Who it is for
Solo practitioners and small teams that bill hourly and log time as work happens.
Timebook
Billable time tracking for solo work and small teams
Overview
What Timebook does
Timebook records billable work for independent professionals and small teams, with clients and projects organized inside it. From ChatGPT, the connector lists clients and projects, starts and stops a timer, logs work done in the past, and shows recent entries.
Existing entries can be changed or removed, but only within whatever the connected assistant has been permitted to modify. That boundary is stated in the record without further detail. Squidcode LLC publishes it. Nothing in the entry covers invoicing, hourly rates, exports, or reporting, so the described scope stays on capturing and correcting time rather than what happens to it afterwards.
What stands out
Editing and deleting entries is bounded by explicit permission rather than open by default.
Availability
Where Timebook is listed
Timebook is listed in the ChatGPT apps directory only. Squidcode LLC has no connector under the same domain in the Claude directory; 392 of the 3,150 products here are on both marketplaces, and this is not one of them.
ChatGPT apps are built on MCP, and the same server can back a Claude connector, so the absence is a distribution decision rather than a technical one.
ChatGPT listing
In the ChatGPT apps directory
- Developer
- Squidcode LLC
- Filed under
- Productivity
- Listed since
- June 2026
- Authentication
- Authenticates when installed
- Website
- usetimebook.com
- Policies published
- Privacy policy · Terms of service
- Official listing
- Open in ChatGPT
- Snapshot
- August 2026
Nearby
Other Productivity connectors
Temponia
Calendar style time tracking and timesheets
ChatGPT
Agiflow
Project and task tracking through chat commands
ChatGPT
Owll
Read-only search across an Owll note library
ChatGPT
Pagos
BIN lookups and harmonised payments analytics from Pagos
Claude
Parallel
Read-only access to a Parallel financial model
Claude · ChatGPT
Patent Literature Search OAuth
Combined patent and scientific literature search
ChatGPT
This is an independent catalogue entry compiled by Node8 from Timebook's public marketplace listing as it stood in August 2026. Listing facts come from the marketplaces; the comparisons against the rest of the directory and any live-endpoint measurements are Node8's. Node8 is not affiliated with Squidcode LLC, and inclusion here is not an endorsement.
Want your company reachable inside ChatGPT and Claude?
Node8 builds MCP servers end to end: deciding which tools are worth exposing, the authentication and permission model, the review submissions, and the onboarding that gets them used. One server serves ChatGPT, Claude, and Microsoft Copilot.