Retell AI
./CommunicateManaged phone agents with conversation design, simulation testing, and production monitoring
OpenAPIllms.txt
$ 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#phone#monitoring
https://www.retellai.com
// last verified 8/26/2026
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