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TypeSafe JavaScript SDK
TypeSafe AIOfficial
The official JavaScript and TypeScript client, with answer types inferred from your questions.
TypeSafe Jev SDKs and API clients
Compare official TypeSafe SDKs and community Jev clients by language and source. Check authentication, supported question types and release activity before integrating the API.
Public projects, checked against their original sources.
TypeSafe Python SDK
TypeSafe AIOfficial
Official synchronous and asynchronous Python clients for Choice, Score, and Noul questions.
TypeSafe Rust SDK
gilljon
A community Rust client with async and blocking APIs, typed answers, and configurable retries.
typesafe-go
cole-gillespie
An independent Go SDK with question constructors, typed answer accessors, and context support.
System One Adapter
TypeSafe AIOfficial
Run System One-shaped evaluations through other model APIs to build comparisons with Jev.
Zod Jev
jomatsu
Combine Zod shape validation with Jev semantic checks.
TypeSafeAI for .NET
Hawxy
Typed System One clients and Microsoft.Extensions.AI adapters for .NET.
TypeSafe Swift SDK
InsaneArts
Call TypeSafe with inferred answer types from Swift applications.
ZIO TypeSafe AI
jamesward
Use named tuples for typed Jev questions and answers in Scala.
TypeSafe for Elixir
mattneel
Ask batched Choice, Noul, and Score questions from Elixir.
TypeSafe PHP SDK
valksor
A strictly typed PHP client with configurable transport and retries.
TypeSafe Zig
mattneel
Infer Jev answer types from the questions defined in Zig.
TypeSafe Ruby SDK
joshmn
A Ruby client for direct access to the System One API.
Jevgo
fgn
A Go System One client with optional Langfuse instrumentation.
Decido
yairshy
Build typed decision workflows with Jev or a custom provider.
Jod
mateonunez
Bind a validated state schema and Jev questions into one typed artifact.
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jev-java
gudcks0305
Source description: Unofficial Java SDK for TypeSafe Jev and Vercel AI Gateway, with Spring Boot and WebClient support
jev4s
maxtrezzi
Source description: Typed Scala client for Jev (TypeSafe AI): typed questions, typed answers, errors as values. Scala 3.9 and 2.13, Spark 4 ready.
jev4k
pambrose
Source description: A Kotlin Multiplatform DSL and client for TypeSafe's Jev model
JevSwiftSDK
NSStudent
Source description: An independent, type-safe Swift SDK for TypeSafe Jev, with async/await, batching, retries, and SPM support.
typesafe-sdk-go
atharvamhaske
Source description: unofficial go sdk for typesafe ai. not affiliated with or endorsed by typesafe ai. a side project built to fill the missing go sdk gap, for the community to use.
jev-go-sdk
ajayk
Source description: Dependency-free Go client for TypeSafe AI's System One API and the Jev model
JevLang
TimMikeladze
Source description: A policy engine for LLM decisions: declare routes, gates and actions once in TypeScript or Python, and every decision comes validated, explainable, replayable and audited.
jev-typesafe-dotnet
mehdihadeli
Source description: .Net SDK for the TypeSafe Jev API
jev-cli
portlandhodl
Source description: Agent-facing command line for Jev, TypeSafe AI's System One model: ask typed questions, get calibrated probabilities. Unofficial, built on jev-sdk.
guideme-python
pedro-pscunha
Source description: Type-safe inline judgments from TypeSafe Jev, for Python
typesafe-sdk-go
valksor
Source description: Unofficial Go SDK for the TypeSafe AI System One API — 1:1 parity with the official JS and Python SDKs. Not affiliated with TypeSafe AI.
TypeSafeAI
tryAGI
Source description: First-class, NativeAOT-ready .NET SDK for TypeSafe AI System One, generated with AutoSDK.
Source description: Async Rust SDK for decision models served through the System One API, with an adapter for OpenAI, Anthropic and Gemini models. Ports of typesafe-sdk-python and system-one-adapter-python.
TypeSafe.Jev
RavenValentin
Source description: Typed AI decisions for .NET: ask Jev (TypeSafe AI System One) yes/no, choice and score questions and get a C# enum with calibrated probabilities back.
typesafeai-go
chez-shanpu
Source description: Go SDK for TypeSafe AI API https://docs.typesafe.ai/api
jev-state
suranjaychandra
Source description: Turn raw app and game state into state Jev reads well. Benchmark: 74% → 100% accuracy, 43% fewer tokens.
typesafe_ai
typesend
Source description: Typed Elixir client for TypeSafe AI and its Jev System One model, with offline test stubs, concurrent fan-out, and atom-keyed answers.
jev.zig
jakeknowlton
Source description: An unofficial Zig client for the TypeSafe System One API (Jev)
jevextract
gabazureus
Source description: Grounded information extraction that cannot hallucinate: code proposes spans, Jev decides. An open-source alternative to LangExtract, with a bilingual benchmark and paper.
kunobi-decision
kunobi-ninja
Source description: Rust client for the TypeSafe System One API (Jev)
typesafe-sdk-go
unimtx
Source description: A Go SDK for the TypeSafe API, enabling quick integration with Jev.
typesafe-sdk-ruby
afurm
Source description: Unofficial Ruby SDK for the TypeSafe AI API (Jev model) - typed questions, retries, and typed errors. Community port of typesafe-sdk-js.
jev-use-cases
Quintui
Source description: Demo app: Jev (TypeSafe System One) use cases with the AI SDK and shadcn/ui
json-renderer
Quintui
Source description: Generative UI two ways: json-render with an LLM vs Jev (TypeSafe System One), via the AI SDK and OpenRouter
typesafe-dotnet
sanamhub
Source description: Unofficial .NET client for the TypeSafe AI System One API
decisionkit-dotnet
iamjonatha
Source description: Provider-independent, strongly typed decision and evaluation model for .NET. TypeSafe JEV is the first provider.
SystemOneSharp
pinkroosterai
Source description: A .NET client for the System One API used by Jev and compatible Laya servers
jev
stefafafan
Source description: An unofficial, provider-neutral Unix client for Jev from TypeSafe AI. Written in Go.
typesafe-client
haileyok
Source description: Unofficial Go and Rust clients for the TypeSafe AI System One API (Jev)
hunch
steven-shoemaker
Source description: Ask Jev over columns of data: closed-set questions, cached and joined back.
ex_typesafe_ai
iamtalha-arshad
Source description: Unofficial Elixir client for the TypeSafe AI API — typed structs, Req-based HTTP with retries, and ergonomic noul/choice/score questions. Not affiliated with TypeSafe AI.
omarchy-mail
petrzpav
Source description: Terminal Gmail client for Omarchy. Jev (TypeSafe AI) files your inbox into Gmail labels and checks your replies as you write
tinystruct-typesafe-sdk
tinystruct
Source description: A tinystruct-based TypeSafe SDK with JEV model.
typesafe_sdk_ex
vinnie357
Source description: Typesafe AI SDK in Elixir using Req
typesafe-client
JedimEmO
Source description: Unofficial typed async Rust client for the TypeSafe System One API
typesafe-rs
AbdelStark
Source description: Latency-first Rust SDK for TypeSafe System One.
typesafe-sdk
binnash
Source description: PHP & Laravel SDK for TypeSafe AI's JEV Model series
jev
kataras
Source description: A Go client for the TypeSafe AI's System One API and its model, Jev.
jev-go
guillemus
Source description: Unofficial Go SDK for TypeSafe AI's Jev API
jev-go
kyledickey
Source description: TypeSafe.ai Jev Go SDK
jev-harness-router
JoacoMarc
Source description: Per-turn router for agent harnesses: one 350ms Jev call picks the model tier, effort, tools and skill, behind a hard deadline with a regex fallback. Claude Agent SDK adapter included.
qualm
qddegtya
Source description: Typed decisions from a System One model, where uncertainty is something you have to handle.
jev-net
brightshore
Source description: A lightweight .NET client for the TypeSafe AI API (System One / Jev). One dependency; a faithful port of the official Python SDK.
jev-php-sdk
mzainzulifqar
Source description: PHP SDK for TypeSafe's Jev: send text and typed questions, get typed answers with calibrated confidence. PHP 8.1+, works with any PSR-18 client, Laravel 8–13.
jev-sdk-java
luigivis
Source description: Type-safe Java 21 client for the TypeSafe AI Jev (System One) decision API
jevclient
AboveColin
Source description: Async Python client for TypeSafe Jev. Typed questions in, probabilities and choices out, no prose to parse.
typesafe-go
zhirschtritt
Source description: Idiomatic Go SDK for the TypeSafe AI API
SystemOneDotNet
JabbaKadabra
Source description: .NET client for TypeSafe System One (Jev) — typed questions in, typed answers with probabilities and confidence out. No prompt engineering, no output parsing.
typesafe-jev-bridge
RevocGG
Source description: Use the TypeSafe Jev decision model (System One) anywhere: zero-dependency OpenAI-compatible bridge for 9Router, Claude Code, Cursor, Cline & any OpenAI SDK. Typed yes/no, choice & score judgments via CLI or HTTP.
typesafe-sdk-dotnet
hardkoded
Source description: Unofficial .NET port of the TypeSafe AI client SDK (typed questions & answers)
typesafe-sdk-rust
codeitlikemiley
Source description: Rust SDK for the TypeSafe AI API
ElBruno.AI.Jev
elbruno
Source description: Community .NET 10 SDK for official TypeSafe AI Jev typed decisions and Microsoft.Extensions.AI integrations.
jev-android
dougsong
Source description: A Kotlin Android SDK for UI automation powered by TypeSafe Jev, with an accessibility runtime and sample app.
jev-go
Gaurav-Gosain
Source description: Go client for TypeSafe's System One API and its model Jev: typed judgments and calibrated probabilities instead of generated text
rust-sysone
zcoder-run
Source description: System One TypeSafe AI Rust Client (unofficial)
typesafe-ai-java
jamilxt
Source description: Community-maintained Java SDK for the TypeSafe AI System One (Jev) API. Not an official TypeSafe product.
jev
virolea
Source description: Ruby client for the typesafe AI Jev model
typesafeai-dotnet-sdk
saibimajdi
Source description: Community .NET SDK for the TypeSafe AI System One API — typed noul, choice, and score questions with structured, confidence-scored answers. Not affiliated with TypeSafe AI.
jev-dsl
inanna-malick
Source description: Agent-first Haskell DSL for TypeSafe's Jev judgment model: typed packets, inferred types, answers under the same labels
jevgo
devbackend
Source description: Unofficial Go client for the TypeSafe AI System One API (Jev) — typed questions in, calibrated answers out.
scala-jev-sdk
ticofab
Source description: Scala SDK for Jev. No effect system bundled.
jev-go
Stumble
Source description: Community Go SDK for TypeSafe AI Jev / System One
go-jev
mattn
Source description: Go SDK and CLI for TypeSafe Jev: typed decisions (yes/no, choice, score) from a model
evoke
evoke-build
Source description: Software, by reflex. Say it, and the right small program runs: chosen by a calibrated classifier, run only when it is sure enough, and it asks before anything that cannot be undone. A CLI, a package manager and a TypeScript SDK: the first i
jevper
zhulinchng
Source description: Jev-shaped (TypeSafe System One) classification wrapper over OpenAI-like clients: probabilities and confidence instead of prose
swift-jev
d-date
Source description: A Swift client for TypeSafe AI's Jev — typed judgements, not text
typesafe-sdk-go
Tangerg
Source description: Go SDK for the TypeSafe AI API — typed questions in, probability distributions out.
advocaat
pithings
Source description: A small, type-safe client for asking AI questions about your data, powered by TypeSafe Jev.
Source description: Ruby client for decision models such as Typesafe Jev
jev
dannote
Source description: TypeSafe Jev for OTP: reply to Jev from a GenServer and pattern match on its answer
spring-ai-typesafe
spring-ai-community
Source description: A Java SDK for the TypeSafe AI JEV API, & Spring AI TypeSafe integrations.
jevalyn
Ray-Hughes
Source description: The decision layer for your Rails app. A Rails-native wrapper around TypeSafe's Jev System One API: typed, calibrated decisions in your control flow.