If you are building something for the Murder Mystery 2 community — a Discord bot, a trading tool, a value tracker, or a marketplace — you need accurate item data. The RBLXValue API gives you direct access to our full MM2 database with a simple REST interface that takes minutes to integrate.
What Data Is Available?
The API currently exposes three endpoints covering the most useful data for MM2 developers.
Items
The /api/v1/items endpoint returns MM2 items with values from both MM2Values and Supreme Values, plus an estimated combined value, category, type, demand rating, and stability. You can query a specific item by slug, filter by category, search by name, or paginate through the full catalog.
GET /api/v1/items?slug=seer
GET /api/v1/items?category=godly&limit=50
GET /api/v1/items?search=chromaSets
The /api/v1/sets endpoint returns MM2 sets with total value, item count, and — when you request a specific set by slug — the full list of items it contains with individual values. This is useful for building set calculators or displaying complete set information.
GET /api/v1/sets
GET /api/v1/sets?slug=chroma-evergreen-setProfiles
The /api/v1/profile endpoint returns RBLXValue user profiles by Roblox username. This includes display name, avatar, inventory value, item count, join date, and highest badge. The profile endpoint requires a paid or marketplace API key.
GET /api/v1/profile?username=UN6107617Authentication
All API requests require an API key in the X-Api-Key header. You can create a free key at rblxvalue.com/developer after logging in with your Roblox account. Free keys support 30 requests per minute which is enough for most personal projects and small bots.
X-Api-Key: rbx_your_key_herePlans and Rate Limits
We offer three tiers depending on how much traffic your project needs.
- Free — 30 requests per minute, 1 key, footer credit required
- Paid (€9,99/mo) — 1,000 requests per minute, up to 3 keys, no credit required
- Marketplace (€24,99/mo) — 5,000 requests per minute, up to 3 keys, no credit required
The free tier is intentionally generous for personal use. The paid tiers are designed for production bots, public-facing tools, and marketplaces that need reliable high-volume access without rate limit errors.
What Can You Build With It?
The API is already powering the official RBLXValue Discord Bot, but there are plenty of other use cases.
- Discord bots — let members look up item values, compare trade offers, or track set prices directly in your server
- Trade calculators — build a web or app-based calculator that pulls live values and calculates fair trade ratios
- Price trackers — monitor specific items over time and alert users when values change significantly
- Marketplaces — integrate value data into your MM2 marketplace to help buyers and sellers price items correctly
- Inventory tools — let users import their MM2 inventory and calculate total value automatically
Free Plan Requirements
If you use the free plan, we ask that you include a small credit in your bot or app — something like "Data from rblxvalue.com" in the embed footer or a link in your project description. This helps us grow the platform so we can keep the API free for small projects.
Getting Started
Getting your first API key takes less than a minute. Log in with your Roblox account, create a key, and start making requests. The full documentation including all parameters and response formats is available on the developer page.