# ListSpans
Retrieves AI agent execution traces for a session, providing granular visibility into agent orchestration flows, LLM interactions, and tool invocations.
## Request Syntax
```
GET /assistants/assistantId/sessions/sessionId/spans?maxResults=maxResults&nextToken=nextToken HTTP/1.1
```
## URI Request Parameters
The request uses the following URI parameters.
** [assistantId](#API_amazon-q-connect_ListSpans_RequestSyntax) **
UUID or ARN of the Connect AI Assistant resource
Pattern: `[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$|^arn:[a-z-]*?:wisdom:[a-z0-9-]*?:[0-9]{12}:[a-z-]*?/[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}(?:/[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}){0,2}`
Required: Yes
** [maxResults](#API_amazon-q-connect_ListSpans_RequestSyntax) **
Maximum number of spans to return per page
Valid Range: Minimum value of 1. Maximum value of 100.
** [nextToken](#API_amazon-q-connect_ListSpans_RequestSyntax) **
Pagination token for retrieving the next page of results
Length Constraints: Minimum length of 1. Maximum length of 2048.
** [sessionId](#API_amazon-q-connect_ListSpans_RequestSyntax) **
UUID or ARN of the Connect AI Session resource
Pattern: `[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}$|^arn:[a-z-]*?:wisdom:[a-z0-9-]*?:[0-9]{12}:[a-z-]*?/[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}(?:/[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}){0,2}`
Required: Yes
## Request Body
The request does not have a request body.
## Response Syntax
```
HTTP/1.1 200
Content-type: application/json
{
"nextToken": "string",
"spans": [
{
"assistantId": "string",
"attributes": {
"agentId": "string",
"aiAgentArn": "string",
"aiAgentId": "string",
"aiAgentInvoker": "string",
"aiAgentName": "string",
"aiAgentOrchestratorUseCase": "string",
"aiAgentType": "string",
"aiAgentVersion": number,
"cacheReadInputTokens": number,
"cacheWriteInputTokens": number,
"contactId": "string",
"errorType": "string",
"initialContactId": "string",
"inputMessages": [
{
"messageId": "string",
"participant": "string",
"timestamp": number,
"values": [
{ ... }
]
}
],
"instanceArn": "string",
"operationName": "string",
"outputMessages": [
{
"messageId": "string",
"participant": "string",
"timestamp": number,
"values": [
{ ... }
]
}
],
"promptArn": "string",
"promptId": "string",
"promptName": "string",
"promptType": "string",
"promptVersion": number,
"providerName": "string",
"requestMaxTokens": number,
"requestModel": "string",
"responseFinishReasons": [ "string" ],
"responseModel": "string",
"sessionName": "string",
"systemInstructions": [
{ ... }
],
"temperature": number,
"topP": number,
"usageInputTokens": number,
"usageOutputTokens": number,
"usageTotalTokens": number
},
"endTimestamp": number,
"parentSpanId": "string",
"requestId": "string",
"sessionId": "string",
"spanId": "string",
"spanName": "string",
"spanType": "string",
"startTimestamp": number,
"status": "string"
}
]
}
```
## 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.
** [nextToken](#API_amazon-q-connect_ListSpans_ResponseSyntax) **
Pagination token for retrieving additional results
Type: String
Length Constraints: Minimum length of 1. Maximum length of 2048.
** [spans](#API_amazon-q-connect_ListSpans_ResponseSyntax) **
Array of span objects for the session
Type: Array of [Span](API_amazon-q-connect_Span.md) objects
Array Members: Minimum number of 0 items. Maximum number of 100 items.
## Errors
For information about the errors that are common to all actions, see [Common Errors](CommonErrors.md).
** AccessDeniedException **
You do not have sufficient access to perform this action.
HTTP Status Code: 403
** ResourceNotFoundException **
The specified resource does not exist.
** resourceName **
The specified resource name.
HTTP Status Code: 404
** ValidationException **
The input fails to satisfy the constraints specified by a service.
HTTP Status Code: 400
## See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following:
+ [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/qconnect-2020-10-19/ListSpans)
+ [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/qconnect-2020-10-19/ListSpans)
+ [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/qconnect-2020-10-19/ListSpans)
+ [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/qconnect-2020-10-19/ListSpans)
+ [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/qconnect-2020-10-19/ListSpans)
+ [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/qconnect-2020-10-19/ListSpans)
+ [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/qconnect-2020-10-19/ListSpans)
+ [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/qconnect-2020-10-19/ListSpans)
+ [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/qconnect-2020-10-19/ListSpans)
+ [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/qconnect-2020-10-19/ListSpans)