# Search and research MCP servers online

Check the source documentation for each connection.

75 MCP servers. Also on the [web page](https://mcpdirectory.fyi/us/global/online/category/search-research).

## MCP servers

1. [Acquisition.gov](https://mcpdirectory.fyi/us/global/online/acquisition-gov.md), Search and research, Online: Acquisition.gov FAR Overhaul model parts, agency deviations, PDFs, and guidance. 5 tools.
2. [acrawl](https://mcpdirectory.fyi/us/global/online/acrawl.md), Web and browser automation, Online: Autonomous web crawler. 17 browser tools + goal-driven run\_goal agent. Single binary, stealth.
3. [Agent Harnesses](https://mcpdirectory.fyi/us/global/online/agent-harnesses.md), Developer tools, Online: Agent-harness picks, decision guides, setup templates, and skills; live GitHub/HN discovery.
4. [Agent Wikis](https://mcpdirectory.fyi/us/global/online/agent-wikis.md), Knowledge and memory, Online: Maintained, agent-readable knowledge bases with calibrated search and provenance. Pro key adds XL.
5. [Appfigures](https://mcpdirectory.fyi/us/global/online/appfigures.md), Sales and marketing, Online: Access your app analytics, ASO tools, and app market intelligence with Appfigures.
6. [Arxiv Mcp Server](https://mcpdirectory.fyi/us/global/online/arxiv-mcp-server.md), Search and research, Online: Search arXiv papers, download full text, semantic search, citation graphs, and alerts via MCP.
7. [Australian Tax MCP](https://mcpdirectory.fyi/us/global/online/australian-tax-mcp.md), Finance and crypto, Online: Cited Australian tax answers from 34,500+ ATO documents, legislation and public rulings.
8. [Blockrun Mcp](https://mcpdirectory.fyi/us/global/online/blockrun-mcp.md), Search and research, Online: Web search, deep research, prediction markets & crypto data for AI agents. Pay per call via x402.
9. [BLS OEWS](https://mcpdirectory.fyi/us/global/online/bls-oews.md), Search and research, Online: BLS Occupational Employment and Wage Statistics market wages, bundled; no API key. 8 tools.
10. [Clinicaltrialsgov Mcp Server](https://mcpdirectory.fyi/us/global/online/clinicaltrialsgov-mcp-server.md), Health and science, Online: Search ClinicalTrials.gov: find studies, retrieve results, match patients to candidate trials.
11. [CRED-1](https://mcpdirectory.fyi/us/global/online/cred-1.md), Search and research, Online: Domain credibility ratings from the CRED-1 dataset: check, batch check and search news domains
12. [DocPull](https://mcpdirectory.fyi/us/global/online/docpull.md), Search and research, Online: Sync public web sources into cited context packs for AI agents, RAG, and MCP clients.
13. [eCFR](https://mcpdirectory.fyi/us/global/online/ecfr.md), Search and research, Online: Electronic Code of Federal Regulations including FAR, DFARS, and agency supplements. 13 tools.
14. [ENCODE Toolkit](https://mcpdirectory.fyi/us/global/online/encode-toolkit.md), Health and science, Online: 20 MCP tools + 48 skills for ENCODE Project genomics — search, download, pipelines
15. [Eur Lex Mcp Server](https://mcpdirectory.fyi/us/global/online/eur-lex-mcp-server.md), Search and research, Online: Search EU legislation, CJEU case law, and treaties; traverse CELLAR graph; browse EuroVoc concepts.
16. [Everyrow MCP Server](https://mcpdirectory.fyi/us/global/online/everyrow-mcp-server.md), Search and research, Online: Give your AI a research team. Forecast, score, classify, or research every row of a dataset.
17. [Federal Register](https://mcpdirectory.fyi/us/global/online/federal-register.md), Search and research, Online: Federal Register proposed and final rules, notices, executive orders, and FAR cases. 8 tools.
18. [Firecrawl MCP Server](https://mcpdirectory.fyi/us/global/online/firecrawl-mcp-server.md), Web and browser automation, Online: Firecrawl, the context API for AI agents: search, scrape, interact with the web, plus paper search.
19. [Fulltext Article Downloader](https://mcpdirectory.fyi/us/global/online/fulltext-article-downloader.md), Search and research, Online: Full text of research papers by DOI, arXiv, PMC or OpenReview id, verified against the record
20. [GitHits](https://mcpdirectory.fyi/us/global/online/githits.md), Developer tools, Online: Search public open-source code, documentation, metadata, vulnerabilities, changelogs, and examples.
21. [Google Flights](https://mcpdirectory.fyi/us/global/online/google-flights.md), Search and research, Online: MCP server for searching Google Flights — flight search, date grid pricing, and airport lookup.
22. [GSA CALC+](https://mcpdirectory.fyi/us/global/online/gsa-calc.md), Search and research, Online: GSA CALC+ awarded labor ceiling rates from more than 230,000 MAS contract records. 8 tools.
23. [GSA Per Diem](https://mcpdirectory.fyi/us/global/online/gsa-per-diem.md), Finance and crypto, Online: GSA Per Diem access readiness, lodging, and meals and incidental expense rates. 7 tools.
24. [HeyClaude — Claude & AI workflow directory](https://mcpdirectory.fyi/us/global/online/heyclaude-claude-and-ai-workflow-directory.md), Developer tools, Online: Search the HeyClaude directory of Claude Code agents, MCP servers, skills, and tools.
25. [Inspo](https://mcpdirectory.fyi/us/global/online/inspo.md), Developer tools, Online: Real production websites for coding agents: palettes, fonts, fold autopsies and reference JSX.
26. [LastSearch](https://mcpdirectory.fyi/us/global/online/lastsearch.md), Search and research, Online: Evidence-backed web research for AI agents with citations and confidence scores.
27. [Mcp Server](https://mcpdirectory.fyi/us/global/online/mcp-server.md), Other tools, Online: Geospatial intelligence with Mapbox APIs like geocoding, POI search, directions, isochrones, etc.
28. [Openwebninja Mcp](https://mcpdirectory.fyi/us/global/online/openwebninja-mcp.md), Search and research, Online: Official MCP server for OpenWeb Ninja APIs - 40+ real-time web data and SERP APIs as MCP tools
29. [PipesHub](https://mcpdirectory.fyi/us/global/online/pipeshub.md), Search and research, Online: Permissioned search and cited answers over Slack, Drive, Gmail, Jira, and 50+ workplace sources.
30. [Pubchem Mcp Server](https://mcpdirectory.fyi/us/global/online/pubchem-mcp-server.md), Health and science, Online: Search PubChem compounds, properties, safety data, bioactivity, and cross-references.
31. [Pubmed Mcp Server](https://mcpdirectory.fyi/us/global/online/pubmed-mcp-server.md), Health and science, Online: Search PubMed/Europe PMC, fetch articles and full text (PMC/EPMC/Unpaywall), citations, MeSH terms.
32. [Pulse Subregistry](https://mcpdirectory.fyi/us/global/online/pulse-subregistry.md), Developer tools, Online: MCP server providing access to the PulseMCP Sub-Registry for browsing and discovering MCP servers.
33. [Regulations.gov](https://mcpdirectory.fyi/us/global/online/regulations-gov.md), Search and research, Online: Regulations.gov readiness, rulemaking dockets, documents, comments, and comment periods. 9 tools.
34. [Research Hub](https://mcpdirectory.fyi/us/global/online/research-hub.md), Search and research, Online: Research workspace for Zotero + Obsidian + NotebookLM. Search, ingest, sync, verify briefs.
35. [Robin: AI-Powered Dark Web OSINT](https://mcpdirectory.fyi/us/global/online/robin-ai-powered-dark-web-osint.md), Security, Online: Dark web OSINT over Tor: search onion engines, scrape pages, report with your own model.
36. [SAM.gov](https://mcpdirectory.fyi/us/global/online/sam-gov.md), Search and research, Online: SAM.gov readiness, entities, exclusions, opportunities, awards, hierarchy, and subawards. 20 tools.
37. [SearXNG Search](https://mcpdirectory.fyi/us/global/online/searxng-search.md), Search and research, Online: MCP server for SearXNG — privacy-respecting web search with pagination, URL reading
38. [Secedgar Mcp Server](https://mcpdirectory.fyi/us/global/online/secedgar-mcp-server.md), Finance and crypto, Online: Query SEC EDGAR filings, XBRL financials, and company data via MCP. STDIO or Streamable HTTP.
39. [Semantic Scholar MCP Server](https://mcpdirectory.fyi/us/global/online/semantic-scholar-mcp-server.md), Search and research, Online: MCP server for the Semantic Scholar API: search 200M+ papers, citations, authors, recommendations.
40. [Serpapi Hotels](https://mcpdirectory.fyi/us/global/online/serpapi-hotels.md), Search and research, Online: MCP server for searching Google Hotels via SerpAPI — hotel search, pricing, ratings, and reviews.
41. [sqlite-graph-memory](https://mcpdirectory.fyi/us/global/online/sqlite-graph-memory.md), Knowledge and memory, Online: Recall over your markdown notes: vector search plus your \[\[wikilinks\]\] as a graph, in SQLite.
42. [USASpending.gov](https://mcpdirectory.fyi/us/global/online/usaspending-gov.md), Search and research, Online: USAspending.gov contracts, grants, loans, subawards, recipients, agencies, and federal accounts.
43. [Velocirag](https://mcpdirectory.fyi/us/global/online/velocirag.md), Knowledge and memory, Online: Lightning-fast RAG for AI agents. 4-layer fusion, ONNX Runtime, sub-200ms search.
44. [VulnCheck](https://mcpdirectory.fyi/us/global/online/vulncheck.md), Security, Online: VulnCheck exploit intelligence — CVE research, exploit data, advisories, and threat analysis.
45. [webfetch](https://mcpdirectory.fyi/us/global/online/webfetch.md), Search and research, Online: Self-hosted web search for LLM agents: search -\> fetch -\> rank pipeline with semantic caching
46. [Zotero MCP](https://mcpdirectory.fyi/us/global/online/zotero-mcp.md), Search and research, Online: Search your Zotero library, retrieve item metadata, and read full text from AI assistants.
47. [Brave](https://mcpdirectory.fyi/us/global/online/brave.md), Search and research, Online: Visit https://brave.com/search/api/ for a free API key. Search the web, local businesses, images,…
48. [Clera](https://mcpdirectory.fyi/us/global/online/clera.md), Productivity and collaboration, Online: Hire from your AI chat: search 210k+ vetted startup candidates, review matches, request intros.
49. [Embedded Docs](https://mcpdirectory.fyi/us/global/online/embedded-docs.md), Developer tools, Online: Page-cited retrieval for embedded docs, datasheets, MISRA, CMSIS, and RTOS references.
50. [Exa](https://mcpdirectory.fyi/us/global/online/exa.md), Search and research, Online: Connect AI agents to Exa for web search, content fetching, and multi-step research.

This copy lists 50 of 75. The [web page](https://mcpdirectory.fyi/us/global/online/category/search-research) has the rest.

## Other categories in Online

- [Developer tools](https://mcpdirectory.fyi/us/global/online/category/developer-tools.md): 189 MCP servers
- [Finance and crypto](https://mcpdirectory.fyi/us/global/online/category/finance-crypto.md): 124 MCP servers
- [Productivity and collaboration](https://mcpdirectory.fyi/us/global/online/category/productivity-collaboration.md): 80 MCP servers
- [Cloud and DevOps](https://mcpdirectory.fyi/us/global/online/category/cloud-devops.md): 72 MCP servers
- [Knowledge and memory](https://mcpdirectory.fyi/us/global/online/category/knowledge-memory.md): 61 MCP servers
- [Health and science](https://mcpdirectory.fyi/us/global/online/category/health-science.md): 58 MCP servers
- [Security](https://mcpdirectory.fyi/us/global/online/category/security.md): 53 MCP servers
- [Data and databases](https://mcpdirectory.fyi/us/global/online/category/data-databases.md): 46 MCP servers
- [Communication](https://mcpdirectory.fyi/us/global/online/category/communication.md): 42 MCP servers
- [Ecommerce](https://mcpdirectory.fyi/us/global/online/category/ecommerce.md): 35 MCP servers
- [AI and media generation](https://mcpdirectory.fyi/us/global/online/category/ai-media-generation.md): 34 MCP servers
- [Other tools](https://mcpdirectory.fyi/us/global/online/category/other-tools.md): 33 MCP servers
- [Sales and marketing](https://mcpdirectory.fyi/us/global/online/category/sales-marketing.md): 30 MCP servers
- [Web and browser automation](https://mcpdirectory.fyi/us/global/online/category/web-browser-automation.md): 29 MCP servers