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Dead-Letter

Verified Integration
Author: @BigCactusLabs•Category: ServerApplication
GitHub Repository
JSON-RPC 2.0
Protocol Standard
Sub-second
Execution Latency
Active
Operational Status
Tags:#Claude#Search#Database#API#Python#Git#Filesystem#AI#GitHub#Node.js#Automation

Client Configuration

— Connect Dead-Letter to Claude Desktop or Cursor in seconds
{
  "mcpServers": {
    "dead-letter": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-dead-letter"
      ],
      "env": {}
    }
  }
}
Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).
Architecture & Capabilities

System Overview

Converts email exports from .eml format into structured Markdown with YAML front matter, optimizing them for further processing.

Indexed Date

7/23/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Dead-Letter

Dead-Letter is a developer tool that converts `.eml` email export files into clean, structured Markdown with YAML front matter. Its primary purpose is to optimize email content for downstream processing, particularly for Large Language Model (LLM) and retrieval pipelines.

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