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Best API AI Skills & MCP Servers

648 curated API skills and MCP servers — install any of them into Claude, Cursor, ChatGPT, n8n, or any AI stack with one command.

Delx

MCP Registry

Native MCP stdio bridge for Delx Protocol: continuity, witness, recovery, agent passport, and 100+ tools from https://api.delx.ai/v1/mcp.

MCP Registry · ★ 5.0free

Tinyfish

MCP Registry

基于 TinyFish 免费搜索 API 的 MCP(Model Context Protocol)服务,提供网络搜索与网页内容抓取能力。支持 Stdio 和 HTTP 两种传输方式接入 Claude Desktop、Cursor、Windsurf 等 AI 客户端。

MCP Registry · ★ 5.0free

Korean Dart

MCP Registry

OpenDART 83개 API → 15개 MCP 도구. 금융감독원 전자공시(DART)를 AI로 검색·조회·분석

MCP Registry · ★ 5.0free

Clirank

MCP Registry

MCP server for API discovery and recommendations: help Claude Code, Codex, Cursor, Cline, and other coding agents choose APIs with current CLIRank data instead of stale model memory

MCP Registry · ★ 5.0free

Markfetch

MCP Registry

MCP server: fetch a URL, return clean markdown. Built for AI agents.

MCP Registry · ★ 5.0free

X Developer

MCP Registry

X (Twitter) data platform skill for AI coding agents. 100+ REST API endpoints, 2 MCP tools, 23 extraction types, HMAC webhooks.

MCP Registry · ★ 5.0free

Nuxt Migration

MCP Registry

MCP Server for AI-assisted Nuxt 2/3 to Nuxt 3/4 migration — audits Options API, Vuex, asyncData, ESM compatibility, and generates Pinia/Composable code

MCP Registry · ★ 5.0free

Refacil Pay

MCP Registry

MCP Server para la API refacil-pay

MCP Registry · ★ 5.0free

Mailchimp

MCP Registry

Draft, test, and send Mailchimp campaigns straight from your MCP client — with audience management, subscriber CRUD, and post-send analytics behind safe-by-default send gates. STDIO or Streamable HTTP.

MCP Registry · ★ 5.0free

Brain

MCP Registry

Adaptive error memory and code intelligence system with Hebbian synapse network, hybrid search, and REST API

MCP Registry · ★ 5.0free

Server

MCP Registry

MCP server for Glean API integration

MCP Registry · ★ 5.0free

Twitterapi Io

MCP Registry

TwitterAPI.io MCP server providing offline access to docs (endpoints, pages, blogs) for Claude and other AI assistants

MCP Registry · ★ 5.0free

Companies House Cli

MCP Registry

CLI tool for the UK Companies House API — company search, profiles, officers, filings, ownership, and due diligence

MCP Registry · ★ 5.0free

Opencode Gitlab Plugin

MCP Registry

GitLab tools plugin for OpenCode - provides GitLab API access for merge requests, issues, pipelines, and more

MCP Registry · ★ 5.0free

Xlsx For Ai

MCP Registry

The MCP server that makes LLMs reliable on real-world Excel spreadsheets. Thin npm client over a hosted API — read, write, diff, redact, and supervise .xlsx files from any MCP-aware agent.

MCP Registry · ★ 5.0free

Stockquotes

MCP Registry

MCP Server for fetching stock quotes from Yahoo Finance

MCP Registry · ★ 5.0free

Cctx Optimizer

MCP Registry

Reduce Claude Code token usage by 70-90% with cross-session memory and four-layer optimization: semantic codebase indexing, PostToolUse tool compression, turn summarization, and session consolidation. MCP server powered by Ollama — zero API calls, runs en

MCP Registry · ★ 5.0free

Freshcontext

MCP Registry

Real-time web intelligence for AI agents. 21 tools, no required API keys. Every result timestamped with a freshness score.

MCP Registry · ★ 5.0free

Mcpollinations

MCP Registry

Model Context Protocol (MCP) server for the Pollinations APIs with image saving functionality.

MCP Registry · ★ 5.0free

Mcp

MCP Registry

Stdio MCP server that wraps the ImageTalk backend REST API for use with Claude Desktop and other MCP clients.

MCP Registry · ★ 5.0free

Ignis Docs

MCP Registry

Interactive documentation site and MCP (Model Context Protocol) server for the Ignis Framework. Includes a VitePress-powered documentation site with guides, API references, and best practices. Ships an MCP server (CLI: ignis-docs-mcp) with 11 tools for AI

MCP Registry · ★ 5.0free

Api Testing

MCP Registry

The most complete MCP server for API testing. 36 tools: HTTP requests (with token-optimized responses), assertions, request flows, OpenAPI import, mock data, load testing, collections, environments, native export/import, Postman import/export, cURL export

MCP Registry · ★ 5.0free

Wildberries Api

MCP Registry

MCP server for Wildberries Seller API

MCP Registry · ★ 5.0free

Clinicaltrialsgov

MCP Registry

MCP server for the ClinicalTrials.gov v2 API. Search trials, retrieve study details and results, and match patients to eligible trials.

MCP Registry · ★ 5.0free

About API skills on iClaude

iClaude is the universal install layer for AI skills. Every API skill on this page can be installed into Claude Code, Claude Desktop, Cursor, ChatGPT, n8n, Codex, and more — using a single copy-paste command. No config drift, no per-stack adapters, no manual MCP wiring.