April 2026

v1.4.0 — Anthropic API Compatibility & Audio Translation

• Anthropic Messages API — New POST /v1/messages endpoint. Use the Anthropic SDK with CallMissed by changing only the base_url. Full streaming support with Anthropic SSE lifecycle (message_start, content_block_delta, message_stop).
• Dual auth headers — Anthropic endpoint accepts both x-api-key and Authorization: Bearer headers
• Model aliasing — Send claude-sonnet-4.6 on the Anthropic endpoint and it auto-routes to anthropic/claude-sonnet-4.6 in the frontier catalog
• Audio Translation — New POST /v1/audio/translations endpoint. Translate audio in 24 languages to English text. OpenAI SDK compatible (client.audio.translations.create())
• Token counting — POST /v1/messages/count_tokens for input token estimation
• Anthropic rate limit headers — anthropic-ratelimit-requests-limit, anthropic-ratelimit-requests-remaining, etc.

v1.3.0 — Voice Agent & Ultra-Low-Latency Pipeline

• Voice Agent WebSocket — Real-time STT→LLM→TTS pipeline over /ws/voice-agent. PCM audio in, streaming MP3 out. LLM and TTS run concurrently for minimum latency.
• PCM AudioWorklet capture — Raw PCM s16le at 16kHz, no container overhead
• Streaming MP3 playback — MediaSource API appends and plays chunks as they arrive
• Profile management — Save and update user profile from the dashboard

v1.2.0 — Security, Google OAuth & Plan Enforcement

• Google OAuth — Sign in with Google via POST /api/v1/auth/google. Auto-creates tenant/user, links to existing accounts by email.
• OTP Authentication — Email-based OTP for passwordless login and password reset
• Plan limit enforcement — Server-side usage caps per plan tier (free/starter/pro/enterprise). API returns 429 quota_exceeded when limits reached. Usage headers (X-RateLimit-*, X-Usage-Warning) on every response.
• Per-API-key rate limiting — 60 req/min per key on top of IP-based limits
• Security hardening — SSRF prevention on webhooks, WebSocket auth enforcement, input sanitization, rate limiter IP cleanup, error message sanitization
• Model catalog update — OpenAI gpt-5.4 family, Anthropic Claude 4.6, Google Gemini 3.1, xAI Grok 4.20, Qwen 3.5, Mistral Small
• Knowledge Base file upload — Upload PDF, DOCX, TXT files (max 20 MB) with auto text extraction
• Bot deployment verification — Verify WhatsApp/Twilio channel connectivity from the dashboard
• Settings verification — Verify WhatsApp, Twilio, and Indic LLM API connectivity
• Contact form — Public POST /api/v1/contact endpoint with email notifications
• Dual-domain support — .com and .in TLDs for all apps

v1.1.0 — Platform Playground & SEO

• Playground rebuild — LLM (streaming + non-streaming), STT (file upload + mic), TTS (24 Indic voices), Voice Agent demo
• Call Analytics API — Upload audio files for batch STT with diarization and LLM-powered analysis
• SEO pages — 6 product pages, legal pages, company pages on the landing site
• Sitemaps — All 4 apps have sitemap.ts for SEO

v1.0.0 — Initial Release

• Chat Completion API — OpenAI-compatible endpoint with streaming, tool calls, and function calling
• Speech to Text — saaras:v3 with 22 Indic language support
• Text to Speech — bulbul:v3 (39 voices across 11 Indian languages)
• WhatsApp Bot — Full WhatsApp Business API integration
• Voice Calling — Twilio-based inbound voice with WebSocket streaming
• Multi-tenant — Complete tenant isolation with role-based access
• API Keys — Scoped API keys with usage tracking
• Webhook Delivery — Outbound webhooks with retry and HMAC signing
• Analytics Dashboard — Real-time conversation and usage analytics
• 300+ LLM Models — Access frontier models from OpenAI, Anthropic, Google, xAI, Qwen, and more