API Overview

Complete API reference for W&B Inference service

Learn how to use the W&B Inference API to access foundation models programmatically.

Base URL

Access the Inference service at:

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

Important

To use this endpoint, you need:

• A W&B account with Inference credits
• A valid W&B API key

If you belong to more than one team or want to attribute your usage to a project you will also need team and project IDs. In code samples, these appear as <your-team>/<your-project>. Your default entity and the project name inference will be used if unspecified.

Available methods

The W&B Inference API provides OpenAI-compatible endpoints for interacting with foundation models:

• Chat Completions - Create chat completions using various foundation models
• List Models - Get all available models and their IDs

Authentication

All API requests require authentication using your W&B API key. You can find your API key at wandb.ai/authorize.

Include your API key in the request headers:

• For OpenAI SDK: Set as api_key parameter
• For direct API calls: Use Authorization: Bearer <your-api-key>

Error handling

See API Errors for a complete list of error codes and how to resolve them.

Next steps

• Try the usage examples to see the API in action
• Explore models in the UI
• Check usage limits for your account