Caliper

fit.caliper/caliper

Need to pull triangle counts, bounding boxes, or point cloud stats from 3D files without spinning up your own parser? This server accepts STL, OBJ, PLY, PCD, LAS/LAZ, and glTF/GLB files via URL or base64 and returns structured metadata: manifold analysis, surface area, vertex counts, material lists, classification breakdowns. It exposes tools like caliper_auto_stats for format detection and extraction, plus caliper_batch_stats for processing up to 10 files in one call. Files under 150KB are free with no auth required. Larger files cost $0.02/MB via USDC on Base or Stripe. Useful for validating CAD uploads, pre-flight checks in 3D pipelines, or quick geometry audits without heavyweight dependencies.

tools: 10
transport: HTTP
last updated: Mar 31, 2026

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Install

From registry metadata

$ npx add-mcp https://caliper.fit/mcp/ --name caliper

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

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

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 10 tools

Verified live against the running server on Nov 6, 2026.

format_detectDetect 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/privacy1 params

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

Parameters* required

filename*string

Filename or URL to check. The format is detected from the file extension.

feature_requestRequest 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...1 params

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...

Parameters* required

description*string

A short description of the feature or format you need. Examples: 'STEP file support', 'volume comparison between two files', 'export to USD format'. This helps prioritize development.

format_autoAuto-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...4 params

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...

Parameters* required

file_b64value

Base64-encoded file content. Max 200KB decoded. Use file_url for larger files to avoid consuming model context window budget. Default: null (omit if providing file_url instead).

file_urlvalue

HTTP/HTTPS URL of the geometry file to analyze. Preferred for large files (over 200KB). The file format is detected from the URL path extension, so the filename parameter is not needed when using f...

filenamevalue

Original filename with extension (e.g. 'model.stl'). Required for format detection when using file_b64. Not needed when using file_url (format is detected from the URL path). Default: null.

paymentvalue

Payment proof as a JSON string. Set this when retrying after a payment_required response. For x402: must contain 'transaction' (on-chain tx hash), 'network', and 'priceToken' from the payment_requi...

format_stlExtract 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...4 params

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...

Parameters* required

file_b64value

Base64-encoded file content. Max 200KB decoded. Use file_url for larger files to avoid consuming model context window budget. Default: null (omit if providing file_url instead).

file_urlvalue

filenamevalue

Original filename with extension (e.g. 'model.stl'). Required for format detection when using file_b64. Not needed when using file_url (format is detected from the URL path). Default: null.

paymentvalue

format_objExtract 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 paymen...4 params

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 paymen...

Parameters* required

file_b64value

Base64-encoded file content. Max 200KB decoded. Use file_url for larger files to avoid consuming model context window budget. Default: null (omit if providing file_url instead).

file_urlvalue

filenamevalue

Original filename with extension (e.g. 'model.stl'). Required for format detection when using file_b64. Not needed when using file_url (format is detected from the URL path). Default: null.

paymentvalue

format_plyExtract 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 (St...4 params

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 (St...

Parameters* required

file_b64value

Base64-encoded file content. Max 200KB decoded. Use file_url for larger files to avoid consuming model context window budget. Default: null (omit if providing file_url instead).

file_urlvalue

filenamevalue

Original filename with extension (e.g. 'model.stl'). Required for format detection when using file_b64. Not needed when using file_url (format is detected from the URL path). Default: null.

paymentvalue

format_pcdExtract 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 (...4 params

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 (...

Parameters* required

file_b64value

Base64-encoded file content. Max 200KB decoded. Use file_url for larger files to avoid consuming model context window budget. Default: null (omit if providing file_url instead).

file_urlvalue

filenamevalue

Original filename with extension (e.g. 'model.stl'). Required for format detection when using file_b64. Not needed when using file_url (format is detected from the URL path). Default: null.

paymentvalue

format_lasExtract 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 vi...4 params

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 vi...

Parameters* required

file_b64value

Base64-encoded file content. Max 200KB decoded. Use file_url for larger files to avoid consuming model context window budget. Default: null (omit if providing file_url instead).

file_urlvalue

filenamevalue

Original filename with extension (e.g. 'model.stl'). Required for format detection when using file_b64. Not needed when using file_url (format is detected from the URL path). Default: null.

paymentvalue

format_gltfExtract 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 vi...4 params

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 vi...

Parameters* required

file_b64value

Base64-encoded file content. Max 200KB decoded. Use file_url for larger files to avoid consuming model context window budget. Default: null (omit if providing file_url instead).

file_urlvalue

filenamevalue

Original filename with extension (e.g. 'model.stl'). Required for format detection when using file_b64. Not needed when using file_url (format is detected from the URL path). Default: null.

paymentvalue

format_batchAnalyze 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 (...2 params

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 (...

Parameters* required

files*string

JSON array of file descriptors. Each object has optional keys: "file_url" (HTTP/S URL), "file_b64" (base64 string), "filename" (for format detection). Provide either file_url or file_b64 per file....

paymentvalue

Details

Website: caliper.fit
Transport: HTTP
Registry: MCP registry, active
Resources: 1
Prompts: 2
Tools verified: Nov 6, 2026