Regex Lab MCP server

by ryudi84·io.github.ryudi84/regex-lab·v1.0.4·1 stars

MCP server for regex testing, matching, replacing, and validation

B75/100grade B

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Safety scan

B75/100

Adoption

New

1 stars

Reviews

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If you have run it, two minutes of your experience saves the next person an afternoon.

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

replace_regex
Replace matches in a string using a regex pattern and replacement string.
test_regex
Test a regex pattern against a string. Returns all matches with positions and capture groups.
validate_regex
Check if a regex pattern is syntactically valid.

scanner v0.1.10 · 2026-09-28 · same rubric, same numbers if you re-run it

no findings

Code scan3 source files scanned25/25
–Live reliabilityno gateway calls yet and no remote to proben/a
–Tool poisoningtools not inspected (local package is not executed); not countedn/a
Auth qualitylocal package, no credentials required12/15
Maintenancelast push 214 days ago4/15
Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Overall 75/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 75/100; higher than 45% of 48,255 servers
Tools: 3; the typical server has 7
Tools that change things: 0%; typical: 0%. Fewer write tools means less an agent can break
GitHub stars: 1; more than 65% of 28,688 servers

What its tools let an agent do: 2 read · 1 change

Runs npx -y regex-lab-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add regex-lab -- npx -y regex-lab-mcp

Is Regex Lab MCP server safe?: Mostly: it is graded B (75/100). Read the Regex Lab safety report
How do I install Regex Lab?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Regex Lab need an API key?: Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Regex Lab maintained?: The last commit was 251 days ago (2026-02-25). The latest release is v1.0.4.
How does Regex Lab compare with other MCP servers?: safety score 75/100 (higher than 45% of 48,255 servers); tools 3 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.