---
title: "Weights & Biases (@wandb)"
description: "Building the best tools for ML practitioners"
account: "wandb"
---

# Weights & Biases

Building the best tools for ML practitioners

## APIs

3 public APIs with a stored document.
Each links to its markdown overview; the same address with
`/llms.txt` in place of `.md` lists its operations.
Changes across these APIs: https://skmtc.dev/wandb/feed.md

- [Weights & Biases Weave Stainless API](https://skmtc.dev/wandb/apis/fastapi.md): LLM observability: trace calls, log feedback and costs, run evaluations, and manage datasets and annotation queues
- [Catnip Container API](https://skmtc.dev/wandb/apis/catnip-container-api.md): Containers: manage PTY sessions, git repos and worktrees, ports, Claude sessions and file uploads
- [Serverless Training](https://skmtc.dev/wandb/apis/serverless-training.md): Training and evaluation: run training jobs, chat completions, evaluations, datasets, traces and cost tracking