Ontomics MCP Server - install, status & alternatives [2026]

01 · Install Ontomics

before you install - you'll need

The README does not document required environment variables for a basic install.

Claude Code

claude mcp add etiennechollet-ontomics -- npx -y @ontomics/ontomics

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "etiennechollet-ontomics": {
      "command": "npx",
      "args": [
        "-y",
        "@ontomics/ontomics"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package @ontomics/ontomics - the @ontomics scope differs from the repo owner (etiennechollet); confirm it's the project's official package

registry namespace io.github.EtienneChollet is GitHub-verified and matches the repo owner

03 · What Ontomics can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can find all variants, related concepts, and occurrences of a term, find the key signatures, classes, and files for a concept, get the signature, docstring, and relationships for a function or class, and list the top domain concepts by frequency.

Capability map

Tools grouped from the project's README - what Ontomics lets an agent do.

read & search

7 tools - e.g. Get the signature, docstring, and relationships for a function or class; List the top domain concepts by frequency; List all detected naming patterns (prefixes, suffixes, conversions)

describe_symbol · list_concepts · list_conventions · list_entities · find_similar_logic · describe_logic…

Concept

4 tools - e.g. Find all variants, related concepts, and occurrences of a term; Find the key signatures, classes, and files for a concept; Trace how a concept flows through the codebase via call chains

query_concept · locate_concept · trace_concept · concept_map

Check

1 tool - e.g. Check an identifier against project conventions; suggests the canonical form

check_naming

Suggest

1 tool - e.g. Generate an identifier name that fits the project's vocabulary

suggest_name

Vocabulary

1 tool - e.g. Measure convention coverage, naming consistency, and cluster cohesion

vocabulary_health

Ontology

1 tool - e.g. Show new, changed, or removed domain concepts since a git ref

ontology_diff

Export

1 tool - e.g. Export domain knowledge as portable YAML for use in other repos

export_domain_pack

Compact

1 tool - e.g. Assemble tiered context (concepts + logic) for a symbol, optimized for LLM consumption

compact_context

Latest releases

v0.3.1 · 2026-04-14

Install ontomics 0.3.1 · Install prebuilt binaries via shell script · sh · curl --proto '=https' --tlsv1.2 -LsSf | sh · Install prebuilt binaries via Homebrew · sh · brew install EtienneChollet/tap/ontomics · Install…

v0.3.0 · 2026-04-06

Install ontomics 0.3.0 · Install prebuilt binaries via shell script · sh · curl --proto '=https' --tlsv1.2 -LsSf | sh · Install prebuilt binaries via Homebrew · sh · brew install EtienneChollet/tap/ontomics · Install…

v0.2.9 · 2026-04-04

Install ontomics 0.2.9 · Install prebuilt binaries via shell script · sh · curl --proto '=https' --tlsv1.2 -LsSf | sh · Install prebuilt binaries via Homebrew · sh · brew install EtienneChollet/tap/ontomics · Install…

04 · Who maintains Ontomics

ontomics is maintained by etiennechollet. It's the only MCP server we track from this author; the repo dates to Mar 2026.

05 · Facts

repository: github.com/etiennechollet/ontomics
website: https://github.com/EtienneChollet/ontomics
category: coding agent - ranked #108 of 194 actively-maintained coding agent servers as of 2026-08-25.
registry: io.github.EtienneChollet/ontomics (active, first published 2026-04-03 · 9 versions)
packages: npm:@ontomics/ontomics

06 · Ontomics FAQ

Is Ontomics still maintained?

Yes - as of 2026-08-25, its last commit was 2026-04-17. We re-verify nightly.

What can Ontomics do?

With this server connected, an agent can find all variants, related concepts, and occurrences of a term, find the key signatures, classes, and files for a concept, get the signature, docstring, and relationships for a function or class, and list the top domain concepts by frequency.

How do I install Ontomics?

Run `npx -y @ontomics/ontomics`. The README does not document required environment variables for a basic install. You can also paste the ready-made client config above.

Does Ontomics run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Ontomics

Alternatives to Ontomics

Maintained coding agent servers if Ontomics isn't the fit.

Pairs well with

Servers that cover what Ontomics doesn't - only shown when the pairing reason fits the companion.

More coding agent MCP servers · Figma To Code MCP · Glass · Dep Scope · Agent Audit · Google Jules MCP Server

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