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Jev glossary

EcosystemModel Context Protocol server

MCP server

A server that exposes Jev to coding agents as a tool through the Model Context Protocol, usually one evaluate call.
Open docs.typesafe.aiAll 177 terms
Category
Ecosystem
Also known as
Model Context Protocol server
Reading time
1 min
Related terms
3
Directory entries
132
Docs
docs.typesafe.ai
Added
2026-09-24

Definition

MCP servers put Jev inside agent environments. Typesafe MCP is a single-binary Go server exposing one evaluate tool for Noul, Choice, and Score questions with one-command registration for Claude Code, Claude Desktop, and Codex; jkudish-jev-mcp and others take similar approaches.

They are the most common way Jev reaches a coding loop without the agent writing SDK glue, and they pair naturally with the agent skill that teaches good question structure.

Tagsagentstools

Related terms

Definitions that connect to this one.

Coding agentThe fastest-growing corner of the Jev ecosystem: MCP servers, tool-call gates, context pruners, and skill rankers.EcosystemAgent skillA drop-in SKILL.md that teaches coding agents to structure Jev states and questions and to batch questions per call.EcosystemClient SDKThe official typed clients for the API (Python and JavaScript/TypeScript), with retries and inferred answer types.API & Models

From the Jev directory

Directory entries that go deeper on this term.

Typesafe MCP
353GitHub stars
A single-binary Go MCP server exposing one evaluate tool for noul, choice, and score questions, with one-command registration for Claude Code, Claude Desktop, and Codex.
Jev Tools & CLIs#community#go#mcp
Communityitsmostafa/typesafe-mcpGo
Jev MCP
539GitHub stars
An MCP server exposing ten Jev judgment tools, including verify, screen, find, rerank, classify, review, and gate, each returning typed probabilities in roughly 150 to 500 ms.
Jev Tools & CLIs#community#typescript#mcp
Communityjkudish/jev-mcpJavaScript
Agent Skill
2.7kGitHub stars
Drop-in skill for Claude Code, Codex, and other agent environments that teaches the right way to structure states and questions.
Jev Tools & CLIsDocs#official#agent#skill
Officialtypesafe-ai/skills
decisionkit
Provider-neutral CLI, Claude Code plugin, and MCP server that asks yes/no, choice, score, or rank questions about text and returns probabilities. Talks to Jev, Jev via OpenRouter, the OpenAI Decisions API, or Claude.
Jev Agents & MCP#mcp#cli#claude-code
Community
GoGoJevMCP
0GitHub stars
Go agent that runs a local model through Ollama and uses Jev to pick the relevant skill and MCP tool for each request. The LLM generates tool arguments, which are validated against the tool schema before the MCP client executes them.
Jev Agents & MCP#github#agents#mcp
Communityantirepas/GoGoJevMCP
mcp-jev
Standalone MCP server that exposes Jev's typed decisions to MCP hosts such as Cursor and Claude Code, with an HTTP mode and an importable library. Handles choice, score, and boolean questions across Vercel, OpenRouter, and TypeSafe providers.
Jev Agents & MCP#mcp#typescript#openrouter
Community

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