View All docsVoice APIOverviewTechnical DetailsGetting StartedBuild Your SolutionHow-to GuidesVoice NotificationsSimple IVRAdvanced IVRVoice Bot with Google DialogflowVoice Bot with Amazon LexCall TrackingMasked CallingVoicemailVoice JourneyCall WhisperCode SnippetsBefore You BeginMaking CallsMake an outbound callMake an outbound call with an NCCOConnect an inbound callReceiving CallsReceive an inbound callRecording CallsRecord a callRecord a named conversationRecord a messageRecord a call with split audioDownload a recordingRetrieving CallsRetrieve information for a callRetrieve information for all callsRetrieve Information for a ConversationRetrieve Information for All ConversationsList a User's ConversationsControlling MediaEarmuff a callMute a callPlay an audio stream into a callStop an audio stream in a callPlay DTMF into a callPlay text-to-speech into a callStop text-to-speech in a callSubscribe to real-time DTMF eventsUnsubscribe to real-time DTMF eventsControlling Conference CallsConnect callers into a conferenceControlling ConversationsTransfer a callTransfer a call with inline NCCOTrack NCCO progressRename a ConversationHandle User InputHandle user input with ASRHandle user input with DTMFManaging UsersCreate a UserDelete a UserGet a UserUpdate a UserList UsersHandling RTC EventsCreate an EventCreate a Custom EventDelete an EventGet an EventList EventsProgrammable SIPCreate a DomainCreate a Domain UserDelete a Domain UserQuery a Domain UserQuery Domain UsersQuery DomainsUpdate a Domain UserQuery a DomainUpdate a DomainDelete a DomainReferencesAPI ReferenceVoice API ReferenceMedia API ReferencePSIP API ReferenceNCCO ReferenceWebhook ReferenceConceptual GuidesCall FlowNumbersEndpointsText to SpeechCustomizing Spoken TextSpeech to TextDTMFCall Recording and TranscriptionWebSocketsVoicemail DetectionRegionsFraud PreventionProgrammable SIPTroubleshootingTutorialsConnect to a WebSocketBuild a Call MenuPlay Audio into a CallPlay Audio into a WebSocketMaking an App to App Voice CallMaking an In-app Voice CallOther Helpful ResourcesVoice InspectorTry it outLogsAnalyticsPricingBilling and paymentsRelated Blog PostsUsing Vonage APIsWorking with Vonage APIsConceptsAuthenticationGlossaryOpenAPISigning MessagesWebhooksToolsCLIJWT generatorNgrokPostmanPrism Online JWT generator tool You can generate JWTs for authentication using our online tool. Navigation Online JWT generator tool