"Creating an MCP server that connects to a blockchain" 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.

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

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

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.

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

MCP server for Yahoo Mail over IMAP+SMTP that enables AI assistants to manage emails fully—listing, reading, searching, threading, flagging, moving, archiving, handling attachments, and sending/reply/forward/draft—using an app-specific password.

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

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

Enables AI assistants to interact with Microsoft 365 and Office services through the Microsoft Graph API, providing tools for email, calendar, files, Teams, SharePoint, and more with configurable permissions and output formats.

Enables AI agents to send emails, create drafts in Gmail, and append content to Google Docs via standardized MCP tools.

An MCP server that exposes a local notmuch email database to an LLM client such as Claude. It is read-first: searching, reading, and understanding mail is always available; writing anything (drafts, tags, exported files) requires an explicit opt-in flag and is confined to clearly bounded locations.

Read-only MCP server that connects to multiple IMAP accounts, enabling cross-account email listing, search, and retrieval without modifying mailboxes.

A read-only MCP server that connects to Proton Mail via Proton Bridge, enabling AI assistants to search, list, and read emails securely without leaving your machine.

A local MCP server that connects Claude Desktop to a personal Hotmail/Outlook.com mailbox via Microsoft Graph API, enabling email management, rule handling, and composing messages.

Provider-agnostic email MCP server that connects any IMAP mailbox to AI assistants, enabling email management through natural language.

A tool that connects to Substack's official Publisher API to access posts, newsletters, analytics, and subscribers, compatible with MCP clients like Claude and Cursor.

Enables creating Gmail drafts through a single tool, returning draft URLs for the owner to review and send manually.

Connects any MCP client to a Yahoo mailbox over IMAP for reading, searching, organizing, and batch managing messages and folders. It also supports downloading attachments and creating or revising drafts, never sending email.

MCP server that connects Claude to iCloud Mail, enabling reading, searching, sending, and organizing emails via IMAP/SMTP.

K-Mail-MCP is an MCP server that connects 6 mail services — Naver, Daum/Kakao, Gmail, Nate, Yahoo, and iCloud — to Claude AI. It enables AI-powered email summarization, translation, spam detection, and unified inbox management — all with AES-256-GCM encrypted credentials.

An MCP server that exposes IMAP operations as tools for AI assistants, enabling email management including listing mailboxes, reading, searching, moving, flagging emails, and creating drafts.

A Model Context Protocol (MCP) server that connects AI agents to Google Workspace (Gmail, Calendar, Drive, Docs, Sheets, and Slides).

MCP server that connects Claude with Gmail to read, send, delete, and manage messages and labels via the Google Gmail API.

Connects Gmail and Telegram via an MCP server, enabling users to interact with their emails through a Telegram bot with commands for summaries and audio.

MCP server that connects AI agents to your Paragraph publication, enabling post management, subscriber analytics, and search across posts and publications.

A unified MCP server that connects HubSpot, Clay, Apollo, Slack, and email to enable AI agents to execute multi-step GTM workflows such as prospecting, enrichment, CRM updates, and notifications.

MCP server that connects to Windows Classic Outlook to automate email organization, search, and reply draft creation without sending emails.

Connects AI agents to self-hosted Stalwart mail servers via a Cloudflare Worker and JMAP, enabling mailbox search, reading, listing, and two-step draft-and-send email operations through MCP.

Connects a single Mail.ru mailbox to ChatGPT through Google OAuth and IMAP, enabling folder listing, email search, non-destructive reading, moving messages, and moving selected messages to the trash.