Search & Discovery MCP Servers

Cat Facts API providing random interesting facts about cats for entertainment and education.

Europe PMC indexes life sciences literature including PubMed, patents, and clinical guidelines. Search publications, retrieve citations, and explore reference networks.

Unpaywall API providing open access status and full-text availability for scholarly articles.

JSONPlaceholder providing fake REST API data for testing and prototyping including posts, users, todos, and comments.

Google Programmable Search Engine (Custom Search JSON API) lets you run web and image searches via API using an API key and a search engine (cx) identifier.

GitHub Zen API providing inspirational quotes and wisdom from the GitHub platform.

Search MCPBundles documentation and blog posts. Returns ranked markdown sections from the official docs site so agents can answer setup, bundle, and integration questions with current guidance.

NCBI E-utilities API providing access to PubMed and other biomedical databases with search and retrieval capabilities.

Internet Archive's Wayback Machine is a digital archive of the World Wide Web. Access historical snapshots of websites, retrieve archived pages, check URL availability across time, and explore billions of saved web pages from the past.

Research Organization Registry (ROR) — a global, open registry of research organizations. Search and retrieve organization metadata by name or identifier.

OpenAlex is an open catalog of the global research system. Search works, retrieve work metadata, and expand citations using an open citation graph.

Harmonic is a startup discovery and enrichment platform with 29M+ companies and 190M+ people. Search, enrich, and manage deal flow with company data, founder profiles, funding history, investor networks, saved searches, and company/people lists.

PubMed Central API providing access to millions of biomedical and life sciences research articles, with full-text search and metadata retrieval.

DataCite DOI registration and scholarly metadata API. Search for research works by keyword, fetch detailed metadata by DOI, and explore citation and relationship graphs.

Directory of Open Access Journals — a curated index of peer-reviewed, open access journals. Search across articles and journals by topic, author, or keyword.

Search DBLP's computer science bibliography, fetch publication records and BibTeX, look up authors and venues, and estimate publication trends from live DBLP results.

bioRxiv and medRxiv preprint servers for biology and health sciences. Search preprints by keyword or date range, retrieve full metadata, and check for published peer-reviewed versions.

Open Library API providing access to the world's largest collection of books, authors, and works with detailed metadata and availability information.

Semantic Scholar Academic Graph, Recommendations, and Datasets APIs — search papers, explore citations, discover authors, get paper recommendations, and search text snippets across 214M+ academic papers. Most endpoints work without authentication; an optional API key provides dedicated rate limits (sent as x-api-key header, case-sensitive per the OpenAPI spec).

Zenodo open research repository hosted by CERN. Search and retrieve research outputs including papers, datasets, and software with DOI-backed metadata, versioning, and file access.

Crunchbase is the leading platform for company intelligence. Search and look up organizations, people, funding rounds, acquisitions, and investors. Requires an Enterprise or Applications license for full API access.

PokéAPI providing detailed Pokémon data including stats, abilities, moves, types, and evolutionary information.

Search and retrieve scientific papers from arXiv. Provides paper metadata (title, authors, abstract, categories) and PDF links via the official arXiv API.

Joke API providing programming jokes and humor for developers and entertainment.