"OpenTimestamps - Bitcoin-based timestamping protocol" matching MCP servers:

A lightweight Docker-based email sending microservice that provides both REST API and MCP (Model Context Protocol) tools for sending emails, enabling AI agents to send email notifications.

Enables AI agents to send emails and manage sending domains, templates, analytics, and content checks through the SendByte platform using the Model Context Protocol.

A Model Context Protocol server for Plunk, the open-source self-hosted email platform. Provides 84 tools for transactional email, contacts, campaigns, segments, templates, workflows, events, and analytics through the Plunk API.

Enables AI agents to read, search, draft, send, reply to, forward, and organize Microsoft Outlook mail via Microsoft Graph, with safe-by-default read-only operation and browser-based sign-in.

An MCP server that gives AI agents permission-gated, audit-logged access to private email providers (Proton Mail via Bridge and plain IMAP), running locally with OAuth-based authentication and human-controlled escalation for destructive operations.

Provides tools for newsletter growth loops, welcome sequences, subject line audits, list metric interpretation, and monetization readiness based on engagement.

Provides temporary email services for AI agents, enabling closed-loop verification of email-based registration flows with multi-provider support, auto-registration, and verification code extraction.

Enables AI agents to create and send Gmail messages and append content to Google Docs through the MCP protocol.

Enables AI agents to search, read, send, and organize Gmail emails via MCP protocol.

Enables Gmail, Google Calendar, and Google Drive access through the Model Context Protocol, supporting email management, event scheduling, and file operations.

A Model Context Protocol (MCP) server that enables Claude Desktop to manage emails via SMTP and IMAP. Send emails, fetch unread messages, and create draft replies directly from conversations.

Connects AI assistants to BillionVerify email verification via the Model Context Protocol, supporting single and batch email verification, account balance checks, and webhook management.

Enables reading Gmail emails through the Model Context Protocol, supporting listing, searching, and retrieving email details with OAuth 2.0 authentication.

Provides 28 tools to read, search, send, and manage Yandex Mail emails via the Model Context Protocol.

Enables AI assistants to read, send, and manage emails, calendars, and contacts in a Fastmail account via the JMAP protocol.

Lets AI tools send transactional emails, check status, and manage contacts through the Model Context Protocol.

MCP server for Open-Xchange & standards-based mail: email (IMAP/SMTP), Sieve filters, CalDAV calendar, CardDAV contacts, free/busy.

A Model Context Protocol server for Google Workspace integration with send-as alias support, email templates, and scheduled send, enabling AI assistants to manage Gmail and Google Calendar through natural language.

Multi-account Gmail integration for AI assistants via the Model Context Protocol (MCP).

Enables reading and writing email through IMAP and SMTP accounts using natural language via the Model Context Protocol.