# Weights & Biases

**Canonical:** https://apis.io/providers/weights-and-biases/  
**Website:** https://wandb.ai/  
**APIs profiled:** 11

Weights & Biases is the ML developer platform for experiment tracking, model registry, artifact management, sweeps, reports, and (Weave) GenAI evaluation. The W&B API is primarily a GraphQL endpoint, surfaced through a Python `wandb.Api` SDK.

## Kin Score — 30.5 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 30.5).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 53.4 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 23.7 |
| Access Clarity | 23.7 |

## Agent readiness — 35.9 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: high).

## APIs (11)

- **W&B GraphQL API** — The W&B Public API is a GraphQL endpoint at `https://api.wandb.ai/graphql`. It backs the Python `wandb.Api()` SDK and exposes runs, projects, sweeps, artifacts, reports, registr...
- **W&B Import API (HTTP)** — The wandb client uses an HTTP file/import endpoint to push run metrics, system stats, and artifacts. Generally accessed through the SDK rather than directly.
- **Weights & Biases Calls API** — The Calls API from Weights & Biases — 8 operation(s) for calls.
- **Weights & Biases Costs API** — The Costs API from Weights & Biases — 3 operation(s) for costs.
- **Weights & Biases Feedback API** — The Feedback API from Weights & Biases — 4 operation(s) for feedback.
- **Weights & Biases Files API** — The Files API from Weights & Biases — 2 operation(s) for files.
- **Weights & Biases Objects API** — The Objects API from Weights & Biases — 4 operation(s) for objects.
- **Weights & Biases Refs API** — The Refs API from Weights & Biases — 1 operation(s) for refs.
- **Weights & Biases Service API** — The Service API from Weights & Biases — 2 operation(s) for service.
- **Weights & Biases Table API** — The Table API from Weights & Biases — 1 operation(s) for table.
- **Weights & Biases Tables API** — The Tables API from Weights & Biases — 4 operation(s) for tables.

## Agentic access (1)

- **Weights And Biases Agentic Access** — 29 operations · 27 acting

## Security (3)

- **Weights And Biases Authentication** — http · 1 scheme
- **Weights And Biases Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Weights And Biases Vulnerability Disclosure** — disclosure policy published

## Plans (1)

- **Weights And Biases Plans Pricing**

## Tags

ML, MLOps, Experiment Tracking, Model Registry, GenAI

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/weights-and-biases/). Scores are computed from the provider's own public artifacts under a published rubric.