"Resources or tools for conducting in-depth research" matching MCP connectors:

MCP server for German & EU law. Verified, citable legal context for any LLM. Daily updates from official sources, hosted in Germany

Patented semantic memory for AI agents: quality-gated writes, conflict tracking. Free trial.

Connect your AI to any database — PostgreSQL, MySQL, or SQL Server — in seconds.

The first low-latency wire service purpose-built for AI agents. Ingests 54+ public APIs and 71k RSS feeds across 232 countries, outputs CWF (Cognitive Wire Format) – 80% shorter than JSON, sub-second WebSocket delivery. 9 MCP tools: get_latest_signals, search_signals, get_fused_signal, scope_signals, get_facet_manifest, list_facets, get_related_signals, list_data_sources, get_billing_profile. 26 citable fusion products with verifiable formulas – no black-box scores.

For queries a model can't confidently place: resolves or declines. Built to decline, not guess.

Deterministic AI agent microtools, no accounts/API keys. fetch_extract: 98% token cut. 38 tools.

AI-first file sharing and collaboration. 251 tools give agents a full workspace: file storage, branded shares, comments, workflows, and built-in RAG. 50GB free, no credit card.

Read-only answers and semantic search for wiki.private.law, served by the Mothership runtime.

**ColdState Knowledge Search MCP Server** https://github.com/daniel-coldstate/coldstate-mcp Semantic search over 64.6M knowledge entries — the structured alternative to web search APIs and web scraping for LLM agents. No crawling, no rate limits, sub-3s responses. Cloud-hosted at services.coldstate.ai

Free MCP API to create AI chat personas for websites — upload knowledge, search, and chat

Pay-per-call agent tools over x402: site audits, llms.txt generation, wallet watch, catalog.

Live MCP connector for Develust Technology's services — web development, infrastructure, backend architecture. Hybrid search with AI reranking for accurate results. No auth required.

Turn a GitHub repo or docs site into agent-ready context: pack it or search it, over MCP.

Objective-driven deep research: free daily quick search plus MPP-paid cross-source browser reports.

Persistent project context for xAI Grok. IANA-registered .faf format.

Semantic search over the Stoic corpus — Marcus Aurelius' Meditations, Seneca's essays, and Epictetus' Discourses, Enchiridion and Fragments. Search by theme or citation, fetch any passage, or get the daily reflection. Public domain translations, no auth.

Free mechanical checks for AI text: unnamed counts, dangling references, bad arithmetic, misquotes.

Free OpenAI-compatible inference with signed provenance receipts and 3 focused MCP tools.

Source-traced evidence research for AI agents. We organise the evidence; you decide.

Persistent semantic memory for AI agents: store and recall text by meaning (RAG). x402