wardcat-mcp
MCP server providing on-prem PII detection and anonymization tools (scan and is_sensitive) for AI agents, ensuring data stays local.
README
wardcat-mcp
An MCP server that exposes wardcat's on-prem PII detection and anonymization as tools any agent can call — Claude Desktop, Cursor, a self-hosted bot, a RAG pipeline. Use it as a guardrail: sanitize inputs before they reach an LLM, or gate them with a semantic "is this sensitive?" check.
Runs locally, stays local. The server runs on your machine over stdio; the text, the models, and all detection stay on-prem — nothing is sent anywhere. Publishing this package ships code you run yourself, not a hosted service.
Tools
| Tool | Description |
|---|---|
scan(text) |
Detect PII and return the sanitized text plus a PII-free summary (entity types, actions, confidence — never the raw values). |
is_sensitive(text) |
Holistic LLM yes/no on whether the text contains sensitive information. Requires the LLM layer (WARDCAT_LLM_MODEL). |
Install & run
Not on PyPI yet — run from source (wardcat itself is source-only for now):
uvx --from git+https://github.com/oguzhantopcu0/wardcat-mcp.git wardcat-mcp
# or, cloned locally:
uv run wardcat-mcp
Add it to an MCP client
Claude Desktop (claude_desktop_config.json), Cursor, Cline, Zed, etc.:
{
"mcpServers": {
"wardcat": {
"command": "uvx",
"args": ["--from", "git+https://github.com/oguzhantopcu0/wardcat-mcp.git", "wardcat-mcp"],
"env": {
"WARDCAT_SALT": "your-secret-salt",
"WARDCAT_ACTION": "redact",
"WARDCAT_LLM_MODEL": "llama3.2:3b"
}
}
}
}
Configuration (environment variables)
| Var | Default | Meaning |
|---|---|---|
WARDCAT_SALT |
"" |
Hashing salt (required for the hash action). |
WARDCAT_ENTITIES |
broad structural + name set | Comma-separated entity types to enable. |
WARDCAT_ACTION |
redact |
warn | hash | redact | mask. |
WARDCAT_SPACY_MODEL |
— | Enable SpaCy NER with this model (needs the ner extra). |
WARDCAT_LLM_MODEL |
— | Enable the on-prem LLM layer via Ollama (e.g. llama3.2:3b). |
WARDCAT_LLM_BASE_URL |
http://localhost:11434 |
Ollama endpoint. |
Disclaimer
wardcat is a best-effort PII detector — it does not catch everything and is not legal advice or a substitute for compliance review (e.g. GDPR/KVKK). Validate it against your own data. Provided "as is" (MIT).
License
MIT — see LICENSE.
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