Know your model inside out.

Get a clear report on a 3D model: how big it is, what it's made of and whether its surface is closed.

Try in browser Developer docs

From 10 credits300 free credits to start

Available

MCP tool: inspect_3d_model

Before

cube.glbOne cube mesh

After

8 vertices · 12 triangles

summary.txt
inspection.json

A9Inspect a 3D modelExample: a simple cube. Counts include every copy of a mesh; topology checks do not certify printability.

A checkup for your 3D model.

See how many objects, triangles and materials a model has, how large it is, and whether any textures are missing. Find holes and loose edges before you split, share or ship it. You get a short summary and a detailed report, and the model itself is never changed.

A real report on a real model. Drag to turn it; the labels stay on its bounding box.

Interactive 3D model of a lounge chair with its measured width, height and depth — inspect_3d_model on a lounge chair made by optimize_3d_model. The labels sit on the bounding box the report measured, and the figures are its own; topology is counted after merging exactly coincident vertices.

Formats: .glb .gltf .obj .ply .stl .off .blend
Outputs: inspection.json and summary.txt
Dimensions: World-space bounds; units unknown when unspecified
Topology: Components, boundary edges, non-manifold edges, degenerate faces and watertightness
Blender: Evaluated meshes; pack resources into the file

The whole picture.

Objects, triangles, materials and textures, counted in one pass.

Size it up.

Real-world dimensions and units, whenever the file records them.

Spot the gaps.

Holes, loose edges and broken faces show up before they cause trouble.

Pay by the job.

Costs 10 credits up to 50,000 faces, 25 credits up to 200,000 faces. A job that fails costs nothing.

Pricing details

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Available now

300free credits when you sign up

Every MCPBytes tool, one credit balance
Sign in with GitHub or email, no card required
Each tool states its price before you run it
Failed API jobs cost nothing

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Price per job

Inspect a 3D model

Up to 50,000 faces: 10 credits
Up to 200,000 faces: 25 credits

Limits by accountFreePay as you goMonthly bundle

Limits by account

Largest model: Free200,000 faces; Pay as you go2,000,000 faces; Monthly bundle2,000,000 faces
Jobs at once: Free3 jobs; Pay as you go5 jobs; Monthly bundle8 jobs
Results kept: Free1 day; Pay as you go7 days; Monthly bundle30 days
Largest upload: Free50 MB; Pay as you go100 MB; Monthly bundle100 MB
Longest run: Free10 min; Pay as you go14 min 30 s; Monthly bundle14 min 30 s

Free until your first purchase; any credit pack moves you to Pay as you go; a monthly bundle while it lasts. Compare accounts

Your agent or your code.

Connect your agent and it can use this tool right away, or call it from your own code. One key works for both.

Start a job

Send a file body, or JSON containing an upload ID or public URL. No tool-specific options are needed.

Requestinspect.sh

curl "https://api.mcpbytes.com/v1/tools/inspect_3d_model/jobs?filename=cube.glb" \
  -H "Authorization: Bearer $MCPBYTES_API_KEY" \
  --data-binary @cube.glb

Response202 Accepted · trimmed

{
  "tool": "inspect_3d_model",
  "status": "queued",
  "options": {},
  "result": null
}

Get the result

Poll until the status is final. Download files only after success.

Requestread.sh

# JOB_ID is the id from the create response
curl "https://api.mcpbytes.com/v1/jobs/$JOB_ID" \
  -H "Authorization: Bearer $MCPBYTES_API_KEY"

# Once status is succeeded, read the report
curl "https://api.mcpbytes.com/v1/jobs/$JOB_ID/files/inspection.json" \
  -H "Authorization: Bearer $MCPBYTES_API_KEY"

Response200 OK · trimmed

{
  "tool": "inspect_3d_model",
  "status": "succeeded",
  "result": {
    "schema_version": 1,
    "object_count": 1,
    "mesh_instance_count": 1,
    "vertex_count": 8,
    "face_count": 12,
    "details_truncated": false,
    "notes": []
  }
}

MCP

Connect once. Your agent calls inspect_3d_model and gets the download URLs back. This endpoint has only this tool's family, which keeps your agent's tool list short; one endpoint has every tool.

Claude CodeOAuth or API key

The first form signs in through the browser when you run /mcp. In .mcp.json (project root), ${MCPBYTES_API_KEY} is read from the environment when Claude Code connects. Claude Code docs

claude mcp add --transport http mcpbytes \
  https://api.mcpbytes.com/mcp/3d

Codex (CLI, IDE extension, ChatGPT desktop)OAuth or API key

Codex reads the key from the environment variable each time it connects. The same table can go in ~/.codex/config.toml by hand; codex mcp add has no --header flag. Codex docs

codex mcp add mcpbytes --url https://api.mcpbytes.com/mcp/3d \
  --bearer-token-env-var MCPBYTES_API_KEY

CursorOAuth or API key

~/.cursor/mcp.json (all projects) or .cursor/mcp.json (one project). Remote servers take no "type". Without the header, the client signs you in with GitHub or an email link (OAuth). Cursor docs

~/.cursor/mcp.json

{
  "mcpServers": {
    "mcpbytes": {
      "url": "https://api.mcpbytes.com/mcp/3d",
      "headers": {
        "Authorization": "Bearer ${env:MCPBYTES_API_KEY}"
      }
    }
  }
}

11 more clients in the docs →

MCP tools

inspect_3d_model: Inspects a 3D model without segmentation or repair. Returns counts, bounds, units, resources and topology checks in inspection.json, with summary.txt inline. Compares stored topology with exactly coincident vertices merged per mesh. Supports .glb .gltf .obj .ply .stl .off .blend. Give upload_id or a public https url. Waits up to wait_seconds for the result. Costs 10 credits up to 50,000 faces, 25 credits up to 200,000 faces.
create_upload: Returns a one-hour URL to PUT a local file to; then call the tool with the upload_id.
get_job: Status and results of a job; waits up to wait_seconds for it to finish.
cancel_job: Cancel a queued job or a workflow whose can_cancel is true; repeated calls never delete results.
list_jobs: Your most recent jobs, newest first.
read_job_file: Reads a text output (.txt .json .md .csv) of a succeeded job in chunks.

Full reference: inputs, options, outputs, limits and errors

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