Need help with your APIs? I offer API discovery, governance & evangelism services. Explore services →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC
Blizzard Entertainment website screenshot

Blizzard Entertainment

Blizzard Entertainment is an American video game developer and publisher and a subsidiary of Activision Blizzard. Blizzard exposes a Battle.net Developer Portal that provides public OAuth 2.0 protected APIs returning game data and player profile data for its major franchises including World of Warcraft, Diablo III, StarCraft II, and Hearthstone.

agent ready

Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.

Kin Score

API Evangelist profiles Blizzard Entertainment the way a machine reads it — 45 machine-readable artifacts across 18 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Blizzard Entertainment scores 54.8/100 (developing), with a separate agent-readiness read of 48/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 54.8/100 · developing
Contract Quality 15.9 / 25
Developer Ergonomics 7.8 / 20
Commercial Clarity 11.6 / 20
Operational Transparency 4.8 / 13
Governance 4.7 / 12
Discoverability 10.0 / 10
Agent readiness — 48/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3

How we profile Blizzard Entertainment

Each block below is one kind of artifact we hold for Blizzard Entertainment. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 18

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

Individual APIs this provider publishes, each with its own machine-readable definition.

Blizzard Entertainment Achievements API

Retrieve achievement reference data.

Blizzard Entertainment Acts API

Retrieve Diablo III act reference data.

Blizzard Entertainment Artisans API

Retrieve artisan and recipe reference data.

Blizzard Entertainment Auctions API

Retrieve live auction-house listings per connected realm.

Blizzard Entertainment Authorization API

User-context authorization endpoints.

Blizzard Entertainment Card Backs API

Retrieve Hearthstone card-back data.

Blizzard Entertainment Cards API

Search and retrieve Hearthstone cards.

Blizzard Entertainment Characters API

Retrieve character class and skill reference data.

Blizzard Entertainment Decks API

Decode Hearthstone deck codes.

Blizzard Entertainment Guilds API

Retrieve guild profile data.

Blizzard Entertainment Items API

Retrieve item type and item reference data.

Blizzard Entertainment Ladders API

Retrieve ladder, grandmaster, and season data.

Blizzard Entertainment Metadata API

Retrieve Hearthstone metadata reference data.

Blizzard Entertainment Mounts API

Retrieve mount index and detail data.

Blizzard Entertainment Profiles API

Retrieve player career and hero profile data.

Blizzard Entertainment Realms API

Retrieve realm and connected-realm reference data.

Blizzard Entertainment Token API

Token issuance and inspection endpoints.

Blizzard Entertainment UserInfo API

OpenID Connect userinfo endpoint.

Scroll within the panel for all 18 ·

Open Collections 5

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

Cost, billing, and metering signals for API financial operations.

Features 6

The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.

Notable capabilities this provider offers.

Multi-Game Coverage

Single platform exposes Game Data and Community APIs for World of Warcraft, Diablo III, StarCraft II, and Hearthstone

OAuth 2.0 Authentication

Client credentials flow for public game data and authorization code flow for player-profile data

Regional API Hosts

Independent regional endpoints for US, EU, KR, TW, and CN with locale-aware responses

Battle.net Account Login

OpenID Connect compatible login that lets third-party apps authenticate Battle.net users

Static and Dynamic Namespaces

Game Data APIs are partitioned by namespace (static-, dynamic-, profile-) to separate patch-stable reference data from live state

Auction House Data

Endpoint exposing live World of Warcraft auction house listings per connected realm

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

JSON-LD contexts and semantic vocabularies used across these APIs.

Blizzard Entertainment Context

38 classes · 9 properties

JSON-LD

Spectral Rules 1

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Blizzard Entertainment API Rules

5 rules · 2 errors · 3 warnings

SPECTRAL

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Blizzard Entertainment Authentication

http · 1 scheme

SECURITY

Blizzard Entertainment Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

Recommended x-agentic-access execution contracts for AI agents.

Blizzard Entertainment Agentic Access

26 operations · 2 acting

26 operations · 2 acting

AGENTIC

Use Cases 5

What developers actually build with this provider — captured so the catalogue answers 'what is this for', not just 'what does this expose'.

What developers build with this provider.

Companion Apps

Build mobile and web companion apps that surface character, guild, ladder, and profile data

Theorycrafting and Stats Sites

Power character optimizer, mythic-plus rank tracker, and deck-tracker sites with first-party data

Esports Tooling

Pull ladder and seasonal data for esports brackets, statistics, and broadcast overlays

Add-on and Mod Ecosystems

Provide authoritative reference data to community add-on libraries and mod managers

Account Linking

Let players authenticate with their Battle.net account in third-party communities and tournament platforms

Integrations 3

Pre-built integrations with other platforms tell you where this provider already fits in a stack.

Pre-built integrations with other platforms and tools.

Discord

Battle.net account linking is widely combined with Discord OAuth for community gating

Twitch

Companion overlays and stream tools surface live ladder and profile data

Raider.IO

Community service that aggregates WoW profile and mythic-plus data via the Game Data API

Resources

Every other property we hold for Blizzard Entertainment — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Get Started 2

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

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Build 1

SDKs, sample code, and the tooling you integrate with

Access & Security 4

Authentication, authorization, and security posture

Operate 2

Status, limits, changes, and where to get help

Company 2

The organization behind the API

← All providers · Data indexed from github.com/api-evangelist/blizzard-entertainment · machine-readable index on apis.io