Best search MCP servers

FREE Brazilian marketplace search (ML, Shopee, AliExpress) + import-tax calculator (x402)

Read and write your Caliu notes from any MCP client: search, create, tag, remind, attach files.

KCI (Korea Citation Index) literature & citation search via REST Open API + OAI-PMH

Search, fetch, lint, and install Agent Skills (SKILL.md) from the SkillMD registry.

Microsoft 365 Outlook mail via Graph: read, search, send, reply, forward, draft, move, delete.

Microsoft 365 OneDrive files via Graph: list, search, get, upload, download, share, read text.

50Trust score 50 of 100, Fair

Capture, OCR-search, and retrieve local Mac screenshots for AI agents through Stashot.

Certificate Transparency search for AI agents: certs, subdomains, issuance history, expiry.

bioRxiv/medRxiv/arXiv preprint full text as structured sections for AI agents + search.

Search the Entra.news newsletter archive — a weekly digest of Microsoft Entra news

Persistent memory for AI thinking partnerships: hybrid search and a temporal knowledge graph.

Merka2a MCP server - AI agents search, negotiate and order GPU compute

Code intelligence MCP: symbols, call graphs, change impact + affected tests, routes, search.

Live index of AI agents, MCP servers and tools with observed liveness and capability search.

Persistent local knowledge for AI coding agents with structured records, search, and DOT context.

Pump.fun creator rewards, DexScreener pair search, crypto headlines, and USD candles.

Filesystem-based MCP server for Obsidian vaults — read, search, and edit notes, no app required.

Browserbase MCP server: cloud browser sessions, agents, contexts, fetch, search, functions

Memory for AI agents: persistent L1/L2/L3, web-search savings, thread memory.

Cited web search for MCP hosts. Returns source-bearing results from Groundlink.

50Trust score 50 of 100, Fair

Shop connected e-commerce stores: search, compare, cart, and checkout with buyer approval.

Real-time Amazon product, seller, and search data for AI agents across 21 marketplaces.

Measured AI-inference-storage benchmarks with citations, article search, KV-cache ROI estimation.

Control macOS through Hammerspoon: windows, apps, and API search. Injection-safe by design.