Vapi
./CommunicateVoice agent platform handling telephony, turn-taking, interruptions, and warm transfers
MCPOpenAPIllms.txt
$ protocol support
$ payment protocols
none documented — this service is not reachable over an agent payment protocol
$ agent access
authAPI Key
onboardingFull — agent can self-onboard
tosExplicitly welcomes bots
webhooksYes
free tierYes
billingpay-per-second
#voice-agents#telephony#realtime#phone
https://vapi.ai
// last verified 8/26/2026
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