Rexact MCP Server
by nicolasmar91io.github.Nicolasmar91/rexact-mcpv0.1.2
Verify, explain and audit regexes (ReDoS, engine compatibility) offline.
context tax
pending
security
pending
cold start
pending
freshness
pending
Our reading of Rexact, from the data
Rexact is an MCP server from nicolasmar91, 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 and needs one secret (ANTHROPIC_API_KEY); use a scoped, least-privilege key.
Install Rexact MCP server
Install in Claude Code
claude mcp add nicolasmar91 -e ANTHROPIC_API_KEY='<anthropic-api-key>' -- npx -y rexact-mcpInstall in Cursor
{
"mcpServers": {
"nicolasmar91": {
"command": "npx",
"args": [
"-y",
"rexact-mcp"
],
"env": {
"ANTHROPIC_API_KEY": "<anthropic-api-key>"
}
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"nicolasmar91": {
"command": "npx",
"args": [
"-y",
"rexact-mcp"
],
"env": {
"ANTHROPIC_API_KEY": "<anthropic-api-key>"
}
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"nicolasmar91": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"rexact-mcp"
],
"env": {
"ANTHROPIC_API_KEY": "<anthropic-api-key>"
}
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"nicolasmar91": {
"command": "npx",
"args": [
"-y",
"rexact-mcp"
],
"env": {
"ANTHROPIC_API_KEY": "<anthropic-api-key>"
}
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Configuration
| Variable | Required | Secret | Description |
|---|---|---|---|
| ANTHROPIC_API_KEY | — | yes | Optional. Only needed by the generate_regex tool; the four other tools work offline without it. |
Freshness
Not enough public signals yet to judge maintenance.
Last commit (default branch)
2026-10-15 · 3d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-15 · 3d ago · official registry · v0.1.2
FAQ
›How do I install the Rexact MCP server in Claude Code?
Run: claude mcp add nicolasmar91 -e ANTHROPIC_API_KEY='<anthropic-api-key>' -- npx -y rexact-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does Rexact require an API key?
Yes. It expects ANTHROPIC_API_KEY, of which 1 is a secret.
›Can I use Rexact as a remote (hosted) MCP server?
No hosted endpoint is published; it runs locally over stdio.
›Is Rexact in the official MCP registry?
Yes, as io.github.Nicolasmar91/rexact-mcp.
Sources and method
- Official MCP Registry entry
- updated 2026-10-15
- 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.