Introduction
The Auction House API unlocks programmatic access to auction data—empowering you to build bots that scan prices and undercut competitors automatically. This article covers the API’s basics, outlines a sample undercut algorithm, and provides best practices for deploying a reliable, compliant undercutting tool.
AH API Basics
Key API endpoints (using Blizzard’s Modern Game Data & Character Data APIs):
- /data/wow/connected-realm/{id}/auctions: Retrieves current auction listings for a connected realm.
- /data/wow/item/{id}: Fetches item metadata, including vendor sell price and item level.
- /data/wow/auctions/summary: Provides summary statistics such as min, max, and avg price.
Authentication via OAuth2 is required—register your client, obtain a token, and include it in request headers.
Automating the Undercut
Basic algorithm steps:
- Fetch current auctions for your realm.
- Filter by item(s) you want to flip.
- Calculate target undercut price:
min_price * 0.995(0.5% undercut). - Place new auction with your quantity and undercut price via
/commerce/auctions/connected-realm/{id}endpoint. - Monitor existing auctions periodically (e.g., every 5 minutes) and relist as needed.
Deployment & Best Practices
- Rate Limiting: Respect API limits—cache results and use conditional requests to avoid throttle.
- Error Handling: Implement retries with exponential backoff for network or 429 errors.
- Ethical Considerations: Avoid dumping large stacks that crash markets; aim for moderate flips that benefit both seller and buyer.
- Security: Securely store OAuth tokens and rotate them periodically.
Conclusion & Endpoint Summary
Automating your undercut strategy via the AH API can yield consistent gold gains with minimal manual effort. By following authentication protocols, adhering to rate limits, and crafting a robust algorithm, you’ll dominate your server’s marketplace ethically and efficiently.
API Endpoint Quick Reference
| Endpoint | Purpose | Method | Notes |
|---|---|---|---|
| /auctions | Fetch listings | GET | Paginated; use timestamp |
| /auctions/summary | Price stats | GET | Use for min/avg calculations |
| /auctions/{itemId} | Item metadata | GET | Fetch vendor price |
| /auctions/post | Create auction | POST | Requires auth & payload |
