API· Last updated 2026-09-21

Jev API Content Types

The documented evaluation call sets Content-Type: application/json and a JSON body. Models are text only: string, object, or array of text values. There is no documented multipart, protobuf, or audio content type for System One.

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Related search language: Jev API content types, TypeSafe Jev, Jev decision model, decision automation.

See also the api hub.

Jev API Content Types: context

Pre-process images, audio, video, and binaries into text or structured fields before you call Jev.

Jev API Content Types: inputs

UTF-8 JSON. Bearer auth header is not a content type. Do not send text/plain and expect the API to parse a question map.

Jev API Content Types: decision logic

A wrong content type typically never becomes a valid evaluation — you will see a client or 422-class failure. Fix the header and body.

Jev API Content Types: implementation notes

If TypeSafe adds other encodings, the API page will say so. Until then, JSON only.

FAQ

What is the evaluation URL?

According to TypeSafe documentation: POST https://api.typesafe.ai/v1/systemone.

What is the difference between jev-1.13 and jev-1.13.0?

TypeSafe’s models page uses jev-1.13 as the product line and jev-1.13.0 as the versioned id. Aliases are jev-latest and jev-preview. Do not send a truncated id unless that page lists it.

Are prices and rate limits on this page ours?

No. They are vendor-published list figures. Confirm on docs.typesafe.ai/models. Limits can change without notice.

What this page does not claim

• Official TypeSafe status, logos, or support.
• That jev.pro sells, issues, or proxies API keys.
• Extra first-party HTTP routes beyond POST /v1/systemone and GET /v1/models unless the API reference lists them.
• Invented latency SLOs, search volume, or unofficial prices. List price and rate limits are vendor claims — confirm on models.
• That a schema-constrained answer is automatically factually correct.

Disclaimer

This is an independent unofficial site and is not affiliated with TypeSafe AI; official documentation is available at https://docs.typesafe.ai.

Primary documentation: https://docs.typesafe.ai. Never treat jev.pro as TypeSafe official documentation. We do not sell, issue, or proxy API keys.