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Geometry and CAD file metadata extraction for STL, OBJ, PLY, PCD, LAS/LAZ, and glTF/GLB formats.
Do not connect
A critical issue was found. Do not connect this server as-is.
Scanned 1 month ago Due for re-check
A server can change after it's graded. Re-run the automated scan to refresh this report.
This grade is deterministic and reproducible: the same server surface always yields the same grade under a given algorithm version. It is a real automated assessment computed by the MCPGrade engine from what the probe actually observed — not a fabricated or opinion score. It is not a manual human pentest, so it can miss context-specific risks.
Every signal below was measured directly by the automated probe. The grade is derived only from evidence like this — nothing is assumed.
The Caliper MCP server exposes 10 tools, focused primarily on general-purpose capabilities. Its published description reads: "Geometry and CAD file metadata extraction for STL, OBJ, PLY, PCD, LAS/LAZ, and glTF/GLB formats". It communicates over Streamable HTTP using the 2025-06-18 protocol revision, and does not require authorization to connect. MCPGrade currently rates Caliper F — a critical issue was found and the server should not be connected as-is. Its most notable findings include "Data-exfiltration parameters" and "Data-exfiltration parameters". This report is a deterministic, reproducible automated assessment: the same observed surface always yields the same grade under a given algorithm version, and it is refreshed as new scans arrive and free to read — but it is not a substitute for a manual human security review. Always re-check Caliper's advertised tools, transport security, and authorization posture before connecting an autonomous agent or sharing sensitive context with it.
Add Caliper to an MCP client using the endpoint below. Review the grade and findings above before granting an autonomous agent access.
MCP endpoint
https://caliper.fit/mcp/Streamable HTTP transport. This is the MCP endpoint, not a website — paste it into your MCP client server list rather than a browser.
Captured passively during the read-only scan. Click any value to find servers that match it.
The tools this server advertises via tools/list — names, purposes, and the parameters each accepts, exactly as enumerated read-only.
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
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
Sorted worst-first. Each finding shows its severity, what it means, its OWASP MCP Top-10 mapping, and a recommended fix — the check id links to the exact methodology row that produced it.
tool: format_auto
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
"Base64-encoded file content. Max 200KB decoded. Use file_url for larger filRecommendationRemove side-channel parameters; constrain tool inputs.
tool: format_stl
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
parameter "file_url"RecommendationRemove side-channel parameters; constrain tool inputs.
tool: format_stl
A tool description tries to alter the model’s use of another tool.
P (Stripe). See format_auto for payment flow details. Privacy policy: hRecommendationDescriptions must describe only their own tool.
tool: format_obj
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
parameter "file_url"RecommendationRemove side-channel parameters; constrain tool inputs.
tool: format_obj
A tool description tries to alter the model’s use of another tool.
P (Stripe). See format_auto for payment flow details. Privacy policy: hRecommendationDescriptions must describe only their own tool.
tool: format_ply
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
parameter "file_url"RecommendationRemove side-channel parameters; constrain tool inputs.
tool: format_ply
A tool description tries to alter the model’s use of another tool.
P (Stripe). See format_auto for payment flow details. Privacy policy: hRecommendationDescriptions must describe only their own tool.
tool: format_pcd
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
parameter "file_url"RecommendationRemove side-channel parameters; constrain tool inputs.
tool: format_pcd
A tool description tries to alter the model’s use of another tool.
P (Stripe). See format_auto for payment flow details. Privacy policy: hRecommendationDescriptions must describe only their own tool.
tool: format_las
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
parameter "file_url"RecommendationRemove side-channel parameters; constrain tool inputs.
tool: format_las
A tool description tries to alter the model’s use of another tool.
P (Stripe). See format_auto for payment flow details. Privacy policy: hRecommendationDescriptions must describe only their own tool.
tool: format_gltf
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
parameter "file_url"RecommendationRemove side-channel parameters; constrain tool inputs.
tool: format_gltf
A tool description tries to alter the model’s use of another tool.
P (Stripe). See format_auto for payment flow details. Privacy policy: hRecommendationDescriptions must describe only their own tool.
tool: format_batch
A tool exposes a free-text/webhook/feedback parameter with no honest purpose — a classic exfil channel.
org.paymentauth/credential flow. Default: null (omit on first call; set onRecommendationRemove side-channel parameters; constrain tool inputs.
The server accepts tool enumeration (and likely invocation) with no authentication.
RecommendationRequire OAuth 2.1 authorization for any server exposing non-public tools.
tool: feature_request
The description pairs a fetch imperative with a hardcoded external URL, letting the server relocate its real instructions off-metadata and mutate them after review. Fires only when a fetch verb and a URL co-occur, so benign documentation links do not.
Privacy policy: https://caliper.fit/privacyRecommendationDo not direct the model to fetch and act on external URLs; treat linked content as untrusted.
tool: format_auto
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: format_stl
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: format_stl
The description pairs a fetch imperative with a hardcoded external URL, letting the server relocate its real instructions off-metadata and mutate them after review. Fires only when a fetch verb and a URL co-occur, so benign documentation links do not.
Privacy policy: https://caliper.fit/privacyRecommendationDo not direct the model to fetch and act on external URLs; treat linked content as untrusted.
tool: format_obj
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: format_ply
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: format_pcd
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: format_las
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: format_gltf
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: format_batch
The server advertises open-world / broadly-scoped capabilities.
annotations.openWorldHint = trueRecommendationScope tools to the minimum needed.
tool: format_batch
The description pairs a fetch imperative with a hardcoded external URL, letting the server relocate its real instructions off-metadata and mutate them after review. Fires only when a fetch verb and a URL co-occur, so benign documentation links do not.
Privacy policy: https://caliper.fit/privacyRecommendationDo not direct the model to fetch and act on external URLs; treat linked content as untrusted.
tool: format_batch
One tool both accesses the filesystem and reaches the network. Combining two capability classes in a single tool widens its blast radius and is the substrate for confused-deputy and exfiltration abuse.
ysis — does not modify, convert, or repair files. Payment is required via x402 (USDC on BasRecommendationSeparate filesystem and network capabilities into distinct, independently-scoped tools.
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Agentic rails for complex workflows with receipts, fees, and MCP tool access.
Structural TC39 spec lookup for ECMA-262 and ECMA-402 in AI agents, SHA-pinned and offline-first.
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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, poin
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 metric
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
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 po
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,
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 tim
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)
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 analysi