PutTraceSegments - AWS X-Ray


Uploads segment documents to AWS X-Ray. A segment document can be a completed segment, an in-progress segment, or an array of subsegments.

Segments must include the following fields. For the full segment document schema, see AWS X-Ray Segment Documents in the AWS X-Ray Developer Guide.

Required segment document fields
  • name - The name of the service that handled the request.

  • id - A 64-bit identifier for the segment, unique among segments in the same trace, in 16 hexadecimal digits.

  • trace_id - A unique identifier that connects all segments and subsegments originating from a single client request.

  • start_time - Time the segment or subsegment was created, in floating point seconds in epoch time, accurate to milliseconds. For example, 1480615200.010 or 1.480615200010E9.

  • end_time - Time the segment or subsegment was closed. For example, 1480615200.090 or 1.480615200090E9. Specify either an end_time or in_progress.

  • in_progress - Set to true instead of specifying an end_time to record that a segment has been started, but is not complete. Send an in-progress segment when your application receives a request that will take a long time to serve, to trace that the request was received. When the response is sent, send the complete segment to overwrite the in-progress segment.

A trace_id consists of three numbers separated by hyphens. For example, 1-58406520-a006649127e371903a2de979. For trace IDs created by an X-Ray SDK, or by AWS services integrated with X-Ray, a trace ID includes:

Trace ID Format
  • The version number, for instance, 1.

  • The time of the original request, in Unix epoch time, in 8 hexadecimal digits. For example, 10:00AM December 2nd, 2016 PST in epoch time is 1480615200 seconds, or 58406520 in hexadecimal.

  • A 96-bit identifier for the trace, globally unique, in 24 hexadecimal digits.


Trace IDs created via OpenTelemetry have a different format based on the W3C Trace Context specification. A W3C trace ID must be formatted in the X-Ray trace ID format when sending to X-Ray. For example, a W3C trace ID 4efaaf4d1e8720b39541901950019ee5 should be formatted as 1-4efaaf4d-1e8720b39541901950019ee5 when sending to X-Ray. While X-Ray trace IDs include the original request timestamp in Unix epoch time, this is not required or validated.

Request Syntax

POST /TraceSegments HTTP/1.1 Content-type: application/json { "TraceSegmentDocuments": [ "string" ] }

URI Request Parameters

The request does not use any URI parameters.

Request Body

The request accepts the following data in JSON format.


A string containing a JSON document defining one or more segments or subsegments.

Type: Array of strings

Required: Yes

Response Syntax

HTTP/1.1 200 Content-type: application/json { "UnprocessedTraceSegments": [ { "ErrorCode": "string", "Id": "string", "Message": "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.


Segments that failed processing.

Type: Array of UnprocessedTraceSegment objects


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


The request is missing required parameters or has invalid parameters.

HTTP Status Code: 400


The request exceeds the maximum number of requests per second.

HTTP Status Code: 429

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: