Add writer MCP

[jonathan-politzki]

Description

Add Writer MCP to community servers section in README.md

Server Details

• Server: Writer MCP - new community server
• Changes to: README.md documentation to include Writer MCP server

Motivation and Context

This addition helps content creators by providing an MCP server that connects Claude to Substack/Medium writing. The server enables semantic search and analysis of published content, making it easier for writers to get AI assistance with their existing work.

How Has This Been Tested?

I have tested this MCP server with Claude Desktop, successfully connecting to Substack and Medium blogs. Tests included retrieving content, performing semantic searches across essays, and using content as context for writing assistance.

Breaking Changes

No breaking changes. This is a new server that users can optionally add to their configuration.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context

The Writer MCP server uses embeddings to find relevant essays based on user queries and makes individual essays available as separate resources for Claude. It also implements permanent caching to improve performance.

[olaservo]

Thanks for your contribution to the servers list. This has been merged in this combined PR: #2007

This is a new process we're trying out, so if you see any issues feel free to re-open the PR and tag me.