Brickfact
Find LEGO sets, compare retailer offers and check recorded price history before you buy.
Connects to Brickfact's LEGO catalogue and monitored retailer offers. Muse can search sets by name, number, theme, budget or piece count, compare offers with shipping, look up retirement info, review recorded retail price history and show shopping cards or side-by-side comparisons.
Try asking Muse: "Find retiring LEGO sets under 100 dollars and tell me which one has the best price right now."
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Source: Found in the official MCP Registry (io.github.brickfact-com/brickfact) · First listed November 9, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 60 min ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://mcp.brickfact.com/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Also use it in ChatGPT or Claude
Brickfact is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
Add it to ChatGPT
- 1
Open ChatGPT settings
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
- 2
Turn on developer mode
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
- 3
Create the connector
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
- 4
Use it in a chat
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
Add it to Claude
- 1
Open Claude settings
In Claude, open Settings, then Connectors.
- 2
Add a custom connector
Choose Add custom connector, give it a name, and paste the link.
- 3
Connect and use it
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://mcp.brickfact.com/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 213ms. Worked in n/a of checks over 30 days.
Screening · November 9, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 11
search_setsFind sets by name or number, theme IDs, budget, pieces, age recommendation or retirement status. Use price_basis delivered for budgets including shipping; item preserves the original item-only search. Delivered search excludes unknown shipping before pagination. Returns links to get_set_detailsLook up a set's specifications, retirement information and monitored offers. Future retirement dates are estimates. Reported shipping totals and unverified stock are explicitly labelled.get_set_offersFind monitored retailer offers for one set in a supported market. Compare item prices and reported shipping totals. Unknown shipping is not free shipping. Results do not guarantee stock or checkout prices.compare_setsCompare specifications, retirement status and monitored offers for two to four distinct set numbers in the same retailer market.get_price_historyOnly for explicit collector, resale or sealed-set market-valuation requests. For price history, price development, Preisentwicklung or past shop prices, call get_retail_price_history first. Never use this tool as a fallback for partial or unavailable retailer history. Values are list_themesFind catalogue theme IDs and names, optionally by text. Theme IDs can be used to narrow a set search.get_retail_price_historyFirst choice for price history, price trends, Preisentwicklung and past merchant prices. Read recorded delivered retailer prices in the selected market and currency. Use days 365 for the last 12 months. Partial coverage is valid history: show available observations and actual datassess_dealCompare the freshest known delivered offer with the recorded retail low and show coverage. No all-time-low claims or predictions. History excludes Amazon; current offers can include Amazon.find_alternativesFind curated related sets, optionally cheaper by delivered price or with fewer pieces, and optionally within a delivered-price budget. Candidate coverage is bounded; fewer pieces does not establish physical dimensions.render_setsAfter searching or choosing sets, show the final one to six set IDs as shopping cards, or two to four as a side-by-side comparison. Includes images, reported delivered prices, card shortlist and app handoffs. Data remains available without UI.get_app_handoffGet the existing app link and steps for setting a price alert or saving a set to a Brickfact watchlist. This read-only handoff does not create anything. A target_price is an optional draft in the market currency; the user completes the action in the app.Link
https://mcp.brickfact.com/mcpQuestions about Brickfact in Muse
How do I connect Brickfact to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Brickfact to help me. It is a free service with an MCP server at https://mcp.brickfact.com/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is Brickfact working right now?
At the last check (November 9, 2026, 07:56 UTC) the endpoint was working, answering in 213ms. It is checked every 15 minutes.
Is Brickfact safe to connect to Muse?
It was screened on November 9, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can Brickfact do in Muse?
It exposes 11 tools, including search_sets, get_set_details, get_set_offers, compare_sets. For example, you could ask Muse: "Find retiring LEGO sets under 100 dollars and tell me which one has the best price right now."
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This listing was added from public sources (Found in the official MCP Registry (io.github.brickfact-com/brickfact)). If you build Brickfact, claim it to correct the details and get your badge.
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