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- United States
- DR 32 no change since last check
APIs & SDKs
Jev API
Decision API for typed questions with probabilities
- Community votes
- 0
- DR by Ahrefs
- 1 no change since last check
Ahrefs Domain Rating benchmarked 11 Nov 2026, rebuilt 11 Nov 2026.
API endpoint that sends a state and typed questions to get Noul, Choice, or Score answers with probabilities for code to branch on.
What it is
Jev API is an independent decision endpoint that lets software send context and typed questions to get structured answers with probabilities. You send a state (string, JSON object, or array) and up to six typed questions, then receive Noul (yes/no probability), Choice (pick one of named options with probabilities), or Score (place on an ordered scale with distribution) answers that code can act on.
The API charges 1 credit per successful decision call; failed calls and validation errors are free. It supports the TypeSafe SDKs by changing the base URL and runs via POST /api/v1/decisions with a Bearer API key. The endpoint accepts jev-1.13 and jev-latest model versions and returns probabilities for every option, so code can branch on confidence levels.
What it is built with
- Three answer types: Noul (yes/no probability), Choice (select one of named options), Score (place on ordered scale)
- Up to 6 questions per request in one round trip
- Returns probability for every option, not just the selected one
- Support for TypeSafe SDKs by changing base URL
- State up to 60,000 characters (string, JSON object, or array)
- 2 to 8 options per Choice question
- 2 to 10 levels per Score question
- Accessible API playground for testing
- Failed calls and validation errors do not consume credits
Pricing
Pricing model: Freemium
Free plan available. Paid plans: Basic $10/month (1,000 credits), Pro $20/month (2,000 credits), Max $50/month (5,000 credits). Yearly plans save 20%. About 100 credits cost 1 USD before tax. One-time credit packs available; credits never expire.
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Jev API metrics
| Metric | Value |
|---|---|
| Domain Rating | 1 no change since last check |
| Trust Flow | 1 no change since last check |
| Citation Flow | 18 no change since last check |
| Referring domains | 2 no change since last check |
| External backlinks | 79 no change since last check |
Ahrefs Domain Rating benchmarked 11 Nov 2026, rebuilt 11 Nov 2026. Main build topic: Arts/Performing Arts (1). Majestic benchmarked 11 Nov 2026, rebuilt 11 Nov 2026. Link data built by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
Jev API domain build sheet
Open the build sheet
| Domain age | 1 month |
|---|---|
| Registered | |
| Expires | |
| Registrar | Spaceship, Inc. |
| DNSSEC | Not signed |
Jev API after-launch build log
Since Jev API launched on Maker Launches on 11 November 2026, these are the figures we have tracked.
- Domain Rating (Ahrefs)
- 1
- First measured 11 Nov 2026
- Trust Flow (Majestic)
- 1
- First measured 11 Nov 2026
- Referring domains (Majestic)
- 2
- First measured 11 Nov 2026
Day 0 since launch. Next receipt: day 30, 11 Dec 2026. We show what changed, not what caused it: many things affect these numbers. Nothing here is estimated.
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Questions from the bench
- What is the Jev API?
- The Jev API is how software calls Jev, TypeSafe AI's System One model. You send a state and typed questions, and Jev returns a Noul probability (yes/no), a Choice with a probability for each option, or a Score on your scale. It does not write text.
- How much does a Jev API call cost?
- A successful POST /api/v1/decisions uses 1 credit, whether it carries one question or six. Validation errors and failed upstream calls use no credits. About 100 credits cost 1 USD before tax.
- Is this the official TypeSafe API?
- No. TypeSafe AI builds and serves Jev. This site is an independent API service where keys, credits, and support come from this site, not from a TypeSafe account. For TypeSafe's console and per-token pricing, go to typesafe.ai.
- Can I switch or cancel my plan?
- Yes, from the billing page. Upgrades apply on the current cycle. Downgrades and cancellations apply at the end of the cycle you already paid.
- Do one-time credits expire?
- No. Credits from a one-time top-up stay on the account until you use them.
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