Research MCP Servers for Perplexity

OpenAlex MCP — wraps the OpenAlex API (scholarly works, free, no auth)

OpenCitations MCP — citation index (COCI + general Index API).

opendata.swiss MCP — Switzerland's federal open-data portal (CKAN catalogue).

data.gov.my / OpenDOSM (Department of Statistics Malaysia) — official Malaysian open-data API.

OpenReview MCP — ML conference submissions and reviews (API v2)

Open Targets MCP — disease/target/drug knowledge graph.

OpenTopography MCP.

OQMD (Open Quantum Materials Database) MCP.

Patents MCP — wraps the USPTO Open Data Portal (ODP) Patent File Wrapper API

Earth-observation imagery catalogue from Microsoft's Planetary Computer — search its open…

Slovenia Open Data (podatki.gov.si) CKAN MCP.

POWO (Plants of the World Online, by the Royal Botanic Gardens, Kew) MCP.

PubChem MCP — NIH chemistry compound database (no auth)

PubMed MCP — wraps the NCBI E-utilities API (biomedical literature, free, no auth)

PVGIS MCP — EU Joint Research Centre PV system modeler

RCSB PDB MCP — experimentally determined macromolecular structures.

ReliefWeb MCP — the UN OCHA humanitarian information service.

Science MCP — free science data APIs

SIMBAD MCP — CDS astronomical object database.

SingStat Table Builder MCP — Department of Statistics Singapore.

Statistical Office of the Republic of Slovenia (SURS) — SiStat PxWeb MCP.