Best Oss AI Skills & MCP Servers

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

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

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

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

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

Text search and replace across files — regex search, multi-file replace, grouped results.

Cross-agent permission policy specification for AI coding agents

Product search API for AI agents via Model Context Protocol. Search & compare 11M+ products across Singapore, SEA, and US markets. Multi-currency pricing, inventory, and deal discovery — built for AI agent commerce, not store management. - Win the "Build

TasteDive MCP — cross-media recommendations (free with key)

Browser-based IDE + AI agent orchestration CLI. Run Claude Code in parallel across git worktrees, auto-approve safe tools with the Security Bouncer, and control long-running AI work from any device at app.mstro.app.

MCP server for agent-to-agent communication — capability discovery, task delegation, and result aggregation across MCP agents

FreeRide — Project knowledge for AI agent workflows. MCP server that gives AI coding agents persistent memory across sessions.

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

Local MCP server for Google Workspace (Gmail, Drive, Calendar, Sheets, Docs, Contacts, Tasks, Meet, Search Console, +Forms/Chat/Admin) across multiple accounts — OAuth-only, encrypted token storage, deny-by-default writes.

MCP server for InsumerAPI — condition-based access infrastructure. Send a wallet and conditions, get a signed boolean across 37 chains. 27 tools: attestation, wallet trust profiles (49 checks across 27 chains incl. Solana, XRPL, Bitcoin, Tron, Stellar, Su

Cross-agent permission policy specification for AI coding agents

Universal AI CLI extension manager - install MCP servers, plugins and skills across Claude Code, Gemini CLI and Codex in one command

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

Unified Capability index for AI agents — 80+ ranked cloud services, skills, MCP servers, plugins, parsers, and public-data sources for Claude Code, Cursor, Claude Desktop, OpenClaw. Call find_capability with a query or jtbd tag to get a ranked list across

Lossless, project-scoped memory for AI coding tools. Durable context across sessions with 56 MCP tools, FTS5 search, conductor orchestrator, loop/watch monitoring, snapshot capture, pre-flight overlap checks, Claude/Codex/OpenCode wrappers, Linear sync, a

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

Query WHO Global Health Observatory data — 3,059 indicators across 194 member states with country, region, year, and sex filters via MCP. STDIO or Streamable HTTP.

🧴 Sync your AI agent configurations and rules across platforms with ease