"Servers that support Server-Sent Events (SSE)" matching MCP servers:

Turns ordinary third-party provider webhooks, starting with Resend inbound email, into MCP Events that agents can subscribe to and act on. Hookdeck Event Gateway verifies, stores, filters, dedupes and retries delivery to each subscriber's callback, while the server exposes event catalog, subscribe/unsubscribe, and past-event lookup tools.

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

Enables an AI agent to act as first-line customer support on top of Microsoft Dynamics 365 / Dataverse, reading incoming synced emails, looking up contacts and published knowledge articles, and drafting HTML-safe replies or escalating to a human as a Case. Runs draft-only by default with safeguards against prompt injection, duplicate replies, and unsafe recipients.

An MCP server that enables AI agents to manage Smartlead campaigns, including creating campaigns, updating schedules, managing email sequences, and adding leads, all over SSE.

Provides email sending and receiving via SMTP/IMAP/POP3, supporting major email providers and dynamic authentication for AI assistant integration.

Enables AI-driven customer support ticket processing, including classification, response generation, and automated email sending and Google Sheets logging.

Local-first Microsoft Outlook MCP server: a single Go binary that manages calendar events and mail through the Microsoft Graph API over stdio, with tokens stored in the OS keychain and no Entra ID app registration required. Exposes four aggregate tools (calendar, mail, account, system) dispatched by an operation verb, with multi-account support and read-only and mail-gating modes.

Enables sending emails and listing sent emails with delivery status and open/click counts via the Maillog API.

Enables an assistant to send email and list sent emails through the Maillog email API.

Reads and searches Thunderbird mail from local mbox files and sends mail via SMTP using auto-discovered identities, filing copies in Thunderbird's Sent folder.

Enables AI agents to search, read, and draft emails across multiple Gmail accounts using short aliases, while requiring human approval before any message is sent.

An MCP server that creates calendar events for FIFA World Cup matches and sends email reminders with match details.

MCP server that gives AI agents direct access to Google services including Gmail, Calendar, Drive, and more, with multi-account OAuth support. Enables reading and sending email, managing calendar events, and interacting with Google files through natural language.

An MCP server that enables AI assistants to interact with Google Calendar and Gmail, allowing users to manage events, send emails, and organize their inbox through natural language.

An MCP server for Gmail that allows AI assistants to read, search, compose drafts, send emails, and manage labels with attachment support.

Connects MCP-compatible AI assistants to any IMAP/SMTP mailbox, enabling email search, reading, folder management, and sending with automatic saving to Sent.

Enables an AI assistant to read and search iCloud mail, draft messages (never sent), manage calendar events with a preview/commit gate, and look up contacts via IMAP, CalDAV, and CardDAV.

A Model Context Protocol server that provides email access via IMAP and SMTP, enabling AI agents to read, search, send, and manage emails. It features specialized tools for folder management, message retrieval, and replying to threads through a standardized HTTP/SSE interface.

Enables AI assistants to search, read, label, move, and organize mail and folders through a local Bridge connection, create and manage drafts, and respond to calendar invitations. Ordinary messages are never sent.

Creates email drafts in the macOS Mail app using AppleScript, with support for recipients, subject, body, attachments, and sender selection. No email is sent; drafts are saved locally and synced to the mail server by Mail.

MCP server for Forward Email that provides tools to manage email inbox, send mail, calendar events, and contacts.

Enables AI assistants to read IMAP mailboxes and create drafts without sending them. Supports multiple accounts and folders, read-only message fetching, and search, with sending deliberately disabled so drafts are reviewed and sent manually.

Enables MCP clients and coding agents to send transactional emails, retrieve a message by ID, and list sent emails through the Postlane API using an API key and verified sender domain.

Provides AI assistants with read-only access to iCloud mail and calendar via IMAP and CalDAV, with opt-in write support for sending mail, managing events, and contacts.

Checks a message thread before an agent replies, returning a keep/review/fail verdict with the reasons behind it so replies to autoresponders, bounces, or other bots are stopped. Also classifies single messages and, with a ledger, records sent and received messages across channels and threads to catch loops that span conversations.

MCP server for GNOME Evolution that enables calendar and email operations such as listing calendars/events, sending emails, and searching messages through the Evolution Data Server.

Enables an assistant to search and read mail across multiple Gmail accounts, create drafts in the correct account and thread, apply labels, archive or mark read reversibly, and view events from every calendar in read-only mode. Sending and deleting are deliberately not exposed, so all outgoing mail is reviewed and sent by the user.

Enables AI assistants to work directly with a local Thunderbird client, providing roughly 40 tools to search and read mail, compose, reply and forward messages, manage folders, filters, contacts, calendars, events and tasks. Write operations open a review window by default, so nothing is sent or created without the user's confirmation.

A mail service that connects private domain email to MCP clients, enabling sending (with auto signature), receiving, and reading emails through natural language via stdio or SSE transport.

Enables sending emails via Gmail API, checking thread replies, and listing sent emails, all logged locally in SQLite.