Licensing Implications of Using Open-Source MCP Server Implementations in Commercial Projects

While the punkpeye/awesome-mcp-servers repository is released under the MIT License, each individual MCP server implementation carries its own license terms that independently govern commercial usage, modification rights, and source code disclosure obligations.

The punkpeye/awesome-mcp-servers repository serves as a comprehensive curated index of Model Context Protocol (MCP) server implementations. While the compilation itself is governed by the permissive MIT License found in the repository's root LICENSE file, the list links to dozens of independently maintained projects—each subject to distinct licensing terms ranging from permissive MIT to restrictive AGPL. When integrating these servers into commercial products, you must comply with the specific license of each implementation rather than the umbrella license of the list itself.

Repository Structure and Licensing Scope

The LICENSE file at the root of punkpeye/awesome-mcp-servers applies only to the list's documentation and compilation logic. The README.md file contains links to external repositories such as Correctover/mcp-server and mcpqueen/mcpqueen, each maintaining their own LICENSE files in their respective root directories. The CONTRIBUTING.md guidelines specify that contributions to the list must be compatible with the MIT license, but this requirement does not extend to the third-party servers being cataloged.

When selecting an MCP server for commercial deployment, you must locate and analyze the specific LICENSE file within that server's repository. The license identifier typically appears in the first line of the file and determines your legal obligations regarding attribution, modification, and redistribution.

License Categories and Commercial Requirements

Permissive Licenses (MIT, BSD, Apache 2.0)

Permissive licenses grant broad commercial rights including use, modification, distribution, sublicensing, and sale. The MIT and BSD licenses require only that you retain the original copyright notice and license text in your distributions. Apache 2.0 adds a specific requirement to include any NOTICE file present in the source repository.

For commercial projects, these licenses impose no obligation to open-source your derivative work. You can embed MIT-licensed MCP servers directly into proprietary applications or modify them for internal use without disclosing your changes to end users.

Weak Copyleft (LGPL-2.1, LGPL-3.0)

The Lesser General Public License creates a boundary between the licensed server and your proprietary code. If you run the MCP server as a separate process communicating via HTTP or STDIO, you can keep your main application closed-source. However, if you modify the server code itself or embed it as a linked library within your application, you must publish those modifications under the same LGPL terms and provide a mechanism for users to relink against modified versions.

Strong Copyleft (GPL-2.0, GPL-3.0, AGPL-3.0)

Strong copyleft licenses extend derivative work obligations to your entire application under specific conditions. GPL-2.0 and GPL-3.0 require that any distributed combined work be released under the same GPL terms. AGPL-3.0 introduces the "network use" clause: if you host the server and users interact with it over a network, you must make the complete source code—including any modifications—available to those users, regardless of whether you distribute binaries.

For AGPL-licensed MCP servers like mcpqueen/mcpqueen, merely exposing the service via API endpoints triggers the source disclosure requirement, making this license particularly significant for SaaS deployments.

Dual-Licensing and Commercial Alternatives

Some MCP server maintainers offer dual-licensing models, providing both an open-source license (typically GPL or AGPL) and a paid commercial license. The commercial license may remove copyleft obligations, provide service-level agreements, or grant additional usage rights. You must verify which license governs your specific deployment and purchase the commercial license if your use case violates the open-source terms.

Evaluating Individual Server Licenses

Follow this systematic approach to determine compliance requirements for any MCP server listed in the awesome-mcp-servers repository:

1. Locate the license file – Navigate to the root of the server's repository (e.g., https://github.com/Correctover/mcp-server) and open the LICENSE file.

2. Identify the license type – Read the first line to determine if it is MIT, Apache-2.0, GPL-3.0, AGPL-3.0, or another variant.

3. Determine your integration scenario:

   • Pure consumption: Calling the server via MCP/HTTP API without modifying code
   • Embedding: Importing server code as a library or copying files into your codebase
   • Forking/modifying: Changing source code and redistributing the server

4. Map scenario to obligations – Apply the permissions and restrictions from the identified license category to your specific use case.

Implementation Examples for License Compliance

MIT-Licensed Server Deployment

When containerizing an MIT-licensed server such as Correctover/mcp-server, preserve the license notice using Docker labels:

# docker-compose.yml

services:
  mcp-server:
    image: ghcr.io/correctover/mcp-server:latest
    ports:
      - "8080:8080"
    labels:
      - "org.opencontainers.image.licenses=MIT"
      - "org.opencontainers.image.title=Correctover MCP Server"
      - "org.opencontainers.image.authors=Correctover"

This approach satisfies the MIT requirement to retain copyright notice while integrating the server into your commercial infrastructure.

AGPL-Licensed Server Modification

If you modify an AGPL-licensed server like mcpqueen/mcpqueen, you must publish the changes:

# Clone the AGPL-licensed repository

git clone https://github.com/mcpqueen/mcpqueen.git
cd mcpqueen

# Make modifications (example: adding health-check endpoint)

sed -i '/app = FastAPI()/a\
@app.get("/health")\n    def health():\n        return {"status": "ok"}' main.py

# Commit and publish (required by AGPL-3.0)

git commit -am "Add health-check endpoint"
git push origin main

The AGPL-3.0 license explicitly requires that any network-exposed modifications be made available to all users interacting with the service over a network.

Consuming AGPL Services Without Modification

Even when calling an AGPL server via API without embedding its code, you must comply with source disclosure:

import requests

# Consume AGPL-licensed MCP server via HTTP API

response = requests.post(
    "https://mcpqueen.com/api/v1/tools/list",
    json={"session_id": "example"},
    timeout=5
)

print(response.json())

When deploying this configuration, you must provide users access to the server's source code through a link in your product documentation or a SOURCE_CODE_URL environment variable, satisfying the AGPL network use clause.

Common Licensing Pitfalls in Commercial Use

• Assuming transitive permissions – Dependencies of the MCP server may carry different licenses than the server itself. A server licensed under MIT might depend on GPL libraries, triggering copyleft obligations.

• Confusing hosting with distribution – AGPL licenses treat network interaction as a form of distribution, requiring source disclosure for SaaS deployments even when you do not ship binaries to customers.

• Creating incompatible combinations – Linking a GPL-licensed MCP server directly into a proprietary binary creates a license violation. Maintain separation by running the server as a separate process or microservice.

Pre-Production Compliance Checklist

Before deploying any MCP server in a commercial environment:

• Identify the specific MCP server repository and locate its root LICENSE file
• Record the exact license identifier (MIT, Apache-2.0, GPL-3.0, AGPL-3.0, LGPL-3.0)
• Determine whether your use involves modification, embedding, or pure API consumption
• Verify compatibility of transitive dependencies listed in requirements.txt or package.json
• Add required copyright notices or NOTICE files to your distribution or Docker image labels
• For AGPL servers, establish a public source code repository or documentation link for modified versions
• If using dual-licensed software, confirm you have purchased the appropriate commercial license for your deployment scale

Summary

• The awesome-mcp-servers repository's MIT License applies only to the list itself, not to individual server implementations.
• Permissive licenses (MIT, BSD, Apache 2.0) allow unrestricted commercial use with minimal attribution requirements.
• Copyleft licenses (GPL, AGPL) require source code disclosure for derivative works, with AGPL specifically mandating disclosure for network-hosted services.
• LGPL provides a middle ground allowing proprietary use when the server runs as a separate process rather than an embedded library.
• Always verify the specific LICENSE file in the target server's repository and audit its dependencies before commercial deployment.

Frequently Asked Questions

Can I use MIT-licensed MCP servers in closed-source commercial products?

Yes. The MIT License explicitly permits commercial use, modification, and distribution within proprietary applications. You must only retain the original copyright notice and license text in your software distribution or container metadata. There is no requirement to disclose your source code or publish modifications.

What triggers the AGPL source disclosure requirement for MCP servers?

The AGPL-3.0 license requires you to provide source code to any user who interacts with the MCP server over a network, including via HTTP or STDIO protocols. This applies whether you modify the server or simply deploy an unmodified version as a service. You must make the complete corresponding source code available through a download link or equivalent mechanism in your application documentation.

How do I comply with licensing when forking an MCP server to add features?

If you fork a permissively licensed server (MIT/BSD/Apache), include the original license file in your repository and preserve copyright notices in modified files. If you fork a copyleft server (GPL/LGPL/AGPL), you must release your modified version under the same license. For LGPL, linking exceptions apply only if the server remains a separate program; static linking or embedding triggers the copyleft requirements for your main application.

Does the awesome-mcp-servers repository guarantee license compatibility for all listed servers?

No. The repository's CONTRIBUTING.md requires that submissions be compatible with the MIT license, but this governs the list's content, not the third-party servers. Each linked repository maintains independent licensing terms. You must verify the current LICENSE file in each server's repository before integration, as maintainers may change licenses between versions.

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