"How to publish messages on X (formerly Twitter)" matching MCP servers:

Sends document files (EPUB, PDF, DOCX, etc.) to your Kindle via email using Amazon's Send to Kindle feature.

An MCP server that sends plain-text Gmail messages only to a predefined allowlist, using generated recipient IDs instead of email addresses to enforce security.

One-pass agentic inbox triage as an MCP server: fetch unread Gmail → classify (action_needed/fyi/newsletter/noise) → summarize → extract tasks → draft replies as Gmail DRAFTS (never sends) → flag calendar → write a triage report. Four stdio tools (fetch_emails, save_gmail_draft, append_tasks, write_report); the host is the LLM, so it runs keyless in Claude Code. Gmail scopes: readonly + compose

A Model Context Protocol (MCP) server that allows Claude Desktop to send documents directly to your Kindle e-reader.

Enables pushing enriched leads into Instantly or Smartlead campaigns with ICP score gating, deduplication, and dry-run previews via an Apify actor.

Official MCP server for Shipmail, enabling agents to manage domains, mailboxes, messages, threads, webhooks, and suppressions via natural language.

Enables sending documents (Markdown, PDF, EPUB) directly to a Kindle via Amazon Send-to-Kindle email, with Markdown converted to EPUB using pandoc.

Enables AI assistants to search, read, draft, and send Gmail messages, as well as manage labels and trash using natural language.

Enables read-only Gmail access via MCP, allowing users to list and retrieve email messages with query and pagination support.

Enables MCP clients to exchange an MCP-audience token for a Microsoft Graph token and call Graph as the signed-in user, with tools for identity verification and recent mail access.

Enables Gmail label management with tools to list, create, delete labels, and modify labels on messages and threads, handling OAuth2 authentication automatically.

Enables reading and searching emails in Microsoft Outlook classic on Windows via COM, with tools for listing folders, searching mail, reading messages and threads, and extracting attachments.

Provides rules, checklists, and audits for cold outreach deliverability across email, LinkedIn, Instagram, and X, helping ensure messages land in inboxes rather than spam folders.

Enables AI assistants to read and search Proton Mail inbox through Proton Mail Bridge, providing tools to list mailboxes, list messages, search messages, and fetch full message bodies. Read-only, with secure certificate pinning.

Gives Claude (or any LLM) full control over Apple Mail — read, search, compose, reply, move, flag, and delete messages — via AppleScript on your local machine, with no cloud intermediary.

Lets Claude connect to a Yahoo Mail account with an app password to read messages, create and manage folders, move messages, and compose or send email, with an optional read-only mode.

Enables searching and reading email across permitted accounts and mailboxes on macOS, plus optionally saving drafts for review, without sending or deleting messages.

Scans your Microsoft 365 Outlook, Teams, and calendar to surface conversations still waiting on you, and drafts reply messages you can approve and send without leaving your MCP client.

Enables AI assistants to read, send, and manage Gmail, Discord, and X (Twitter) via a self-hosted private server with configurable limits and a dashboard for monitoring.

Connects AI assistants to the Kit.com (formerly ConvertKit) email marketing platform, enabling management of subscribers, tags, sequences, broadcasts, and more through natural language.