"Understanding Integrated Knowledge Graphs" matching MCP servers:

Enables searching Google's Knowledge Graph for real-world entities via two tools: search by query or lookup by Machine ID, returning structured data including entity types, descriptions, and URLs.

Enables reading and understanding NetCDF files, providing tools to inspect structure, variables, metadata, and data quality for scientific datasets.

Enables parallel searching of multiple scholarly sources, deduplication of results, and access to paper metadata, abstracts, open-access links, citation graphs, and SciVal metrics.

Enables searching and exploring 340 million academic papers from 15+ databases with semantic search, citation graphs, and knowledge graph connections for biomedical entities.

MCP server for querying Brazilian CNPJ company data, including partner graphs, address/contact joins, CNAE statistics, and national/annual overviews.

Enables searching the NASA Astrophysics Data System literature with full ADS query syntax, retrieving complete paper records, and exploring citation and reference graphs.

Provides access to Ukraine's public procurement data (ProZorro) via MCP, keyless and integrated with Pipeworx gateway for AI agents.

Enables querying real-time air quality measurements, integrated air quality index (CAI), and monitoring station information from Korea's Air Korea OpenAPI, including station search and nearby station lookup.

Enables querying World Bank Poverty and Inequality Platform data through natural language, integrated with the Pipeworx MCP gateway.

Enables searching academic papers, journals, and citations via the Crossref API, and resolving DOIs to canonical metadata with authors, references, and citation graphs.

Enables searching Korean procurement notices from the public data portal, with support for integrated search across categories, flexible date ranges, and attachment extraction.

Enables searching ArXiv papers, fetching paper details, daily category digests, and exploring author collaboration graphs.

Queries South Korean building register data (e.g., floor area, parking, seismic design) via a single unified tool, converting API responses to Korean field names for easy AI understanding.

Enables resolving academic DOIs to canonical identifiers and generating BibTeX records via CrossRef, and can be integrated into MCP-compliant clients for automated research workflows.

MCP server for LINDAS, the linked-data knowledge graph of the Swiss administration, enabling querying of Swiss public data cubes via guarded SPARQL tools.

A read-only FastMCP server for academic research that lets agents search papers, inspect metadata, follow citation graphs, generate BibTeX, and read full texts of open-access PDFs via semantic scholar, OpenAlex, arXiv, DBLP, and Crossref.

Provides npm/PyPI package intelligence including health scores, vulnerabilities, dependency graphs, and download counts via an MCP server, with optional pay-per-call access over x402 for advanced health and batch endpoints.

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

Enables AI assistants to search, explore, and query any CKAN open data portal through natural language, making public datasets accessible without requiring knowledge of the portal's API.

Enables querying EU-funded research projects and ERC grants from the CORDIS knowledge graph, including full project records and ERC scheme listings, with server-side filtering and attribution.