LangSearch
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LangSearch - Free Web Search API, Free Rerank API, The World Engine for AGI.
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April 14, 2025
LangSearch Product Information
Ever wondered how you can enhance your LLM applications with a touch of real-world context? Well, let me introduce you to LangSearch, a game-changer in the world of search technology. They offer two nifty Free APIs: the Free Web Search API and the Free Rerank API, designed to connect your applications to a wealth of clean, accurate, and high-quality information. And the best part? If you're an individual or part of a small team, you get free access as we all work together to build AGI!
Core APIs
1. Free Web Search API
Imagine diving into billions of web documents, from the latest news to eye-catching images and engaging videos. The Free Web Search API makes this possible with a hybrid search approach that blends keywords and vectors for pinpoint accuracy. Not only does it give you enhanced search details, but it also provides long-text summaries from raw content, all nicely formatted with markdown for easy reading. It's perfect for anyone looking to supercharge their search capabilities without breaking the bank.
2. Free Semantic Rerank API
Want to take your search results from good to great? The Free Semantic Rerank API is here to help. It boosts the accuracy of any existing keyword or vector search system without requiring you to overhaul your infrastructure. By adding a powerful semantic layer, it refines your results to ensure they're as relevant as possible. It's like having a smart assistant that fine-tunes your search outcomes to perfection.
Core Products
1. LangSearch Database - A Hybrid Search Database for the Next Generation of Search
The LangSearch Database isn't just another search tool; it's a cutting-edge hybrid search database that's redefining how we find information. By combining traditional keyword-based search with advanced vector-based search, it delivers highly relevant and accurate results. It's optimized for AI-driven applications, understanding not just what you're searching for, but why. Whether you're managing large-scale data or fine-tuning your search experience, LangSearchDB is your go-to for powerful, high-performance search capabilities. It's the backbone behind the Web Search API, giving you seamless access to a vast array of web documents, images, videos, and more, all with a focus on context and intent.
2. LangSearch Reranker - Intelligent Ranking for Enhanced Search Results
Ever felt like your search results could be more relevant? The LangSearch Reranker is here to fix that. This powerful text-semantic-based ranking model uses deep learning and the Transformer architecture to optimize your initial search results. Whether you're using keyword search, vector search, or a hybrid approach, the LangSearch Reranker ensures your results are not just relevant, but precisely ranked to enhance your overall user experience. It's like having a personal search curator that always gets it right.
Why LangSearch?
LangSearch isn't just about searching; it's about finding what you need with precision and ease. By leveraging a hybrid search database that combines keyword and vector searches, and using the advanced LangSearch Reranker model, LangSearch ensures your search systems deliver more accurate and meaningful results. Whether you're enhancing web search or optimizing reranking, LangSearch provides the tools you need to make your search experience truly exceptional.
How to Use LangSearch?
Ready to dive into LangSearch? Here's how you can get started:
1. **Create an Account and Get Your Free API Key**: Head over to https://langsearch.com/api-keys and sign up to grab your free API key. It's your golden ticket to the world of LangSearch.
2. **Your First LangSearch**: Whether you're using the official API, LLM tools, or AI Agent Plugins, you're just a few steps away from your first LangSearch experience.
3. **Try the Web Search API**:
a. **Using cURL**:
curl --location 'https://api.langsearch.com/v1/web-search' --header 'Authorization: Bearer YOUR-API-KEY' --header 'Content-Type: application/json' --data '{"query": "tell me the highlights from Apple 2024 ESG report","freshness": "noLimit","summary": true,"count": 10}'b. **Using Python**:
import requests
import json
url = "https://api.langsearch.com/v1/web-search"
payload = json.dumps({"query": "tell me the highlights from Apple's 2024 ESG report","freshness": "noLimit","summary": True,"livecrawl": True,"count": 10})
headers = {'Authorization': 'Bearer YOUR-API-KEY','Content-Type': 'application/json'}
response = requests.request("POST", url, headers=headers, data=payload)
print(response.text)
4. **Try the Semantic Rerank API**:
a. **Using cURL**:
curl --location 'https://api.langsearch.com/v1/rerank' --header 'Authorization: Bearer YOUR-API-KEY' --header 'Content-Type: application/json' --data '{"model": "langsearch-reranker-v1","query": "Tell me the key points of Alibaba 2024 ESG report","top_n": 2,"return_documents": true,"documents": ["Alibaba Group released the 2024 Environmental, Social, and Governance (ESG) report, detailing the progress made in various ESG areas over the past year. The report shows that Alibaba has steadily advanced its carbon reduction efforts, with the group's net carbon emissions and carbon intensity of the value chain continuing to decrease. The group also continues to leverage digital technologies and platform capabilities to support accessible development, healthcare, aging-friendly services, and small and micro enterprises. Alibaba Group's CEO, Wu Yongming, stated in the report: 'The core of ESG is about becoming a better company. Over the past 25 years, the actions related to ESG have formed the foundation of Alibaba, which is just as important as the commercial value we create. While the group is focused on the dual business strategies of 'user-first' and 'AI-driven,' we also remain committed to ESG as one of Alibaba's cornerstone strategies. Alibaba has made solid progress in reducing carbon emissions.'","The core of ESG is about becoming a better company. This year marks the 25th anniversary of Alibaba. Over the past 25 years, Alibaba has adhered to its mission of 'making it easy to do business everywhere,' supporting the prosperity of domestic e-commerce; maintaining an open ecosystem, with the Magic搭 community opening over 3,800 open-source models; assisting in rural revitalization, having sent 29 rural special envoys to 27 counties; promoting platform carbon reduction, pioneering a Scope 3+ carbon reduction plan; and engaging in employee welfare, with the 'Everyone 3 Hours' initiative making small but meaningful changes... These actions form the foundation of Alibaba, which is just as important as creating commercial value. I hope that every Alibaba employee will learn to make difficult but correct choices, maintaining foresight, goodwill, and pragmatism. A better Alibaba is worth our collective efforts. Alibaba's mission, unchanged for over 20 years, is to make it easy to do business in the world. Today, this mission takes on new significance in this era."]}'b. **Using Python**:
import requests
import json
url = "https://api.langsearch.com/v1/rerank"
payload = json.dumps({"model": "langsearch-reranker-v1","query": "Tell me the key points of Alibaba 2024 ESG report","top_n": 2,"return_documents": True,"documents": ["Alibaba Group released the 2024 Environmental, Social, and Governance (ESG) report, detailing the progress made in various ESG areas over the past year. The report shows that Alibaba has steadily advanced its carbon reduction efforts, with the group's net carbon emissions and carbon intensity of the value chain continuing to decrease. The group also continues to leverage digital technologies and platform capabilities to support accessible development, healthcare, aging-friendly services, and small and micro enterprises. Alibaba Group's CEO, Wu Yongming, stated in the report: 'The core of ESG is about becoming a better company. Over the past 25 years, the actions related to ESG have formed the foundation of Alibaba, which is just as important as the commercial value we create. While the group is focused on the dual business strategies of 'user-first' and 'AI-driven,' we also remain committed to ESG as one of Alibaba's cornerstone strategies. Alibaba has made solid progress in reducing carbon emissions.'","The core of ESG is about becoming a better company. This year marks the 25th anniversary of Alibaba. Over the past 25 years, Alibaba has adhered to its mission of 'making it easy to do business everywhere,' supporting the prosperity of domestic e-commerce; maintaining an open ecosystem, with the Magic搭 community opening over 3,800 open-source models; assisting in rural revitalization, having sent 29 rural special envoys to 27 counties; promoting platform carbon reduction, pioneering a Scope 3+ carbon reduction plan; and engaging in employee welfare, with the 'Everyone 3 Hours' initiative making small but meaningful changes... These actions form the foundation of Alibaba, which is just as important as creating commercial value. I hope that every Alibaba employee will learn to make difficult but correct choices, maintaining foresight, goodwill, and pragmatism. A better Alibaba is worth our collective efforts. Alibaba's mission, unchanged for over 20 years, is to make it easy to do business in the world. Today, this mission takes on new significance in this era."]})
headers = {'Authorization': 'Bearer YOUR-API-KEY','Content-Type': 'application/json'}
response = requests.request("POST", url, headers=headers, data=payload)
print(response.text)
LangSearch's Core Features
Free Web Search API
The Free Web Search API is your gateway to billions of web documents. With its hybrid search capabilities, it combines keywords and vectors to deliver enhanced search details, complete with long-text summaries and markdown formatting for better readability. It's the perfect tool for individuals and small teams looking to access high-quality context without any cost.
Free Rerank API
The Free Rerank API is all about improving the accuracy of your search results. It adds a semantic layer to any existing search system, refining results to ensure they're as relevant as possible. It's a must-have for anyone looking to boost their search experience without significant changes to their infrastructure.
LangSearch Database - Hybrid Search Database
The LangSearch Database is the next generation of search technology. It's a hybrid search database that combines the strengths of keyword and vector searches to deliver highly relevant and accurate results. Optimized for AI-driven applications, it understands context and intent, making it ideal for large-scale data management and fine-tuning your search experience.
For any support, customer service, or refund inquiries, you can reach out to LangSearch via their contact us page. And if you're curious about the company behind this innovative technology, you can find more information on their about us page. To get started, simply log in or sign up using the provided links.
LangSearch Screenshot
LangSearch Reviews
Would you recommend LangSearch? Post your comment
LangSearch is a lifesaver for my LLM projects! The Free Web Search API is so easy to use and really adds that real-world context I need. Just wish the Re API was a bit more stable. Still, it's a must-have for anyone in the search tech space! 👍
LangSearch 덕분에 LLM 프로젝트가 훨씬 쉬워졌어요! Free Web Search API가 사용하기 쉽고 실제 세계의 맥락을 추가할 수 있어서 좋습니다. 다만, Re API가 좀 더 안정적이었으면 좋겠어요. 그래도 검색 기술에 종사하는 사람들에게는 필수죠! 👍
LangSearch é um salva-vidas para meus projetos LLM! A Free Web Search API é tão fácil de usar e realmente adiciona o contexto do mundo real que eu preciso. Só gostaria que a Re API fosse um pouco mais estável. Ainda assim, é essencial para quem trabalha com tecnologia de busca! 👍
LangSearchのおかげでLLMのプロジェクトがずっと楽になりました！Free Web Search APIが使いやすくて、実世界のコンテキストが追加できるのが嬉しいです。ただ、Re APIがもう少し安定してくれたらなと思います。それでも、検索技術に携わる人には必須ですね！👍
LangSearch es un salvavidas para mis proyectos LLM! La Free Web Search API es tan fácil de usar y realmente añade el contexto del mundo real que necesito. Solo desearía que la Re API fuera un poco más estable. Aún así, es imprescindible para cualquiera en el espacio de la tecnología de búsqueda! 👍
