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Preview of MOC Source

MOC Source by moc-source

Compares LEGO Pick a Brick / Bricks and Pieces prices against BrickLink store prices, right on BrickLink.com. Includes a list manager for wanted lists/carts, and a Projects tool for planning part sourcing across LEGO and BrickLink stores.

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Extension Metadata

Screenshots
Wanted list pick a brick pricingProject sourcing to find the best prices for your mocsIn store PAB pricing
About this extension
MOC Source overlays live LEGO Pick a Brick (PAB) and Bricks and Pieces (BAP) prices directly onto BrickLink.com — on wanted lists, store carts, store listings, and catalog pages — so you can see at a glance whether a part is cheaper from LEGO direct or from the BrickLink store you're browsing.

Click the toolbar icon to open the built-in list manager: import your BrickLink wanted lists and store carts, track Want/Have quantities, and compare LEGO-direct pricing part by part. The Projects workspace lets you split a wanted-list pool across multiple LEGO Pick-A-Brick carts and BrickLink store carts, auto-allocating each part to its cheapest source and tracking savings including shipping.

Price badges work on BrickLink's public pages with no account needed. Importing your own wanted lists/carts requires a free BrickLink.com account (data stays local to your browser). LEGO cart transfer requires a LEGO.com login.

Free and open source (AGPL-3.0). Built by an AFOL, for AFOLs — not affiliated with the LEGO Group or BrickLink.
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Permissions and data

Required permissions:

  • Access browser tabs
  • Access your data for store.bricklink.com
  • Access your data for www.bricklink.com
  • Access your data for www.lego.com

Optional permissions:

  • Access your data for sites in the bricklink.com domain
  • Access your data for store.bricklink.com
  • Access your data for api.moc-source.com
  • Access your data for www.lego.com
  • Access your data for www.bricklink.com

Required data collection, according to the developer:

  • Web site content
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Version
0.4.18
Size
119.1 kB
Last updated
8 days ago (19 Jul 2026)
Related Categories
  • Shopping
Licence
GNU Affero General Public Licence v3.0 only
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