Hqbase MCP Server

Your team's email workspace. On your infrastructure. An open-source shared email workspace that runs in your Cloudflare account and keeps mail and credentials in infrastructure you control. It is available as a remote MCP endpoint.

Teams that work with agpl, cloudflare workers and email and want a hosted endpoint instead of running a local process. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-12 · ★ 326 · #34 OF 90 MAINTAINED EMAIL · VERIFIED 2026-09-18

AGPL-3.0 · TypeScript servers · how we verify → /methodology

01 · Install Hqbase

Claude Code

claude mcp add hqbase-hqbase --transport http https://{installation_domain}/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "hqbase-hqbase": {
      "url": "https://{installation_domain}/mcp"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://{installation_domain}/mcp

transport: streamable-http

endpoint NOT responding · probed 2026-09-18

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as remote - your agent's requests go to {installation_domain}

repo age created 2026-08-08 - young repo, little track record yet

license AGPL-3.0 - declared in the repository

registry namespace io.github.HQBase is GitHub-verified and matches the repo owner

03 · What Hqbase can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v1.4.0 · 2026-09-06

New · Add owner-controlled Nightly updates. Stable remains the default. Turning Nightly off keeps the · installed version until Stable catches up. · Publish signed Nightly candidates and promote the same tested archive…

v1.3.4 · 2026-09-01

Fixed · Start managed updates with a short Workers Builds deploy command and a verified updater-loader · variable. This prevents the Invalid request body failure after HQBase 1.3.4 is installed and · does not change…

v1.3.3 · 2026-09-01

Fixed · Repair installations that reached HQBase 1.3 without completing the signed post-deploy database · phase. This fixes connection loading errors while preserving mail, drafts, labels, grants, and · other workspace…

04 · Who maintains Hqbase

HQBase is maintained by hqbase. It's the only MCP server we track from this author; the repo dates to Aug 2026.

05 · Facts

repository: github.com/hqbase/hqbase
website: https://hqbase.io/docs/mcp/
category: email - ranked #34 of 90 actively-maintained email servers as of 2026-09-18.
release cadence: 7 releases in the last 90 days (latest 2026-09-06)
registry: io.github.HQBase/hqbase (active, first published 2026-08-22)

06 · Hqbase FAQ

What is Hqbase?

Is Hqbase still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-12 and it shipped 7 releases in the last 90 days. We re-verify nightly.

How do I install Hqbase?

Run `claude mcp add hqbase-hqbase --transport http https://{installation_domain}/mcp`. You can also paste the ready-made client config above.

07 · Alternatives to Hqbase

Alternatives to Hqbase

Maintained email servers if Hqbase isn't the fit.

More email MCP servers · Grad Agent · Apple Mail MCP (imdinu) · Aruba Email & Calendar · Apple Mail MCP (jayvee6) · Mailbox MCP

More TypeScript MCP servers · Agent Scrape · Share · Httpayer MCP Server · Feishu Markdown MCP · Reunion · see all