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Workflow APIs for multi-step outreach sequences (beta)

Workflows can now be built and run entirely through the API, launching in beta. A workflow is a versioned graph of nodes — agent calls, WhatsApp messages, API requests, waits, retries and endings — connected by conditions, so each contact can be called, retried on no-answer, scored from extracted fields and followed up on other channels in one sequence.The new endpoints cover the full lifecycle: authoring and publishing definitions, running single contacts, batch campaigns with CSV/JSON contact uploads, and per-contact execution tracking with node-by-node history.Workflows introduction
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Cartesia Sonic 3.6 is available for voice agents

Cartesia’s newest Sonic model can now be selected as a synthesizer, as sonic-preview in the API and Sonic 3.6 (Beta) in the dashboard. It supports 42 languages and works with every Cartesia voice available in Bolna.Sonic 3.5 remains the recommended choice for production agents while 3.6 is in beta.Cartesia voice synthesis
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Eleven v3 is available for voice agents

ElevenLabs’ most expressive model, eleven_v3_conversational, can now be selected as a synthesizer. It supports 74 languages, including Hindi, Tamil, Bengali, Marathi, Gujarati, Kannada, Malayalam, Telugu and Punjabi, and every ElevenLabs voice available in Bolna works with it.One thing to know before switching an agent over: speed, style and similarity_boost have no effect on v3, and temperature maps to three stability presets (0.0 creative, 0.5 natural, 1.0 robust).Turbo remains the default and the lower-latency option.ElevenLabs voice synthesis
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Sarvam saaras:v4 Transcriber Support

Bolna now supports Sarvam’s saaras:v4 transcriber model — the latest Saaras speech-to-text model, transcribing directly in the original spoken language with automatic language detection support. Supports all 11 Indian languages.Learn more in the Sarvam STT documentation.
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🔌 Bolna joins viaSocket’s app directory

If you build automations in viaSocket, Bolna is now a first-class app you can drop into any flow — connect your API key once, no custom code needed.Six actions are live today:
  • Make a Phone Call — kick off an outbound call from any workflow
  • Get All Executions — pull call history and details into your flow
  • List Voice AI Agents — see every agent on your account
  • List Phone Numbers — see every number on your account
  • List Knowledgebases — see every knowledge base on your account
  • List Providers — see every provider connected to your account
📘 viaSocket integration overview · Create a Bolna API connection with viaSocket
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🛠️ The MCP server now controls nearly your whole account

When the Bolna MCP server launched, it covered the basics — agents, calls, transcripts, account info. It’s grown into something closer to a full remote control. From the same chat window, you can now say things like:
  • “Buy me a US number and route it to my support agent” — search, purchase, and set up inbound call routing
  • “Create a batch campaign from this CSV and schedule it for 9am” — batches can now be created, scheduled, stopped, or deleted, not just listed
  • “Add a disposition that pulls appointment_time out of every call” — structured, typed data out of every transcript
  • “Set up a SIP trunk for my Twilio account and attach these numbers” — bring your own telephony
  • “Cancel every queued call for this agent” — stop one call or a whole agent’s queue
  • “What did my Acme Corp sub-account spend this month?” — check and manage sub-accounts, and switch between them mid-conversation with a key you already have on hand
Anything that deletes something, spends money, or places a real call still pauses for your confirmation first, same as before.📘 MCP Overview · Tool List · Prompt Cheatsheet
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🎙️ Maya joins Bolna as a new voice synthesizer

Maya Research’s Maya 2 Native model is now available as a text-to-speech provider, with two voices — Ananya and Arjun — each covering all 11 supported languages, including Indian English.
  • Runs over a persistent WebSocket, so LLM output is spoken as it streams in rather than in fixed chunks
  • Language can switch mid-call without dropping the connection
  • Supports both telephony (mu-law) and web (native 24 kHz) audio
📘 Maya voice provider docs