Jev MCP Server

Connect Jev to Claude, ChatGPT and Copilot: yes/no checks, classifications and scores, with the probability behind every answer as MCP tools. Powered by AnythingMCP.

Jev MCP Server gives Claude, ChatGPT, Copilot and Cursor 6 tools for Jev: yes/no checks, classifications and scores, with the probability behind every answer. Every tool only reads. It runs on AnythingMCP: one click on AnythingMCP Cloud, or self-hosted with Docker. Credentials are stored encrypted and every call is audited.

Last verified: 2026-09-27 against the live TypeSafe API (jev-1.13.0) (every tool called through a local AnythingMCP over MCP, 27 direct API cases incl. error paths, and Claude Code triaging English and German tickets through the connector).
Adapter synced: 2026-09-27

Maintained by @keysersoft, an AnythingMCP maintainer. Built on AnythingMCP by helpcode.ai.

Quick start (AnythingMCP Cloud)

1. Sign in at cloud.anythingmcp.com and open the install link.

2. Enter TYPESAFE_API_KEY (see Authentication).

3. Copy the URL of your MCP server under MCP Servers and add it to your AI client (below).

AnythingMCP Cloud is the same open-source code, operated by helpcode.ai in Frankfurt, Germany.

Related MCP server: Numbers Online

Self-hosted (Docker)

Needs Docker 24+, openssl and Node 18+.

git clone https://github.com/keysersoft/jev-mcp-server.git
cd jev-mcp-server
./scripts/install.sh

install.sh writes .env with fresh secrets, starts AnythingMCP, creates the first admin, installs the connector if TYPESAFE_API_KEY are set in .env and creates an MCP API key. Without credentials it prints the install link instead: http://localhost:3000/connectors/store?install=jev. Then check the whole chain:

npm install && node scripts/smoke.mjs

Connect Claude, ChatGPT, Copilot or Cursor

• Claude (claude.ai, Desktop, mobile): Customize → Connectors → Add custom connector, paste your MCP server URL and sign in. Claude connects from Anthropic's cloud, so the URL must be public HTTPS: your AnythingMCP Cloud URL, or your own instance behind TLS.

• Claude Code:

  claude mcp add --transport http jev-mcp-server http://localhost:4000/mcp --header "X-API-Key: <MCP_API_KEY>"

• Cursor (.cursor/mcp.json) and VS Code / GitHub Copilot (.vscode/mcp.json, key servers instead of mcpServers, plus "type": "http"):

  { "mcpServers": { "jev-mcp-server": { "url": "http://localhost:4000/mcp", "headers": { "X-API-Key": "<MCP_API_KEY>" } } } }

• ChatGPT: add the public HTTPS URL as a connector (app) in ChatGPT's settings. A localhost URL does not work there.

Tools

6 tools, generated from adapter/jev.json. read tools cannot change anything in the source system.

Example prompts

• Use Jev to decide which of these support tickets are urgent, and show the probability for each.

• Classify each ticket below into billing, technical, sales or none with Jev, and list the ones where confidence is below 0.6.

• Rate these five leads from 0 (no fit) to 3 (ideal customer) with Jev against the profile below.

• Ask Jev whether this reply answers every question in the customer's email before I send it.

• Ask Jev whether these two supplier records describe the same company.

• Which of these 20 emails ask for a refund? Use Jev and give me only the ones above 0.8.

More in examples/prompts.md.

Authentication

The connector needs one value:

The key is sent as Authorization: Bearer <key> to https://api.typesafe.ai. At install, AnythingMCP checks it with a free GET /v1/models call and then stores it encrypted.

Security

• Read or write is your choice. All 6 tools only read. Assign the connector to an MCP server whose role whitelists only the tools you want, and the rest are invisible to that client.

• Credentials are encrypted with AES-256-GCM and never shown to the model.

• Response mapping drops or reshapes fields per tool before they reach the model, e.g. bank details or personal data.

• Audit log: every call is recorded with input, output, duration and status, in your own database when self-hosted.

• SSO, RBAC and SCIM are included in the self-hosted build.

FAQ

What is Jev?

Jev is the first System One model from TypeSafe. It does not generate text: you pass evidence (the state) and typed questions, and it answers each one with a yes/no probability, one option out of a set you define, or a score on ordered levels, with the probabilities behind the answer. In our tests a call took 220 to 430 ms.

How do I use Jev in Claude or ChatGPT?

Install the Jev connector on AnythingMCP with your TypeSafe API key, then add the AnythingMCP server URL to Claude as a custom connector or to ChatGPT as a developer-mode app. Both sign in with OAuth, so nothing has to run on your computer. Claude Code, Cursor and other clients take the same URL with an API key header.

Which tools does the connector have?

jev_yes_no, jev_classify and jev_rate ask one question each with simple parameters; jev_ask sends several questions of any type about the same evidence in one call; jev_list_models lists the models your key can use; jev_playbook explains to the model how to phrase questions and read the answers, without calling the API.

What does it cost?

TypeSafe bills Jev per input token, about $0.042 per million, and output is free. A call with three questions about a short support ticket used about 500 tokens. AnythingMCP itself is free when self-hosted.

Can a team share one TypeSafe key?

Yes. The key is stored once, encrypted, on the AnythingMCP server. People connect to the server with their own login, never see the key, and every call is written to the audit log.

Does Jev understand languages other than English?

It handles them. German and Italian tickets came back correct and confident in our tests; English is where TypeSafe reports the best accuracy, so watch the confidence values for other languages.

Troubleshooting

Related

• openapi-to-mcp: OpenAPI to MCP: turn any OpenAPI/Swagger or REST API into an MCP server for Claude & ChatGPT. Every endpoint a tool, no code.

• erp-mcp-server: ERP MCP server: connect 16 ERPs (SAP, Odoo, JTL-Wawi, Xentral, weclapp, ERPNext…) to Claude & ChatGPT. Self-hosted or cloud.

• AnythingMCP: the open-source MCP server and gateway this repository is built on.

License

AGPL-3.0-only. The adapter definition in adapter/ comes from AnythingMCP (AGPL-3.0).