Jev MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Jev MCP or direct API to discover available models, run Noul evaluations, ask Choice and Score questions, and retrieve structured model state through natural language.

Jev logoJev
Api Key

Jev is TypeSafe AI's System One API for discovering models and evaluating structured state. Use it to run Noul, Choice, and Score structured evaluations with strong typing.

2 Tools

Try Jev now

Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
Jev
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TOOLS

Supported Tools

Every Jev action and event your agent gets out of the box.

Evaluate State

Evaluate one shared state against one or more named Noul, Choice, or Score questions in parallel; each call performs usage-priced inference.

List Models

List the Jev model names and aliases available to the connected account for use in evaluations.

SETUP GUIDE

Connect Jev MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
Install the Composio SDK for Python or TypeScript
2

Initialize Client and Create Tool Router Session

typescript
import { Composio } from '@composio/core';

const composio = new Composio({ apiKey: 'your-api-key' });
// create an auth config for Jev (API key)
const authConfig = await composio.authConfigs.create({ toolkit: 'jev', config: { type: 'api_key' } });
// link a connected account using your Jev API key
const connectedAccount = await composio.connectedAccounts.link({ toolkit: 'jev', auth_config_id: authConfig.id, credentials: { api_key: 'YOUR_JEV_API_KEY' } });

const session = await composio.create('your-user-id');
console.log(`Tool Router session created: ${session.mcp.url}`);
Import and initialize the Composio client, then create a Tool Router session for Jev
3

Connect to AI Agent

typescript
import { openai } from '@ai-sdk/openai';
import { experimental_createMCPClient as createMCPClient } from '@ai-sdk/mcp';
import { generateText } from 'ai';

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: session.mcp.url,
    headers: {
      'x-api-key': 'your-composio-api-key',
    },
  },
});

const tools = await client.tools();
const { text } = await generateText({
  model: openai('gpt-4o'),
  tools,
  messages: [{
    role: 'user',
    content: 'Discover available Jev models and run a noul evaluation named "sanity_check" on the top model'
  }],
  maxSteps: 5,
});

console.log(`Agent: ${text}`);
Use the MCP server with your AI agent (Anthropic Claude or Mastra)
SETUP GUIDE

Connect Jev API Tool with your Agent

1

Install Composio

typescript
npm install @composio/openai
Install the Composio SDK
2

Initialize Composio and Create Tool Router Session

typescript
import OpenAI from 'openai';
import { Composio } from '@composio/core';
import { OpenAIResponsesProvider } from '@composio/openai';

const composio = new Composio({
  provider: new OpenAIResponsesProvider(),
});
const openai = new OpenAI({});
const session = await composio.create('your-user-id');
Import and initialize Composio client, then create a Tool Router session
3

Execute Jev Tools via Tool Router with Your Agent

typescript
const tools = session.tools;
const response = await openai.responses.create({
  model: 'gpt-4.1',
  tools: tools,
  input: [{
    role: 'user',
    content: 'Discover available Jev models and run a noul evaluation named "sanity_check" on the top model'
  }],
});
const result = await composio.provider.handleToolCalls(
  'your-user-id',
  response.output
);
console.log(result);
Get tools from Tool Router session and execute Jev actions with your Agent

Why Use Composio?

AI Native Jev Integration

  • Supports both Jev MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for reading, writing, and querying your Jev data

Managed Auth

  • Built-in OAuth handling with automatic token refresh and rotation
  • Central place to manage, scope, and revoke Jev access
  • Per user and per environment credentials instead of hard-coded keys

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Jev
  • Scoped, least privilege access to Jev resources
  • Full audit trail of agent actions to support review and compliance
FRAMEWORKS

Use Jev with any AI Agent Framework

Choose a Framework you want to connect Jev with

FAQ

Frequently asked questions

Yes, Jev requires you to configure your own API key credentials. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Yes. Composio is SOC 2 Type II compliant and is built to keep your Jev connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.

Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

Create the key in your Jev account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Jev actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Jev at any time.

When you connect a Jev account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Jev as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.

Whatever the credentials you connect allow inside Jev. If Jev lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside Jev at any time.

Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each Jev connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.

The connection stops working the moment Jev rejects the old key. Create a new key in Jev and reconnect the account from the Composio dashboard or by asking your agent to reconnect Jev. Nothing else changes.

Composio's free plan includes 100,000 tool calls per month with no credit card, which covers most personal Jev use. Paid plans add higher limits and team features. Your Jev plan and its API limits still apply as usual.

Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple Jev accounts).

With Composio, you connect Jev once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.

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