OpenTrain

OpenTrain lets a coding agent hire human data labelers, RLHF annotators and evaluators through the OpenTrain platform.

What you can do

• Connect a coding agent to the OpenTrain platform to commission human work.
• Hire human data labelers, RLHF annotators and evaluators from within the agent session.
• Use a personal API token to act on an existing OpenTrain account, or let the server register an anonymous agent account for a human to claim.
• Point the server at a different OpenTrain API base URL when needed.

When to use it

Useful when an agent's task needs human-labeled data, RLHF preference annotations or human evaluation rather than automated processing, and you want to request that work without leaving the coding agent.

Requirements

Runs locally over stdio via npx from the npm package @opentrain-ai/mcp, so Node.js is needed. An OpenTrain personal API token is supplied through the OPENTRAIN_PERSONAL_API_TOKEN environment variable; it is optional, since without it the server can register an anonymous agent account for a human to claim. OPENTRAIN_API_BASE_URL optionally overrides the default API base URL. Network access to OpenTrain is required.