Request Syntax URI Request Parameters Request Body Response Syntax Response Elements Errors Examples See Also

Converse

Sends messages to the specified Amazon Bedrock model. Converse provides a consistent interface that works with all models that support messages. This allows you to write code once and use it with different models. If a model has unique inference parameters, you can also pass those unique parameters to the model.

Amazon Bedrock doesn't store any text, images, or documents that you provide as content. The data is only used to generate the response.

For information about the Converse API, see Use the Converse API. To use a guardrail, see Use a guardrail with the Converse API. To use a tool with a model, see Tool use (Function calling).

For example code, see Converse API examples.

This operation requires permission for the bedrock:InvokeModel action.

Request Syntax


POST /model/modelId/converse HTTP/1.1
Content-type: application/json

{
   "additionalModelRequestFields": JSON value,
   "additionalModelResponseFieldPaths": [ "string" ],
   "guardrailConfig": { 
      "guardrailIdentifier": "string",
      "guardrailVersion": "string",
      "trace": "string"
   },
   "inferenceConfig": { 
      "maxTokens": number,
      "stopSequences": [ "string" ],
      "temperature": number,
      "topP": number
   },
   "messages": [ 
      { 
         "content": [ 
            { ... }
         ],
         "role": "string"
      }
   ],
   "system": [ 
      { ... }
   ],
   "toolConfig": { 
      "toolChoice": { ... },
      "tools": [ 
         { ... }
      ]
   }
}

URI Request Parameters

The request uses the following URI parameters.

modelId

The identifier for the model that you want to call.

The modelId to provide depends on the type of model or throughput that you use:

If you use a base model, specify the model ID or its ARN. For a list of model IDs for base models, see Amazon Bedrock base model IDs (on-demand throughput) in the Amazon Bedrock User Guide.
If you use an inference profile, specify the inference profile ID or its ARN. For a list of inference profile IDs, see Supported Regions and models for cross-region inference in the Amazon Bedrock User Guide.
If you use a provisioned model, specify the ARN of the Provisioned Throughput. For more information, see Run inference using a Provisioned Throughput in the Amazon Bedrock User Guide.
If you use a custom model, first purchase Provisioned Throughput for it. Then specify the ARN of the resulting provisioned model. For more information, see Use a custom model in Amazon Bedrock in the Amazon Bedrock User Guide.

The Converse API doesn't support imported models.

Length Constraints: Minimum length of 1. Maximum length of 2048.

Pattern: ^(arn:aws(-[^:]+)?:bedrock:[a-z0-9-]{1,20}:(([0-9]{12}:custom-model/[a-z0-9-]{1,63}[.]{1}[a-z0-9-]{1,63}/[a-z0-9]{12})|(:foundation-model/[a-z0-9-]{1,63}[.]{1}[a-z0-9-]{1,63}([.:]?[a-z0-9-]{1,63}))|([0-9]{12}:provisioned-model/[a-z0-9]{12})|([0-9]{12}:inference-profile/[a-zA-Z0-9-:.]+)))|([a-z0-9-]{1,63}[.]{1}[a-z0-9-]{1,63}([.:]?[a-z0-9-]{1,63}))|(([0-9a-zA-Z][_-]?)+)|([a-zA-Z0-9-:.]+)$

Required: Yes

Request Body

The request accepts the following data in JSON format.

additionalModelRequestFields

Additional inference parameters that the model supports, beyond the base set of inference parameters that Converse supports in the inferenceConfig field. For more information, see Model parameters.

Type: JSON value

Required: No

additionalModelResponseFieldPaths

Additional model parameters field paths to return in the response. Converse returns the requested fields as a JSON Pointer object in the additionalModelResponseFields field. The following is example JSON for additionalModelResponseFieldPaths.

[ "/stop_sequence" ]

For information about the JSON Pointer syntax, see the Internet Engineering Task Force (IETF) documentation.

Converse rejects an empty JSON Pointer or incorrectly structured JSON Pointer with a 400 error code. if the JSON Pointer is valid, but the requested field is not in the model response, it is ignored by Converse.

Type: Array of strings

Array Members: Minimum number of 0 items. Maximum number of 10 items.

Length Constraints: Minimum length of 1. Maximum length of 256.

Required: No

guardrailConfig

Configuration information for a guardrail that you want to use in the request.

Type: GuardrailConfiguration object

Required: No

inferenceConfig

Inference parameters to pass to the model. Converse supports a base set of inference parameters. If you need to pass additional parameters that the model supports, use the additionalModelRequestFields request field.

Type: InferenceConfiguration object

Required: No

messages

The messages that you want to send to the model.

Type: Array of Message objects

Required: Yes

system

A system prompt to pass to the model.

Type: Array of SystemContentBlock objects

Required: No

toolConfig

Configuration information for the tools that the model can use when generating a response.

For information about models that support tool use, see Supported models and model features.

Type: ToolConfiguration object

Required: No

Response Syntax


HTTP/1.1 200
Content-type: application/json

{
   "additionalModelResponseFields": JSON value,
   "metrics": { 
      "latencyMs": number
   },
   "output": { ... },
   "stopReason": "string",
   "trace": { 
      "guardrail": { 
         "inputAssessment": { 
            "string" : { 
               "contentPolicy": { 
                  "filters": [ 
                     { 
                        "action": "string",
                        "confidence": "string",
                        "type": "string"
                     }
                  ]
               },
               "contextualGroundingPolicy": { 
                  "filters": [ 
                     { 
                        "action": "string",
                        "score": number,
                        "threshold": number,
                        "type": "string"
                     }
                  ]
               },
               "sensitiveInformationPolicy": { 
                  "piiEntities": [ 
                     { 
                        "action": "string",
                        "match": "string",
                        "type": "string"
                     }
                  ],
                  "regexes": [ 
                     { 
                        "action": "string",
                        "match": "string",
                        "name": "string",
                        "regex": "string"
                     }
                  ]
               },
               "topicPolicy": { 
                  "topics": [ 
                     { 
                        "action": "string",
                        "name": "string",
                        "type": "string"
                     }
                  ]
               },
               "wordPolicy": { 
                  "customWords": [ 
                     { 
                        "action": "string",
                        "match": "string"
                     }
                  ],
                  "managedWordLists": [ 
                     { 
                        "action": "string",
                        "match": "string",
                        "type": "string"
                     }
                  ]
               }
            }
         },
         "modelOutput": [ "string" ],
         "outputAssessments": { 
            "string" : [ 
               { 
                  "contentPolicy": { 
                     "filters": [ 
                        { 
                           "action": "string",
                           "confidence": "string",
                           "type": "string"
                        }
                     ]
                  },
                  "contextualGroundingPolicy": { 
                     "filters": [ 
                        { 
                           "action": "string",
                           "score": number,
                           "threshold": number,
                           "type": "string"
                        }
                     ]
                  },
                  "sensitiveInformationPolicy": { 
                     "piiEntities": [ 
                        { 
                           "action": "string",
                           "match": "string",
                           "type": "string"
                        }
                     ],
                     "regexes": [ 
                        { 
                           "action": "string",
                           "match": "string",
                           "name": "string",
                           "regex": "string"
                        }
                     ]
                  },
                  "topicPolicy": { 
                     "topics": [ 
                        { 
                           "action": "string",
                           "name": "string",
                           "type": "string"
                        }
                     ]
                  },
                  "wordPolicy": { 
                     "customWords": [ 
                        { 
                           "action": "string",
                           "match": "string"
                        }
                     ],
                     "managedWordLists": [ 
                        { 
                           "action": "string",
                           "match": "string",
                           "type": "string"
                        }
                     ]
                  }
               }
            ]
         }
      }
   },
   "usage": { 
      "inputTokens": number,
      "outputTokens": number,
      "totalTokens": number
   }
}

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

additionalModelResponseFields

Additional fields in the response that are unique to the model.

Type: JSON value

metrics

Metrics for the call to Converse.

Type: ConverseMetrics object

output

The result from the call to Converse.

Type: ConverseOutput object

Note: This object is a Union. Only one member of this object can be specified or returned.

stopReason

The reason why the model stopped generating output.

Type: String

trace

A trace object that contains information about the Guardrail behavior.

Type: ConverseTrace object

usage

The total number of tokens used in the call to Converse. The total includes the tokens input to the model and the tokens generated by the model.

Type: TokenUsage object

Errors

For information about the errors that are common to all actions, see Common Errors.

AccessDeniedException

The request is denied because of missing access permissions.

HTTP Status Code: 403

InternalServerException

An internal server error occurred. Retry your request.

HTTP Status Code: 500

ModelErrorException

The request failed due to an error while processing the model.

HTTP Status Code: 424

ModelNotReadyException

The model specified in the request is not ready to serve inference requests. The AWS SDK will automatically retry the operation up to 5 times. For information about configuring automatic retries, see Retry behavior in the AWS SDKs and Tools reference guide.

HTTP Status Code: 429

ModelTimeoutException

The request took too long to process. Processing time exceeded the model timeout length.

HTTP Status Code: 408

ResourceNotFoundException

The specified resource ARN was not found. Check the ARN and try your request again.

HTTP Status Code: 404

ServiceUnavailableException

The service isn't currently available. Try again later.

HTTP Status Code: 503

ThrottlingException

Your request was throttled because of service-wide limitations. Resubmit your request later or in a different region. You can also purchase Provisioned Throughput to increase the rate or number of tokens you can process.

HTTP Status Code: 429

ValidationException

Input validation failed. Check your request parameters and retry the request.

HTTP Status Code: 400

Examples

Send a message to a model

Send a messsage to Anthropic Claude Sonnet with Converse.

Sample Request


POST /model/anthropic.claude-3-sonnet-20240229-v1:0/converse HTTP/1.1
Content-type: application/json

{
    "messages": [
        {
            "role": "user",
            "content": [
                {
                    "text": "Write an article about impact of high inflation to GDP of a country"
                }
            ]
        }
    ],
    "system": [{"text" : "You are an economist with access to lots of data"}],
    "inferenceConfig": {
        "maxTokens": 1000,
        "temperature": 0.5
    }
}

Example response

Response for the above request.

Sample Request


HTTP/1.1 200
Content-type: application/json

{
    "output": {
        "message": {
            "content": [
                {
                    "text": "<text generated by the model>"
                }
            ],
            "role": "assistant"
        }
    },
    "stopReason": "end_turn",
    "usage": {
        "inputTokens": 30,
        "outputTokens": 628,
        "totalTokens": 658
    },
    "metrics": {
        "latencyMs": 1275
    }
}

Send a message with additional model fields

In the following example, the request passess a field (top_k) that the Converse field doesn't support. You pass the additional field in the additionalModelRequestFields field. The example also shows how to set the paths for the additional fields sent in the response from the model.

Sample Request


POST /model/anthropic.claude-3-sonnet-20240229-v1:0/converse HTTP/1.1
Content-type: application/json

{
    "messages": [
        {
            "role": "user",
            "content": [
                {
                    "text": "Provide general steps to debug a BSOD on a Windows laptop."
                }
            ]
        }
    ],
    "system": [{"text" : "You are a tech support expert who helps resolve technical issues. Signal 'SUCCESS' if you can resolve the issue, otherwise 'FAILURE'"}],
    "inferenceConfig": {
        "stopSequences": [ "SUCCESS", "FAILURE" ]
    },
    "additionalModelRequestFields": {
        "top_k": 200
    },
    "additionalModelResponseFieldPaths": [
        "/stop_sequence"
    ]
}

Example response

Response for the above example.

Sample Request


HTTP/1.1 200
Content-type: application/json

{
    "output": {
        "message": {
            "content": [
                {
                    "text": "<text generated by the model>"
                }
            ],
            "role": "assistant"
        }
    },
    "additionalModelResponseFields": {
        "stop_sequence": "SUCCESS"
    },
    "stopReason": "stop_sequence",
    "usage": {
        "inputTokens": 51,
        "outputTokens": 442,
        "totalTokens": 493
    },
    "metrics": {
        "latencyMs": 7944
    }
}

Use an inference profile in a conversation

The following request calls the US Anthropic Claude 3.5 Sonnet inference profile to route traffic to the us-east-1 and us-west-2 regions.

Sample Request


POST /model/us.anthropic.claude-3-5-sonnet-20240620-v1:0/converse HTTP/1.1

{
    "messages": [
        {
            "role": "user",
            "content": [
                {
                    "text": "Hello world"
                }
            ]
        }
    ]
}