"RAG MCP servers with quality validation" matching MCP servers:

Provides real-time air quality data (US AQI, PM2.5, PM10, ozone, NO2, SO2, CO) for any city via natural language, using free Open-Meteo data and a single tool.

Enables real-time China nationwide air quality monitoring via CNEMC, with AQI, pollutant concentrations and levels, quality ratings, city rankings, and station-level details.

MCP server for querying Seoul's official air quality data, including real-time and hourly measurements by district. Enables AI assistants to answer questions about fine dust and air pollution using public data from Seoul Open Data Plaza.

Enables discovering and independently validating scholarly metadata from extracted research text using Crossref, OpenAlex, DataCite, and optional read-only Zotero checks, returning ranked and verified reference candidates.

Enables real-time air quality comparison between two cities through natural language, with an interactive dashboard widget for pollutant analysis.

Provides access to EPA's Air Quality System API with 31 tools for querying air quality data, monitoring sites, and pollution measurements across the United States through natural language.

Enables querying Japanese public holidays and calculating business days, including holiday checks, holiday lists, and business-day arithmetic.

A Model Context Protocol server that provides weather information using the Open-Meteo API, allowing users to get current weather for specific cities and retrieve weather data for date ranges.

Integrates Eurostat quality-of-life metrics and real-time job searching to help users find international internships in high-ranking European cities. It enables ranking cities based on personalized criteria like safety or transport and retrieves structured internship listings via the Tavily API.

An MCP Server that enables interaction with the British Columbia Data Catalogue API, allowing users to access and manage data catalogue resources through natural language commands.

Provides access to 250,000+ Canadian government datasets and specialized querying of transportation infrastructure including bridges, airports, cycling networks, transit systems, railways, and tunnels across multiple provinces.

Enables network information lookup through WHOIS and RIPE Database queries. Supports domain/IP/ASN lookups, AS-SET expansion, route validation, and contact information retrieval across multiple Regional Internet Registries.

Provides verified UK company lookup and number validation for AI agents using official Companies House data. Enables lookup of registered details by number, validation of company number format, and search by company name.

Enables LLM agents to access the Czech public business register (ARES) for company lookups by IČO, name searches, VAT registration checks, and offline IČO validation.

Connects MCP-compatible AI clients to BMLT root servers, enabling natural language queries for NA meeting data including search by location, day, format, and more.

Enables MCP-compatible agents to answer open questions about NHS provider performance using live waiting-time data from RTT and My Planned Care, supplemented by CQC quality ratings.

MCP server providing SEC EDGAR signal intelligence — insider trading (Form 4), 13F holdings, filing velocity, activist risk flags, and multi-company comparisons. Already on the official MCP Registry, awesome-mcp-servers (PR #5664 pending), and Apify Store with three-tier pay-per-event pricing. MIT license, TypeScript, comprehensive README.

Enables querying WikiTree genealogy data including profiles, ancestors, descendants, relatives, biography, photos, and categories via natural language.

An MCP server providing real-time access to Philippine government data including earthquakes, weather, typhoons, procurement, population, and air quality. It enables AI agents to query multiple official Philippine data sources through a unified interface for research and analysis purposes.

Provides AI agents access to OpenStreetMap's comprehensive tagging knowledge base, enabling tag queries, preset discovery, and validation of OSM tags for mapping applications.