Creations3D docs: MCP server and REST API

Docs · Updated 28 October 2026

Creations3D turns a text description or a photo into a 3D model file at real size: GLB for games and the web, STL and 3MF for 3D printing, OBJ, and FBX for quad models. People use it on the website or from their AI assistant through a remote MCP server.

These docs are for AI agents and the developers who set them up. Your assistant can use Creations3D through the remote MCP server at https://creations3d.com/mcp, and scripts can use the REST API with a personal API key. Both use the same account, model library and credits as the website.

Documentation pages

• Quickstart: your first 3D model in 2 minutes: Make your first real-size 3D model from an AI assistant over MCP, or from a script with one REST call. Exact commands, prompts and credit costs.
• MCP server reference: The Creations3D remote MCP server: endpoint, transport, OAuth sign-in, the six tools with every input and output field, credit costs, limits and errors.
• File formats, units and print reports: GLB, STL, 3MF, OBJ and FBX from Creations3D: units and axes, size, triangle budgets, the print repair and every field of the print report.
• REST API reference: The Creations3D REST API with a personal API key: create, list, read and delete models, read your credits. Fields, examples and error codes.

MCP or REST: which should I use?

Connect an assistant

• Claude: Customize, Connectors, + Add, Add custom connector. Name it Creations3D, paste the address and sign in. Claude setup guide
• ChatGPT: chatgpt.com/plugins, Add, Add custom MCP server. Keep Server URL, paste the address, keep OAuth, tick I understand and want to continue, Create as a plugin, then Connect Creations3D, sign in and Allow access. ChatGPT setup guide
• Claude Code: Run once, then /mcp to sign in. Claude Code setup guide
  claude mcp add --transport http --scope user creations3d https://creations3d.com/mcp
• Codex: Run once, then sign in. Codex setup guide
  codex mcp add creations3d --url https://creations3d.com/mcp codex mcp login creations3d
• Cursor: Add to .cursor/mcp.json (or ~/.cursor/mcp.json), switch it on and sign in. Cursor setup guide
  { "mcpServers": { "creations3d": { "url": "https://creations3d.com/mcp" } } }

Sign-in

• Browser sign-in (OAuth): Claude, ChatGPT, Claude Code, Codex, Cursor sign in with the user's Creations3D email when the server is added. No API key needed. Discovery: https://creations3d.com/.well-known/oauth-protected-resource/mcp.
• API key: for scripts, CI or tools without browser sign-in, the account owner creates a key in Account, API keys, and sends it as Authorization: Bearer c3d_sk_....

Credits

Building models uses credits from a Creations3D plan. New accounts start with a $1, 7-day trial with 40 credits; plans run from $20 to $100 a month. Plans are started and managed by the account owner on the website, never through the MCP tools.

• Game-ready model (light GLB): 4 credits
• Model from a photo: 6 credits
• Standard model (printing and renders): 8 credits
• Resizing and exporting to STL, 3MF or OBJ: free

See pricing for plans.

Good to know

• A model usually takes about 1.5 minutes once it starts; queueing can add a few minutes. At most two models per account are worked on at once.
• GLB files use metres; STL and 3MF use millimetres.
• Download links are signed and expire after 15 minutes. Call get_model or export_model for fresh ones.
• USDZ is not available. Wall thickness and print overhangs are not checked.
• If a build fails, its credits go back to the account automatically.

Guides

• How to generate a 3D model in Claude
• three.js-ready GLB from a text description
• How to make an STL for 3D printing with ChatGPT
• Meshy MCP alternative (2026): Creations3D compared

Machine-readable docs

• /llms.txt: index of every public page as Markdown.
• /llms-full.txt: every public page in one file.
• Add .md to any public page URL (this page is /docs.md, the home page is /index.md), or request the page with Accept: text/markdown.