Caliper MCP Server

fit.caliper/caliper

answering

Caliper is answering right now. Last checked 5 min ago. It exposes 10 tools.

Geometry and CAD file metadata extraction for STL, OBJ, PLY, PCD, LAS/LAZ, glTF/GLB.

Uptime history 42 hours of history

42 hours agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

375 ms

Response time

average over 24h

open, no key

Access

streamable-http

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add caliper --transport http https://caliper.fit/mcp/

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "caliper": {
      "url": "https://caliper.fit/mcp/"
    }
  }
}

~/.codex/config.toml

[mcp_servers.caliper]
url = "https://caliper.fit/mcp/"

.cursor/mcp.json

{
  "mcpServers": {
    "caliper": {
      "url": "https://caliper.fit/mcp/"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "caliper": {
      "url": "https://caliper.fit/mcp/"
    }
  }
}

Available tools 10

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

format

format_auto

Auto-detect geometry file format and extract metadata statistics. Accepts a 3D geometry file via URL or base64 and returns structured metadata: bounding boxes, triangle counts, manifold analysis, point cloud statistics, and more. This is a read-only analysis tool — it does not perform mesh repair, format conversion, or boolean operations. Supported formats: STL, OBJ, PLY, PCD, LAS/LAZ, glTF/GLB. STEP and IGES support is planned. Provide either file_url (preferred for large files) or file_b64 (for files under 200KB). Include filename for format detection if using file_b64. When using file_url, the format is detected from the URL path extension; filename is not required. Files under 150KB are free. Larger files cost $0.02/MB via x402 (USDC on Base) or card via MPP (Stripe; adds $0.35 surcharge). If payment is required, the response includes payment details. Retry with the payment argument containing the payment proof. Privacy policy: https://caliper.fit/privacy

format_batch

Analyze multiple geometry files in a single batch request. Submit up to 10 files, receive a single quote, pay once, and get structured metadata for all files. Supports mixed formats. Read-only analysis — does not modify, convert, or repair files. Payment is required via x402 (USDC on Base) or card via MPP (Stripe). If no payment is provided, the response includes the total price and per-file breakdown. Retry with the payment argument containing "transaction", "network", and "priceToken". Partial success: if some files fail processing, you still receive results for the files that succeeded. Privacy policy: https://caliper.fit/privacy

format_detect

Detect the geometry file format from a filename or URL. Returns the detected format name and whether it is currently supported. Use this to check format support before making a paid analysis call. No payment required. Privacy policy: https://caliper.fit/privacy

format_gltf

Extract metadata from a glTF or GLB file. Returns asset info, scene graph structure, mesh/material/texture counts, vertex and index totals, feature flags (normals, tangents, texcoords, colors, joints), primitive modes, and extensions. Payment via x402 (USDC on Base) or card via MPP (Stripe). See format_auto for payment flow details. Privacy policy: https://caliper.fit/privacy

format_las

Extract metadata from a LAS or LAZ point cloud file. Returns LAS version, point format, point count, scale factors, offsets, bounding box, classification counts, feature flags (RGB, intensity, GPS time, waveform), and VLR information. Payment via x402 (USDC on Base) or card via MPP (Stripe). See format_auto for payment flow details. Privacy policy: https://caliper.fit/privacy

format_obj

Extract metadata from an OBJ file. Returns vertex/normal/texcoord/face counts, triangle/quad/polygon breakdown, material and group counts, bounding box, surface area, and triangulation status. Payment via x402 (USDC on Base) or card via MPP (Stripe). See format_auto for payment flow details. Privacy policy: https://caliper.fit/privacy

format_pcd

Extract metadata from a PCD point cloud file. Returns point count, field definitions, data format, organization, viewpoint, feature flags (RGB, intensity, normals, curvature), bounding box, centroid, and point density estimate. Payment via x402 (USDC on Base) or card via MPP (Stripe). See format_auto for payment flow details. Privacy policy: https://caliper.fit/privacy

format_ply

Extract metadata from a PLY file (ASCII or binary). Returns vertex/face counts, element properties, feature detection (normals, colors, texcoords, intensity, curvature), bounding box, centroid, and point cloud identification. Payment via x402 (USDC on Base) or card via MPP (Stripe). See format_auto for payment flow details. Privacy policy: https://caliper.fit/privacy

format_stl

Extract metadata from an STL file (ASCII or binary). Returns triangle count, bounding box, surface area, volume, manifold analysis (watertight, open edges, non-manifold edges), triangle quality metrics, vertex deduplication count, mean edge length, minimum bounding sphere, and a noise estimate derived from planar region fitting. Payment via x402 (USDC on Base) or card via MPP (Stripe). See format_auto for payment flow details. Privacy policy: https://caliper.fit/privacy

feature

feature_request

Request a feature or format that Caliper doesn't support yet. Free, no payment required. Use this when you need a capability that Caliper doesn't currently offer — especially unsupported file formats (STEP, IGES) or analysis features not yet available. Requests are logged and used to prioritize development. Privacy policy: https://caliper.fit/privacy

Endpoints

URL	Transport	State	Latency	Checked
https://caliper.fit/mcp/	streamable-http	answering	374 ms	5 min ago

Caliper — questions

Answers built from our own checks of this server.

What can Caliper do?

It exposes 10 tools, read directly from the server on our last check. Among them: feature_request, format_auto, format_batch, format_detect, format_gltf, format_las and 4 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Caliper working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 375 ms. The bar chart above shows every period we have measured.

How do I connect Caliper?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Caliper need an API key?

No. Caliper completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 10 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Caliper?

It answers our handshake in 375 ms on average, which is faster than 37% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.