# AWS

The `LangChain` integrations related to [Amazon AWS](https://aws.amazon.com/) platform.

## LLMs

### Bedrock

>[Amazon Bedrock](https://aws.amazon.com/bedrock/) is a fully managed service that offers a choice of 
> high-performing foundation models (FMs) from leading AI companies like `AI21 Labs`, `Anthropic`, `Cohere`, 
> `Meta`, `Stability AI`, and `Amazon` via a single API, along with a broad set of capabilities you need to 
> build generative AI applications with security, privacy, and responsible AI. Using `Amazon Bedrock`, 
> you can easily experiment with and evaluate top FMs for your use case, privately customize them with 
> your data using techniques such as fine-tuning and `Retrieval Augmented Generation` (`RAG`), and build 
> agents that execute tasks using your enterprise systems and data sources. Since `Amazon Bedrock` is 
> serverless, you don't have to manage any infrastructure, and you can securely integrate and deploy 
> generative AI capabilities into your applications using the AWS services you are already familiar with.

 
See a [usage example](/docs/integrations/llms/bedrock).

```python
from langchain.llms.bedrock import Bedrock
```

### Amazon API Gateway

>[Amazon API Gateway](https://aws.amazon.com/api-gateway/) is a fully managed service that makes it easy for 
> developers to create, publish, maintain, monitor, and secure APIs at any scale. APIs act as the "front door" 
> for applications to access data, business logic, or functionality from your backend services. Using 
> `API Gateway`, you can create RESTful APIs and WebSocket APIs that enable real-time two-way communication 
> applications. `API Gateway` supports containerized and serverless workloads, as well as web applications.
> 
> `API Gateway` handles all the tasks involved in accepting and processing up to hundreds of thousands of 
> concurrent API calls, including traffic management, CORS support, authorization and access control, 
> throttling, monitoring, and API version management. `API Gateway` has no minimum fees or startup costs. 
> You pay for the API calls you receive and the amount of data transferred out and, with the `API Gateway` 
> tiered pricing model, you can reduce your cost as your API usage scales.

See a [usage example](/docs/integrations/llms/amazon_api_gateway).

```python
from langchain.llms import AmazonAPIGateway
```

### SageMaker Endpoint

>[Amazon SageMaker](https://aws.amazon.com/sagemaker/) is a system that can build, train, and deploy 
> machine learning (ML) models with fully managed infrastructure, tools, and workflows.

We use `SageMaker` to host our model and expose it as the `SageMaker Endpoint`.

See a [usage example](/docs/integrations/llms/sagemaker).

```python
from langchain.llms import SagemakerEndpoint
from langchain.llms.sagemaker_endpoint import LLMContentHandler
```

## Chat models

### Bedrock Chat

See a [usage example](/docs/integrations/chat/bedrock).

```python
from langchain.chat_models import BedrockChat
```

## Text Embedding Models

### Bedrock

See a [usage example](/docs/integrations/text_embedding/bedrock).
```python
from langchain.embeddings import BedrockEmbeddings
```

### SageMaker Endpoint

See a [usage example](/docs/integrations/text_embedding/sagemaker-endpoint).
```python
from langchain.embeddings import SagemakerEndpointEmbeddings
from langchain.llms.sagemaker_endpoint import ContentHandlerBase
```

## Chains

### Amazon Comprehend Moderation Chain

>[Amazon Comprehend](https://aws.amazon.com/comprehend/) is a natural-language processing (NLP) service that 
> uses machine learning to uncover valuable insights and connections in text.


We need to install the `boto3` and `nltk` libraries.

```bash
pip install boto3 nltk
```

See a [usage example](/docs/guides/safety/amazon_comprehend_chain).

```python
from langchain_experimental.comprehend_moderation import AmazonComprehendModerationChain
```

## Document loaders

### AWS S3 Directory and File

>[Amazon Simple Storage Service (Amazon S3)](https://docs.aws.amazon.com/AmazonS3/latest/userguide/using-folders.html)
> is an object storage service.
>[AWS S3 Directory](https://docs.aws.amazon.com/AmazonS3/latest/userguide/using-folders.html)
>[AWS S3 Buckets](https://docs.aws.amazon.com/AmazonS3/latest/userguide/UsingBucket.html)

See a [usage example for S3DirectoryLoader](/docs/integrations/document_loaders/aws_s3_directory).

See a [usage example for S3FileLoader](/docs/integrations/document_loaders/aws_s3_file).

```python
from langchain.document_loaders import S3DirectoryLoader, S3FileLoader
```

### Amazon Textract

>[Amazon Textract](https://docs.aws.amazon.com/managedservices/latest/userguide/textract.html) is a machine 
> learning (ML) service that automatically extracts text, handwriting, and data from scanned documents.

See a [usage example](/docs/integrations/document_loaders/amazon_textract).

```python
from langchain.document_loaders import AmazonTextractPDFLoader
```

## Memory

### AWS DynamoDB

>[AWS DynamoDB](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/dynamodb/index.html) 
> is a fully managed `NoSQL` database service that provides fast and predictable performance with seamless scalability.
 
We have to configure the [AWS CLI](https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-configure.html). 

We need to install the `boto3` library.

```bash
pip install boto3
```

See a [usage example](/docs/integrations/memory/aws_dynamodb).

```python
from langchain.memory import DynamoDBChatMessageHistory
```

## Retrievers

### Amazon Kendra

> [Amazon Kendra](https://docs.aws.amazon.com/kendra/latest/dg/what-is-kendra.html) is an intelligent search service 
> provided by `Amazon Web Services` (`AWS`). It utilizes advanced natural language processing (NLP) and machine 
> learning algorithms to enable powerful search capabilities across various data sources within an organization. 
> `Kendra` is designed to help users find the information they need quickly and accurately, 
> improving productivity and decision-making.

> With `Kendra`, we can search across a wide range of content types, including documents, FAQs, knowledge bases, 
> manuals, and websites. It supports multiple languages and can understand complex queries, synonyms, and 
> contextual meanings to provide highly relevant search results.

We need to install the `boto3` library.

```bash
pip install boto3
```

See a [usage example](/docs/integrations/retrievers/amazon_kendra_retriever).

```python
from langchain.retrievers import AmazonKendraRetriever
```

### Amazon Bedrock (Knowledge Bases)

> [Knowledge bases for Amazon Bedrock](https://aws.amazon.com/bedrock/knowledge-bases/) is an 
> `Amazon Web Services` (`AWS`) offering which lets you quickly build RAG applications by using your 
> private data to customize foundation model response.

We need to install the `boto3` library.

```bash
pip install boto3
```

See a [usage example](/docs/integrations/retrievers/amazon_bedrock_knowledge_bases).

```python
from langchain.retrievers import AmazonKnowledgeBasesRetriever
```

## Vector stores

### Amazon OpenSearch Service

> [Amazon OpenSearch Service](https://aws.amazon.com/opensearch-service/) performs 
> interactive log analytics, real-time application monitoring, website search, and more. `OpenSearch` is 
> an open source, 
> distributed search and analytics suite derived from `Elasticsearch`. `Amazon OpenSearch Service` offers the 
> latest versions of `OpenSearch`, support for many versions of `Elasticsearch`, as well as 
> visualization capabilities powered by `OpenSearch Dashboards` and `Kibana`.

We need to install several python libraries.

```bash
pip install boto3 requests requests-aws4auth
```

See a [usage example](/docs/integrations/vectorstores/opensearch#using-aos-amazon-opensearch-service).

```python
from langchain.vectorstores import OpenSearchVectorSearch
```

## Tools

### AWS Lambda

>[`Amazon AWS Lambda`](https://aws.amazon.com/pm/lambda/) is a serverless computing service provided by 
> `Amazon Web Services` (`AWS`). It helps developers to build and run applications and services without 
> provisioning or managing servers. This serverless architecture enables you to focus on writing and 
> deploying code, while AWS automatically takes care of scaling, patching, and managing the 
> infrastructure required to run your applications.

We need to install `boto3` python library.

```bash
pip install boto3
```

See a [usage example](/docs/integrations/tools/awslambda).


## Callbacks

### SageMaker Tracking

>[Amazon SageMaker](https://aws.amazon.com/sagemaker/) is a fully managed service that is used to quickly 
> and easily build, train and deploy machine learning (ML) models.

>[Amazon SageMaker Experiments](https://docs.aws.amazon.com/sagemaker/latest/dg/experiments.html) is a capability 
> of `Amazon SageMaker` that lets you organize, track, 
> compare and evaluate ML experiments and model versions.
 
We need to install several python libraries.

```bash
pip install google-search-results sagemaker
```

See a [usage example](/docs/integrations/callbacks/sagemaker_tracking).

```python
from langchain.callbacks import SageMakerCallbackHandler
```
