Best Protocol AI Skills & MCP Servers

L402 Lightning paywall + Depth-of-Identity score gate for MCP. Two integration shapes: (a) stdio MCP server exposing l402_gate_challenge / l402_gate_verify / l402_gate_score for agent clients; (b) drop-in Express middleware + MCP tool factory that combine

Bhived MCP Server — shared knowledge graph for AI agents. Query, write, and inspect collective AI knowledge through the Model Context Protocol.

MCP server for 402 Index — search 15,000+ paid API endpoints across L402, x402, and MPP protocols with real-time health monitoring

MCP Server for Brazilian Central Bank Time Series (SGS/BCB) - Economic and Financial Data

MCP server for the UK Companies House API — connects Claude, Cursor, Zed, and other AI tools to live company data

Unified MCP server for email access across Gmail, Outlook, iCloud, and IMAP — search, send, organize, and batch-manage emails from any AI assistant

Model Context Protocol server for Gradus Notation API. Lets AI agents render music notation, validate input, and search music-theory knowledge — sponsored by Gradus School of Music Composition.

MCP server for Rust/Cargo — structured build, test, clippy, and dependency data for AI agents

The AI-Native Visual Headless CMS integration for Astro. Connect layouts with WebSocket tunnels and local MCP servers.

MCP server for IBM Code Engine and Docker/Podman integration

Persistent Project Context for Cursor, IDEs and VS Code. IANA-registered .faf format, 25 MCP tools, 309 tests.

Turn a Lanhu design into context for AI to generate code and recreate pages

Convert Playwright scripts into Tap v2 plans. Compile .spec.ts / .test.ts files into deterministic v2 Plan JSON that runs at zero LLM tokens in Claude Code, Cursor, and any MCP host.

Zero-setup grounded web research MCP server and Pi extension for AI coding agents.

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.

MCP server for React Native spatial integrity and layout audit. Provides Ground Truth for your component tree by detecting margin pollution, token deviations, bridge crossings, and render traps. 15 tools for structural analysis, layout auditing, performan

MCP server for database migration risk analysis — Flyway and Liquibase XML/YAML/SQL support with lock detection and conflict analysis

CLI and MCP server for noticed — search your developer network, trace connections, find the shortest path to anyone through GitHub and LinkedIn.

Search ReliefWeb humanitarian reports, disasters, jobs, training, and country profiles via MCP. STDIO or Streamable HTTP.

A production-grade MCP server for IBM i

PostgreSQL MCP server with connection pooling, tool filtering, and full extension support

MCP server for code search — structured ripgrep, fd, jq, and yq results for AI agents

MCP server for Milkbasket — AI-powered grocery shopping for India. Authenticate via OTP, search products, manage cart, and check wallet from Cursor, Claude, or any MCP client.

Bounded conventions map and local-pattern discovery for AI coding agents. Local-first MCP server with AST-backed hybrid search.