dev-mcp

dev-mcp

A local MCP server that gives AI agents access to developer tooling — GitHub (read-only), documentation search, and web research — via stdio transport.

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dev-mcp

A local MCP (Model Context Protocol) server that gives AI agents access to developer tooling — GitHub (read-only), documentation search, and web research — via stdio transport.

Built with Bun, TypeScript, the MCP SDK, and Zod.

Features

GitHub (read-only)

Tool Description
github.repo_search Search repositories by query
github.repo_read Get repository details
github.file_read Read a file from a repository
github.issues_list List issues with state/label filters
github.issue_get Get a single issue
github.prs_list List pull requests
github.pr_diff Get the diff of a pull request
github.commit_search Search commits by message or author

Context7 Documentation Search

Tool Description
context7.docs_search Search library documentation
context7.docs_get Get specific documentation page
context7.examples_get Get code examples
context7.api_lookup Look up API symbol documentation

Exa Web Research

Tool Description
exa.web_search Search the web
exa.web_fetch Fetch and convert a URL to markdown/text
exa.code_search Search code across GitHub
exa.research_brief Generate a research brief by synthesizing top results

Total: 16 tools

Prerequisites

Quick Start

# Install dependencies
bun install

# Create your environment file
cp .env.example .env
# Edit .env and set GITHUB_TOKEN

# Run typecheck
bun run typecheck

# Start the server
bun start

The server listens on stdio, ready to receive MCP JSON-RPC messages.

Configuration

All configuration is via environment variables:

Variable Required Default Description
GITHUB_TOKEN Yes — GitHub PAT (read-only access)
CONTEXT7_API_KEY No — Context7 API key
EXA_API_KEY No — Exa API key
SENTRY_DSN No — Sentry DSN for error reporting
SENTRY_ENVIRONMENT No development Sentry environment tag
LOG_LEVEL No info Log level (debug, info, warn, error)
NODE_ENV No development Runtime environment

Architecture

src/
├── config/        # Environment validation (Zod schema)
├── core/          # MCP server, tool registry, transport
├── observability/ # Logger, Sentry integration
├── schemas/       # Zod schemas for all tool inputs
├── security/      # Input validation wrapper
├── tools/
│   ├── context7/  # Documentation search tools
│   ├── exa/       # Web search & research tools
│   └── github/    # GitHub API tools
└── utils/         # Error hierarchy (McpError)

Development

bun run typecheck    # Type-check all files
bun start            # Start the server (stdio)

The project uses Husky for pre-commit hooks and Turbo for task orchestration. A typecheck hook runs automatically before each commit.

License

MIT — see LICENSE.

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