37signals is making Basecamp agent-accessible via MCP, allowing AI agents to perform any action a human user can — creating to-do lists, posting messages, uploading files, and scheduling projects. DHH argues that agents represent the killer app for AI, and that broad adoption will come not from developer tools like Claude Code but from mainstream interfaces like ChatGPT and Gemini incorporating personal assistant agents. Basecamp is the first 37signals product to get this treatment, with Fizzy and HEY to follow.
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