Ext Ops Panel
Abrir o painel

3LT Letter Mail

Give AI assistants hands: send real USPS letters via MCP.

Servidor MCP · de 3lgrouptechnology.com

Resumo

3LT Letter Mail é um servidor MCP publicado por 3lgrouptechnology.com. Marketplaces que lemos e que o listam: 1 (Official MCP Registry). Vimos pela primeira vez em 2026-10-11 e não registramos mudanças desde então. Conforme nossa passagem pelos marketplaces em 2026-10-26.

O que pede

  • Roda remotamente

Nenhum dos marketplaces que lemos publica as ferramentas ou as configurações que ele pede.

O que declara, pede e executa, por completo

Instale apenas plugins de desenvolvedores em quem você confia. Mostramos o que os marketplaces publicam e não testamos plugins.

Funciona com

  • Claude Code
  • Codex
  • Cursor
  • VS Code
  • Copilot CLI

Um link de um clique abre o cliente, que pede confirmação antes de adicionar o servidor.

Pelos marketplaces que o listam e pelo transporte MCP que declara, conforme cada cliente documenta. Não testamos plugins.

Conectar

Comandos e configurações gerados apenas a partir do que os marketplaces declaram. Não os executamos por você e não testamos plugins.

Como servidor MCP remoto

Gerado a partir do que Official MCP Registry declara.

Claude CodeTerminal
claude mcp add --transport http 3lt-letter-mail https://3lgrouptechnology.com/mcp
Codex~/.codex/config.toml
[mcp_servers.3lt-letter-mail]
url = "https://3lgrouptechnology.com/mcp"
Cursor~/.cursor/mcp.json
{
  "mcpServers": {
    "3lt-letter-mail": {
      "url": "https://3lgrouptechnology.com/mcp"
    }
  }
}

Onde está publicado

MarketplaceStatusVersãoNúmerosVerificadoVisto pela primeira vez
Official MCP Registry (Abrir o registro) Listado 1.0.0 Forks (GitHub): 0
Estrelas (GitHub): 0
Sem marcação

Cada número é do próprio marketplace e nunca é somado entre marketplaces. Um marketplace que não publica números não mostra nenhum: sem número não é zero.

O que mudou

Nada mudou neste plugin desde que começamos a acompanhá-lo.

Plugins semelhantes

Produtos cujos próprios nomes, descrições, ferramentas e skills são os mais próximos deste pelo significado, em todos os marketplaces que lemos. A proximidade é ordenada apenas dentro desta lista.

  • Agent Letter Desk

    Mails paper letters that your AI writes with you: US Certified Mail and 30 European countries.

    de agentletterdesk.com · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • mailsnail io.github.iancollins27/mailsnail

    Send USPS letters, postcards & certified mail from any agent. No signup; pay-per-piece via Stripe.

    de iancollins27 · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • PieterPost MCP

    Let AI agents prepare, review, pay for, and send real letters and postcards.

    de neddes · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • PieterPost MCP

    Let AI agents prepare, review, pay for, and send real letters and postcards.

    de pieterpost-com · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • Briefflink – Briefe mit KI versenden

    Send real paper letters from AI chat: print, envelope, postage, delivery. Pay per letter.

    de briefflink.de · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • Lob MCP by usefulapi

    Verify US & international addresses and send physical mail (postcards, letters, checks) via Lob.

    de usefulapi.io · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • PaperAgent — Send Physical Mail

    Mail one-off USPS letters from ChatGPT or Claude after you approve the preview and price. US only.

    de paperagent.dev · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • No Errands Mail

    Mail real US letters, postcards and certified mail from an agent, quoted before sending.

    de noerrands.com · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • Have It Printed

    Print and mail physical documents in the US via USPS, with quotes, agent payment and tracking.

    de haveitprinted.com · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • solmail io.github.ExpertVagabond/solmail

    Send physical mail with Solana cryptocurrency - AI agents can send real letters worldwide

    de ExpertVagabond · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

Plugins semelhantes por marketplace

A mesma pergunta feita a cada marketplace separadamente: existe lá um equivalente deste plugin?

Listado em Claude Code: claude-plugins-community (5)
  • shippo

    Shippo connects you to USPS, UPS, FedEx, DHL, and 40+ carriers, so you can handle a shipment end to end right inside Claude. Compare live rates and pick the cheapest or best…

    de goshippo · Pacote de plugins

    Listado em: Claude Code: claude-plugins-official, Claude Code: claude-plugins-community · Descreve quase a mesma tarefa

  • resend

    Agent skills for working with Resend to send and receive emails — email API integration, agent inbox, CLI, React Email components, and deliverability best practices. Includes the…

    de resend · Pacote de plugins

    Listado em: Claude Code: claude-plugins-official, Claude Code: claude-plugins-community, Community GitHub marketplaces · Descreve quase a mesma tarefa

  • agenticmail

    Give every Claude Code subagent its own real email address and phone number, all self hosted on the user's machine. AgenticMail runs a local mail server (Stalwart in a Colima or…

    de agenticmail · Pacote de plugins

    Listado em: Claude Code: claude-plugins-community · Descreve quase a mesma tarefa

  • inkbox

    Inkbox gives Claude Code agents a persistent identity with a real email inbox, phone number, contacts, notes, and a zero-knowledge encrypted vault. The plugin bundles skills for…

    de inkbox-ai · Pacote de plugins

    Listado em: Claude Code: claude-plugins-community, Community GitHub marketplaces · Descreve quase a mesma tarefa

  • email-assistant

    Autonomous email triage and reply system. Drafts replies in your voice, saves as Gmail drafts, and learns from your corrections.

    de marian-kamenistak · Pacote de plugins

    Listado em: Claude Code: claude-plugins-community · Descreve quase a mesma tarefa

Listado em Claude Code: claude-plugins-official (5)
  • shippo

    Shippo connects you to USPS, UPS, FedEx, DHL, and 40+ carriers, so you can handle a shipment end to end right inside Claude. Compare live rates and pick the cheapest or best…

    de goshippo · Pacote de plugins

    Listado em: Claude Code: claude-plugins-official, Claude Code: claude-plugins-community · Descreve quase a mesma tarefa

  • resend

    Agent skills for working with Resend to send and receive emails — email API integration, agent inbox, CLI, React Email components, and deliverability best practices. Includes the…

    de resend · Pacote de plugins

    Listado em: Claude Code: claude-plugins-official, Claude Code: claude-plugins-community, Community GitHub marketplaces · Descreve quase a mesma tarefa

  • lovable

    Build, iterate on, deploy, and manage Lovable apps from Claude Code. Bundles the official Lovable MCP server (remote, OAuth 2.1) and adds focused commands for the common…

    de lovablelabs · Pacote de plugins

    Listado em: Claude Code: claude-plugins-official, Official MCP Registry · Descreve uma tarefa semelhante

  • mcp-apps

    Skills for creating MCP Apps with the MCP Apps SDK

    de modelcontextprotocol · Pacote de plugins

    Listado em: Claude Code: claude-plugins-official, Claude Code: claude-plugins-community, Community GitHub marketplaces · Descreve uma tarefa semelhante

  • figma

    Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…

    de figma · Pacote de plugins

    Listado em: Claude Code: claude-plugins-official, Official MCP Registry, Claude: knowledge-work-plugins, Copilot CLI: github/awesome-copilot · Descreve uma tarefa semelhante

Listado em Claude: knowledge-work-plugins (5)
  • Customer Support

    Triage tickets, draft responses, escalate issues, and build your knowledge base. Research customer context and turn resolved issues into self-service content.

    de Anthropic · Pacote de plugins

    Listado em: Claude: knowledge-work-plugins · Descreve quase a mesma tarefa

  • figma

    Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…

    de figma · Pacote de plugins

    Listado em: Claude Code: claude-plugins-official, Official MCP Registry, Claude: knowledge-work-plugins, Copilot CLI: github/awesome-copilot · Descreve quase a mesma tarefa

  • Desktop Commander

    MCP server for terminal commands, file operations, and process management

    de wonderwhy-er · Servidor MCP

    Listado em: Official MCP Registry, Claude Code: claude-plugins-official, Docker MCP Catalog, Claude: knowledge-work-plugins, Claude Code: claude-plugins-community, Community GitHub marketplaces · Descreve quase a mesma tarefa

  • Slack

    Slack integration for searching messages, sending communications, managing canvases, and more

    de Salesforce · Pacote de plugins

    Listado em: Claude: knowledge-work-plugins · Descreve quase a mesma tarefa

  • Pendo Orchestrate

    Create, configure and edit draft Pendo Orchestrate email journeys, including multi-email and conditional split flows, via the Pendo connector. Journeys stay in draft; activation…

    de pendo-io · Pacote de plugins

    Listado em: Claude Code: claude-plugins-official, Claude: knowledge-work-plugins · Descreve quase a mesma tarefa

Listado em Codex: openai-curated (openai/plugins) (5)
  • Gmail

    Work with Gmail using the configured Gmail app connector.

    de OpenAI · Pacote de plugins

    Listado em: Codex: openai-curated (openai/plugins) · Descreve quase a mesma tarefa

  • Outlook Email

    Work with Outlook Email using the configured Microsoft Outlook app connector.

    de OpenAI · Pacote de plugins

    Listado em: Codex: openai-curated (openai/plugins) · Descreve quase a mesma tarefa

  • ChatCut

    Install, open, and connect the signed ChatCut Desktop app from Codex.

    de ChatCut · Pacote de plugins

    Listado em: Codex: openai-curated (openai/plugins) · Descreve quase a mesma tarefa

  • Twilio Developer Kit

    Twilio Skills provide procedural knowledge for AI coding agents — which APIs to use, in what order, and what to avoid. Covers Messaging, Voice, Verify, SendGrid, and 30+ products.

    de Twilio · Pacote de plugins

    Listado em: Codex: openai-curated (openai/plugins) · Descreve quase a mesma tarefa

  • Slack

    Work with Slack using the configured Slack integration.

    de Slack · Pacote de plugins

    Listado em: Codex: openai-curated (openai/plugins) · Descreve uma tarefa semelhante

Listado em Community GitHub marketplaces (5)
  • e2a

    Open-source email API for applications and AI agents — transactional sending from any product, per-agent two-way inboxes, HITL approval, structured SPF/DKIM/DMARC evidence, and a…

    de TokenCanopy · Pacote de plugins

    Listado em: Community GitHub marketplaces · Descreve quase a mesma tarefa

  • resend

    Agent skills for working with Resend to send and receive emails — email API integration, agent inbox, CLI, React Email components, and deliverability best practices. Includes the…

    de resend · Pacote de plugins

    Listado em: Claude Code: claude-plugins-official, Claude Code: claude-plugins-community, Community GitHub marketplaces · Descreve quase a mesma tarefa

  • GigaMail

    Mail and calendar on your real mailbox (Microsoft 365 or IMAP) through the GigaMail MCP server, with out-of-band human approval on every send, delete and calendar write.

    de Adecubed · Pacote de plugins

    Listado em: Community GitHub marketplaces · Descreve quase a mesma tarefa

  • usps-webhooks

    Receive and verify USPS webhooks (Subscriptions - Tracking API v3.2). Use when setting up USPS tracking webhook handlers, debugging X-HMAC signature verification, creating…

    de Hookdeck · Pacote de plugins

    Listado em: Community GitHub marketplaces · Descreve quase a mesma tarefa

  • RTL Email

    Send email in right-to-left scripts (Hebrew, Arabic, Farsi, Urdu) that actually renders RTL. Plain-text email carries no direction metadata, so RTL bodies render LTR in many…

    de danielrosehill · Pacote de plugins

    Listado em: Community GitHub marketplaces · Descreve quase a mesma tarefa

Listado em Copilot CLI: github/awesome-copilot (5)
  • mcp-m365-copilot

    Comprehensive collection for building declarative agents with Model Context Protocol integration for Microsoft 365 Copilot

    de Awesome Copilot Community · Pacote de plugins

    Listado em: Copilot CLI: github/awesome-copilot · Descreve quase a mesma tarefa

  • figma

    Figma design platform integration. Access design files, extract component information, read design tokens, and translate designs into code. Bridge the gap between design and…

    de figma · Pacote de plugins

    Listado em: Claude Code: claude-plugins-official, Official MCP Registry, Claude: knowledge-work-plugins, Copilot CLI: github/awesome-copilot · Descreve quase a mesma tarefa

  • BLEA

    Safe BLE diagnostics, evidence workflows, and guarded automation for AI agents.

    de Nitmi · Servidor MCP

    Listado em: Official MCP Registry, Copilot CLI: github/awesome-copilot · Descreve quase a mesma tarefa

  • roundup

    Self-configuring status briefing generator. Learns your communication style from examples, discovers your data sources, and produces draft updates for any audience on demand.

    de Awesome Copilot Community · Pacote de plugins

    Listado em: Copilot CLI: github/awesome-copilot · Descreve quase a mesma tarefa

  • typespec-m365-copilot

    Comprehensive collection of prompts, instructions, and resources for building declarative agents and API plugins using TypeSpec for Microsoft 365 Copilot extensibility.

    de Awesome Copilot Community · Pacote de plugins

    Listado em: Copilot CLI: github/awesome-copilot · Descreve quase a mesma tarefa

Listado em Copilot CLI: github/copilot-plugins (5)
  • workiq

    Query Microsoft 365 data with natural language — emails, meetings, documents, Teams messages, and more.

    de microsoft · Pacote de plugins

    Listado em: Copilot CLI: github/copilot-plugins · Descreve quase a mesma tarefa

  • microsoft-365-agents-toolkit

    Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.

    de microsoft · Pacote de plugins

    Listado em: Copilot CLI: github/copilot-plugins · Descreve quase a mesma tarefa

  • mcp-apps

    Generate MCP App widgets for MCP tools. Produces self-contained HTML widgets using the MCP Apps protocol.

    de microsoft · Pacote de plugins

    Listado em: Copilot CLI: github/copilot-plugins · Descreve quase a mesma tarefa

  • canvas-apps

    Build Power Apps Canvas Apps using the Canvas Authoring MCP server.

    de microsoft · Pacote de plugins

    Listado em: Copilot CLI: github/copilot-plugins · Descreve quase a mesma tarefa

  • workiq-productivity

    WorkIQ productivity skills powered by the local WorkIQ CLI — read-only insights across email, meetings, calendar, Teams, SharePoint, projects, and people.

    de microsoft · Pacote de plugins

    Listado em: Copilot CLI: github/copilot-plugins · Descreve quase a mesma tarefa

Listado em Cursor: cursor/plugins (5)
  • Stable

    Find mail, read scanned documents, and call Stable API endpoints.

    de Cursor · Pacote de plugins

    Listado em: Cursor: cursor/plugins · Descreve quase a mesma tarefa

  • Docusign

    Manage envelopes, templates, workflows, and agreements.

    de Cursor · Pacote de plugins

    Listado em: Cursor: cursor/plugins · Descreve quase a mesma tarefa

  • beehiiv

    Run your beehiiv newsletter from chat: draft and edit posts, organize subscribers with tags, custom fields, and segments, build automations, and review publication, post, and…

    de Cursor · Pacote de plugins

    Listado em: Cursor: cursor/plugins · Descreve quase a mesma tarefa

  • Outlook

    Search, read, and send Microsoft Outlook email, and look up contacts.

    de Cursor · Pacote de plugins

    Listado em: Cursor: cursor/plugins · Descreve quase a mesma tarefa

  • Lark

    Search, create, and update Lark Suite docs, and read Lark messages and groups.

    de Cursor · Pacote de plugins

    Listado em: Cursor: cursor/plugins · Descreve quase a mesma tarefa

Listado em Docker MCP Catalog (5)
  • Resend

    The official MCP server to send emails and interact with Resend.

    de resend · Servidor MCP

    Listado em: Docker MCP Catalog · Descreve quase a mesma tarefa

  • Postman MCP Server

    Give your AI agents trusted access to the full Postman platform.

    de postman.com · Servidor MCP

    Listado em: Official MCP Registry, Docker MCP Catalog · Descreve quase a mesma tarefa

  • Plugged.in Proxy

    A unified MCP proxy that aggregates multiple MCP servers into one interface, enabling seamless tool discovery and management across all your AI interactions. Manage all your MCP…

    de VeriTeknik · Servidor MCP

    Listado em: Docker MCP Catalog · Descreve quase a mesma tarefa

  • Telnyx

    Enables interaction with powerful telephony, messaging, and AI assistant APIs.

    de docker · Servidor MCP

    Listado em: Docker MCP Catalog · Descreve quase a mesma tarefa

  • OpenMesh

    Discover and connect to a curated marketplace of MCP servers for extending AI agent capabilities.

    de docker · Servidor MCP

    Listado em: Docker MCP Catalog · Descreve quase a mesma tarefa

Listado em Official MCP Registry (5)
  • Agent Letter Desk

    Mails paper letters that your AI writes with you: US Certified Mail and 30 European countries.

    de agentletterdesk.com · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • mailsnail io.github.iancollins27/mailsnail

    Send USPS letters, postcards & certified mail from any agent. No signup; pay-per-piece via Stripe.

    de iancollins27 · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • PieterPost MCP

    Let AI agents prepare, review, pay for, and send real letters and postcards.

    de neddes · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • PieterPost MCP

    Let AI agents prepare, review, pay for, and send real letters and postcards.

    de pieterpost-com · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

  • Briefflink – Briefe mit KI versenden

    Send real paper letters from AI chat: print, envelope, postage, delivery. Pay per letter.

    de briefflink.de · Servidor MCP

    Listado em: Official MCP Registry · Descreve quase a mesma tarefa

Listado em PyPI (MCP servers) (5)
  • benethos-mailbox-mcp io.github.benethos-hub/benethos-mailbox-mcp

    MCP server that gives AI agents your mailboxes through mailbox-service, within its token's rights.

    de benethos-hub · Servidor MCP

    Listado em: Official MCP Registry, PyPI (MCP servers) · Descreve quase a mesma tarefa

  • Apple Mail MCP

    Apple Mail MCP server with full-coverage FTS5 body search, reliable on large mailboxes.

    de imdinu · Servidor MCP

    Listado em: Official MCP Registry, PyPI (MCP servers) · Descreve quase a mesma tarefa

  • Apple Mail

    Read, search, compose, and send emails via Apple Mail on macOS.

    de JonathanRReed · Servidor MCP

    Listado em: Official MCP Registry, PyPI (MCP servers) · Descreve quase a mesma tarefa

  • benethos-lexware-office-mcp io.github.benethos-hub/benethos-lexware-office-mcp

    Unofficial MCP server for the Lexware Office accounting API — runs over stdio or HTTP.

    de benethos-hub · Servidor MCP

    Listado em: Official MCP Registry, PyPI (MCP servers) · Descreve quase a mesma tarefa

  • Bale Bot

    Private, local Bale bot for agents: read, search and answer messages, ask and wait, files.

    de sepehr071 · Servidor MCP

    Listado em: Official MCP Registry, PyPI (MCP servers) · Descreve quase a mesma tarefa

Listado em npm registry (MCP servers) (5)
  • shipmail-mcp io.github.shipmail-to/shipmail-mcp

    Shipmail MCP server. Modern email for your business, with an API for your agents.

    de shipmail-to · Servidor MCP

    Listado em: Official MCP Registry, npm registry (MCP servers) · Descreve quase a mesma tarefa

  • imap-mcp-server io.github.nikolausm/imap-mcp-server

    IMAP/SMTP MCP server to search, read, organize, send, reply & forward email for AI assistants

    de nikolausm · Servidor MCP

    Listado em: Official MCP Registry, npm registry (MCP servers) · Descreve quase a mesma tarefa

  • Fluxmail

    Read, search, draft, send, and organize email through Gmail, Outlook, and IMAP/SMTP mailboxes.

    de churichard · Servidor MCP

    Listado em: Official MCP Registry, npm registry (MCP servers) · Descreve quase a mesma tarefa

  • warp-agent-mcp io.github.warpfreight/warp-agent-mcp

    Quote, book, and track LTL, FTL, cargo van, and box-truck freight via the Warp API.

    de warpfreight · Servidor MCP

    Listado em: Official MCP Registry, npm registry (MCP servers) · Descreve quase a mesma tarefa

  • SendGrid MCP Server

    MCP server for SendGrid's v3 API: email marketing, transactional mail, templates, and analytics.

    de deyikong · Servidor MCP

    Listado em: Official MCP Registry, npm registry (MCP servers) · Descreve quase a mesma tarefa

Encontrados pelo significado, não por código ou repositório em comum: plugins semelhantes continuam sendo produtos distintos, e isto não é uma avaliação nem uma recomendação.

Quer esta marca no seu plugin em nosso catálogo?

Prove que o mantém com um arquivo no repositório, um arquivo no seu domínio ou um registro DNS, e você poderá mostrar esta marca na ficha, com banners ao vivo para o seu site e o README. Como funciona a verificação

Você também recebe alertas quando um marketplace o publica, o remove, muda a marca de verificado ou o que ele pede, e o endpoint remoto passa a ser monitorado como um serviço web.

Dados de Official MCP Registry. Os números vêm das nossas próprias passagens regulares pelos marketplaces, última leitura em . Não publicamos dados de contato dos editores de plugins.

De onde vêm os dados: como o catálogo é montado