Plain.com MCP Server

An MCP server for querying your Plain.com support backlog from Claude.

Setup

1. Install dependencies:

bun install

2. Get your Plain.com API key from Settings → API Keys with thread:read and customer:read permissions.

3. Add to your Claude Code config (~/.claude.json):

{
  "mcpServers": {
    "plain": {
      "command": "bun",
      "args": ["run", "/home/ubuntu/projects/plain-mcp/src/index.ts"],
      "env": {
        "PLAIN_API_KEY": "your-api-key"
      }
    }
  }
}

4. Restart Claude Code to load the MCP server.

Available Tools

list_threads

List support threads with optional status filter.

• status: "todo" | "snoozed" | "done" (default: "todo")
• limit: 1-100 (default: 25)

get_thread

Get detailed thread info including conversation timeline.

• thread_id: The thread ID to fetch

search_customers

Find customers by email.

• email: Email address to search

get_queue_stats

Quick overview of support queue with counts by status.

Example Usage

Ask Claude:

• "Show me all todo threads"
• "Get the details of thread th_xxx"
• "How many threads need attention?"
• "Find customer john@example.com"