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Go SDK for TypeSafe AI API https://docs.typesafe.ai/api
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typesafeai (Go client)
A small Go client for the System One API with typed Noul, Choice, and Score question structs, developed independently of the official Python and TypeScript SDKs.
- Stars
- 1
- Language
- Go
- License
- APACHE-2.0
- Reading time
- 3 min
- Published by
- Community
- Author
- chez-shanpu
- Last verified
- Sep 2026
About this project
A Go client for the TypeSafe AI API. It is developed as a repository independent from the official SDKs (Python / JavaScript-TypeScript). You can send three types of typed questions — Noul (yes/no probability), Choice (options), and Score (ordered levels) — and receive answers in the corresponding types. See examples/noul.go for a more detailed example.
Quoted from the project's README. Read the full README.
Works forJev for Scoring
Used inJev for Software & DevTools
Highlights
- Question values are typed structs, so answers come back as NoulAnswer, ChoiceAnswer, or ScoreAnswer instead of loose maps.
- A Noul question can describe both the true and false conditions through its criteria field.
- State accepts any value, including a bare number, and the model is a named constant such as ModelJevLatest.
- The surface stays deliberately small: one SystemOneClient and one Do method.
Quickstart
go
client := typesafeai.NewSystemOneClient(apiKey, http.DefaultClient)
resp, err := client.Do(context.Background(), &typesafeai.SystemOneRequest{
State: 42,
Model: typesafeai.ModelJevLatest,
Questions: map[string]typesafeai.Question{
"num": &typesafeai.NoulQuestion{Instructions: "Is the number even?"},
},
})Watch out
Apache-2.0. An independent client, not an official TypeSafe SDK; reads TYPESAFE_API_KEY and needs an http.Client.
Questions about this entry
Short answers drawn from the linked project or page.
The README's only stated reason is provenance: it is developed as a repository independent of the official Python and JavaScript/TypeScript SDKs. That is a difference of origin rather than of capability, and nothing here claims to be more complete or more maintained than the alternatives.
It is fatal in the documented path. The quickstart casts the answer to *typesafeai.NoulAnswer and calls log.Fatalf when the assertion fails, so a type mismatch terminates rather than degrading. No unknown-type fallback behaviour is described anywhere in the README.
Nothing documented says so. The page covers installation and a single Noul quickstart; retries, an error taxonomy, and configuration options are not described. Timeouts come from whatever http.Client you hand to NewSystemOneClient, so default behaviour is whatever the standard client gives you.
The shape allows it. Questions is a map keyed by name, so several typed questions can share one request against the same state. However, the README demonstrates only the single-question Noul path, so behaviour beyond the map type is not shown.
go get github.com/chez-shanpu/typesafeai-go. The README reads TYPESAFE_API_KEY from the environment itself and exits if it is unset, then hands both the key and an *http.Client to NewSystemOneClient, so timeouts and transport are yours to configure. examples/noul.go carries the longer version of the quickstart. The repository is Apache-2.0.
Noul returns a yes probability, Choice returns one of the options you supplied, and Score returns a position on your rubric, each as its own answer type behind the shared Question interface. A NoulQuestion also takes an optional NoulCriteria with True and False descriptions, so you can spell out what each outcome means rather than only asking the bare question.
resp.Answers is a map keyed by the names you chose, and the README checks the ok from the lookup and exits when the key is absent rather than reading a nil answer. State accepts any value, including the bare number used in the quickstart, and the model is a named constant such as typesafeai.ModelJevLatest rather than a string you assemble yourself.
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