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Changelog

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API Versioning

• Patch releases: Bug fixes, no breaking changes
• Minor releases: New features, backwards compatible
• Major releases: Breaking changes (new version path)

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v1.5.0 Latest

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New Features

• AI Agent Function Calling: AI agents can now call external functions/tools
  • Define tools in session creation
  • Receive ai_agent.tool_called webhook events
  • Submit tool results via submitToolResult endpoint
• Knowledge Base API: Create and manage knowledge bases for AI agents
  • Upload documents (PDF, TXT, URL)
  • Semantic search across documents
  • Automatic context injection
• Enhanced Analysis: New analysis types
  • compliance - Script adherence checking
  • topics - Topic and keyword extraction

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Improvements

• Reduced transcription latency by 40%
• Added metadata field to all webhook events
• Improved language detection accuracy for Swiss German

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Deprecations

• analysis_type parameter deprecated in favor of analyses array

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v1.4.0

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New Features

• SIP Integration: Direct SIP trunk connectivity
  • TLS and SRTP support
  • Multiple codec support (Opus, G.722, G.711)
  • SIP REFER for transfers
• Dual-Channel Recording: Separate audio tracks per speaker
  • New recording.channels parameter
  • Download individual channels or mixed

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Improvements

• Added idempotency_key support for POST requests
• New session.provider.connected webhook event
• Support for Australian English (en-AU) voice

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Bug Fixes

• Fixed transcript word count including punctuation
• Fixed rare race condition in session end handling

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v1.3.0

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New Features

• AI Agent Mode: Automated voice agents with natural language understanding
  • Custom system prompts
  • Multiple voice options
  • Escalation to human agents
• Webhook Signatures: HMAC-SHA256 signed webhook payloads
  • New Kallglot-Signature header
  • Timestamp validation

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Improvements

• Added Portuguese (pt) language support
• New help_chat_voice session mode
• Improved sentiment analysis accuracy

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v1.2.0

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New Features

• Call Analysis API: AI-powered conversation analysis
  • Sentiment analysis
  • Automatic summarization
  • Action item extraction
  • Quality scoring
• Telnyx Integration: Support for Telnyx telephony provider
  • TeXML compatibility
  • Call Control API support

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Improvements

• Added transcript export formats (SRT, VTT)
• New regional variants for French (fr-CA, fr-CH)
• Reduced WebSocket connection latency

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v1.1.0

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New Features

• WebSocket Streaming: Real-time bidirectional audio streaming
  • Low-latency audio processing
  • Interim transcript results
  • Audio output streaming
• Recording Downloads: Download recordings in multiple formats
  • MP3, WAV, OGG support
  • Sample rate conversion

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Improvements

• Added Dutch (nl) and Polish (pl) languages
• Improved German transcription accuracy
• New session.started webhook event

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v1.0.0

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Initial Release

• Session Management: Create, retrieve, and end sessions
• Twilio Integration: Connect phone calls via Twilio
• Bidirectional Translation: Real-time speech-to-speech translation
• Transcription: Automatic speech recognition
• Recording: Session audio recording
• Webhooks: Event notifications

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Migration Guides

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Migrating from Beta to v1.0

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Upgrading to v1.5

// Before (deprecated)
await requestKallglotAnalysis(sessionId, {
  analysis_type: 'sentiment'
});

// After
await requestKallglotAnalysis(sessionId, {
  analyses: ['sentiment']
});

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Upcoming Changes

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Planned for v1.6

• Video call support (WebRTC)
• Real-time captioning API
• Custom voice cloning
• Extended language support

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Deprecation Timeline

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Subscribe to Updates

• Email: Create your developer account at kallglot.com, then subscribe in the Developer Portal
• RSS: changelog.kallglot.com/rss
• Twitter: @KallglotDev