send_letter — Postly MCP Tool Mutating
send_letter
(send letter) is one of 7 tools on the
Postly
MCP server. Connect the server and your client discovers it on the handshake.
by client
How to call send_letter from your client
- Claude Code Postly send_letter run in your project directory
- Claude Desktop Postly send_letter ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Postly send_letter ~/.cursor/mcp.json
- VS Code Postly send_letter .vscode/mcp.json
- Zed Postly send_letter ~/.config/zed/settings.json
- Windsurf Postly send_letter ~/.codeium/windsurf/mcp_config.json
- Cline Postly send_letter ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Postly send_letter ~/.gemini/settings.json
- Grok Postly send_letter .mcp.json (in your project root)
- ChatGPT Postly send_letter Settings → Connectors → Advanced → Developer mode
- Claude.ai Postly send_letter Settings → Connectors → Add custom connector
- LangChain Postly send_letter pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http postly https://postly.dk/api/public/v1/mcpOther tools on this server
This list was read from the server itself, by connecting to it and calling tools/list on 11 November 2026. It is what
the server actually exposes, not what its listing claims.
Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.