Johnnywang2001

Check SSL/TLS certificate expiry, issuer, protocol, and SANs for one or more domains. Use when asked to check SSL certificates, monitor cert expiry, verify H...

Analyze log files to detect error patterns, aggregate by severity, group repeated errors by fingerprint, and flag anomaly time windows. Use when asked to ana...

Audit HTTP security headers for any website. Use when a user asks to check security headers, harden a web server, audit HSTS/CSP/X-Frame-Options compliance,...

Explain, generate, validate, and preview crontab expressions. Use when a user needs to understand what a cron expression means, create a new cron schedule, c...

Validate .env files for common issues — detect leaked secrets (AWS keys, GitHub tokens, Stripe keys, JWTs), find duplicate variables, flag empty values, comp...

Enumerate subdomains for any domain using DNS brute-force and certificate transparency logs (crt.sh). Use when a user needs to discover subdomains, perform r...

Generate, parse, validate, and convert UUIDs (v1/v3/v4/v5), ULIDs, and NanoIDs. Use when creating unique identifiers, parsing existing UUIDs to extract versi...

Lightweight URL uptime checker and response time monitor. Check if websites and APIs are up, measure response times, track history, and detect SSL issues. Us...

Compute, verify, and compare file hashes using MD5, SHA-1, SHA-256, SHA-512, and more. Use when checking file integrity, verifying downloads against expected...

Generate professional PDF invoices from natural language or structured data. Use when the user asks to create an invoice, bill a client, generate a receipt,...

Decode, inspect, and validate JWT (JSON Web Token) tokens from the command line. Shows header, payload, algorithm, expiry status, and known claim labels. Use...

Generate .htaccess files for Apache web servers. Use when creating redirect rules, URL rewrites, security headers, HTTPS enforcement, IP blocking, caching ru...

Scan websites, markdown files, and HTML files for broken links (dead links). Use when checking a website for 404s, validating links in documentation or READM...

Generate .gitignore files for any project type using GitHub's 200+ official templates. Use when creating new projects, setting up repositories, needing to co...

Convert times between timezones, show world clocks, find meeting overlap across zones, and look up UTC offsets and DST status. Use when converting between ti...

Multi-format encoder, decoder, and hasher supporting Base64, Base64URL, Base32, Hex, URL-encoding, HTML entities, ROT13, Binary, and ASCII85. Also computes M...

Generate changelogs from git commit history with conventional commit parsing. Use when asked to generate a changelog, create release notes, summarize git his...

Test and debug CORS (Cross-Origin Resource Sharing) configurations on live URLs. Use when checking if a server returns correct CORS headers, debugging CORS e...