Monitoring and observability · MCP server
Tallybook: MCP server, setup and security
Tallybook is an open-source MCP server published on GitHub that lets an AI agent analyze Claude Code and Codex spending by session and model. Its repository has 5 stars and its last commit is from September 13, 2026 and it is licensed under MIT.
What Tallybook does
According to its repository: “Local cost tracking for Claude Code and Codex sessions: spend by session, sub-agent and model, week-on-week comparisons, and findings with suggested patches.”
The Model Context Protocol (MCP) is a standard plug between an AI agent and an outside service: once the server is connected, its tools show up in the agent, which decides when to call them. Tallybook is listed under Monitoring and observability, a category of 57 servers in the directory, where it ranks #51 by stars.
Topics declared by the repository: ai-agents, anthropic, claude-code, cli, codex, coding-agents.
Installing and connecting Tallybook
No package or remote server is declared in the official MCP registry: you install it from source, following the repository README.
It works with any MCP-compatible client (Claude Desktop, Claude Code, Cursor, VS Code, Codex and most recent agents). You add one entry to the client's MCP configuration: server name, start command or URL, environment variables. Project language: Go. Listed systems: macOS, Windows, Linux.
Security: what to check
Connecting an MCP server means installing software that talks straight to your agent: it runs with your rights and the model trusts its tool descriptions. The risk therefore depends on what it can touch and how far its code can be trusted.
None of the risk signals we track (system access, secrets, missing licence, abandonment) applies to Tallybook. That does not replace reading the code.
Good practice: grant only the rights needed (least privilege), require human approval for irreversible actions, and run the AI agent security check.
Project activity and maintenance
Created on September 10, 2026, the magna-nz/tallybook repository has 5 stars and 0 forks, with 0 open issues. It has more stars than 13% of the servers in the directory. Last change 1 month ago.
Stars measure attention, not quality: a recent, heavily promoted project can collect them fast, while a useful but niche server will have few.
Verdict
Tallybook is still a modest project: read its code and compare it with the alternatives before using it.
Strengths
- Active project: recent commit
- Permissive licence (MIT)
Limitations
- Few visible users
- Install from source
Alternatives
- Netdata81.1K ★
- MCP grafana3.6K ★
- Openstatus9.2K ★
- OneUptime7.8K ★
- Homebutler305 ★
- SolidPing26 ★
Learn more
Frequently asked questions
How do I install Tallybook?
No package is declared in the MCP registry: clone the magna-nz/tallybook repository, follow its README, then declare the start command in your client's MCP configuration.
Is Tallybook free?
The code is published under the MIT licence and can be used free of charge.
Is Tallybook safe?
No risk signal found (system access, secrets, licence, abandonment). As with any MCP server, keep rights minimal and read the code before sensitive use.
Is it an official server?
Nothing says so: it is a project published by magna-nz on GitHub. Check who maintains it before giving it access.
What are the alternatives to Tallybook?
In the same category: Netdata, MCP grafana, Openstatus, and OneUptime. Netdata and MCP grafana score higher on our grid.
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Neutrality. No affiliate links. No vendor pays to be reviewed, rated or ranked. Reviews are directed by François Chollet, neutral and factual, and every data point is dated and sourced. How we score