Best Ar AI Skills & MCP Servers

Quickfill MCP Server: Hot-reloading Alpine.js environment for local file parsing.

Local-first MCP server for Claude Code cost analysis, budgets, forecasts, anomalies, and subagent-aware optimization from local JSONL session logs.

MCP server for searching and getting up-to-date information about NPM, Cargo and NuGet packages.

MCP server for Hacker News — feeds, threads, users, and search via Firebase and Algolia APIs

MCP server that exposes documentation search tools for AI assistants

Lightweight pre-commit safety gate for AI agents. Answers 'is this change safe?' with PASS/WARN/BLOCK verdict in seconds. Zero setup, no database.

MCP server for Credit Karma — natural-language access to your transactions, spending, and accounts

Node.js/TypeScript MCP server for Atlassian Jira. Equips AI systems (LLMs) with tools to list/get projects, search/get issues (using JQL/ID), and view dev info (commits, PRs). Connects AI capabilities directly into Jira project management and issue tracki

Search and replace in files — regex search, in-place replace.

Create autonomous AI agents that actually execute tasks—read emails, manage git, run commands, search the web, and orchestrate workflows through natural conversation

Slack MCP without OAuth. 21 tools (16 read/write Slack + 2 workflow profile primitives + 3 hosted-brain upgrade stubs). Free OSS or hosted (free tier no card; $9/mo Pro = unlimited; morning DM rolling out Q2 2026).

MCP server and CLI tool for interacting with the Wayback Machine without API keys

MCP Server for SearxNG Bridge

Knit — second brain for any MCP-speaking AI coding agent (Claude Code, Cursor, Codex CLI, Cline, Continue, GitHub Copilot). Per-project memory, tier-routed workflow protocol, parallel team worktrees.

An arXiv MCP server for searching and retrieving academic papers.

MCP server for UK company intelligence — search, directors, filings, financial accounts (iXBRL), website-vs-Companies-House legitimacy verification, and health scoring

On-device memory layer for AI agents. Claude Code, OpenClaw, and Hermes. Hooks + MCP server + hybrid RAG search.

Typescape MCP server for review, finding, and rules workflows in external agent harnesses

MCP Server for Arknights PRTS Wiki & game data (TypeScript / Streamable HTTP)

Code-aware browser testing agent — reads your codebase, understands functionality, tests every element, reports with screenshots. Works as MCP server for Cursor/Claude Code or standalone CLI.

MCP server and CLI tool for interacting with the Wayback Machine without API keys

MCP protocol server for NestJS with decorators, transports, guards, interceptors, and registry

Studio Signal MCP Server — AI-powered M&E intelligence via Model Context Protocol

Prompt injection + PII detection MCP server for AI agents. 22 signatures, 7 languages, ~23ms latency. Signed GDPR Art.30 audit reports.