# Overview

LangSearch offers two **Free APIs**: **Free Web Search API** and **Free Rerank API**, designed to connect your LLM applications  to the world, and access clean, accurate, high-quality context.

For individuals and small teams, we offer free access as we build AGI together.

## [**Free Web Search API ->**](https://docs.langsearch.com/api/web-search-api)

Get enhanced search details from billions of web documents, including news, images, videos, and more.

* Hybrid search combining keywords and vectors for enhanced accuracy.
* Long-text summaries from raw content, with support for markdown formatting for improved readability.
* Perfect for individuals and small teams, offering free access as we build AGI together.

<figure><img src="https://2384775432-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F3nYjVicfMpUUb8EkjDHm%2Fuploads%2FOfecSOLJx20egZz9O4Ky%2Fimage.png?alt=media&#x26;token=8cdeab20-6a6d-40c6-b5cd-7a1b9f3d7776" alt=""><figcaption></figcaption></figure>

## [**Free Semantic Rerank API ->**](https://docs.langsearch.com/api/semantic-rerank-api)

Improve the accuracy of your search results with semantic reranking.

* Boosts any existing keyword or vector search system without requiring significant changes to your infrastructure.
* Provides a powerful semantic layer to refine results, ensuring higher relevance.

<figure><img src="https://2384775432-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F3nYjVicfMpUUb8EkjDHm%2Fuploads%2FmYSX5xBRkBvhDQm48nSZ%2Fimage.png?alt=media&#x26;token=a57b010b-1853-4197-a091-b8b219448770" alt=""><figcaption></figcaption></figure>

## **Why LangSearch?**

LangSearch leverages a hybrid search database that combines the power of keyword and vector searches, using advanced **LangSearch Reranker** model to further enhance result accuracy. Whether you’re enhancing web search or optimizing reranking, LangSearch provides the tools to ensure your search systems yield more accurate, meaningful results.


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.langsearch.com/getting-started/overview.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.