Feedhammer merges Basecamp project calendars into shareable iCal feeds for clients and teams. Plans start at $12/month with a 7-day free trial.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
Feedhammer is a web service that merges the calendar feeds of Basecamp projects into unified iCal feeds. Every Basecamp project produces its own calendar feed, so a client involved in four projects would normally need four separate subscriptions. Feedhammer combines them into one link that any calendar app can subscribe to.
The product is aimed at freelancers and agencies that run client work in Basecamp. Its homepage describes the gap it fills: Basecamp knows the plan, but the client's calendar does not. Feedhammer carries Basecamp dates into Google Calendar, Outlook, or Apple Calendar without asking the client to open Basecamp or create a Feedhammer account.
A user signs in with Google, creates a feed group, and pastes in Basecamp iCal URLs. Each group gets its own permanent feed URL, and toggles decide whether meetings, to-dos, and cards appear. The user then shares the URL, and the recipient pastes it into a calendar app once.
Feedhammer is read-only and does not poll Basecamp continuously. It fetches fresh data when a calendar app requests the feed, so update speed depends on the app. Google Calendar typically refreshes every 5 to 8 hours, Outlook about once a day, and Apple Calendar and Thunderbird follow the user's refresh settings.
The central feature is per-group event filtering. Each feed group can show meetings, to-dos, and card table items with due dates, and emoji or text prefixes help tell them apart. Groups can combine projects from several Basecamp workspaces, and the plan comparison also lists meeting link extraction for Zoom, Meet, and Teams.
Management tools include regenerating or revoking feed URLs, duplicating groups, searching and sorting, and status dots that show whether each feed synced. Pro adds bulk regeneration and deletion, JSON export and import, shared team access, and a custom calendar name so clients see an agency brand in Google Calendar.
Feedhammer is a web service that merges the iCal feeds from Basecamp projects into unified, shareable calendar feeds. Users create feed groups and share one URL per audience. The URL works in Google Calendar, Outlook, Apple Calendar, and other calendar apps.
Starter costs $12 per month and allows up to 10 feed groups. Pro costs $29 per month and offers unlimited groups, bulk operations, export and import, three team seats, and a custom calendar name.
Yes. Both plans include a 7-day free trial with full access. If the user does not cancel before the trial ends, the card is automatically charged for the selected plan.
No. The client only receives a feed URL and pastes it into their calendar app. One URL can be shared with any number of people, with no per-person limit or separate login.
Updates appear when the calendar app next checks the feed. Google Calendar typically refreshes every 5 to 8 hours and Outlook roughly once a day. Apple Calendar and Thunderbird follow the user's refresh settings.
No. Feedhammer is a read-only middleman, and data flows only from Basecamp to Feedhammer to the calendar. It cannot edit anything in Basecamp.
Yes. A feed group accepts iCal URLs from any Basecamp workspace, and the sources state no restriction on accounts or workspaces. This suits agencies that work inside several client Basecamp accounts.
The feed URLs stop serving data, and anyone subscribed sees an empty calendar. The site advises warning clients before canceling so they can remove the subscription cleanly.