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unofficial go SDK for typesafe AI, with typed answers, retries, and context support
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CommunityJev Repos & SDKs
TypeSafe Go — cole-gillespie
Unofficial, independently maintained Go client for the TypeSafe AI System One API with no third-party dependencies: choice, score and noul questions, typed accessors that error instead of returning zero, and per-call timeout, retry and header overrides.
- Stars
- 1
- Language
- Go
- License
- MIT
- Published by
- Community
- Author
- cole-gillespie
- Last verified
- Oct 2026
This is one of several Jev listings for the same project. The canonical entry is TypeSafe Go — sd109.
About this project
an unofficial go SDK for the typesafe AI API, inspired by the official typescript and python clients. independently maintained, with no affiliation with typesafe. requires go 1.22 or newer. no third-party dependencies. create an api key in the typesafe console, then set TYPESAFEAPIKEY. the module path is github.com/cole-gillespie/typesafe-go. after the repository is published, install it with: run the included example from this repository:
Quoted from the project's README. Read the full README.
Works forJev for Classification
Used inJev for Software & DevTools
- Languages
- Go
Highlights
- Typed accessors error on a missing field or a mismatched answer type instead of returning zero, and `SystemOne` checks every answer it requested.
- Two retries after the first attempt on connection failures, attempt timeouts, 408, 429 and 5xx, with backoff from 500ms to 5s and up to 25% jitter subtracted.
- A retry can resubmit an evaluation the server already processed: the README states there is no idempotency guarantee.
- Not a feature-for-feature port: logging and arbitrary extra request-body fields are not exposed, and `*typesafe.APIError` keeps the body and headers.
Watch out
It is explicitly not affiliated with TypeSafe and not a feature-for-feature port: logging and arbitrary extra request-body fields are not exposed. The README asks you to install it with `go get` only after the repository is published, and says live service compatibility still needs verification with a real key, since tests use local HTTP servers and synthetic responses. Score questions require at least two levels, indexed from zero. Copy reviewed against the repository README on 2026-10-04, not from running it.
Questions about this entry
Short answers drawn from the linked project or page.
It covers `POST /v1/systemone` and `GET /v1/models` with matching defaults, but the README calls it not a feature-for-feature port: logging and arbitrary extra request-body fields are not exposed. It is independently maintained with no affiliation, and its tests run against local HTTP servers with synthetic responses, so live compatibility still needs an API key to confirm.
You can pay twice for the same evaluation. The README says a retry can resubmit an evaluation the server processed but whose response was lost, that this SDK provides no idempotency guarantee, and that you should disable retries when duplicate evaluations are undesirable. Start from `DefaultRetryPolicy()` and set `MaxRetries = 0`.
Yes. Each accessor returns a typed value and an error, so a missing field or a mismatched answer type produces an error rather than a silently returned zero, and `SystemOne` checks every requested answer, with the raw JSON still available at `result.Answers[name]`. Confidence summarizes the distribution over options or levels and is not a guarantee of correctness.
The timeout covers each attempt including body delivery and defaults to ten seconds, while a context deadline bounds the whole operation including retry waits, and a custom HTTP client's timeout also applies. Redirects are not followed unless you supply your own client with an explicit redirect policy. Clients are reusable across goroutines, but supplied transports must be concurrency-safe.
Set Config.BaseURL or Config.DefaultModel, or the TYPESAFE_BASE_URL and TYPESAFE_DEFAULT_MODEL variables. Defaults are https://api.typesafe.ai and jev-latest, and a base URL may include a proxy path prefix.
Two retries after the first attempt on connection failures, attempt timeouts, HTTP 408, 429 and 5xx, with exponential backoff from 500 ms to five seconds and up to 25% jitter subtracted; retry-after-ms and Retry-After are honored up to one minute.
HTTP failures return a *typesafe.APIError retaining StatusCode, Body, Header, and RequestID, which you read with errors.As; cancellation and deadlines stay detectable with errors.Is, and successes include Usage input and output token counts.
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