Posthaste

theoryzhenkov4stars

Local-first mail client your scripts and AI agents can actually use — an MCP server + rules engine over Gmail, JMAP & IMAP. Built in Rust. (Beta)

Communication

Install Run on PlugMCP

GitHub Website

Run on PlugMCP

1# Posthaste

README.mdMCP server

Transport: stdio
Status: Local

Power your agent

Add this server

Install from the publisher. Not a PlugMCP endpoint.

Run on PlugMCP

Host a copy with our keys and logs.

No packaged release in the registry yet. Follow the repository README.

RepositoryPublisher installStep-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Server facts

Local

Transport: stdio
License: MIT
Last checked: 2026-10-28

Stars: 4
Tools: —
Uptime: —

Tools

No tool list yet. Remote servers get one after the first health check.

FAQ

Questions

How do I install Posthaste?

Copy the stdio config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Posthaste need an API key?

No required environment variable is listed on this record.

What transport does Posthaste use?

Posthaste runs locally over stdio.

When was Posthaste last checked?

Last checked 2026-10-28. Local-first mail client your scripts and AI agents can actually use — an MCP server + rules engine over Gmail, JMAP & IMAP. Built in Rust. (Beta)

From the publisher

Documentation

Posthaste

Your mail, delivered at Posthaste

Posthaste is a fast & smart local email workstation. Posthaste adapts to your workflow, whenever you want smart command palette, custom scripting, MCP server, themes, integrations with your personal tools, and other things.

posthaste.theor.net

Install

Download a build for your platform from the releases page or posthaste.theor.net:

macOS — signed and notarized .dmg.
Windows — NSIS .exe installer.
Linux — .AppImage;

Nightly and stable ship as separate apps.

Build from source

Posthaste is a Rust workspace (backend: a domain service over a SQLite store with JMAP/IMAP providers) plus a TypeScript/Tauri frontend. See Cargo.toml, package.json, and flake.nix at the repo root for the toolchain, and justfile for the common dev commands (just lists them).

Docs

Full documentation lives at posthaste.theor.net/docs.

Contributing

Posthaste is open source and takes issues and PRs on GitHub. Join the Discord to discuss features or get help.

License

MIT — see LICENSE.