Model Context Protocol servers that extend AI capabilities
AiAgentKarl
Persistent memory for AI agents — store, retrieve and search knowledge across sessions
AiAgentKarl
Cybersecurity data for AI agents — CVE database, vulnerability search, threat intelligence, exploit info
Kristian Kollsgard
Reusable utility methods for MCP servers
rog0x
** Cryptography and encoding tools — hash (MD5/SHA-256/SHA-512/HMAC), encode/decode (Base64/URL/hex/HTML entities), generate UUIDs/nanoids/random strings, password generation and strength checking, JWT decode and creation.
...morerog0x
** Color tools for AI agents — convert between HEX/RGB/HSL/HSV/CMYK, generate palettes (complementary, analogous, triadic), check WCAG contrast ratio, mix/lighten/darken colors, generate CSS gradient code.
...morerog0x
** Testing and QA MCP server — generate test cases from function signatures, create realistic mock data (names, emails, UUIDs), mock API responses from schemas, analyze test coverage gaps, generate assertion code with deep comparison.
...morerog0x
** SQL and database tools — format/prettify SQL, explain queries in plain English, analyze CREATE TABLE schemas with Mermaid ER diagrams, build SQL from natural language, generate ALTER TABLE migrations from schema diffs.
...morerog0x
** npm/Node.js package tools — search npm registry, get package details, audit for outdated/deprecated/vulnerable deps, estimate bundle size via bundlephobia, compare packages side by side.
...morerog0x
** Environment and configuration MCP server — parse .env files, generate .env.example, check port availability, system info (OS, CPU, memory, versions), verify tool dependencies.
...morerog0x
** Local Git repository analysis — commit history with filtering, diff between refs, blame per file, repository statistics (commits per author/month, most changed files), branch analysis with ahead/behind counts.
...morealex-pradas
MCP server for versioned document retrieval, metadata access, and diff capabilities
Modexia <[email protected]>
Official Modexia AgentPay MCP Server
rog0x
** Config file tools — parse JSON/JSONC, YAML, TOML, INI files. Deep merge configs, validate against schemas, compare two configs showing differences.
...morerog0x
** String tools — text analyzer (word count/reading level), transformer (extract emails/URLs, mask data), string diff (char/word/line), template engine ({{variables}}, conditionals, loops), URL slug generator.
...morerog0x
** Math tools — safe expression evaluator (no eval), unit converter (length/weight/temp/data/time/speed), statistics (mean/median/stdev/correlation), number formatter (currency/scientific/hex), percentage calculator.
...morerog0x
** Image tools — read image metadata from URL, find website favicons, extract Open Graph/Twitter card images, generate placeholder image URLs, create responsive image HTML (srcset/picture).
...morerog0x
** Network diagnostics — DNS lookup (A/AAAA/MX/TXT/NS/CNAME records, reverse DNS), IP geolocation (country/city/ISP), SSL certificate checker (expiry/issuer/chain), WHOIS lookup, HTTP ping with latency statistics.
...morerog0x
** Date/time tools — convert between timezones, calculate date differences (business days), parse cron expressions, convert Unix timestamps, format durations.
...moreVoxel51, Inc.
MCP server exposing FiftyOne dataset analysis tools
Jens Rehpöhler
MCP Charts & Visualization Server
Robert Matsuoka <[email protected]>
CLI-first semantic code search with MCP integration and interactive D3.js visualization for exploring code relationships
Ales Kutek <[email protected]>
MCP server for Confluence with local filesystem caching. Sync spaces locally, edit HTML files, and push changes back. Features: tree-based storage, incremental sync, version conflict detection, auto full-sync every 3 days.
...moreThe Cloud Clock Work
Hook system and MCP tool server for Claude Code agents
MCP server for academic paper search, curation, and multi-platform push