Gauge

Gauge

Made by Seaynic Labs. Need tools like this built around your own systems? We do that.

Gauge lets an AI assistant read your website's Umami analytics and send email through Resend, and comes with skills that teach it to do that work well: weekly reports, copy, SEO and email.

It is a bundle: tools, skills and instructions in one install. The tools are one server made of modules. You switch on the modules you use. New modules arrive switched off, so an update never changes what your assistant can do until you choose to.

Gauge works with any MCP client: Claude Desktop, Claude Code, Cursor, VS Code, Sonique, Hermes, OpenClaw and others. It runs on your computer and stores nothing; your data stays in Umami and Resend.

Skills

Skills are short guides your assistant reads before doing a job. Gauge ships 9, in two forms from one source: a skills/ folder for apps that read Agent Skills (Claude Code and others), and MCP prompts for every other MCP app.

Third-party skills keep their licenses; see CREDITS.md.

Install

Gauge needs Python 3.11 or newer. With uv you don't install anything ahead of time:

uvx gauge-mcp --versionuvx gauge-mcp --doctor          # checks your settings and connections, prints fixes

Pin the exact version if you want updates only when you choose them: uvx gauge-mcp==0.2.1.

Or with pip:

pip install gauge-mcp

As a Claude Code plugin (tools and skills in one step):

/plugin marketplace add seayniclabs/plugins/plugin install gauge@seayniclabs

Plugin users put settings in ~/.config/gauge/config.toml (below).

Settings

Set these as environment variables in your MCP client's config, or put them in a config file (see below). You only need the settings for the modules you use. Gauge starts without any of them and tells you what's missing when you call a tool.

Config file (optional). Gauge also reads ~/.config/gauge/config.toml, or the file named by GAUGE_CONFIG. Environment variables win over the file.

[umami]url = "https://analytics.example.com"username = "viewer"password = "change-me"
[resend]enabled = false

Add it to your MCP client

Most clients use the same JSON shape. Put it where your client keeps MCP servers:

{  "mcpServers": {    "gauge": {      "command": "uvx",      "args": ["gauge-mcp"],      "env": {        "GAUGE_UMAMI_URL": "https://analytics.example.com",        "GAUGE_UMAMI_USERNAME": "viewer",        "GAUGE_UMAMI_PASSWORD": "change-me",        "GAUGE_RESEND_API_KEY": "re_your_key",        "GAUGE_RESEND_FROM": "[email protected]"      }    }  }}

Over HTTP. For clients that connect to a URL instead of launching a process:

gauge-mcp --transport http --port 8765

It serves streamable HTTP at http://127.0.0.1:8765/mcp. It listens only on your own machine by default. Put authentication in front of it before exposing it anywhere else.

Try these

Paste one into your assistant once Gauge is set up:

1. "How did my site do last week compared with the week before?"
2. "Which pages got the most visits this month, and where did those visitors come from?"
3. "Write my weekly site report and draft it as an email to me. Don't send it yet."
4. "Audit the SEO of my top three pages and suggest new titles and descriptions."
5. "Which of my Resend sending domains aren't verified yet, and what do I need to fix?"

Tools

Every tool returns structured data with a published schema, so an assistant can write code against the results instead of reading text. Date ranges take days (default 7) or ISO 8601 start and end. Errors always look like gauge.<module>.<code>: <message> Fix: <hint>.

Safety

• Gauge only calls the services you configure. It sends nothing anywhere else and keeps no data.
• resend_send sends real email, so you approve each one, not the assistant. When the assistant asks to send, Gauge asks you directly through your MCP client (MCP elicitation) and shows the sender, recipients and subject. The assistant can't answer that question for you.
• Some MCP clients can't ask you questions yet. In those, Gauge refuses to send unless you've pre-approved the recipients with GAUGE_RESEND_ALLOWED_RECIPIENTS, or turned approval off with GAUGE_RESEND_REQUIRE_CONFIRM=false.
• Give Gauge the least access it needs: a view-only Umami user, and a Resend key limited to sending if you don't need the other email tools.

Develop

uv venv && uv pip install -e '.[dev]'.venv/bin/pytest

Security

Report a vulnerability privately through GitHub (Security tab, "Report a vulnerability"). See SECURITY.md. Every send you approve, decline or that gets refused is logged locally in ~/.local/state/gauge/approvals.jsonl (recipients and subject, never the message body). Set GAUGE_APPROVAL_LOG to move it.

License

MIT. Published by Seaynic Labs. Third-party skills are credited in CREDITS.md and keep their own licenses.

Built by Seaynic Labs. We build tools like this around a business's own systems: local-first, with a person approving every change. See custom integrations.