were found. Code quality tools like `ruff` and `mypy` are used, indicating a focus on maintainability and correctness which can indirectly enhance security.