Best Http AI Skills & MCP Servers

MCP server with 45 developer utilities (16 free + 29 pro). Free: UUID, hash, HMAC, base64, timestamps, JWT decode, random strings, URL encode/decode, JSON format, YAML/JSON convert, regex test, cron explain, color convert, HTTP status, slugify, HTML escap

HAL (HTTP API Layer) - An MCP server that provides HTTP API capabilities to Large Language Models with OpenAPI/Swagger integration

MCP server for Chamade — voice gateway for AI agents. v3 is a thin stdio shim around the hosted HTTP MCP at mcp.chamade.io, so every MCP client (stdio and HTTP) talks to the same hosted surface. Supports Claude Code channel mode for push events.

Search and audit CVEs by keyword, severity, CWE, CISA KEV status, and CPE via the NIST National Vulnerability Database. STDIO or Streamable HTTP.

Look up countries, timezones, periodic table elements, physical constants, units, HTTP status codes, and MIME types via MCP. STDIO or Streamable HTTP.

Discovery wedge for the Tracklution MCP server at https://mcp.tracklution.com/mcp. Today this is an alias of the `tracklution` package and prints the agent install protocol. Future versions will offer a local stdio<->Streamable-HTTP MCP proxy for clients

Search and retrieve bioRxiv and medRxiv preprints — by DOI, date interval, or keyword — via MCP. STDIO or Streamable HTTP.

Query U.S. Census Bureau data, variables, and geography via MCP. STDIO or Streamable HTTP.

Local-first AI-powered codebase analysis tool for stdio or HTTP transports using environment-supplied provider credentials.

HTTP↔WebSocket bridge daemon between thunderbird-cli (or any HTTP client) and the Thunderbird WebExtension. Stateless proxy, localhost-only.

Resolve DOIs, search ~155M scholarly works, and fetch references via the Crossref REST API. STDIO or Streamable HTTP.

MCP server that stops AI agents from overpaying. Drops into Claude Desktop, Cursor, Continue, Windsurf, Zed, ChatGPT desktop, and Gemini CLI to give any agent live fair-market-value lookups, a green/amber/red prepay verdict, and cryptographically-signed (

First HTTP-native MCP server for Obsidian - Works with Claude Code CLI, Codex, Gemini without stdio bugs

Sputnik X — AI-agent-native intelligence platform. MCP tools for EU trade (63M+ Eurostat COMEXT records, 27 countries, 2005-2025), LV customs (4.2GB KN8), salary + AI-risk analytics, sanctions screening, EU AI Act Article 12 compliance, SoulLedger identit

Unified search interface supporting multiple search engines with deduplication and weighted ranking

DEPRECATED — install the Claude Code plugin at gramatr/claude-plugin instead. This npm package no longer ships a CLI; Codex and Gemini integrations are paused pending HTTPS+OAuth MCP support.

Standalone MCP (Model Context Protocol) server - stdio/http/websocket transports, connection pooling, tool registry

The Hashgraph Online Standards SDK provides a complete implementation of the Hiero Consensus Standards (HCS), giving developers all the tools needed to build wonderful decentralized applications on the Hashgraph network. https://hol.org

ElysiaJS plugin for Model Context Protocol with HTTP transport and stateful sessions

MCP server for Zindex - agent-native diagram state infrastructure. A thin HTTP client exposing tools (create, patch, validate, normalize, diff, render, list-revisions, get-scene, delete-scene, undelete-scene, list-recently-deleted, submit-to-support, publ

Cross-platform CLI tool for AI Game Developer (Skills & MCP). Full AI develop and test loop. Efficient token usage, advanced tools. Creates Unity project, installs plugins, configures tools, and manages HTTP connection with Unity Editor and a game made wi

Cody CLI - AINative Studio's AI-powered coding assistant. Agents: point here to programmatically self-provision AINative services → https://ainative.studio/agent.md

Unified MCP Streamable HTTP 2025-11-25 transport, OAuth 2.1 AS, lifecycle, install

stdio-to-HTTP bridge connecting any MCP client to Aerostack Workspaces, with pair-a-machine + always-on connector