General Tools

ontology.guru

Provides general-purpose tools through the Model Context Protocol.

1 endpoint5 known toolsFirst detected September 14, 2026Last detected September 14, 2026

ENDPOINT 1

https://ontology.guru/mcp

No auth detected

MCP server metadata

Name: ontology-guru
Version: 1.0.0

Capabilities

tools

Server instructions

A catalogue of 120 published ontologies. Its point is that it separates what was checked from what was not, so preserve that when you report from it: an entry whose hierarchy is "withheld" has an unpublished hierarchy, never an empty one, and a licence whose "verified" is false was never checked against the licence text. Class hierarchies are pruned, readable subsets, not complete ontologies. Start with search_ontologies.

Known tools 5

search_ontologies

Search 120 published ontologies by keyword, domain, licence, or whether their class hierarchy was verified against the published source file.

Inferred read-only

get_ontology

Full record for one ontology by id, including its class hierarchy when that hierarchy was extracted from the published source file.

Inferred read-only

check_licence

The operative licence terms for one ontology: whether you may redistribute it, whether attribution is required and with exactly what notice, and whether share-alike propagates to anything you derive from it.

Inferred read-only

list_verified

Every id whose class hierarchy was extracted from the ontology's own published file.

Inferred read-only

recommend_ontologies

Describe what you are modelling in prose and get suggested ontologies — often a combination — with a reason for each.

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.ontology-guru]
url = "https://ontology.guru/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "ontology-guru": {
      "type": "http",
      "url": "https://ontology.guru/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: ontology-guru
Remote MCP URL: https://ontology.guru/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "ontology-guru": {
      "url": "https://ontology.guru/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "ontology-guru": {
      "type": "http",
      "url": "https://ontology.guru/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "ontology-guru",
  "transport": "streamable-http",
  "url": "https://ontology.guru/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Loading Trust v2 evidence…

Checking the associated registrable domain. The BuiltWith key remains server-side.

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.