Do I need both the library and the MCP server?

No. Use TypeSafe.Client alone when you only need AskAsync, ChooseAsync, RateAsync, or EvaluateAsync in code. Add JevMcp only when you want agents to call evaluate, evaluate_batch, validate_questions, or examples as tools.

How does it behave under rate limits or overload?

The client retries 429 and 529 responses with exponential backoff while honoring Retry-After, and surfaces typed errors through TypeSafeApiException helpers for unauthorized, validation, rate-limited, and overloaded cases.

What does validate_questions actually save me?

It checks question atomicity, required fields, and duplicates locally with no upstream call, so you can catch malformed batches before spending tokens or hitting the evaluation endpoint.

How do I wire the API key into an agent setup?

Put the key in MCP appsettings.json under TypeSafe ApiKey or export TYPESAFE__ApiKey, register with AddTypeSafeClient, then point your MCP client at the built JevMcp executable.

What .NET version and features does it target?

.NET 10, with source-generated JSON throughout for trimming and native AOT compatibility. The client exposes typed NoulAnswer, ChoiceAnswer and ScoreAnswer models with a fluent EvaluationRequestBuilder and async convenience methods.

What limits apply to the MCP tools?

evaluate takes 1 to 20 atomic typed questions in one parallel call, evaluate_batch runs the same questions across up to 50 items, and validate_questions is a free local check with no upstream call. examples() returns canonical call patterns.

What does an MCP result include?

Results preserve raw probabilities and confidence rather than reducing them to booleans, and include a request_id, latency_ms and token usage. They surface truncation warnings and return structured errors such as malformed_question, state_too_large or rate_limited.

CommunityJev Tools & CLIs

JevApi

.NET 10 client plus MCP server for the Jev evaluation API, covering noul, choice, and score questions with typed answers, probability distributions, and confidence values.

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Stars: 1
Language: C#
License: MIT
Published by: Community
Author: JawzoD3TH
Last verified: Oct 2026

JawzoD3TH/JevApi

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JevApi — .NET tooling for the TypeSafe AI Jev model, which evaluates typed questions (noul/choice/score) against a state and returns structured answers with probabilities and confidence.

Forks: 1
Last pushed: Updated Oct 2026

Repo stats from the GitHub API, cached Oct 2026.

About this project

.NET tooling for the TypeSafe AI Jev System One model. Jev evaluates typed questions — noul (yes/no), choice (pick an option), and score (rate on a rubric) — against a state and returns structured answers with probability distributions and confidence values. Targets .NET 10, with source-generated JSON throughout for trimming and native AOT compatibility. A user-friendly, AOT-safe .NET client library for the Jev evaluation API (`POST.

Quoted from the project's README. Read the full README.

Tagscommunity github

Works forJev for Scoring Jev for Evaluation

Used inJev for Software & DevTools

Languages: C# / .NET

Highlights

TypeSafe.Client offers typed NoulAnswer, ChoiceAnswer, and ScoreAnswer models with fluent builders and async helpers.
Retries 429 and 529 with exponential backoff honoring Retry-After, plus typed TypeSafeApiException helpers.
JevMcp exposes evaluate for 1-20 questions, evaluate_batch for up to 50 items, plus free validate_questions.
Configures via AddTypeSafeClient and appsettings.json or the TYPESAFE__ApiKey environment variable.

Watch out

Needs a TypeSafe API key and a .NET 10 build; the MCP side only wraps the client and keeps raw scores. 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.

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