GuardRails MCP Server
by tam-dsio.github.TAM-DS/guardrails-mcpv0.1.1
Local prompt regression tracker with six fictional cases and evidence for human review.
context tax
pending
security
pending
cold start
pending
freshness
pending
Our reading of GuardRails, from the data
GuardRails is an MCP server from tam-ds, listed in the official MCP Registry.
We haven't measured its tool list yet, so its token cost is unknown.
It runs locally on your machine over stdio.
Install GuardRails MCP server
Install in Claude Code
claude mcp add guardrails-tam-ds -e GUARDRAILS_DATA_DIR='<guardrails-data-dir>' -- uvx guardrails-mcpInstall in Cursor
{
"mcpServers": {
"guardrails-tam-ds": {
"command": "uvx",
"args": [
"guardrails-mcp"
],
"env": {
"GUARDRAILS_DATA_DIR": "<guardrails-data-dir>"
}
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"guardrails-tam-ds": {
"command": "uvx",
"args": [
"guardrails-mcp"
],
"env": {
"GUARDRAILS_DATA_DIR": "<guardrails-data-dir>"
}
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"guardrails-tam-ds": {
"type": "stdio",
"command": "uvx",
"args": [
"guardrails-mcp"
],
"env": {
"GUARDRAILS_DATA_DIR": "<guardrails-data-dir>"
}
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"guardrails-tam-ds": {
"command": "uvx",
"args": [
"guardrails-mcp"
],
"env": {
"GUARDRAILS_DATA_DIR": "<guardrails-data-dir>"
}
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Configuration
| Variable | Required | Secret | Description |
|---|---|---|---|
| GUARDRAILS_DATA_DIR | yes | — | Absolute writable directory for local evaluation records. Use the same path in CLI and dashboard. |
Freshness
Not enough public signals yet to judge maintenance.
Last commit (default branch)
2026-10-16 · 2d ago · GitHub
Latest release
2026-10-16 · 2d ago · GitHub · v0.1.1
Package published
no data · npm/PyPI
Registry entry updated
2026-10-16 · 2d ago · official registry · v0.1.1
FAQ
›How do I install the GuardRails MCP server in Claude Code?
Run: claude mcp add guardrails-tam-ds -e GUARDRAILS_DATA_DIR='<guardrails-data-dir>' -- uvx guardrails-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does GuardRails require an API key?
Yes. It expects GUARDRAILS_DATA_DIR.
›Can I use GuardRails as a remote (hosted) MCP server?
No hosted endpoint is published; it runs locally over stdio.
›Is GuardRails in the official MCP registry?
Yes, as io.github.TAM-DS/guardrails-mcp.
Sources and method
- Official MCP Registry entry
- updated 2026-10-16
- GitHub repository
- fetched 2026-10-19
- Package registry (npm / PyPI)
- listed
- Last checked against all sources
- 2026-10-19
The description, packages and links come from the maintainer's own published metadata. Token cost, security signals, freshness and the reading above are MCPSkillHub's own measurements; see the methodology. Spot an error? Request a correction or claim the listing.