MCP Servers · modelcontextprotocol

servers

A collection of reference implementations for the Model Context Protocol (MCP), showcasing how LLMs can securely access tools and data sources. The repository contains 7 active reference servers (filesystem, git, memory, fetch, time, sequential thinking, everything) maintained by the MCP steering group, with many more community-built servers available through the MCP Registry.

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Source: GitHub — github.com/modelcontextprotocol/servers

88.2k

GitHub stars

11.2k

Forks

TypeScript

Primary language

Other

License (Requires review (not clearly OSI))

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	modelcontextprotocol/servers
Owner	modelcontextprotocol
Primary language	TypeScript
License	Other — Requires review (not clearly OSI)
Stars	88.2k
Forks	11.2k
Open issues	644
Latest release	2026.7.4 (2026-07-04)
Last updated	2026-07-06
Source	https://github.com/modelcontextprotocol/servers

What servers is

MCP reference servers built with TypeScript, Python, and other SDKs that implement the Model Context Protocol specification. They provide tools, resources, and prompts for LLM integration and demonstrate SDK usage patterns across multiple programming languages (C#, Go, Java, Kotlin, PHP, Python, Ruby, Rust, Swift, TypeScript).

Quickstart

Get the servers source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/modelcontextprotocol/servers.git2cd servers3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

LLM Integration Foundation

Use as reference implementations to understand MCP patterns and build custom servers for your own tools, APIs, or data sources that LLMs need access to.

Educational Reference

Developers learning MCP server implementation can study the official reference servers to understand best practices, SDK usage, and correct protocol implementation across languages.

Rapid Prototyping with Claude Desktop

Configure reference servers directly into Claude Desktop or other MCP clients via simple JSON configuration to extend LLM capabilities with filesystem, git, web fetch, or memory features without custom development.

Implementation considerations

Choose deployment method: npx for TypeScript servers or uvx/pip for Python servers. Windows requires cmd /c wrapper around npx commands.
Configure servers via MCP client JSON (Claude Desktop example provided). Each server accepts different CLI arguments and environment variables; verify exact configuration for your use case.
Implement access controls per threat model: filesystem server accepts path arguments; database servers require connection strings; git server needs repository paths.
Security review required before production use. Reference servers omit hardening details; add rate limiting, authentication, input validation, and audit logging per your requirements.
Multiple language SDKs available; select the one matching your infrastructure and team expertise (Python most flexible; TypeScript simplest for Node.js environments).

When to avoid it — and what to weigh

Production AI Systems Without Customization — README explicitly warns these are reference implementations, not production-ready. Direct use in production requires security review, threat modeling, and likely custom safeguards for your specific threat model.
Proprietary License Requirements — Mixed licensing (Apache 2.0 for new contributions, MIT for existing code) may complicate compliance in projects requiring single-license uniformity or commercial indemnification.
Archived Feature Dependencies — If you need GitHub, PostgreSQL, Redis, Slack, Google Drive, or AWS KB Retrieval integrations, those reference servers are archived. Community or third-party alternatives must be sourced.
Guaranteed Long-term Stability — Servers are reference implementations maintained by the MCP steering group; priorities may shift. No SLA or backwards-compatibility guarantee stated. Requires monitoring and possible custom maintenance.

License & commercial use

Dual licensing: Apache License 2.0 for new contributions, MIT for existing code. Mixed licensing per the LICENSE file.

Apache 2.0 and MIT are both permissive OSI-approved licenses allowing commercial use. However, the README explicitly states servers are reference implementations for educational purposes, not production-ready solutions. Commercial deployment requires independent security review, threat modeling, and appropriate safeguards. Requires legal review for your use case.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Adequate
License clarity	Needs review
Deployment complexity	Moderate
DEV.co fit	Good
Assessment confidence	High

Security considerations

README includes explicit WARNING: servers are reference implementations, not production-ready, and require developers to evaluate security requirements and implement appropriate safeguards. No details on vulnerability handling, but SECURITY.md file exists for reporting. No claims of cryptographic hardening, input sanitization, rate limiting, or access control audits provided in available data. Filesystem server allows configurable path access; database servers require sensitive credentials; git server requires repo access. Requires independent security assessment before deployment.

Alternatives to consider

Community MCP Servers (MCP Registry)

The repository itself directs users to browse the MCP Registry for published community-built servers. Archived reference servers (GitHub, Slack, PostgreSQL, etc.) have been moved to community maintenance or third-party repositories.

Anthropic Claude API Direct Integration

If LLM tool access is the goal and you control the LLM, direct API integration may reduce protocol overhead and operational complexity compared to running separate MCP servers.

LangChain / LlamaIndex Tools

Alternative frameworks for grounding LLMs with tool integrations; may offer more pre-built integrations and simpler configuration for specific domains (databases, search, APIs) without MCP server overhead.

Software development agency

Build on servers with DEV.co software developers

Explore MCP reference servers for filesystem, git, memory, and web access. Start with Claude Desktop integration or build custom servers using official SDKs in your language.

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servers FAQ

Are these servers safe to use in production?

No. The README explicitly states they are reference/educational implementations, not production-ready solutions. You must evaluate security requirements, implement safeguards per your threat model, and conduct security review before production deployment.

Why are some servers (GitHub, PostgreSQL, Slack, etc.) archived?

Archived servers are moved to a separate repository and maintained by the community or third parties. Check the servers-archived GitHub repository or the MCP Registry for maintained alternatives.

How do I run these servers?

TypeScript servers: `npx -y @modelcontextprotocol/server-<name>`. Python servers: `uvx mcp-server-<name>` or `pip install mcp-server-<name> && python -m mcp_server_<name>`. Configure them in an MCP client (e.g., Claude Desktop) via JSON.

Do I need to fork or modify these servers?

For most use cases, yes. The reference servers demonstrate MCP patterns; customize them for your specific tools, APIs, and security requirements using the provided SDKs (TypeScript, Python, Go, Rust, etc.).

Software developers & web developers for hire

Adopting servers is usually one piece of a larger software development effort. As a software development agency, DEV.co provides software development services and web development expertise — pairing senior software developers and web developers with your team to design, build, and operate mcp servers software in production.

Ready to Extend Your LLM?

Explore MCP reference servers for filesystem, git, memory, and web access. Start with Claude Desktop integration or build custom servers using official SDKs in your language.

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