Best Oss AI Skills & MCP Servers

Agent-native CLI for AI mobile testing and app automation across iOS, Android, tvOS, Android TV, macOS, and Linux.

Cross-agent permission policy specification for AI coding agents

Planu — MCP Server for Spec Driven Development with native Rust acceleration for hot paths. Cross-platform (Linux/macOS/Windows, x64/arm64, glibc/musl).

MCP server for Section 8 Fair Market Rent (FMR) lookups — ZIP code search, state/county browsing, historical trends, and HUD glossary

Open-source MCP server to publish to Dev.to, Ghost, Hashnode, WordPress, Medium, Substack, LinkedIn, X, Bluesky, and Mastodon from Claude Code. Local stdio, no cloud relay. Includes SEO scoring, JSON-LD schema, canonical-URL wiring, social-post generation

MCP server providing persistent cross-session memory for AI agents — store, recall, search, and summarize memories across agent boundaries

Axon MCP server — local non-custodial trading terminal for AI agents. ~35 typed Model Context Protocol tools for Hyperliquid perps, Uniswap V3 spot, Aave V3 lending, GMX v2 perps across Arbitrum, Base, Avalanche, Polygon, Optimism. Drop-in for Claude Code

Planu — MCP Server for Spec Driven Development with native Rust acceleration for hot paths. Cross-platform (Linux/macOS/Windows, x64/arm64, glibc/musl).

MCP server for per-agent cost attribution, budget management, and spend analytics across AI agent fleets

Codify how you work. Every AI tool obeys. Markdown rules + cross-tool companion files (AGENTS.md/CLAUDE.md/.cursor/rules/.gemini) + Compliance Receipts for protocol-level enforcement of destructive ops. Reference implementation of CRP 1.0. Works on every

Planu — MCP Server for Spec Driven Development with native Rust acceleration for hot paths. Cross-platform (Linux/macOS/Windows, x64/arm64, glibc/musl).

Planu — MCP Server for Spec Driven Development with native Rust acceleration for hot paths. Cross-platform (Linux/macOS/Windows, x64/arm64, glibc/musl).

The MCP toolkit for AI agents. Voice MCP gives your AI a phone line through your own Twilio. Coder MCP gives it a memory across every Claude Code, Codex CLI, and Cursor session. One npm package, two capability modules, local SQLite, no SaaS in the middle.

MCP server that automatically summarizes and shares context across parallel Claude Code sessions

ASG Agent Pay — the banking layer for autonomous AI agents. Multi-chain payments (x402 + MPP), virtual cards, policy engine, and wallet abstraction across 17 networks. The only SDK unifying Coinbase x402 and Stripe MPP protocols.

Search the PubChem chemical database for compounds, properties, safety data, bioactivity, cross-references, and entity summaries via MCP. STDIO or Streamable HTTP.

Agentic HubSpot CLI + MCP server. Covers ~all documented public endpoints (1180 across 55+ command domains). Reachability is tier/scope/auth-model gated — UI-only surfaces and deprecated APIs excluded. Enterprise safety rails, self-hosted.

A collaborative BrAPI v2.1 workspace for multi-agent research via MCP. Search studies, germplasm, genotypes, & more - across Breedbase, T3, Sweetpotatobase, & any BrAPI v2-compliant server.

Yaw MCP -- MCP servers, managed. Run locally, sync across machines with Pro.

Query 29,500+ World Bank development indicators for 200+ countries across 60+ years via MCP. STDIO or Streamable HTTP.

Swiss open data MCP server — 68 tools across 20 modules. Zero API keys.

CodeSlick CLI tool for pre-commit security scanning — 308 checks across JS, TS, Python, Java, Go

Prism Coder — Cognitive memory + tool-calling intelligence for AI agents. Mind Palace persistent memory (BFCL Gold Certified, 100% Tool-Call Accuracy, 54 Agent Skills, Zero-Search HDC/HRR retrieval, HRR Semantic Drift Detection across BCBA/Coding/AAC doma

Extension manager for AI coding agents — install skills, subagents, slash commands, and MCP servers across Claude Code, Codex, Cursor, Copilot, and more.