Regex test, explain, replace patterns for AI agents
Valid MCP server (7 strong, 8 medium validity signals). 3 known CVEs in dependencies (0 critical, 3 high severity) Package registry verified. Imported from the Official MCP Registry.
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Add this to your MCP configuration file:
{
"mcpServers": {
"io-github-rog0x-regex": {
"args": [
"-y",
"@rog0x/mcp-regex-tools"
],
"command": "npx"
}
}
}From the project's GitHub README.
Regex and text processing tools for AI agents via the Model Context Protocol (MCP).
| Tool | Description |
|---|---|
regex_test | Test a regex pattern against text. Returns all matches with indices, captured groups, and named groups. |
regex_replace | Find and replace using regex with support for capture group references ($1, $2, $&, $<name>). |
regex_extract | Extract all matches of a pattern from text as a structured array. Optionally return only a specific capture group. |
regex_explain | Parse a regex pattern and return a human-readable explanation of each component and flag. |
text_transform | Apply common text transformations: camelCase, snake_case, kebab-case, PascalCase, UPPER, lower, title case, reverse, trim, deduplicate lines, sort lines, remove blank lines, count words/chars/lines. Chain multiple transforms in one call. |
npm install
npm run build
Add this to your Claude Desktop config file:
%APPDATA%\Claude\claude_desktop_config.json~/Library/Application Support/Claude/claude_desktop_config.json{
"mcpServers": {
"regex-tools": {
"command": "node",
"args": ["D:/products/mcp-servers/mcp-regex-tools/dist/index.js"]
}
}
}
claude mcp add regex-tools node D:/products/mcp-servers/mcp-regex-tools/dist/index.js
Or add to your .mcp.json:
{
"mcpServers": {
"regex-tools": {
"command": "node",
"args": ["D:/products/mcp-servers/mcp-regex-tools/dist/index.js"]
}
}
}
regex_test({ pattern: "(\\d{4})-(\\d{2})-(\\d{2})", text: "Today is 2026-03-19 and tomorrow is 2026-03-20" })
regex_replace({ pattern: "(\\w+)\\s(\\w+)", replacement: "$2 $1", text: "hello world" })
regex_extract({ pattern: "[\\w.]+@[\\w.]+", text: "Contact us at info@example.com or support@example.com" })
regex_explain({ pattern: "^(?:https?://)?(?:www\\.)?([\\w-]+)\\.\\w{2,}$", flags: "i" })
text_transform({ text: "hello world example", transforms: ["PascalCase"] })
text_transform({ text: "some text\nwith\nlines\nwith\nduplicates\nlines", transforms: ["deduplicate_lines", "sort_lines"] })
MIT
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