aitools.fyi picks · 488 listings · 131 deep dives
The sharpest map of Jev tools
Find SDKs, gateway hooks, MCP servers, agent routers, demos, and weird games built on TypeSafe's System One model. Real links, real repos, zero chatbot filler.
488
Listings
131
Deep dives
357
Card-only
10
Categories
139
With demo
408
GitHub repos
Primitives
choice
Pick one option from a list
choice, probabilities, confidence
score
Rate state on a rubric
score, probabilities, confidence
noul
Is this statement true?
noul (0 to 1)
Staff picks
Featured this week
Collections
Shortcuts that actually save time
Best for coding agents
Routers, compaction, MCP, guards. The stuff you bolt onto Claude Code before it goes feral.
BrowseMCP servers
Typed judgments as tools. For when your agent needs a verdict, not another paragraph.
BrowseBrowser and computer use
Ultrafast clicks, voice browsers, OCR loops. Jev picks the action, not the essay.
BrowseSDKs and clients
Official TypeScript and Python plus the community long tail in every language.
BrowseGames and sims
Doom, Mario, chess, wikiracing. Proof that decisions beat dialogue.
BrowseLive demos
Try before you npm install. Filtered to listings with a live URL.
BrowseBrowse by job
Categories
SDKs, MCP, browser agents, games, benchmarks, and the rest. Pick a lane, then filter hard on Explore.
Official
TypeSafe docs, SDKs, playground, and repos they actually maintain.
SDKs and clients
Official JS and Python plus community ports. Typed questions in, probabilities out.
Integrations
Vercel AI Gateway, eve, LangChain, Postgres, Home Assistant, n8n, and platform glue.
Agent tooling
Routers, MCP servers, compaction, review gates, guards, and skills for coding agents.
Browser and computer use
Ultrafast browser agents, extensions, voice control, and desktop automation.
Applications
Shipped products: trading, moderation, analytics, triage, RAG verify, support pipelines.
Games and sims
Doom, Mario, chess, wikiracing, and sims where Jev picks the next move.
Playgrounds
Interactive demos and sandboxes for Choice, Score, and Noul in the browser.
Benchmarks
Evals, open replicas, calibration studies, and comparison harnesses.
Guides and lists
Launch posts, how-tos, essays, awesome lists, and community write-ups.
Primer
Why Jev beats another LLM call
Jev is TypeSafe's System One decision model. You send structured state plus typed questions (Choice, Score, Noul). You get calibrated probabilities, not a motivational essay. Your code sets thresholds. Your app runs the side effects.
FAQ
Jev questions, answered fast
Short, quotable facts for humans and search crawlers. Go deeper on Learn.
- What is Jev?
- Jev is TypeSafe AI's System One decision model for software. You send structured state and typed questions (Choice, Score, or Noul). The API returns discrete answers with probabilities and confidence. Your code applies thresholds and runs side effects.
- How is Jev different from an LLM?
- LLMs generate open-ended text. Jev answers fixed questions with explicit probability mass over options. That makes routing, moderation, and safety gates easier than parsing YES or NO from chat output.
- How do I try Jev on Vercel AI Gateway?
- Use model id typesafe-ai/jev through Vercel AI Gateway with the AI SDK, including experimental_evaluate flows. See Vercel's gateway docs and the eve agent framework for TypeScript examples.
- What is this directory?
- Jev Directory at jev.aitools.fyi is an independent index of SDKs, integrations, Jev MCP servers, demos, and apps. The explore index lists the full public catalog; only stronger listings get on-site detail pages under paths like /sdks/ and /tools/. Published by aitools.fyi. Not affiliated with TypeSafe AI unless a listing is official.
Shipping with Jev?
Send the repo or demo. We actually click the links. Star counts stay honest or they stay blank.