"MCP servers that use streamable HTTP as transport" matching MCP servers:

Enables AI agents to analyze whether they should send an email, evaluating passive aggression and regret probability with a recommendation heavily weighted toward no.

Streamable HTTP MCP server for Gmail that enables AI agents to search threads, read messages, manage drafts, and organize the inbox via OAuth authentication.

Enables AI assistants to interact with Fastmail services, providing tools for comprehensive email management, contact searching, and calendar event coordination via the JMAP API. It supports advanced features like threaded conversations, attachment handling, and bulk mailbox operations through natural language.

Streamable HTTP MCP server for Gmail enabling search, read, draft management, and inbox organization.

Give AI agents their own email inboxes. Create, send, receive, and manage email entirely via MCP tools.

Enables managing multiple Gmail accounts under one OAuth client, with per-account access levels, cross-account search, and read/write operations via stdio or Streamable HTTP.

An email MCP server that lets Claude or any MCP client search, read and draft mail via IMAP, treating every message as untrusted input. It prioritizes safety with plain-text-only bodies, disabled sending until an allowlist is set, and no bcc support.

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

An MCP server for Microsoft Graph, exposing 60 tools across calendar, email, meetings, Teams chat, files, people, directory, tasks, and OneNote over stdio or Streamable HTTP.

Access 5+ ATXP agent tools via MCP: web search, AI image generation, email, and music generation. Free tier with pay-per-use Pro tier via x402 micropayments (USDC on Base mainnet).

Enables AI agents to publish static sites and build folders as live websites, push updates, provision and manage custom domains with DNS, and send transactional email. Ships as a local pip/uvx server that reads build folders directly, or as a hosted HTTP endpoint for Claude Code, Claude Desktop, and other MCP clients.

Enables AI agents to interact with an OVH Exchange mailbox via EWS and NTLM authentication, including searching, reading, sending, replying to, and forwarding emails, as well as managing folders and attachments.

An MCP-compliant server that exposes Gmail and Google Docs as tools, enabling AI agents to draft, send, and manage emails, as well as create, read, and append to documents through natural language.

A local MCP server that enables multi-account read-only access to Google Workspace services such as Gmail, Calendar, and Drive through named profiles.

Self-hosted MCP server that exposes Synology Drive, Spreadsheet, MailPlus, and Calendar as structured tools for AI agents, enabling file, spreadsheet, email, and calendar management via natural language.

Deprecated MCP server wrapper for ms365-email-cli that exposes Microsoft 365 email operations (list, read, send, reply, search, etc.) as MCP tools. Use the main ms365-email-cli package instead, which now includes built-in MCP server support.

MCP server that enables email management (send, read, search, delete, etc.) via IMAP/SMTP, compatible with Gmail, Outlook, Yahoo, iCloud, and other standard mail servers.

Gmail MCP server for searching, reading, and sending mail over MCP.

Manages temporary email addresses via the ChatTempMail API, supporting creation, listing, and deletion of emails and messages, as well as webhook configuration.

通过企业微信官方邮件API发送普通邮件，并支持查询邮箱信息，兼容stdio、sse和streamable-http传输方式。