Docs
OfficialJev Repos & SDKs
JavaScript SDK API Reference
The generated API reference for the official JavaScript SDK, listing every exported class, interface, function, and type.
- Format
- Docs
- Reading time
- 1 min
- Published by
- TypeSafe AI
- Last verified
- Sep 2026
Works forJev for Scoring
Used inJev for Software & DevTools
Highlights
- Classes include TypeSafeClient and a full error hierarchy from APIError to RateLimitError.
- Interfaces cover ChoiceQuestion, ScoreQuestion, NoulQuestion, SystemOneRequest, and RetryPolicy.
- Helper functions choice(), noul(), and score() are documented alongside ENV and LOG_LEVELS.
Watch out
An index with no prose or examples; pair it with the JavaScript usage guide.
Questions about this entry
Short answers drawn from the linked project or page.
TypeSafeClient and a full error hierarchy from APIError to RateLimitError. Interfaces cover ChoiceQuestion, ScoreQuestion, NoulQuestion, SystemOneRequest, and RetryPolicy, with choice(), noul(), and score() helpers documented alongside ENV and LOG_LEVELS.
No. It is an index with no prose or examples; pair it with the JavaScript usage guide when writing code.
The reference lists APIConnectionError, APITimeoutError, APIUserAbortError, AuthenticationError, BadRequestError, NotFoundError, PermissionDeniedError, RateLimitError, InternalServerError, UnprocessableEntityError, APIError, and TypeSafeError.
TypeSafeClientConfig for the client, RetryPolicy and RequestOptions for calls, Logger for logging, and ModelCard and Models for model metadata.
SystemOneRequest, SystemOneRequestPayload, and SystemOneResult for the call, with ChoiceQuestion/ChoiceResponse, ScoreQuestion/ScoreResponse, and NoulQuestion/NoulResponse for each primitive.
Functions choice, noul, and score; variables ENV, LOG_LEVELS, and VERSION; and type aliases such as Question, ResultFor, ScoreOf, and EntryType.
Through the Models interface and ModelCard, which the reference lists alongside response and request types, with WithResponse and Usage for reading results and token counts.
More Jev resources like this
Release notes for the official JavaScript and TypeScript SDK: the 11 September 2026 public release and the Score criteria breaking change.
Jev Repos & SDKsDocs#official#docs#sdk
Official
Official TypeScript/JavaScript client with inferred answer types, retries, and a question DSL. `npm install @typesafe-ai/sdk`.
Jev Repos & SDKs#official#sdk#typescript
AsyncTypeSafeClient: async system_one calls, model listing, per-call retry and timeout overrides, and an optional Pydantic response model.
Jev Repos & SDKsDocs#official#docs#sdk
Official
How the Python SDK types questions: Noul, Choice, and Score as objects or dictionaries, including optional JSON instructions and criteria.
Jev Repos & SDKsDocs#official#docs#sdk
Official
The Python response models: SystemOneResponse groups answers by id, and records the model name, token usage, and request id.
Jev Repos & SDKsDocs#official#docs#sdk
Official
The full usage guide for the Python SDK, covering typed calls, model selection, retries, error handling, logging, environment variables, and forward compatibility.
Jev Repos & SDKsDocs#official#docs#sdk
Official
From the Jev guides
Original write-ups on what this entry is for.
From the Jev AI model community
Posts from builders shipping with Jev right now.