Weights & Biases
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.
Weights & Biases publishes 11 API contracts indexed on the APIs.io network, including Calls API, Costs API, Feedback API, and 8 more. Tagged areas include Machine Learning, MLOps, Experiment Tracking, Model Registry, and Generative AI.
The Weights & Biases catalog on APIs.io includes 1 Spectral governance ruleset.
Weights & Biases’ developer surface includes authentication, developer portal, pricing, and 15 more developer resources.
What this lets a business do 1
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
Kin Score
Markets this provider is in provisional
The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.
| Market | Position | Depth | Registered MCP server | Declares compatibility |
|---|---|---|---|---|
| MLOps and AI/ML Infrastructure (LF AI & Data, MLPerf, Kubeflow) | undeclared | - | - | - |
Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
Standards implemented 1
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
APIs 11
Individual APIs this provider publishes, each with its own machine-readable definition.
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.
Scroll for all 11
Open Collections 10
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Fast Calls API
OPEN COLLECTIONFast Calls Costs API
OPEN COLLECTIONFast Calls Feedback API
OPEN COLLECTIONFast Calls Files API
OPEN COLLECTIONFast Calls Objects API
OPEN COLLECTIONFast Calls Refs API
OPEN COLLECTIONFast Calls Service API
OPEN COLLECTIONFast Calls Table API
OPEN COLLECTIONFast Calls Tables API
OPEN COLLECTIONFastAPI
OPEN COLLECTIONScroll for all 10
GraphQL 1
GraphQL schemas published by this provider.
Weights & Biases 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...
GRAPHQLWeights & Biases API pricing
Prices published by Weights & Biases, read 2026-10-07 from coreweave.com/forge-pricing. A free plan or tier is listed.
| Plan | Price |
|---|---|
| Free | $0/mo Includes: Up to 5 model seats, 5 GB/mo storage, 1 GB/mo Weave data ingestion, community support |
| Pro | Starts at $60/month, billed monthly Includes: Up to 10 model seats, 100 GB/mo storage, 1.5 GB/mo Weave data ingestion, $5/mo free inference credit |
| Enterprise | Custom plans Includes: Customizable seats and storage |
| Academic | Free forever for academic research Includes: Unlimited projects, teams, and 200GB free cloud storage, up to 25GB/mo Weave data ingestion, up to 1 |
Plan details, limits and sources →
Rate limits
- Default: see provider documentation varies
Compiled by API Evangelist, not yet checked against Weights & Biases's documentation. Rate-limit details →
Billed by: subscription · FinOps profile →
Pricing Plans 2
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Weights And Biases Rate Limits
RATE LIMITSService Levels 1
Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.
FinOps 1
Cost, billing, and metering signals for API financial operations.
Spectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
Weights & Biases API Rules
SPECTRALSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 1
Portal, sign-up, and the first successful call
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 4
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
Other 1
Properties that don't map to a standard resource type
Source (apis.yml)
Weights & Biases API — frequently asked questions
Does Weights & Biases have an API?
Yes. APIs.io lists 11 APIs from Weights & Biases, including W&B GraphQL API, W&B Import API (HTTP) and Weights & Biases Calls API, and 8 more.
Is there an OpenAPI specification for the Weights & Biases API?
Yes. APIs.io indexes 9 OpenAPI specifications for Weights & Biases, each linked for download from this page.
How do I authenticate with the Weights & Biases API?
Weights & Biases uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Weights And Biases Authentication.
How much does the Weights & Biases API cost?
Weights & Biases publishes its prices; its Free plan is $0/mo as of 2026-10-07. APIs.io lists 4 pricing plans for Weights & Biases, with each plan's price, limits and inclusions under Pricing on this page.
Is the Weights & Biases API ready for AI agents?
Weights & Biases has a Kin Score of 47.2 out of 100 (developing) and an Agent Readiness score of 25.3 (agent-aware), scored by API Evangelist on 2026-11-06.
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.