llamaindex-lastsearch
LlamaIndex integration for LastSearch — verified web search with citations and confidence scores for AI agents.
Installation
pip install llamaindex-lastsearch
Quick Start
from llama_index.core.agent import ReActAgent
from llama_index.llms.openai import OpenAI
from llamaindex_lastsearch import LastSearchAnswerTool, LastSearchSearchTool
# Create tools
answer_tool = LastSearchAnswerTool(api_key="ls_xxx")
search_tool = LastSearchSearchTool(api_key="ls_xxx")
# Create agent
llm = OpenAI(model="gpt-4o")
agent = ReActAgent.from_tools([answer_tool, search_tool], llm=llm, verbose=True)
# Research with verified answers
response = agent.chat("What are the latest findings on mRNA vaccine efficacy?")
print(response)
Available Tools
LastSearchAnswerTool— Verified research with citations, confidence scores, contradiction detectionLastSearchSearchTool— Web search returning ranked resultsLastSearchExtractTool— Extract structured claims from a URLLastSearchCompareTool— Compare raw LLM vs verified answer
All tools are returned as FunctionTool instances, compatible with any LlamaIndex agent.
Why LastSearch?
Unlike raw search APIs, LastSearch fact-checks results. Every answer includes per-claim verification, cross-source consensus, contradiction detection, and evidence-based confidence scores. Open source (Apache 2.0).
Links
- Website · GitHub · Discord
- Python SDK · LangChain · CrewAI · MCP Server
License
Apache 2.0
Data, privacy and terms
This package sends your requests (queries, URLs and documents you ask it to verify) and your LastSearch API key to the hosted LastSearch API at lastsearch.ai. Queries and results are stored there and used, in aggregate and without identifiers, to improve verification, as described in the Privacy Policy. The package itself collects no telemetry. Use of the hosted API is subject to the Terms.
LastSearch is a free, non-commercial passion project run by an individual developer. Answers, citations and confidence scores are AI-generated research, not professional advice; verify anything important against primary sources.
1 maintainer
Metadata
1 maintainer
Release files for llamaindex-lastsearch 1.0.1
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
|---|---|---|---|---|
| llamaindex_lastsearch-1.0.1.tar.gz | 8.2 kB | Without provenance | Details for llamaindex_lastsearch-1.0.1.tar.gz |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Actions Reset |
|---|---|---|---|---|
| llamaindex_lastsearch-1.0.1-py3-none-any.whl | Python 3 | none | any | Details for llamaindex_lastsearch-1.0.1-py3-none-any.whl |
Total release size: 17.3 kB
Release files / llamaindex_lastsearch-1.0.1.tar.gz
| Download URL | llamaindex_lastsearch-1.0.1.tar.gz |
|---|---|
| Size | 8.2 kB |
| Tags | Source |
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SHA-256 checksum How to use checksums |
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twine/7.0.0 CPython/3.12.15
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Release files / llamaindex_lastsearch-1.0.1-py3-none-any.whl
| Download URL | llamaindex_lastsearch-1.0.1-py3-none-any.whl |
|---|---|
| Size | 9.1 kB |
| Tags | Python 3 |
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SHA-256 checksum How to use checksums |
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No |
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twine/7.0.0 CPython/3.12.15
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