"Kotlin RAG (Retrieval-Augmented Generation) implementation resources" matching MCP servers:

Enables MCP-compatible clients to securely access and manage Telegram accounts, chats, messages, media, and contacts, with tiered permissions, write controls, and local caching.

A Model Context Protocol (MCP) server implementation that provides Facebook Page interaction and management capabilities. This server enables automated posting, comment moderation, and content retrieval.

Enables interaction with Telegram groups via MTProto, including message retrieval, sending, and semantic search with RAG support.

An extensible MCP hub that exposes internal services (chat, observability, RAG) as namespaced tools via FastMCP, with OpenAPI auto-generation, auth, and resilient error handling.

Discover and connect your agents with other agents via A2A protocol. Share resources for free or fee.

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

MCP server for managing and composing customer replies for a phone and computer repair shop, with built-in templates and WhatsApp link generation. Supports Arabic and English.

Enables an AI assistant to place user-approved phone calls in the callee's language through your own Bland or Twilio account, with language detection, script generation, cost estimates, and safety guard rails. Includes a preview-then-confirm gate, plus call status, transcripts, and summaries.

Enables unified email and attachment reading through a local stdio MCP interface, supporting multiple email accounts, inbox listing, message retrieval, attachment downloads, and full email export.

Enables read-only local search across Telegram chats for Codex and Gemini CLI on macOS, with message retrieval, context, and media previews using a single shared login.

Local-only MCP server that exposes Beeper Texts data (messages, chats, contacts) from the macOS Beeper Desktop SQLite database for AI assistants and automation tools, supporting search and media retrieval across multiple platforms.

Enables compatible AI assistants to operate Linux WeChat through local stdio, including contact and group search, bounded message history retrieval, private and group text sending, shared service lifecycle management, capability discovery, and persistent idempotent deduplication.

Enables MCP-capable clients to query a locally captured Discord archive through structured tools such as recent messages, substring search, status, server/channel listings, media retrieval, and sandboxed jsonl/markdown export. It also exposes browser-driven capture and media re-download operations that run as serialized background jobs.

Enables interaction with QQ through official bot APIs or personal accounts bridged via NapCat/OneBot v11, including status checks, target listing, bounded context retrieval, and plain-text sending to allowlisted conversations.

Enables AI agents to securely access and search enterprise WeChat (WeCom) chat records with full decryption and auditing, supporting message retrieval, decryption, local storage, and querying via MCP tools.

Enables a local AI agent to read, search, compose, send, and organize mail in a home.pl mailbox over encrypted IMAP and SMTP, with credentials held in the OS credential store and a one-time private local setup form. Supports folder and history browsing, message metadata, bodies, byte-preserving .eml retrieval, attachment downloads, drafts, and flag/move/copy/trash operations.

Official remote MCP server for Lobby, the bilingual AI receptionist. Five free no-auth tools: business phone scripts and IVR menus (English + Mexican Spanish), ElevenLabs agent system prompts, missed-call cost math, and a hire-a-receptionist verdict.

Enables sending web push notifications and managing Pushpad resources (notifications, subscriptions, projects, and senders) through natural language, using the Pushpad API.

A server implementing Model Context Protocol that enables AI assistants to interact with Slack API through a standardized interface, providing tools for messaging, channel management, user information retrieval, and more.

MCP server for the Gong API, enabling search and retrieval of calls, transcripts, attendees, next steps, and more.