UltraContext
Context API for AI agents with automatic versioning and prompt management.
ultracontext.ai
Hey HN! I'm Fabio and I built UltraContext, a simple context API for AI agents with automatic versioning. After two years building AI agents in production, I experienced firsthand how frustrating it is to manage context at scale. Storing messages, iterating system prompts, debugging behavior and multi-agent patterns—all while keeping track of everything without breaking anything. It was driving me insane. So I built UltraContext. The mental model is git for context: - Updates and deletes automatically create versions (history is never lost) - Replay state at any point The API is
Thinking of building something like this?
Every launch here is a competitor to somebody's idea. If yours is close, check it against the market before you build: the Full Check names the rivals, the prices and the gaps.
More developer tool / api launches
AllElevenLabs UI
Audio and agent components for Next.js built on shadcn/UI
What the Font
Identify and discover fonts from images.
Wispbit
Linter that enforces codebase standards with AI coding agents.
OnlyJPG
Private browser-based converter for any image format to JPG.
Scriber Pro
Offline AI transcription app for macOS with no cloud uploads.
Duck-UI
Browser-based SQL IDE for DuckDB running entirely in WebAssembly.
Checked ideas in SaaS & software
AI phone receptionist for small clinics in Canada Kill
A voice AI that answers calls, books appointments and sends reminders for small Canadian physio and dental clinics at C$149 a month.
Browser extension that summarises Terms of Service Kill
Free Chrome extension that turns any site's terms and privacy policy into five plain bullets, with a $4 a month pro plan.
AI bookkeeping assistant for freelance designers Kill
A $19/month app that links a designer's bank and invoicing tools, sorts expenses and prepares quarterly tax estimates.