# Jev Directory

> Curated directory of SDKs, integrations, MCP servers, agents, demos, and apps on TypeSafe Jev. Find System One tooling fast, with links you can trust.

Canonical site: https://jev.aitools.fyi
Curator: Rishit Patel (@imrishit98) via aitools.fyi
Affiliation: Independent directory. Not TypeSafe AI unless a listing is official.

## What this site is

A curated, link-first index of the public Jev / System One ecosystem: TypeSafe SDKs, Vercel AI Gateway integrations, Jev MCP servers, agent tooling, demos, games, benchmarks, and guides.

Catalog listings (explore index): 488
Detail pages (indexable HTML): 131
Explore-only listings (no on-site detail URL): 357

## Jev spec (facts)

- Model: jev-latest (v1.13)
- Endpoint: POST https://api.typesafe.ai/v1/systemone
- Latency: 70 to 500 ms end to end (per TypeSafe)
- Pricing: $0.042 / MTok input, output free
- Primitives: choice, score, noul

## Key URLs

- Home: https://jev.aitools.fyi/
- Explore all listings: https://jev.aitools.fyi/explore
- Learn hub: https://jev.aitools.fyi/learn
- Submit a listing: https://jev.aitools.fyi/submit
- About / disclaimer: https://jev.aitools.fyi/about
- Sitemap: https://jev.aitools.fyi/sitemap.xml

## Listing detail URLs

Detail pages use category paths, not `/items/`: `/sdks/{slug}`, `/tools/{slug}`, `/apps/{slug}`, `/games/{slug}`, `/benchmarks/{slug}`, `/guides/{slug}`. Explore-only listings link out to the author's site from Explore.

Examples:
- SDK: https://jev.aitools.fyi/sdks/typesafe-ai-typesafe-sdk-js
- Tool: https://jev.aitools.fyi/tools/vercel-eve
- App: https://jev.aitools.fyi/apps/browser-use-jev-ultrafast
- Game: https://jev.aitools.fyi/games/jev-arcade
- Benchmark: https://jev.aitools.fyi/benchmarks/iammrduncan-typesafe-ai-benchmark
- Guide: https://jev.aitools.fyi/guides/yibie-awesome-jev

## Learn guides

- Jev & TypeSafe: https://jev.aitools.fyi/learn/jev-typesafe
- System One model: https://jev.aitools.fyi/learn/system-one
- Jev vs LLM classification: https://jev.aitools.fyi/learn/jev-vs-llm-classification
- Vercel AI Gateway Jev: https://jev.aitools.fyi/learn/vercel-ai-gateway
- Jev use cases: https://jev.aitools.fyi/learn/use-cases

## Categories

- Official: https://jev.aitools.fyi/categories/official
- SDKs and clients: https://jev.aitools.fyi/categories/sdks
- Integrations: https://jev.aitools.fyi/categories/integrations
- Agent tooling: https://jev.aitools.fyi/categories/agent-tooling
- Browser and computer use: https://jev.aitools.fyi/categories/browser-computer-use
- Applications: https://jev.aitools.fyi/categories/applications
- Games and sims: https://jev.aitools.fyi/categories/games
- Playgrounds: https://jev.aitools.fyi/categories/playgrounds
- Benchmarks: https://jev.aitools.fyi/categories/benchmarks
- Guides and lists: https://jev.aitools.fyi/categories/guides

## Collections (filtered explore)

- Best for coding agents: https://jev.aitools.fyi/explore?category=agent-tooling
- MCP servers: https://jev.aitools.fyi/explore?mcp=1
- Browser and computer use: https://jev.aitools.fyi/explore?category=browser-computer-use
- SDKs and clients: https://jev.aitools.fyi/explore?category=sdks
- Games and sims: https://jev.aitools.fyi/explore?category=games
- Live demos: https://jev.aitools.fyi/explore?demo=1

## FAQ

### 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.


## Official TypeSafe links (external)

- TypeSafe: https://typesafe.ai
- Docs: https://docs.typesafe.ai
- Playground: https://console.typesafe.ai/playground
- Vercel AI Gateway Jev: https://vercel.com/docs/ai-gateway/models/jev