LastSearch MCP server

Read from the package source without running it. The installed server may list more.

• answer

  Full deep research pipeline: search the web, fetch pages, extract claims, build evidence graph, and generate a structured answer with citations and confidence score. Use depth='thorough' for auto-retry with rephrased queries when confidence is low. Use depth='deep' for multi-step agentic research that identifies knowledge gaps and runs follow-up searches. On thorough/deep, every cited URL is probe

• clarity

  Clarity — anti-hallucination answer engine. Three modes: (1) mode='prompt': Returns only enhanced system + user prompts with anti-hallucination techniques. No LLM call, no internet. Use this when you want YOUR OWN LLM (e.g. Claude) to answer using the enhanced prompts. (2) mode='answer' (default): Rewrites prompt, calls LLM with grounding instructions, returns answer with extracted claims. Fast, n

• compare

  Compare a raw LLM answer (no sources) vs an evidence-backed answer. Shows the difference between hallucination-prone and grounded responses.

• extract

  Extract structured knowledge (claims + sources + confidence) from a single web page using AI.

• feedbackwrite action

  Submit feedback on a search result to improve future accuracy. Helps the self-learning engine tune verification thresholds.

• open

  Fetch and parse a web page into clean text using Readability. Strips ads, nav, and boilerplate.

• search

  Search the web for information on a topic. Returns URLs, titles, snippets, and relevance scores.

• session_ask

  Research a question within a session. Recalls prior knowledge, runs the research pipeline, and stores new claims. Later queries in the same session benefit from accumulated knowledge.

• session_createwrite action

  Create a new research session. Sessions persist knowledge across multiple queries — each query builds on prior research.

• session_fork

  Fork a shared research session to continue building on someone else's research. Creates a copy of all knowledge in your own session.

• session_knowledge

  Export all knowledge from a research session. Returns all verified claims, sources, and confidence scores accumulated across queries.

• session_recall

  Query accumulated knowledge from a session without making new web searches. Returns previously verified claims relevant to the query.

• session_share

  Share a research session publicly. Returns a shareable URL that anyone can view — great for sharing research findings with teammates, in reports, or on social media.

• verify_document

  Fact-check an entire document (AI-generated report, competitive analysis, market research, news article). Pass either raw text OR a URL — we'll extract every atomic claim and verify each against live web sources. Returns per-claim verification status with sources, NLI scores, and an overall A-F grade. Use for auditing the accuracy of long-form content from other AI agents.

• Code scan5 source files scanned25/25
• –Live reliabilityno gateway calls yet and no remote to proben/a
• –Tool poisoningtools not inspected (local package is not executed); not countedn/a
• Auth qualitystatic API keys via environment variables6/15
• Maintenancelast push 5 days ago15/15
• Maintainer identityregistry namespace matches repository owner7/10

LastSearch: common questions

Is LastSearch MCP server safe?

Mostly: it is graded B (82/100). Read the LastSearch safety report

How do I install LastSearch?

It runs on your machine. Copy the Claude Code, Claude Desktop or Cursor config from the install section.

Does LastSearch need an API key?

Yes. The registry entry asks for LASTSEARCH_API_KEY.

Is LastSearch maintained?

The last commit was 5 days ago (2026-09-14). The latest release is v1.1.0.