Hearthstone API
Browse all Hearthstoneapi APIs★ Only Publicly Available OpenAPI DocumentMediaContent DeliveryapiKey11 EndpointsREST
For Agents
Look up Hearthstone cards, card backs, and game metadata by name, class, set, race, quality, type, or faction across 11 read-only endpoints.
Use for: Find a Hearthstone card by its exact name, Search for Hearthstone cards that match a partial name, List all Mage class cards in the current Standard set, Retrieve every card back available in Hearthstone
Not supported: Does not handle live game state, player accounts, deck submission, or matchmaking — use for static card and metadata lookups only.
Jentic publishes the only available OpenAPI specification for Hearthstone API, keeping it validated and agent-ready. The Hearthstone API exposes Blizzard's Hearthstone card catalog as structured JSON covering individual cards, card backs, and master metadata such as classes, sets, races, qualities, types, and factions. Agents can fetch cards by name, browse them by class or set, search by partial name, and pull the full game info block in a single call. The service is hosted on the RapidAPI gateway and is read-only — it does not accept user-generated content or game state.
Install Jentic One Beta
Connect the Hearthstone API to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Hearthstone API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.
Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.
1
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register # connects your agent to your Jentic One instanceJentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.
Capabilities
What an agent can do with Hearthstone API.
Retrieve a Hearthstone card by exact name from /cards/{name}
Search the card pool by partial name match using /cards/search/{name}
List every card belonging to a given class, set, race, quality, type, or faction
Pull the full Hearthstone game metadata block (classes, sets, types, factions, qualities, races) from /info
Enumerate all Hearthstone card backs available in the game via /cardbacks
Filter card results by collectibility and locale through query parameters on the cards endpoints
Use Cases
Patterns agents use Hearthstone API for, with concrete tasks.
★ Deck Builder Card Lookup
A community deck-building tool needs to render card images, mana costs, and abilities as users add cards to a deck. The Hearthstone API supplies the canonical card record by name including text, attack, health, cost, and image URLs, so the builder never has to maintain a local card database. Lookups are single GET calls with sub-second latency.
Call GET /cards/Ragnaros%20the%20Firelord and return the card's mana cost, attack, health, and card text
Class and Set Browsing
A meta-tracking site groups cards by class and set to power filterable browse pages. The /cards/classes/{class} and /cards/sets/{set} endpoints return every card in a given class or expansion in a single response, removing the need for client-side filtering across the full card list.
List every card in the Hearthstone Classic set by calling GET /cards/sets/Classic
Card Search Autocomplete
An in-browser search box suggests cards as a user types. The /cards/search/{name} endpoint returns all cards whose names contain the supplied substring, making it suitable as an autocomplete backend without needing local indexing.
Search for all Hearthstone cards whose name contains 'dragon' by calling GET /cards/search/dragon
AI Agent Hearthstone Assistant
A Claude or GPT-based assistant answers player questions about cards, classes, and game mechanics. Through Jentic, the agent searches for the right Hearthstone API operation by intent, loads its schema, and returns structured card data without scraping fan wikis. Integration takes minutes rather than hours of doc reading.
Search Jentic for 'look up a hearthstone card', load the operation schema, and return card data for 'Tirion Fordring'
Key Endpoints
11 endpoints — jentic publishes the only available openapi specification for hearthstone api, keeping it validated and agent-ready.
METHOD
PATH
DESCRIPTION
GET
/cards
Get all cards
GET
/cards/{name}
Get a card by exact name
GET
/cards/search/{name}
Search cards by partial name
GET
/cards/classes/{class}
List cards by class
GET
/cards/sets/{set}
List cards by set
GET
/info
Get game metadata for valid filter values
GET
/cardbacks
List all card backs
GET
/cards
Get all cards
GET
/cards/{name}
Get a card by exact name
GET
/cards/search/{name}
Search cards by partial name
GET
/cards/classes/{class}
List cards by class
GET
/cards/sets/{set}
List cards by set
GET
/info
Get game metadata for valid filter values
GET
/cardbacks
List all card backs
Why Jentic?
Three things that make agents converge on Jentic-routed access.
Credential isolation
The RapidAPI key (X-RapidAPI-Key header) is stored encrypted in the Jentic vault. Agents receive scoped access tokens at execution — the raw key never enters the agent's prompt or memory.
Intent-based discovery
Agents search by intent (e.g. 'look up a hearthstone card') and Jentic returns the matching operation with its input schema, so the agent can call /cards/{name} or /cards/search/{name} directly without browsing RapidAPI docs.
Time to first call
Direct integration: roughly half a day to set up the RapidAPI account, key handling, and error recovery. Through Jentic: under 15 minutes — search, load, execute.
Related APIs
Alternatives and complements available in the Jentic catalogue.
Alternative
IGDB API
IGDB is a general game database — broader than Hearthstone's card-only catalog
Pick IGDB when an agent question spans multiple games; pick Hearthstone API for card-level detail
FAQs
Specific to using Hearthstone API through Jentic.
Why is there no official OpenAPI spec for Hearthstone API?
Hearthstone API does not publish an OpenAPI specification of its own. Jentic generates and maintains this spec so that AI agents and developers can call Hearthstone API via structured tooling. It is validated against the live RapidAPI endpoint and kept up to date. Get started at https://app.jentic.com/sign-up.
What authentication does the Hearthstone API use?
The API is hosted on RapidAPI and authenticates via the X-RapidAPI-Key header. Through Jentic, the RapidAPI key is held in the encrypted vault and the agent receives scoped access at call time.
Can I search Hearthstone cards by partial name with this API?
Yes. GET /cards/search/{name} returns every card whose name contains the supplied substring, suitable for autocomplete and fuzzy lookup flows.
What are the rate limits for the Hearthstone API?
Rate limits are set on the RapidAPI plan attached to your key — the free Basic plan typically allows around 500 requests per month with a hard ceiling on requests per second. Check your RapidAPI dashboard for the exact quota.
How do I look up a card by name through Jentic?
Run pip install jentic, have the agent search for 'look up a hearthstone card by name', load the GET /cards/{name} operation, and execute it with the card name as the path parameter.
Does the Hearthstone API include card images?
Yes. Card responses include image URLs for both the standard and gold card art, returned alongside name, mana cost, attack, health, and card text on the /cards endpoints.
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