Get started
Synthesys Developer Platform
Build voice AI agents into your product. Place calls, manage contacts, and get transcripts, recordings and analytics back through one API.
The Synthesys API lets your software do what your team does in the dashboard. Choose a starting point below.
QuickstartCreate an API key, make your first request, place a call and track it.Place outbound callsHave an agent call a lead from your own app or workflow.Get call resultsReceive transcripts and outcomes as soon as a call ends.Sync your CRMKeep contacts and audiences in step with your own system.Give agents custom functionsLet an agent call your API during a conversation.Track usage and spendReport on wallet balance, usage and call performance.
Make your first request
Every request goes to https://backend.synthesys.app/api and sends your key in the SYNTH_API_KEY header.
curl https://backend.synthesys.app/api/v1/agents \
-H "SYNTH_API_KEY: YOUR_API_KEY"