AWS X-Ray

In-memory trace store. Accepts segment documents from the AWS X-Ray daemon (or any client using the SDK), aggregates them per-trace, and serves the standard listing/aggregation operations the AWS console hits.

Endpoint: http://localhost:4566Signing name: xrayProtocol: REST-JSON

Operations

Operation	Method / Path
PutTraceSegments	POST /TraceSegments
BatchGetTraces	POST /Traces
GetTraceSummaries	POST /TraceSummaries
GetServiceGraph	POST /ServiceGraph
GetSamplingRules / CreateSamplingRule / DeleteSamplingRule	POST /GetSamplingRules etc.
GetSamplingTargets	POST /SamplingTargets
CreateGroup / DeleteGroup / GetGroups	POST /CreateGroup etc.

Behavior notes

• PutTraceSegments parses each TraceSegmentDocuments entry, appends it to the trace identified by trace_id, and updates the trace's start/end/duration plus error/fault/throttle flags.
• Bad segments come back in UnprocessedTraceSegments with an ErrorCode and Message.
• GetServiceGraph aggregates per-name over all stored traces. Each unique service name becomes a node; edges are not currently inferred.
• GetSamplingTargets echoes whatever statistics the client sent so the local reservoir keeps working.