blacklist_check — MailX Email Deliverability MCP Tool
blacklist_check
(blacklist check) is one of 16 tools on the
MailX Email Deliverability
MCP server. Connect the server and your client discovers it on the handshake.
by client
How to call blacklist_check from your client
- Claude Code MailX Email Deliverability blacklist_check run in your project directory
- Claude Desktop MailX Email Deliverability blacklist_check ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor MailX Email Deliverability blacklist_check ~/.cursor/mcp.json
- VS Code MailX Email Deliverability blacklist_check .vscode/mcp.json
- Zed MailX Email Deliverability blacklist_check ~/.config/zed/settings.json
- Windsurf MailX Email Deliverability blacklist_check ~/.codeium/windsurf/mcp_config.json
- Cline MailX Email Deliverability blacklist_check ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI MailX Email Deliverability blacklist_check ~/.gemini/settings.json
- Grok MailX Email Deliverability blacklist_check .mcp.json (in your project root)
- ChatGPT MailX Email Deliverability blacklist_check Settings → Connectors → Advanced → Developer mode
- Claude.ai MailX Email Deliverability blacklist_check Settings → Connectors → Add custom connector
- LangChain MailX Email Deliverability blacklist_check pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http email-deliverability https://themailx.com/mcpOther tools on this server
This list was read from the server itself, by connecting to it and calling tools/list on 24 September 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.