Basecamp API
Basecamp 4 has a mature public REST API, JSON-only and documented on GitHub, with OAuth 2.0 as the only auth path. Roughly 50 endpoint families cover projects, to-dos, messages, chat, schedules, and files. Rate limiting is 50 requests per 10 seconds per token, and SDKs are community-built.
Frequently asked questions
Basecamp scores A on Supergood's API Report Card. Basecamp 4 has a mature public REST API, JSON-only and documented on GitHub, with OAuth 2.0 as the only auth path. Roughly 50 endpoint families cover projects, to-dos, messages, chat, schedules, and files. Rate limiting is 50 requests per 10 seconds per token, and SDKs are community-built.
Basecamp has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
Basecamp is the flagship project management and team collaboration product from 37signals, the Chicago-based bootstrapped software company founded in 1999 by Jason Fried and David Heinemeier Hansson (creator of Ruby on Rails, which was extracted from Basecamp's codebase).
Vertical: misc (horizontal team collaboration; cuts across every Supergood vertical with no specific industry tilt). Sub-vertical: Project Management & Team Collaboration. Project-centric workspaces grouping to-dos, messages, files, schedules, and docs into a single 'project' container.
Medium-high, 6/10.
Owner: 37signals (privately held, no outside investors); HQ Chicago, IL. Founders: Jason Fried (CEO), David Heinemeier Hansson (CTO; creator of Ruby on Rails). Founded: 37signals 1999; Basecamp product 2004; current version Basecamp 4 (2019).
Founded in 1999 as 37signals (originally a web design consultancy); Basecamp launched in 2004 as the first product. The company famously rebranded entirely to 'Basecamp' from 2014–2022 before reverting to '37signals' as the parent brand.
Supergood's grades measure one thing: can a customer's engineering team get their own data out programmatically? Supergood checks six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and rolls them into a letter grade. Supergood re-verifies grades, and they only move on evidence.
Basecamp has partial MCP support. 37signals has not shipped an official MCP server, choosing instead to make Basecamp agent accessible through a revamped API, a CLI, and an agent skill. Multiple maintained community MCP servers wrap the Basecamp API and the vendor has not disputed them.
Partially. MCP support for Basecamp exists but is incomplete, so what MCP clients like Claude, Cursor, and Codex can reach depends on what the available server covers.