API Overview

Complete API documentation for W&B Training

The W&B Training API provides endpoints for managing and interacting with training jobs, including serverless reinforcement learning (RL) and supervised fine-tuning (SFT). The API is OpenAI-compatible for chat completions.

Authentication

All API requests require authentication using your W&B API key. Create an API key at wandb.ai/settings.

Include your API key in the Authorization header:

Authorization: Bearer YOUR_API_KEY

Base URL

https://api.training.wandb.ai/v1

Available Endpoints

chat-completions

• POST /v1/chat/completions - Create Chat Completion
• POST /v1/chat/completions/ - Create Chat Completion

models

• POST /v1/preview/models - Create Model
• DELETE /v1/preview/models/ - Delete Model
• DELETE /v1/preview/models//checkpoints - Delete Model Checkpoints
• GET /v1/preview/models//checkpoints - List Model Checkpoints
• POST /v1/preview/models//log - Log

training-jobs

• POST /v1/preview/sft-training-jobs - Create SFT Training Job
• POST /v1/preview/training-jobs - Create RL Training Job
• GET /v1/preview/training-jobs/ - Get Training Job
• GET /v1/preview/training-jobs//events - Get Training Job Events

health

• GET /v1/health - Health Check
• GET /v1/system-check - System Check

Related Resources

• W&B Training overview
• Prerequisites
• Serverless SFT
• Use your trained models
• Available models
• Usage limits