For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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DocumentationAPI ReferenceMCPSDKsCLI (new)What's New?
DocumentationAPI ReferenceMCPSDKsCLI (new)What's New?
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What's New?

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August 9, 2025
August 9, 2025
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August 8, 2025

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New: Call Metrics & Artifact Improvements

You can now access detailed call performance metrics and structured output IDs directly from your call artifacts.

Turn Latencies
Each conversation turn’s latency
Call.artifact.performanceMetrics.turnLatencies
Model Latency (avg)
Average time for the model to generate a response
Call.artifact.performanceMetrics.modelLatencyAverage
Voice Latency (avg)
Average time to synthesize voice
Call.artifact.performanceMetrics.voiceLatencyAverage
Transcriber Latency (avg)
Average time to transcribe voice
Call.artifact.performanceMetrics.transcriberLatencyAverage
Endpointing Latency (avg)
Time to detect end of a conversation turn
Call.artifact.performanceMetrics.endpointingLatencyAverage
Turn Latency (avg)
Average latency to complete a conversation turn
Call.artifact.performanceMetrics.turnLatencyAverage
Structured Output IDs & Results
Track and extract structured outputs from your calls

  • During call: Access array of output IDs
    Call.artifactPlan.structuredOutputIds

  • After call: Extracted outputs are stored here
    Call.artifact.structuredOutputs

These improvements help you monitor, debug, and analyze your calls with greater detail.