Where it fits
Speech synthesis
Neural, standard and generative voices can have different availability and rates. Do not apply one character rate to every engine.
Configure the connection
Configure AWS credentials with access to Polly and the intended region. Choose a voice and compatible engine in the speech settings.
Assistant configuration fragment. Merge this into your assistant; select current model and voice IDs from your account before saving.
{
"pipeline_mode": "cascading",
"tts_provider": "polly",
"tts_voice": "YOUR_POLLY_VOICE_ID"
}Keep provider secrets in workspace credentials. The public MCP provider matrix describes capabilities; it does not connect your provider account.
Test this boundary first
Read numbers, currency and business names aloud. Confirm the chosen voice/engine works in the configured AWS region.
Save a known working configuration and move one test route first. Inspect the call log before increasing traffic. Follow the staged migration guide.
Understand the bill
APIFleet adds $0.03 per connected AI minute, billed per second. Provider and carrier usage are additional. With your own keys, provider charges go directly to the provider. No monthly subscription or free call credits; prepaid top-ups start at $10.