"Understanding Unrestricted Model Abilities" matching MCP servers:

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.

One MCP server holding a live session with every client's account at once, so one agent can read across a dozen businesses and write inside only the one you name. It forwards each provider's own MCP tools (Cloudflare, Vercel, Resend, Supabase, Linear, Notion, Sentry, Netlify and more) with that client's credentials, and adds deterministic DNS and email checks that never call a model.

Diagnoses a domain's email authentication — SPF, DMARC, DKIM, MX, blacklists and domain or SSL expiry - and returns copy-paste fix records generated by a validating engine, never a language model. The MCP server is hosted remotely; this repository carries the plugin manifest, connector config and bundled skill.

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

It enables AI assistants to search, read, and draft email in a Gmail inbox, and at the highest access level to send mail and reorganize labels, archive, or trash messages. Access is gated behind three levels — read-only by default, drafts-only, and full — so the model is only offered the tools its configured level permits.

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.

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

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.

Enables AI agents to send and manage email, read threaded replies, run campaigns and automations, and handle approvals through the Model Context Protocol from any compatible client.

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

A Model Context Protocol (MCP) server that provides access to the Fastmail API, enabling AI assistants to interact with email, contacts, and calendar data.

The email API your AI agent can actually use. A Model Context Protocol server for Send16 that gives Claude, Cursor, and any MCP client 79 tools to send transactional & marketing email, manage contacts, audiences, segments, automations, templates, the inbox, suppressions, and webhooks.

Agentic HR assistant providing employee, leave, meeting, ticket, and email tools over the Model Context Protocol, designed to automate onboarding workflows via an MCP client such as Claude Desktop.