"Proton Mail" matching MCP servers:

Hosted MCP endpoint (paid) for OpenAI Codex agent coordination, providing structured JSON tools for mail threads, updates, file leasing, and room status receipts.

Provides a mail-like coordination layer for coding agents, enabling them to register identities, exchange messages through inbox/outbox, search threaded history, and declare advisory file reservations to prevent conflicts.

Enables peer-to-peer messaging and coordination between Claude Code sessions via a shared mail server, with tools for roster, ask, dm, inbox, board, and claim.

Enables MCP-capable agents running in separate consoles to exchange direct and broadcast messages through a blocking receive tool that releases instantly when mail arrives, so delivery feels push-like rather than polled. It also provides a live browser dashboard showing message flow, presence and per-agent profiles, plus CLI and HTTP endpoints for sending, tailing and replaying the log.

A mail-like coordination layer for coding agents, providing identities, inbox/outbox, searchable threads, and advisory file reservations to prevent conflicts in multi-agent workflows.

A NATS-backed mailbox for local LLM agents. Provides a simple way for AI coding agents to message and notify each other via a hostable MCP server.

Provides a JSON-RPC MCP server that exposes policy-governed agent tools, including paid tools, tool muxing, and OpenAPI-to-MCP conversion, enabling agents to discover, coordinate, and execute tasks within the ProtoOS ecosystem.

Enables AI agents to send and receive structured, cryptographically-verifiable messages, with tools for inbox management, task delegation, and agent discovery.

Local MCP bridge that lets Codex operate local Claude Code sessions, including listing, starting, resuming, forking, prompting, and stopping conversations via the Remote Control CLI.

MCP server providing tools for entity extraction, query refinement, and relevance checking to build Agentic RAG applications.

Enables Codex to run shadow-mode evidence selection by reading source files, scoring passage relevance with Jev or local Eve models, and returning original text with provisional exclusion decisions.

Extensible MCP server that aggregates multiple backends (email, browser, todoist, etc.) behind a single endpoint, with secure deployment via Cloudflare Tunnel and Workers.

Enables AI agents from different providers to collaborate in shared discussion threads, posting proposals and reviews while retrieving synchronized context, with human oversight.