There are more AWS SDK examples available in the [AWS Doc SDK Examples](https://github.com/awsdocs/aws-doc-sdk-examples) GitHub repo.

# Code examples for Amazon Bedrock using AWS SDKs
<a name="bedrock_code_examples"></a>

The following code examples show you how to use Amazon Bedrock with an AWS software development kit (SDK).

*Actions* are code excerpts from larger programs and must be run in context. While actions show you how to call individual service functions, you can see actions in context in their related scenarios.

*Scenarios* are code examples that show you how to accomplish specific tasks by calling multiple functions within a service or combined with other AWS services.

**More resources**
+  **[ Amazon Bedrock User Guide](https://docs.aws.amazon.com/bedrock/latest/userguide/what-is-bedrock.html)** – More information about Amazon Bedrock.
+ **[Amazon Bedrock API Reference](https://docs.aws.amazon.com/bedrock/latest/APIReference/welcome.html)** – Details about all available Amazon Bedrock actions.
+ **[AWS Developer Center](https://aws.amazon.com/developer/code-examples/?awsf.sdk-code-examples-product=product%23bedrock)** – Code examples that you can filter by category or full-text search.
+ **[AWS SDK Examples](https://github.com/awsdocs/aws-doc-sdk-examples)** – GitHub repo with complete code in preferred languages. Includes instructions for setting up and running the code.

**Contents**
+ [Basics](bedrock_code_examples_basics.md)
  + [Hello Amazon Bedrock](bedrock_example_bedrock_Hello_section.md)
  + [Actions](bedrock_code_examples_actions.md)
    + [`GetFoundationModel`](bedrock_example_bedrock_GetFoundationModel_section.md)
    + [`ListFoundationModels`](bedrock_example_bedrock_ListFoundationModels_section.md)
+ [Scenarios](bedrock_code_examples_scenarios.md)
  + [Orchestrate generative AI applications with Step Functions](bedrock_example_cross_ServerlessPromptChaining_section.md)

# Basic examples for Amazon Bedrock using AWS SDKs
<a name="bedrock_code_examples_basics"></a>

The following code examples show how to use the basics of Amazon Bedrock with AWS SDKs. 

**Contents**
+ [Hello Amazon Bedrock](bedrock_example_bedrock_Hello_section.md)
+ [Actions](bedrock_code_examples_actions.md)
  + [`GetFoundationModel`](bedrock_example_bedrock_GetFoundationModel_section.md)
  + [`ListFoundationModels`](bedrock_example_bedrock_ListFoundationModels_section.md)

# Hello Amazon Bedrock
<a name="bedrock_example_bedrock_Hello_section"></a>

The following code examples show how to get started using Amazon Bedrock.

------
#### [ .NET ]

**SDK for .NET (v4)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv4/Bedrock#code-examples). 

```
using Amazon;
using Amazon.Bedrock;
using Amazon.Bedrock.Model;

namespace BedrockActions;

/// <summary>
/// This example shows how to list foundation models.
/// </summary>
internal class HelloBedrock
{
    /// <summary>
    /// Main method to call the ListFoundationModelsAsync method.
    /// </summary>
    /// <param name="args"> The command line arguments. </param>
    static async Task Main(string[] args)
    {
        // Specify a region endpoint where Amazon Bedrock is available. For a list of supported region see https://docs.aws.amazon.com/bedrock/latest/userguide/what-is-bedrock.html#bedrock-regions
        AmazonBedrockClient bedrockClient = new(RegionEndpoint.USWest2);

        await ListFoundationModelsAsync(bedrockClient);

    }


    /// <summary>
    /// List foundation models.
    /// </summary>
    /// <param name="bedrockClient"> The Amazon Bedrock client. </param>
    private static async Task ListFoundationModelsAsync(AmazonBedrockClient bedrockClient)
    {
        Console.WriteLine("List foundation models with no filter.");

        try
        {
            var response = await bedrockClient.ListFoundationModelsAsync(new ListFoundationModelsRequest()
            {
            });

            if (response?.HttpStatusCode == System.Net.HttpStatusCode.OK)
            {
                foreach (var fm in response.ModelSummaries)
                {
                    WriteToConsole(fm);
                }
            }
            else
            {
                Console.WriteLine("Something wrong happened");
            }
        }
        catch (AmazonBedrockException e)
        {
            Console.WriteLine(e.Message);
        }
    }


    /// <summary>
    /// Write the foundation model summary to console.
    /// </summary>
    /// <param name="foundationModel"> The foundation model summary to write to console. </param>
    private static void WriteToConsole(FoundationModelSummary foundationModel)
    {
        Console.WriteLine($"{foundationModel.ModelId}, Customization: {string.Join(", ", foundationModel.CustomizationsSupported)}, Stream: {foundationModel.ResponseStreamingSupported}, Input: {string.Join(", ", foundationModel.InputModalities)}, Output: {string.Join(", ", foundationModel.OutputModalities)}");
    }
}
```
+  For API details, see [ListFoundationModels](https://docs.aws.amazon.com/goto/DotNetSDKV4/bedrock-2023-04-20/ListFoundationModels) in *AWS SDK for .NET API Reference*. 

------
#### [ Go ]

**SDK for Go V2**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/bedrock#code-examples). 

```
package main

import (
	"context"
	"fmt"

	"github.com/aws/aws-sdk-go-v2/config"
	"github.com/aws/aws-sdk-go-v2/service/bedrock"
)

const region = "us-east-1"

// main uses the AWS SDK for Go (v2) to create an Amazon Bedrock client and
// list the available foundation models in your account and the chosen region.
// This example uses the default settings specified in your shared credentials
// and config files.
func main() {
	ctx := context.Background()
	sdkConfig, err := config.LoadDefaultConfig(ctx, config.WithRegion(region))
	if err != nil {
		fmt.Println("Couldn't load default configuration. Have you set up your AWS account?")
		fmt.Println(err)
		return
	}
	bedrockClient := bedrock.NewFromConfig(sdkConfig)
	result, err := bedrockClient.ListFoundationModels(ctx, &bedrock.ListFoundationModelsInput{})
	if err != nil {
		fmt.Printf("Couldn't list foundation models. Here's why: %v\n", err)
		return
	}
	if len(result.ModelSummaries) == 0 {
		fmt.Println("There are no foundation models.")
	}
	for _, modelSummary := range result.ModelSummaries {
		fmt.Println(*modelSummary.ModelId)
	}
}
```
+  For API details, see [ListFoundationModels](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/bedrock#Client.ListFoundationModels) in *AWS SDK for Go API Reference*. 

------
#### [ JavaScript ]

**SDK for JavaScript (v3)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javascriptv3/example_code/bedrock#code-examples). 

```
import { fileURLToPath } from "node:url";

import {
  BedrockClient,
  ListFoundationModelsCommand,
} from "@aws-sdk/client-bedrock";

const REGION = "us-east-1";
const client = new BedrockClient({ region: REGION });

export const main = async () => {
  const command = new ListFoundationModelsCommand({});

  const response = await client.send(command);
  const models = response.modelSummaries;

  console.log("Listing the available Bedrock foundation models:");

  for (const model of models) {
    console.log("=".repeat(42));
    console.log(` Model: ${model.modelId}`);
    console.log("-".repeat(42));
    console.log(` Name: ${model.modelName}`);
    console.log(` Provider: ${model.providerName}`);
    console.log(` Model ARN: ${model.modelArn}`);
    console.log(` Input modalities: ${model.inputModalities}`);
    console.log(` Output modalities: ${model.outputModalities}`);
    console.log(` Supported customizations: ${model.customizationsSupported}`);
    console.log(` Supported inference types: ${model.inferenceTypesSupported}`);
    console.log(` Lifecycle status: ${model.modelLifecycle.status}`);
    console.log(`${"=".repeat(42)}\n`);
  }

  const active = models.filter(
    (m) => m.modelLifecycle.status === "ACTIVE",
  ).length;
  const legacy = models.filter(
    (m) => m.modelLifecycle.status === "LEGACY",
  ).length;

  console.log(
    `There are ${active} active and ${legacy} legacy foundation models in ${REGION}.`,
  );

  return response;
};

// Invoke main function if this file was run directly.
if (process.argv[1] === fileURLToPath(import.meta.url)) {
  await main();
}
```
+  For API details, see [ListFoundationModels](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/bedrock/command/ListFoundationModelsCommand) in *AWS SDK for JavaScript API Reference*. 

------
#### [ Python ]

**SDK for Python (Boto3)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/bedrock#code-examples). 

```
"""
Lists the available Amazon Bedrock models.
"""
import logging
import json
import boto3


from botocore.exceptions import ClientError


logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)


def list_foundation_models(bedrock_client):
    """
    Gets a list of available Amazon Bedrock foundation models.

    :return: The list of available bedrock foundation models.
    """

    try:
        response = bedrock_client.list_foundation_models()
        models = response["modelSummaries"]
        logger.info("Got %s foundation models.", len(models))
        return models

    except ClientError:
        logger.error("Couldn't list foundation models.")
        raise


def main():
    """Entry point for the example. Uses the AWS SDK for Python (Boto3)
    to create an Amazon Bedrock client. Then lists the available Bedrock models
    in the region set in the callers profile and credentials.
    """

    bedrock_client = boto3.client(service_name="bedrock")

    fm_models = list_foundation_models(bedrock_client)
    for model in fm_models:
        print(f"Model: {model['modelName']}")
        print(json.dumps(model, indent=2))
        print("---------------------------\n")

    logger.info("Done.")


if __name__ == "__main__":
    main()
```
+  For API details, see [ListFoundationModels](https://docs.aws.amazon.com/goto/boto3/bedrock-2023-04-20/ListFoundationModels) in *AWS SDK for Python (Boto3) API Reference*. 

------
#### [ Swift ]

**SDK for Swift**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/swift/example_code/bedrock#code-examples). 

```
import ArgumentParser
import AWSClientRuntime
import Foundation

import AWSBedrock

struct ExampleCommand: ParsableCommand {
    static var configuration = CommandConfiguration(
        commandName: "ListFoundationModels",
        abstract: """
        This example demonstrates how to retrieve a list of the available
        foundation models from Amazon Bedrock.
        """,
        discussion: """
        """
    )

    /// Construct a string listing the specified modalities.
    /// 
    /// - Parameter modalities: An array of the modalities to list.
    ///
    /// - Returns: A string with a human-readable list of modalities.
    func buildModalityList(modalities: [BedrockClientTypes.ModelModality]?) -> String {
        var first = true
        var str = ""

        if modalities == nil {
            return "<none>"
        }

        for modality in modalities! {
            if !first {
                str += ", "
            }
            first = false
            str += modality.rawValue
        }

        return str
    }

    /// Construct a string listing the specified customizations.
    /// 
    /// - Parameter customizations: An array of the customizations to list.
    /// 
    /// - Returns: A string listing the customizations.
    func buildCustomizationList(customizations: [BedrockClientTypes.ModelCustomization]?) -> String {
        var first = true
        var str = ""

        if customizations == nil {
            return "<none>"
        }

        for customization in customizations! {
            if !first {
                str += ", "
            }
            first = false
            str += customization.rawValue
        }

        return str
    }

    /// Construct a string listing the specified inferences.
    /// 
    /// - Parameter inferences: An array of inferences to list.
    /// 
    /// - Returns: A string listing the specified inferences.
    func buildInferenceList(inferences: [BedrockClientTypes.InferenceType]?) -> String {
        var first = true
        var str = ""

        if inferences == nil {
            return "<none>"
        }

        for inference in inferences! {
            if !first {
                str += ", "
            }
            first = false
            str += inference.rawValue
        }

        return str
    }

    /// Called by ``main()`` to run the bulk of the example.
    func runAsync() async throws {
        // Always use the Region "us-east-1" to have access to the most models.
        let config = try await BedrockClient.BedrockClientConfiguration(region: "us-east-1")
        let bedrockClient = BedrockClient(config: config)

        let output = try await bedrockClient.listFoundationModels(
            input: ListFoundationModelsInput()
        )

        guard let summaries = output.modelSummaries else {
            print("No models returned.")
            return
        }
        
        // Output a list of the models with their details.
        for summary in summaries {
            print("==========================================")
            print(" Model ID: \(summary.modelId ?? "<unknown>")")
            print("------------------------------------------")
            print(" Name: \(summary.modelName ?? "<unknown>")")
            print(" Provider: \(summary.providerName ?? "<unknown>")")
            print(" Input modalities: \(buildModalityList(modalities: summary.inputModalities))")
            print(" Output modalities: \(buildModalityList(modalities: summary.outputModalities))")
            print(" Supported customizations: \(buildCustomizationList(customizations: summary.customizationsSupported ))")
            print(" Supported inference types: \(buildInferenceList(inferences: summary.inferenceTypesSupported))")
            print("------------------------------------------\n")
        }
        
        print("\(summaries.count) models available.")
    }
}

/// The program's asynchronous entry point.
@main
struct Main {
    static func main() async {
        let args = Array(CommandLine.arguments.dropFirst())

        do {
            let command = try ExampleCommand.parse(args)
            try await command.runAsync()
        } catch {
            ExampleCommand.exit(withError: error)
        }
    }    
}
```
+  For API details, see [ListFoundationModels](https://sdk.amazonaws.com/swift/api/awsbedrock/latest/documentation/awsbedrock/bedrockclient/listfoundationmodels(input:)) in *AWS SDK for Swift API reference*. 

------

# Actions for Amazon Bedrock using AWS SDKs
<a name="bedrock_code_examples_actions"></a>

The following code examples demonstrate how to perform individual Amazon Bedrock actions with AWS SDKs. Each example includes a link to GitHub, where you can find instructions for setting up and running the code. 

These excerpts call the Amazon Bedrock API and are code excerpts from larger programs that must be run in context. You can see actions in context in [Scenarios for Amazon Bedrock using AWS SDKs](bedrock_code_examples_scenarios.md). 

 The following examples include only the most commonly used actions. For a complete list, see the [Amazon Bedrock API Reference](https://docs.aws.amazon.com/bedrock/latest/APIReference/welcome.html). 

**Topics**
+ [`GetFoundationModel`](bedrock_example_bedrock_GetFoundationModel_section.md)
+ [`ListFoundationModels`](bedrock_example_bedrock_ListFoundationModels_section.md)

# Use `GetFoundationModel` with an AWS SDK
<a name="bedrock_example_bedrock_GetFoundationModel_section"></a>

The following code examples show how to use `GetFoundationModel`.

------
#### [ Java ]

**SDK for Java 2.x**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/bedrock#code-examples). 
Get details about a foundation model using the synchronous Amazon Bedrock client.  

```
    /**
     * Get details about an Amazon Bedrock foundation model.
     *
     * @param bedrockClient   The service client for accessing Amazon Bedrock.
     * @param modelIdentifier The model identifier.
     * @return An object containing the foundation model's details.
     */
    public static FoundationModelDetails getFoundationModel(BedrockClient bedrockClient, String modelIdentifier) {
        try {
            GetFoundationModelResponse response = bedrockClient.getFoundationModel(
                    r -> r.modelIdentifier(modelIdentifier)
            );

            FoundationModelDetails model = response.modelDetails();

            System.out.println(" Model ID:                     " + model.modelId());
            System.out.println(" Model ARN:                    " + model.modelArn());
            System.out.println(" Model Name:                   " + model.modelName());
            System.out.println(" Provider Name:                " + model.providerName());
            System.out.println(" Lifecycle status:             " + model.modelLifecycle().statusAsString());
            System.out.println(" Input modalities:             " + model.inputModalities());
            System.out.println(" Output modalities:            " + model.outputModalities());
            System.out.println(" Supported customizations:     " + model.customizationsSupported());
            System.out.println(" Supported inference types:    " + model.inferenceTypesSupported());
            System.out.println(" Response streaming supported: " + model.responseStreamingSupported());

            return model;

        } catch (ValidationException e) {
            throw new IllegalArgumentException(e.getMessage());
        } catch (SdkException e) {
            System.err.println(e.getMessage());
            throw new RuntimeException(e);
        }
    }
```
Get details about a foundation model using the asynchronous Amazon Bedrock client.  

```
    /**
     * Get details about an Amazon Bedrock foundation model.
     *
     * @param bedrockClient   The async service client for accessing Amazon Bedrock.
     * @param modelIdentifier The model identifier.
     * @return An object containing the foundation model's details.
     */
    public static FoundationModelDetails getFoundationModel(BedrockAsyncClient bedrockClient, String modelIdentifier) {
        try {
            CompletableFuture<GetFoundationModelResponse> future = bedrockClient.getFoundationModel(
                    r -> r.modelIdentifier(modelIdentifier)
            );

            FoundationModelDetails model = future.get().modelDetails();

            System.out.println(" Model ID:                     " + model.modelId());
            System.out.println(" Model ARN:                    " + model.modelArn());
            System.out.println(" Model Name:                   " + model.modelName());
            System.out.println(" Provider Name:                " + model.providerName());
            System.out.println(" Lifecycle status:             " + model.modelLifecycle().statusAsString());
            System.out.println(" Input modalities:             " + model.inputModalities());
            System.out.println(" Output modalities:            " + model.outputModalities());
            System.out.println(" Supported customizations:     " + model.customizationsSupported());
            System.out.println(" Supported inference types:    " + model.inferenceTypesSupported());
            System.out.println(" Response streaming supported: " + model.responseStreamingSupported());

            return model;

        } catch (ExecutionException e) {
            if (e.getMessage().contains("ValidationException")) {
                throw new IllegalArgumentException(e.getMessage());
            } else {
                System.err.println(e.getMessage());
                throw new RuntimeException(e);
            }
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            System.err.println(e.getMessage());
            throw new RuntimeException(e);
        }
    }
```
+  For API details, see [GetFoundationModel](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-2023-04-20/GetFoundationModel) in *AWS SDK for Java 2.x API Reference*. 

------
#### [ JavaScript ]

**SDK for JavaScript (v3)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javascriptv3/example_code/bedrock#code-examples). 
Get details about a foundation model.  

```
import { fileURLToPath } from "node:url";

import {
  BedrockClient,
  GetFoundationModelCommand,
} from "@aws-sdk/client-bedrock";

/**
 * Get details about an Amazon Bedrock foundation model.
 *
 * @return {FoundationModelDetails} - The list of available bedrock foundation models.
 */
export const getFoundationModel = async () => {
  const client = new BedrockClient();

  const command = new GetFoundationModelCommand({
    modelIdentifier: "amazon.titan-embed-text-v1",
  });

  const response = await client.send(command);

  return response.modelDetails;
};

// Invoke main function if this file was run directly.
if (process.argv[1] === fileURLToPath(import.meta.url)) {
  const model = await getFoundationModel();
  console.log(model);
}
```
+  For API details, see [GetFoundationModel](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/bedrock/command/GetFoundationModelCommand) in *AWS SDK for JavaScript API Reference*. 

------
#### [ Python ]

**SDK for Python (Boto3)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/bedrock#code-examples). 
Get details about a foundation model.  

```
    def get_foundation_model(self, model_identifier):
        """
        Get details about an Amazon Bedrock foundation model.

        :return: The foundation model's details.
        """

        try:
            return self.bedrock_client.get_foundation_model(
                modelIdentifier=model_identifier
            )["modelDetails"]
        except ClientError:
            logger.error(
                f"Couldn't get foundation models details for {model_identifier}"
            )
            raise
```
+  For API details, see [GetFoundationModel](https://docs.aws.amazon.com/goto/boto3/bedrock-2023-04-20/GetFoundationModel) in *AWS SDK for Python (Boto3) API Reference*. 

------

# Use `ListFoundationModels` with an AWS SDK
<a name="bedrock_example_bedrock_ListFoundationModels_section"></a>

The following code examples show how to use `ListFoundationModels`.

------
#### [ .NET ]

**SDK for .NET (v4)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/dotnetv4/Bedrock#code-examples). 
List the available Bedrock foundation models.  

```
    /// <summary>
    /// List foundation models.
    /// </summary>
    /// <param name="bedrockClient"> The Amazon Bedrock client. </param>
    private static async Task ListFoundationModelsAsync(AmazonBedrockClient bedrockClient)
    {
        Console.WriteLine("List foundation models with no filter.");

        try
        {
            var response = await bedrockClient.ListFoundationModelsAsync(new ListFoundationModelsRequest()
            {
            });

            if (response?.HttpStatusCode == System.Net.HttpStatusCode.OK)
            {
                foreach (var fm in response.ModelSummaries)
                {
                    WriteToConsole(fm);
                }
            }
            else
            {
                Console.WriteLine("Something wrong happened");
            }
        }
        catch (AmazonBedrockException e)
        {
            Console.WriteLine(e.Message);
        }
    }
```
+  For API details, see [ListFoundationModels](https://docs.aws.amazon.com/goto/DotNetSDKV4/bedrock-2023-04-20/ListFoundationModels) in *AWS SDK for .NET API Reference*. 

------
#### [ Go ]

**SDK for Go V2**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/gov2/bedrock#code-examples). 
List the available Bedrock foundation models.  

```
import (
	"context"
	"log"

	"github.com/aws/aws-sdk-go-v2/service/bedrock"
	"github.com/aws/aws-sdk-go-v2/service/bedrock/types"
)

// FoundationModelWrapper encapsulates Amazon Bedrock actions used in the examples.
// It contains a Bedrock service client that is used to perform foundation model actions.
type FoundationModelWrapper struct {
	BedrockClient *bedrock.Client
}



// ListPolicies lists Bedrock foundation models that you can use.
func (wrapper FoundationModelWrapper) ListFoundationModels(ctx context.Context) ([]types.FoundationModelSummary, error) {

	var models []types.FoundationModelSummary

	result, err := wrapper.BedrockClient.ListFoundationModels(ctx, &bedrock.ListFoundationModelsInput{})

	if err != nil {
		log.Printf("Couldn't list foundation models. Here's why: %v\n", err)
	} else {
		models = result.ModelSummaries
	}
	return models, err
}
```
+  For API details, see [ListFoundationModels](https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/bedrock#Client.ListFoundationModels) in *AWS SDK for Go API Reference*. 

------
#### [ Java ]

**SDK for Java 2.x**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/bedrock#code-examples). 
List the available Amazon Bedrock foundation models using the synchronous Amazon Bedrock client.  

```
    /**
     * Lists Amazon Bedrock foundation models that you can use.
     * You can filter the results with the request parameters.
     *
     * @param bedrockClient The service client for accessing Amazon Bedrock.
     * @return A list of objects containing the foundation models' details
     */
    public static List<FoundationModelSummary> listFoundationModels(BedrockClient bedrockClient) {

        try {
            ListFoundationModelsResponse response = bedrockClient.listFoundationModels(r -> {});

            List<FoundationModelSummary> models = response.modelSummaries();

            if (models.isEmpty()) {
                System.out.println("No available foundation models in " + region.toString());
            } else {
                for (FoundationModelSummary model : models) {
                    System.out.println("Model ID: " + model.modelId());
                    System.out.println("Provider: " + model.providerName());
                    System.out.println("Name:     " + model.modelName());
                    System.out.println();
                }
            }

            return models;

        } catch (SdkClientException e) {
            System.err.println(e.getMessage());
            throw new RuntimeException(e);
        }
    }
```
List the available Amazon Bedrock foundation models using the asynchronous Amazon Bedrock client.  

```
    /**
     * Lists Amazon Bedrock foundation models that you can use.
     * You can filter the results with the request parameters.
     *
     * @param bedrockClient The async service client for accessing Amazon Bedrock.
     * @return A list of objects containing the foundation models' details
     */
    public static List<FoundationModelSummary> listFoundationModels(BedrockAsyncClient bedrockClient) {
        try {
            CompletableFuture<ListFoundationModelsResponse> future = bedrockClient.listFoundationModels(r -> {});

            List<FoundationModelSummary> models = future.get().modelSummaries();

            if (models.isEmpty()) {
                System.out.println("No available foundation models in " + region.toString());
            } else {
                for (FoundationModelSummary model : models) {
                    System.out.println("Model ID: " + model.modelId());
                    System.out.println("Provider: " + model.providerName());
                    System.out.println("Name:     " + model.modelName());
                    System.out.println();
                }
            }

            return models;

        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            System.err.println(e.getMessage());
            throw new RuntimeException(e);
        } catch (ExecutionException e) {
            System.err.println(e.getMessage());
            throw new RuntimeException(e);
        }
    }
```
+  For API details, see [ListFoundationModels](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-2023-04-20/ListFoundationModels) in *AWS SDK for Java 2.x API Reference*. 

------
#### [ JavaScript ]

**SDK for JavaScript (v3)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javascriptv3/example_code/bedrock#code-examples). 
List the available foundation models.  

```
import { fileURLToPath } from "node:url";

import {
  BedrockClient,
  ListFoundationModelsCommand,
} from "@aws-sdk/client-bedrock";

/**
 * List the available Amazon Bedrock foundation models.
 *
 * @return {FoundationModelSummary[]} - The list of available bedrock foundation models.
 */
export const listFoundationModels = async () => {
  const client = new BedrockClient();

  const input = {
    // byProvider: 'STRING_VALUE',
    // byCustomizationType: 'FINE_TUNING' || 'CONTINUED_PRE_TRAINING',
    // byOutputModality: 'TEXT' || 'IMAGE' || 'EMBEDDING',
    // byInferenceType: 'ON_DEMAND' || 'PROVISIONED',
  };

  const command = new ListFoundationModelsCommand(input);

  const response = await client.send(command);

  return response.modelSummaries;
};

// Invoke main function if this file was run directly.
if (process.argv[1] === fileURLToPath(import.meta.url)) {
  const models = await listFoundationModels();
  console.log(models);
}
```
+  For API details, see [ListFoundationModels](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/bedrock/command/ListFoundationModelsCommand) in *AWS SDK for JavaScript API Reference*. 

------
#### [ Kotlin ]

**SDK for Kotlin**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/kotlin/services/bedrock#code-examples). 
List the available Amazon Bedrock foundation models.  

```
suspend fun listFoundationModels(): List<FoundationModelSummary>? {
    BedrockClient.fromEnvironment { region = "us-east-1" }.use { bedrockClient ->
        val response = bedrockClient.listFoundationModels(ListFoundationModelsRequest {})
        response.modelSummaries?.forEach { model ->
            println("==========================================")
            println(" Model ID: ${model.modelId}")
            println("------------------------------------------")
            println(" Name: ${model.modelName}")
            println(" Provider: ${model.providerName}")
            println(" Input modalities: ${model.inputModalities}")
            println(" Output modalities: ${model.outputModalities}")
            println(" Supported customizations: ${model.customizationsSupported}")
            println(" Supported inference types: ${model.inferenceTypesSupported}")
            println("------------------------------------------\n")
        }
        return response.modelSummaries
    }
}
```
+  For API details, see [ListFoundationModels](https://sdk.amazonaws.com/kotlin/api/latest/index.html) in *AWS SDK for Kotlin API reference*. 

------
#### [ PHP ]

**SDK for PHP**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/php/example_code/bedrock#code-examples). 
List the available Amazon Bedrock foundation models.  

```
    public function listFoundationModels()
    {
        $bedrockClient = new BedrockClient([
            'region' => 'us-west-2',
            'profile' => 'default'
        ]);
        $response = $bedrockClient->listFoundationModels();
        return $response['modelSummaries'];
    }
```
+  For API details, see [ListFoundationModels](https://docs.aws.amazon.com/goto/SdkForPHPV3/bedrock-2023-04-20/ListFoundationModels) in *AWS SDK for PHP API Reference*. 

------
#### [ Python ]

**SDK for Python (Boto3)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/bedrock#code-examples). 
List the available Amazon Bedrock foundation models.  

```
    def list_foundation_models(self):
        """
        List the available Amazon Bedrock foundation models.

        :return: The list of available bedrock foundation models.
        """

        try:
            response = self.bedrock_client.list_foundation_models()
            models = response["modelSummaries"]
            logger.info("Got %s foundation models.", len(models))
            return models

        except ClientError:
            logger.error("Couldn't list foundation models.")
            raise
```
+  For API details, see [ListFoundationModels](https://docs.aws.amazon.com/goto/boto3/bedrock-2023-04-20/ListFoundationModels) in *AWS SDK for Python (Boto3) API Reference*. 

------
#### [ Swift ]

**SDK for Swift**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/swift/example_code/bedrock#code-examples). 

```
import AWSBedrock

        // Always use the Region "us-east-1" to have access to the most models.
        let config = try await BedrockClient.BedrockClientConfiguration(region: "us-east-1")
        let bedrockClient = BedrockClient(config: config)

        let output = try await bedrockClient.listFoundationModels(
            input: ListFoundationModelsInput()
        )

        guard let summaries = output.modelSummaries else {
            print("No models returned.")
            return
        }
        
        // Output a list of the models with their details.
        for summary in summaries {
            print("==========================================")
            print(" Model ID: \(summary.modelId ?? "<unknown>")")
            print("------------------------------------------")
            print(" Name: \(summary.modelName ?? "<unknown>")")
            print(" Provider: \(summary.providerName ?? "<unknown>")")
            print(" Input modalities: \(buildModalityList(modalities: summary.inputModalities))")
            print(" Output modalities: \(buildModalityList(modalities: summary.outputModalities))")
            print(" Supported customizations: \(buildCustomizationList(customizations: summary.customizationsSupported ))")
            print(" Supported inference types: \(buildInferenceList(inferences: summary.inferenceTypesSupported))")
            print("------------------------------------------\n")
        }
```
+  For API details, see [ListFoundationModels](https://sdk.amazonaws.com/swift/api/awsbedrock/latest/documentation/awsbedrock/bedrockclient/listfoundationmodels(input:)) in *AWS SDK for Swift API reference*. 

------

# Scenarios for Amazon Bedrock using AWS SDKs
<a name="bedrock_code_examples_scenarios"></a>

The following code examples show you how to implement common scenarios in Amazon Bedrock with AWS SDKs. These scenarios show you how to accomplish specific tasks by calling multiple functions within Amazon Bedrock or combined with other AWS services. Each scenario includes a link to the complete source code, where you can find instructions on how to set up and run the code. 

Scenarios target an intermediate level of experience to help you understand service actions in context.

**Topics**
+ [Orchestrate generative AI applications with Step Functions](bedrock_example_cross_ServerlessPromptChaining_section.md)

# Build and orchestrate generative AI applications with Amazon Bedrock and Step Functions
<a name="bedrock_example_cross_ServerlessPromptChaining_section"></a>

The following code example shows how to build and orchestrate generative AI applications with Amazon Bedrock and Step Functions.

------
#### [ Python ]

**SDK for Python (Boto3)**  
 The Amazon Bedrock Serverless Prompt Chaining scenario demonstrates how [AWS Step Functions](https://docs.aws.amazon.com/step-functions/latest/dg/welcome.html), [Amazon Bedrock](https://docs.aws.amazon.com/bedrock/latest/userguide/what-is-bedrock.html), and [https://docs.aws.amazon.com/bedrock/latest/userguide/agents.html](https://docs.aws.amazon.com/bedrock/latest/userguide/agents.html) can be used to build and orchestrate complex, serverless, and highly scalable generative AI applications. It contains the following working examples:   
+  Write an analysis of a given novel for a literature blog. This example illustrates a simple, sequential chain of prompts. 
+  Generate a short story about a given topic. This example illustrates how the AI can iteratively process a list of items that it previously generated. 
+  Create an itinerary for a weekend vacation to a given destination. This example illustrates how to parallelize multiple distinct prompts. 
+  Pitch movie ideas to a human user acting as a movie producer. This example illustrates how to parallelize the same prompt with different inference parameters, how to backtrack to a previous step in the chain, and how to include human input as part of the workflow. 
+  Plan a meal based on ingredients the user has at hand. This example illustrates how prompt chains can incorporate two distinct AI conversations, with two AI personas engaging in a debate with each other to improve the final outcome. 
+  Find and summarize today's highest trending GitHub repository. This example illustrates chaining multiple AI agents that interact with external APIs. 
 For complete source code and instructions to set up and run, see the full project on [GitHub](https://github.com/aws-samples/amazon-bedrock-serverless-prompt-chaining).   

**Services used in this example**
+ Amazon Bedrock
+ Amazon Bedrock Runtime
+ Amazon Bedrock Agents
+ Amazon Bedrock Agents Runtime
+ Step Functions

------