Timebook (squidcode/timebook-cli) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 12 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Caution
74/100

Timebook

Official MCP server for Timebook (usetimebook.com) — time tracking, invoicing, and bookkeeping for freelancers and solo LLCs. Manage clients and projects, start/stop timers, and log, update, and delete time entries. Stdio via the @squidcode/timebook npm CLI; a hosted OAuth endpoint also exists at https://usetimebook.com/mcp.

→ squidcode/timebook-cli· listed on glama

Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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Who stands behind it

squidcode

Source: Glama

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Install from

Glamanot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
⚠️
Known vulnerabilities in dependencies: 1 high
Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
✅
Open source with a license and README
Anyone can audit the code, the license is declared, and the publisher documents what it does.
// tools this server exposes12 tools

These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.

whoami

Return the currently authenticated Timebook user (id, email, name).

list_projects

List all projects available to the current token. Returns id, name, and client for each project.

list_clients

List all clients available to the current token.

get_active_timer

Return the currently running timer (project, description, started_at), or null if no timer is running.

start_timer

Start a timer on a project. Stops any other running timer first — Timebook allows only one active timer at a time.

stop_timer

Stop the currently running timer. Returns { stopped: false } if no timer was running.

log_time

Log a manual (past) time entry. Provide either `duration` (relative to now), or both `startTime` and `endTime` (absolute ISO-8601 timestamps).

list_entries
update_entry

Edit one or more fields on an existing time entry. Any combination is valid; unset fields are left as-is. Server-enforced authorship rule: this token can only edit entries it created itself (sessions and admins bypass).

delete_entry

Delete a time entry. Server enforces: not invoiced, and either this token created it or the caller is an admin / web session.

create_client

Create a client (the person/company you bill). Needed before any project or time entry can exist. Typical first step on a fresh account.

create_project

Create a project under a client. Time entries are always tracked against a project. Typical second step on a fresh account, after create_client.

// known CVEs in dependencies1 high

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@modelcontextprotocol/sdk@1.0.4GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

Depend on this server? Get alerted when its CVEs change.Watch this server free →
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configTIMEBOOK_API_URL
configTIMEBOOK_WEB_URL
// quality suggestions

All four hints declared on every tool

5/12 tools missing one or more hints — whoami (missing: destructiveHint); list_projects (missing: destructiveHint); list_clients (missing: destructiveHint), +2 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Tool test coverage

6/12 tools referenced in tests (50%)

Write tests that reference each tool by name so every tool has at least one test.

Production dependencies are patched

0 critical, 1 high severity in production deps — @modelcontextprotocol/sdk@1.0.4 (high)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 3 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Verified](https://m8ven.ai/badge/mcp/squidcode/timebook-cli?variant=verified)](https://m8ven.ai/mcp/squidcode/timebook-cli)
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commit: d2416f1b4f8a2b54fd802cd52c7f7831ad5a51bc
code hash: 39225e59e47c507d29e48af4e4a85a5512fe362eada63a90f24d3c14eee88ef5
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