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free-3d-assets

free-3d-assets

by codepawl
OverviewSchemaSourceRelated ServersDiscussionsAdmin
JavaScript
Hybrid

Free 3D assets for AI agents (MCP)

An MCP server that lets any AI agent find free 3D assets and use them right away. Ask for "a wooden chair, 0.8 m" and get a GLB URL, the real size in metres, the licence and a credit line to paste into the project.

  • 75,509 assets from 15 GLB packs on Hugging Face and 5 libraries.

  • 41,292 have a ready GLB: web, KTX2, LOD, mobile, engine and collision tiers.

  • Sizes in metres where the source knows them, and the file's units where it does not.

  • Every result names its licence. CC BY results come with a ready credit line.

Add it

Hosted (nothing to install):

claude mcp add --transport http free-3d-assets https://assets.codepawl.com/mcp

Other clients take the same URL:

{ "mcpServers": { "free-3d-assets": { "url": "https://assets.codepawl.com/mcp" } } }

Local, over stdio, with no server of ours in the loop:

claude mcp add free-3d-assets -- npx -y github:codepawl/asset-gate

The local server reads the same index from Hugging Face, caches it in ~/.cache/codepawl-asset-gate and hands out direct Hugging Face URLs.

Related MCP server: polyhaven-mcp

Tools

Tool

Does

search_assets

Plain words plus filters: kind, licence (cc0, shippable), no_share_alike, glb_only, size_m or min_size_m/max_size_m, real_size_only, style, rigged, animated, no_ai_generated, sources. A size in the words ("rock 2 m") becomes a size filter.

get_asset

GLB URL, every tier with the decoders it needs (MeshoptDecoder, KTX2Loader, measured per pack), a three.js load snippet, size, licence, licence URL, author and credit line. The default tier is the one that needs the fewest decoders. Poly Haven assets give glTF, HDRI or texture URLs; Megascans gives a Fab link only.

list_sources

Every pack and library with counts, licences and scale.

find_elsewhere

Search links for Poly Haven, ambientCG, Poly Pizza, Sketchfab, Smithsonian, NASA, Kenney, OpenGameArt and Fab when nothing fits.

examples/reading-corner is a three.js scene that an agent built with these tools alone.

The hosted gate also answers plain HTTP: /api/search?q=wooden%20chair&glb_only=true, /api/asset/<id>, /api/sources, /api/elsewhere?q=.

Sources

Source

Assets

Licence

Files

Amazon Berkeley Objects

7,953

CC BY 4.0

GLB, real metres

Google Poly archive

9,971

CC BY 3.0

GLB, longest side 1 unit

Objaverse (CC0 and CC BY)

6,015

CC0 / CC BY 4.0 per model

GLB, longest side 1 unit

Pixel Art Atlas 3D

6,194

CC0

GLB

Smithsonian Open Access

3,451

CC0

GLB

NVIDIA SimReady

2,595

CC BY 4.0

GLB with physics, real metres

0 A.D. art

1,670

CC BY-SA 3.0

GLB, many animated

Google Scanned Objects

1,033

CC BY 4.0

GLB, real metres

100STYLE motion clips

810

CC BY 4.0

rigged GLB clips

PLATEAU Japan city tiles

797

CC BY 4.0

GLB, real metres

Mars HiRISE terrain

320

public domain

GLB, real metres

NASA 3D Resources

256

no US copyright

GLB

World Fish

121

CC0

GLB

MuJoCo Menagerie robots

79

MIT / Apache / BSD per robot

GLB, real metres

CT anatomy

27

CC BY 4.0

GLB

Poly Haven

2,387

CC0

glTF, HDRI and texture URLs from the Poly Haven API

ambientCG

2,917

CC0

zip downloads

Kenney

4,434

CC0

inside the kit zip

Quaternius

1,783

CC0 (one pack link-only)

pack download

Quixel Megascans

22,696

Fab Standard Licence

link to Fab only

Megascans files are licensed by Fab to each user and are never hosted or passed on here. The full licence notes per source are in RESEARCH.md.

How it works

scripts/build-index.mjs turns every pack's metadata.jsonl and the asset-index table into a sharded index: asset records in blocks of 100, word postings in 1,024 buckets and one 32-bit number of facets per asset. A search reads the buckets for its words and the small card blocks of its top results, so an MCP call takes about 2 ms of Worker CPU (median, measured on 2026-11-12). GLB links are 302 redirects to Hugging Face; nothing is proxied.

npm run fetch      # download the metadata
npm run build      # build dist/site (index + landing page)
npm run probe      # read the glTF extensions each pack tier requires
npm test           # tests over the built index
npm run check-urls # HEAD a few files of every source and tier
npm run deploy     # Cloudflare Worker

Credits

Poly Haven content comes through the Poly Haven API: Powered by Poly Haven. Each asset keeps its own licence; use the credit line get_asset returns. Code: MIT.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

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    Maintenance

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    Resources

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