New features, fixes, and API updates, shipped continuously.
Synthflow’s official Claude connector and plugin are now live. Use Synthflow’s capabilities from Claude, Claude Code, or Cowork in plain language.
The connector links Claude to your workspace. The plugin adds guided call and prompt reviews. See the guide to get started.
Phone numbers now support outbound SIP registration via the API. Set it when you import a number, or update an existing one.
On September 15, 2026, Synthflow will discontinue custom pricing plans. This affects partners who have connected their Stripe account and resell minutes to their customers: from that date, Synthflow will no longer bill subaccount minutes through Stripe on your behalf, and subscriptions created through custom pricing plans will stop working. Your own Synthflow subscription is not affected.
To keep your customers running without interruption, migrate their subscriptions to your own billing before September 15. The migration guide explains exactly what changes and how to complete the migration.
Custom actions and individual MCP tools can now play background audio while they run, giving callers feedback during slower requests.
The Synthflow status page has moved to a new platform that provides more reliable incident reporting and status updates. The address remains the same, so existing bookmarks and links continue to work.
Email subscriptions have been migrated automatically: if you currently receive status updates by email, no action is required. RSS subscriptions cannot be migrated. If you follow the status page by RSS, resubscribe on the status page to keep receiving updates.
The Five9 Handoff action returns a call from your agent to your Five9 workflow, passing routing context as X-Headers on the SIP BYE. The Five9 integration guide covers the full AI Agent Connect setup, from onboarding to the data exchanged in each direction.
Available on the Enterprise plan. Contact your account manager to activate it.
You can now rename conversations in Aurora. Give each thread a clear, descriptive name to keep your work organized.
WebSocket media is now the recommended way to build custom voice integrations for websites and apps. Instead of using the legacy PCM websocket, start a call from your backend and pass the returned WebSocket URL to your client to stream audio.
See the WebSocket media integration guide for details.
Hebrew joins the list of available languages for voice agents.
You can now set the sidebar to collapse, expand, or expand when hovering with the mouse. Find the control in the bottom left corner of the interface.
You can now listen in to a call while it is in progress. Open Call logs, find a call with the in-progress status, and monitor the live conversation. Monitoring is silent, so neither the agent nor the caller can hear you.
See Live call monitoring for details.
We added six new outbound IP addresses for the Global region. If your network uses a firewall allow-list, add these so platform traffic keeps flowing:
34.73.34.13834.26.71.17134.148.30.1034.138.149.22434.139.16.7934.23.185.86See the full list on the Egress IP addresses page. If you don’t restrict inbound traffic, no action is needed.