Getting started with Jev API: your first structured decision in 5 minutes
Create an account, add prepaid credit, mint a jev_live_ key and make your first POST /v1/systemone call with curl. Learn to read choice, score and noul answers.
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Guides for building with Jev API
Hands-on tutorials for POST /v1/systemone: making a first call, writing robust Python and TypeScript clients, designing questions that produce reliable typed answers, and keeping prepaid spend predictable. Every example uses the real request and response format described in the API reference.
Calling Jev API from Python: a robust client with timeouts, retries and error handling
Build a production-ready Python client for Jev API with requests: connect and read timeouts, exponential backoff for 429 and 5xx, and typed errors for 401 and 402.
Using Jev API from Node.js and TypeScript with typed, validated responses
Define TypeScript types that mirror the Jev API request and response, validate answers at runtime, and call /v1/systemone with fetch, timeouts and safe retries.
Designing decision questions: how to frame state and criteria for reliable typed answers
How to choose between choice, score and noul questions, write state and criteria that produce reliable typed answers, and turn probabilities into actions.
Controlling cost on Jev API: estimating tokens, tracking usage and managing prepaid credit
How Jev API bills input tokens, how the balance check and HTTP 402 work, how to estimate tokens before sending, and how to track usage and manage prepaid credit.