English Français العربية

OpenTrain

Official registry Developer tools

Hire human data labelers, RLHF annotators, and evaluators from your coding agent.

Source code Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @opentrain-ai/mcp
Claude Code 
claude mcp add opentrain -e 'OPENTRAIN_PERSONAL_API_TOKEN=<your opentrain_personal_api_token>' -e 'OPENTRAIN_API_BASE_URL=https://app.opentrain.ai' -- npx -y @opentrain-ai/mcp@0.2.2
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "opentrain": {
            "command": "npx",
            "args": [
                "-y",
                "@opentrain-ai/mcp@0.2.2"
            ],
            "env": {
                "OPENTRAIN_PERSONAL_API_TOKEN": "<your opentrain_personal_api_token>",
                "OPENTRAIN_API_BASE_URL": "https://app.opentrain.ai"
            }
        }
    }
}

Environment variables

  • OPENTRAIN_PERSONAL_API_TOKEN secret OpenTrain personal API token (ot_pat_...). Optional: if absent, the server can register an anonymous agent account at runtime for a human to claim.
  • OPENTRAIN_API_BASE_URL OpenTrain API base URL. Defaults to https://app.opentrain.ai.

Frequently asked questions

What is OpenTrain?

Hire human data labelers, RLHF annotators, and evaluators from your coding agent.

How do I install OpenTrain?

It runs on your machine. In Claude Code: claude mcp add opentrain -e 'OPENTRAIN_PERSONAL_API_TOKEN=<your opentrain_personal_api_token>' -e 'OPENTRAIN_API_BASE_URL=https://app.opentrain.ai' -- npx -y @opentrain-ai/mcp@0.2.2. For other clients, paste the JSON configuration from this page into their MCP settings.

Does OpenTrain need an API key?

Yes. It expects OPENTRAIN_PERSONAL_API_TOKEN, which you set in its configuration.

Is OpenTrain open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains OpenTrain?

It is published by OpenTrain-AI. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.