Vapi Sessions API
The Sessions API from Vapi — 2 operation(s) for sessions.
Vapi Sessions API is one of 16 APIs that Vapi publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include Sessions. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and pricing.
This API exposes 5 operations across 2 paths, and defines 321 schemas. It is described by OpenAPI 3.2.0, at version 1.0.
Requests are made against a single base URL, https://api.vapi.ai.
5 operations
2 paths
321 schemas
1 DELETE2 GET1 PATCH1 POST
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
Vapi Sessions API declares
1 security scheme
for authenticating requests.
It accepts HTTP bearer tokens (Bearer) (bearer).
bearer— Retrieve your API Key from [Dashboard](dashboard.vapi.ai).
Paths & Operations 5
Across 2 paths, the API surfaces 5 operations — 1 DELETE, 2 GET, 1 PATCH, 1 POST. Each is listed below with its method, path, parameters, and response codes.
Sessions 5
POST
/session
Create Session
GET
/session
List Sessions
GET
/session/{id}
Get Session
PATCH
/session/{id}
Update Session
DELETE
/session/{id}
Delete Session
Schemas 321
The contract defines 321 schemas that model the data the API accepts and returns. The most detailed are AssistantOverrides (33 properties), CreateAssistantDTO (31 properties), Session (20 properties), Artifact (18 properties). Each schema is shown below with its type and property counts.
CreateVonageCredentialDTO
object
4 properties
3 required
SmartDenoisingPlan
object
1 property
CreateScorecardDTO
object
4 properties
1 required
BackoffPlan
object
4 properties
3 required
RegexCondition
object
4 properties
2 required
WellSaidVoice
object
8 properties
2 required
PerplexityAIModel
object
10 properties
2 required
PerformanceMetrics
object
10 properties
ComplianceOverride
object
1 property
SessionPaginatedResponse
object
2 properties
2 required
CreateXAiCredentialDTO
object
3 properties
2 required
AssistantCustomEndpointingRule
object
4 properties
3 required
HandoffDestinationAssistant
object
8 properties
1 required
FallbackOpenAITranscriber
object
3 properties
2 required
AnthropicModel
object
11 properties
2 required
CreateAssemblyAICredentialDTO
object
3 properties
2 required
CreateGoogleSheetsOAuth2AuthorizationCredentialDTO
object
3 properties
2 required
GcpKey
object
11 properties
11 required
CreateWellSaidCredentialDTO
object
3 properties
2 required
CreateLmntCredentialDTO
object
3 properties
2 required
WorkflowCustomModel
object
8 properties
3 required
CreateApiRequestToolDTO
object
15 properties
3 required
SmallestAIVoice
object
7 properties
2 required
FallbackHumeVoice
object
7 properties
2 required
McpToolMessages
object
2 properties
1 required
CreateHumeCredentialDTO
object
3 properties
2 required
FallbackAzureSpeechTranscriber
object
5 properties
1 required
HandoffDestinationSquad
object
8 properties
1 required
SayHookAction
object
3 properties
1 required
CallHookCallEnding
object
3 properties
2 required
CreateOpenAICredentialDTO
object
3 properties
2 required
AssistantOverrides
object
33 properties
SecurityFilterBase
object
ToolCallResultMessageWarning
object
3 properties
3 required
SonioxTranscriber
object
9 properties
1 required
CodeToolEnvironmentVariable
object
2 properties
2 required
FallbackDeepgramVoice
object
6 properties
2 required
CreateGoogleCalendarOAuth2AuthorizationCredentialDTO
object
3 properties
2 required
ContextEngineeringPlanNone
object
1 property
1 required
StopSpeakingPlan
object
5 properties
CreateDeepSeekCredentialDTO
object
3 properties
2 required
ToolRejectionPlan
object
1 property
GeminiMultimodalLiveVoiceConfig
object
1 property
1 required
CreateAzureCredentialDTO
object
7 properties
2 required
CustomTranscriber
object
3 properties
2 required
CompliancePlan
object
4 properties
CreateDeepgramCredentialDTO
object
4 properties
2 required
GoogleRealtimeConfig
object
5 properties
AssistantActivation
object
2 properties
1 required
ToolMessage
object
5 properties
3 required
CreateBashToolDTO
object
6 properties
3 required
CreateGoHighLevelMCPCredentialDTO
object
3 properties
2 required
FallbackSonioxTranscriber
object
8 properties
1 required
ElevenLabsPronunciationDictionaryLocator
object
2 properties
2 required
CreateVoicemailToolDTO
object
4 properties
1 required
OAuth2AuthenticationPlan
object
5 properties
4 required
AzureVoice
object
6 properties
2 required
AzureSpeechTranscriber
object
6 properties
1 required
CreateMistralCredentialDTO
object
3 properties
2 required
PhoneNumberHookCallEnding
object
3 properties
1 required
CreateMakeCredentialDTO
object
5 properties
4 required
TransferPhoneNumberHookAction
object
2 properties
1 required
PublicKeyEncryptionPlan
object
3 properties
3 required
RecordingConsentPlanVerbal
object
6 properties
2 required
XaiModel
object
10 properties
2 required
MessageTarget
object
2 properties
CartesiaExperimentalControls
object
2 properties
CreateSupabaseCredentialDTO
object
4 properties
1 required
Server
object
7 properties
FallbackAzureVoice
object
5 properties
2 required
CreateSlackOAuth2AuthorizationCredentialDTO
object
3 properties
2 required
CreateCustomLLMCredentialDTO
object
4 properties
2 required
TransferFallbackPlan
object
2 properties
1 required
CustomVoice
object
6 properties
2 required
FallbackVapiVoice
object
6 properties
2 required
StructuredDataPlan
object
4 properties
FallbackTavusVoice
object
10 properties
2 required
ContextEngineeringPlanUserAndAssistantMessages
object
1 property
1 required
CreateTextEditorToolDTO
object
6 properties
3 required
McpToolMetadata
object
1 property
CustomEndpointingModelSmartEndpointingPlan
object
2 properties
1 required
CreateAnthropicCredentialDTO
object
3 properties
2 required
AnalysisCost
object
7 properties
6 required
GladiaVocabularyItemDTO
object
4 properties
1 required
ElevenLabsVoice
object
16 properties
2 required
CreateSlackWebhookCredentialDTO
object
3 properties
2 required
CreateSonioxCredentialDTO
object
4 properties
2 required
CreateTogetherAICredentialDTO
object
3 properties
2 required
PhoneNumberCallRingingHookFilter
object
3 properties
3 required
CreateGoogleCalendarOAuth2ClientCredentialDTO
object
2 properties
1 required
CreateByoSipTrunkCredentialDTO
object
8 properties
1 required
WorkflowGoogleModel
object
4 properties
2 required
VapiVoicemailDetectionPlan
object
4 properties
1 required
CreateGoHighLevelCalendarEventCreateToolDTO
object
3 properties
1 required
FallbackElevenLabsVoice
object
15 properties
2 required
CreateGoHighLevelContactCreateToolDTO
object
3 properties
1 required
CreatePerplexityAICredentialDTO
object
3 properties
2 required
CreateCustomCredentialDTO
object
4 properties
2 required
WorkflowOpenAIModel
object
4 properties
2 required
OpenAIModel
object
14 properties
2 required
OpenAITranscriber
object
4 properties
2 required
HMACAuthenticationPlan
object
11 properties
3 required
VapiVoice
object
7 properties
2 required
HandoffDestinationDynamic
object
3 properties
1 required
TransferDestinationSip
object
7 properties
2 required
SupabaseBucketPlan
object
6 properties
5 required
AnthropicBedrockModel
object
11 properties
2 required
CreateInflectionAICredentialDTO
object
3 properties
2 required
AWSIAMCredentialsAuthenticationPlan
object
3 properties
3 required
CreateGroqCredentialDTO
object
3 properties
2 required
MessageAddHookAction
object
3 properties
2 required
WorkflowAnthropicBedrockModel
object
5 properties
2 required
FallbackAssemblyAITranscriber
object
15 properties
1 required
Oauth2AuthenticationSession
object
3 properties
AnthropicThinkingConfig
object
2 properties
2 required
BucketPlan
object
5 properties
1 required
BotMessage
object
7 properties
5 required
CreateInworldCredentialDTO
object
3 properties
2 required
CartesiaGenerationConfig
object
3 properties
CreateRimeAICredentialDTO
object
3 properties
2 required
AWSStsAuthenticationPlan
object
3 properties
2 required
OpenAIVoice
object
8 properties
2 required
LMNTVoice
object
7 properties
2 required
CreateOpenRouterCredentialDTO
object
3 properties
2 required
FallbackInworldVoice
object
8 properties
2 required
CreateGcpCredentialDTO
object
6 properties
2 required
SipTrunkGateway
object
7 properties
1 required
TwilioVoicemailDetectionPlan
object
7 properties
1 required
CreateAnthropicBedrockCredentialDTO
object
4 properties
3 required
TransferDestinationAssistant
object
5 properties
2 required
ArtifactPlan
object
17 properties
JsonSchema
object
9 properties
1 required
CreateTavusCredentialDTO
object
3 properties
2 required
MinimaxVoice
object
14 properties
2 required
CreateSessionDTO
object
13 properties
VariableExtractionPlan
object
2 properties
SonioxContextGeneralItem
object
2 properties
2 required
Session
object
20 properties
4 required
MinimaxLLMModel
object
10 properties
2 required
CustomerCustomEndpointingRule
object
4 properties
3 required
OpenAIMessage
object
2 properties
2 required
HumeVoice
object
8 properties
2 required
CreateSipRequestToolDTO
object
6 properties
2 required
FourierDenoisingPlan
object
6 properties
KeypadInputPlan
object
3 properties
AssistantMessage
object
6 properties
1 required
CreateComputerToolDTO
object
9 properties
5 required
CustomerSpeechTimeoutOptions
object
3 properties
1 required
TurnLatency
object
5 properties
FallbackGladiaTranscriber
object
15 properties
1 required
LivekitSmartEndpointingPlan
object
2 properties
1 required
FallbackOpenAIVoice
object
7 properties
2 required
FallbackTranscriberPlan
object
1 property
RimeAIVoice
object
12 properties
2 required
ElevenLabsTranscriber
object
8 properties
1 required
KnowledgeBase
object
5 properties
4 required
CreateElevenLabsCredentialDTO
object
3 properties
2 required
FormatPlan
object
4 properties
CreateEndCallToolDTO
object
3 properties
1 required
ModelCost
object
6 properties
5 required
CreateAnyscaleCredentialDTO
object
3 properties
2 required
CreateMinimaxCredentialDTO
object
4 properties
3 required
TranscriptPlan
object
3 properties
VapiPronunciationDictionaryLocator
object
2 properties
1 required
CustomLLMModel
object
15 properties
3 required
CreateCustomKnowledgeBaseDTO
object
2 properties
2 required
SystemMessage
object
4 properties
4 required
FallbackGoogleTranscriber
object
3 properties
1 required
AnyscaleModel
object
10 properties
2 required
CreateRunpodCredentialDTO
object
3 properties
2 required
TransportConfigurationTwilio
object
4 properties
1 required
ToolMessageComplete
object
6 properties
1 required
SayPhoneNumberHookAction
object
2 properties
2 required
FallbackCustomTranscriber
object
2 properties
2 required
CreateSpeechmaticsCredentialDTO
object
3 properties
2 required
CreateQueryToolDTO
object
4 properties
1 required
ToolCallHookAction
object
3 properties
1 required
FallbackDeepgramTranscriber
object
15 properties
1 required
GoogleVoicemailDetectionPlan
object
4 properties
1 required
GroqModel
object
10 properties
2 required
CreateGoHighLevelCalendarAvailabilityToolDTO
object
3 properties
1 required
CreateDtmfToolDTO
object
4 properties
1 required
SesameVoice
object
6 properties
3 required
TogetherAIModel
object
10 properties
2 required
RecordingConsentPlanStayOnLine
object
5 properties
2 required
CartesiaTranscriber
object
4 properties
1 required
CreateNeuphonicCredentialDTO
object
3 properties
2 required
StartSpeakingPlan
object
5 properties
SecurityFilterPlan
object
4 properties
FallbackSmallestAIVoice
object
6 properties
2 required
FallbackRimeAIVoice
object
11 properties
2 required
FallbackWellSaidVoice
object
7 properties
2 required
SquadMemberDTO
object
4 properties
CreateGoogleCalendarCreateEventToolDTO
object
3 properties
1 required
OpenRouterModel
object
10 properties
2 required
OpenAIFunctionParameters
object
3 properties
2 required
CreateTwilioCredentialDTO
object
6 properties
2 required
CerebrasModel
object
10 properties
2 required
TavusVoice
object
11 properties
2 required
VariableExtractionAlias
object
2 properties
2 required
AzureBlobStorageBucketPlan
object
3 properties
2 required
CreateS3CredentialDTO
object
8 properties
6 required
InflectionAIModel
object
10 properties
2 required
CreateCustomerDTO
object
8 properties
CreateSquadDTO
object
3 properties
1 required
BackgroundSpeechDenoisingPlan
object
2 properties
AssemblyAITranscriber
object
16 properties
1 required
FallbackSpeechmaticsTranscriber
object
12 properties
2 required
CreateCerebrasCredentialDTO
object
3 properties
2 required
CreateSlackSendMessageToolDTO
object
3 properties
1 required
Mono
object
3 properties
ToolCallMessage
object
5 properties
5 required
UpdateSessionDTO
object
4 properties
ToolMessageFailed
object
5 properties
1 required
CreateAzureOpenAICredentialDTO
object
7 properties
5 required
DeveloperMessage
object
4 properties
2 required
CreateGladiaCredentialDTO
object
3 properties
2 required
CartesiaGenerationConfigExperimental
object
1 property
SessionCost
object
2 properties
2 required
LangfuseObservabilityPlan
object
6 properties
2 required
ContextEngineeringPlanAll
object
1 property
1 required
AnalysisPlan
object
6 properties
CreateCartesiaCredentialDTO
object
4 properties
2 required
VapiSmartEndpointingPlan
object
1 property
1 required
ToolCall
object
3 properties
3 required
ToolCallFunction
object
2 properties
2 required
Artifact
object
18 properties
SpeechmaticsCustomVocabularyItem
object
2 properties
1 required
GeminiMultimodalLiveSpeechConfig
object
1 property
1 required
ScorecardMetric
object
2 properties
2 required
FallbackCustomVoice
object
5 properties
2 required
WorkflowAnthropicModel
object
5 properties
2 required
TextContent
object
3 properties
3 required
FallbackPlayHTVoice
object
12 properties
2 required
CreateLangfuseCredentialDTO
object
5 properties
4 required
ContextEngineeringPlanLastNMessages
object
2 properties
2 required
CreateSmsToolDTO
object
3 properties
1 required
SessionCreatedHook
object
3 properties
2 required
GeminiMultimodalLivePrebuiltVoiceConfig
object
1 property
1 required
ToolMessageStart
object
5 properties
1 required
InworldVoice
object
9 properties
2 required
CreateMcpToolDTO
object
6 properties
1 required
CreatePlayHTCredentialDTO
object
4 properties
3 required
GroupCondition
object
3 properties
3 required
RegexOption
object
2 properties
2 required
GoogleModel
object
11 properties
2 required
TransferPlan
object
12 properties
1 required
NeuphonicVoice
object
8 properties
3 required
OpenAIFunction
object
4 properties
1 required
MonitorPlan
object
5 properties
RegexReplacement
object
4 properties
3 required
CallHookFilter
object
3 properties
3 required
ToolMessageDelayed
object
5 properties
1 required
FallbackCartesiaTranscriber
object
3 properties
1 required
ImportTwilioPhoneNumberDTO
object
13 properties
2 required
CreateGoogleCredentialDTO
object
3 properties
2 required
ExactReplacement
object
4 properties
3 required
SbcConfiguration
object
GladiaTranscriber
object
16 properties
1 required
Recording
object
4 properties
CreateAssistantDTO
object
31 properties
CallHookCustomerSpeechInterrupted
object
2 properties
2 required
PhoneNumberCallEndingHookFilter
object
3 properties
3 required
CreateGoogleSheetsRowAppendToolDTO
object
3 properties
1 required
CloudflareR2BucketPlan
object
5 properties
1 required
OpenAIVoicemailDetectionPlan
object
4 properties
1 required
CallHookCustomerSpeechTimeout
object
4 properties
2 required
ToolParameter
object
2 properties
2 required
FallbackLMNTVoice
object
6 properties
2 required
TalkscriberTranscriber
object
4 properties
1 required
ContextEngineeringPlanPreviousAssistantMessages
object
1 property
1 required
FallbackSesameVoice
object
5 properties
3 required
CreateGoHighLevelContactGetToolDTO
object
3 properties
1 required
BearerAuthenticationPlan
object
4 properties
2 required
CreateWebhookCredentialDTO
object
3 properties
2 required
CreateDeepInfraCredentialDTO
object
3 properties
2 required
SummaryPlan
object
3 properties
PlayHTVoice
object
13 properties
2 required
DeepSeekModel
object
10 properties
2 required
SpeechmaticsTranscriber
object
13 properties
2 required
LiquidCondition
object
2 properties
2 required
CartesiaVoice
object
10 properties
2 required
CreateGoogleCalendarCheckAvailabilityToolDTO
object
3 properties
1 required
CreateTransferCallToolDTO
object
4 properties
1 required
PaginationMeta
object
9 properties
3 required
SuccessEvaluationPlan
object
4 properties
SpkiPemPublicKeyConfig
object
3 properties
2 required
DeepInfraModel
object
10 properties
2 required
FallbackPlan
object
1 property
1 required
FallbackCartesiaVoice
object
9 properties
2 required
CallHookAssistantSpeechInterrupted
object
2 properties
2 required
CreateHandoffToolDTO
object
6 properties
1 required
TavusConversationProperties
object
10 properties
FallbackNeuphonicVoice
object
7 properties
3 required
CreateCodeToolDTO
object
11 properties
2 required
FallbackElevenLabsTranscriber
object
7 properties
1 required
StructuredDataMultiPlan
object
2 properties
2 required
CreateFunctionToolDTO
object
8 properties
1 required
GoogleTranscriber
object
4 properties
1 required
DeepgramTranscriber
object
16 properties
1 required
NodeArtifact
object
3 properties
Condition
object
3 properties
3 required
TransferDestinationNumber
object
8 properties
2 required
GladiaCustomVocabularyConfigDTO
object
2 properties
1 required
CustomMessage
object
3 properties
1 required
CreateStructuredOutputDTO
object
9 properties
2 required
UserMessage
object
11 properties
5 required
CreateSmallestAICredentialDTO
object
3 properties
2 required
ChunkPlan
object
4 properties
ToolCallResultMessage
object
8 properties
6 required
DeepgramVoice
object
7 properties
2 required
PhoneNumberHookCallRinging
object
3 properties
2 required
CreateEmailCredentialDTO
object
3 properties
2 required
BothCustomEndpointingRule
object
6 properties
4 required
CreateGoHighLevelCredentialDTO
object
3 properties
2 required
TranscriptionEndpointingPlan
object
3 properties
VoicemailDetectionBackoffPlan
object
3 properties
SipTrunkOutboundAuthenticationPlan
object
3 properties
CreateCloudflareCredentialDTO
object
7 properties
1 required
FallbackTalkscriberTranscriber
object
3 properties
1 required
SipTrunkOutboundSipRegisterPlan
object
3 properties
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
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#Sessions
Where this information came from
This is an independent, third-party profile of Vapi Sessions API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
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