API Reference

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ChatKit

ModelsExpand Collapse

ChatKitWorkflow = object { id, state_variables, tracing, version }

Workflow metadata and state returned for the session.

id: string

Identifier of the workflow backing the session.

state_variables: map[string or boolean or number]

State variable key-value pairs applied when invoking the workflow. Defaults to null when no overrides were provided.

Accepts one of the following:

UnionMember0 = string

UnionMember1 = boolean

UnionMember2 = number

tracing: object { enabled }

Tracing settings applied to the workflow.

enabled: boolean

Indicates whether tracing is enabled.

version: string

Specific workflow version used for the session. Defaults to null when using the latest deployment.

ChatKitSessions

Cancel chat session

POST/chatkit/sessions/{session_id}/cancel

Create ChatKit session

POST/chatkit/sessions

ChatKitThreads

List ChatKit thread items

GET/chatkit/threads/{thread_id}/items

Retrieve ChatKit thread

GET/chatkit/threads/{thread_id}

Delete ChatKit thread

DELETE/chatkit/threads/{thread_id}

List ChatKit threads

GET/chatkit/threads

ModelsExpand Collapse

ChatSession = object { id, chatkit_configuration, client_secret, 7 more }

Represents a ChatKit session and its resolved configuration.

id: string

Identifier for the ChatKit session.

chatkit_configuration: ChatSessionChatKitConfiguration { automatic_thread_titling, file_upload, history }

Resolved ChatKit feature configuration for the session.

client_secret: string

Ephemeral client secret that authenticates session requests.

expires_at: number

Unix timestamp (in seconds) for when the session expires.

max_requests_per_1_minute: number

Convenience copy of the per-minute request limit.

object: "chatkit.session"

Type discriminator that is always chatkit.session.

rate_limits: ChatSessionRateLimits { max_requests_per_1_minute }

Resolved rate limit values.

status: ChatSessionStatus

Current lifecycle state of the session.

user: string

User identifier associated with the session.

workflow: ChatKitWorkflow { id, state_variables, tracing, version }

Workflow metadata for the session.

ChatSessionAutomaticThreadTitling = object { enabled }

Automatic thread title preferences for the session.

enabled: boolean

Whether automatic thread titling is enabled.

ChatSessionChatKitConfiguration = object { automatic_thread_titling, file_upload, history }

ChatKit configuration for the session.

automatic_thread_titling: ChatSessionAutomaticThreadTitling { enabled }

Automatic thread titling preferences.

file_upload: ChatSessionFileUpload { enabled, max_file_size, max_files }

Upload settings for the session.

history: ChatSessionHistory { enabled, recent_threads }

History retention configuration.

ChatSessionChatKitConfigurationParam = object { automatic_thread_titling, file_upload, history }

Optional per-session configuration settings for ChatKit behavior.

automatic_thread_titling: optional object { enabled }

Configuration for automatic thread titling. When omitted, automatic thread titling is enabled by default.

enabled: optional boolean

Enable automatic thread title generation. Defaults to true.

file_upload: optional object { enabled, max_file_size, max_files }

Configuration for upload enablement and limits. When omitted, uploads are disabled by default (max_files 10, max_file_size 512 MB).

enabled: optional boolean

Enable uploads for this session. Defaults to false.

max_file_size: optional number

Maximum size in megabytes for each uploaded file. Defaults to 512 MB, which is the maximum allowable size.

maximum512

minimum1

max_files: optional number

Maximum number of files that can be uploaded to the session. Defaults to 10.

minimum1

history: optional object { enabled, recent_threads }

Configuration for chat history retention. When omitted, history is enabled by default with no limit on recent_threads (null).

enabled: optional boolean

Enables chat users to access previous ChatKit threads. Defaults to true.

recent_threads: optional number

Number of recent ChatKit threads users have access to. Defaults to unlimited when unset.

minimum1

ChatSessionExpiresAfterParam = object { anchor, seconds }

Controls when the session expires relative to an anchor timestamp.

anchor: "created_at"

Base timestamp used to calculate expiration. Currently fixed to created_at.

seconds: number

Number of seconds after the anchor when the session expires.

maximum600

minimum1

ChatSessionFileUpload = object { enabled, max_file_size, max_files }

Upload permissions and limits applied to the session.

enabled: boolean

Indicates if uploads are enabled for the session.

max_file_size: number

Maximum upload size in megabytes.

max_files: number

Maximum number of uploads allowed during the session.

ChatSessionHistory = object { enabled, recent_threads }

History retention preferences returned for the session.

enabled: boolean

Indicates if chat history is persisted for the session.

recent_threads: number

Number of prior threads surfaced in history views. Defaults to null when all history is retained.

ChatSessionRateLimits = object { max_requests_per_1_minute }

Active per-minute request limit for the session.

max_requests_per_1_minute: number

Maximum allowed requests per one-minute window.

ChatSessionRateLimitsParam = object { max_requests_per_1_minute }

Controls request rate limits for the session.

max_requests_per_1_minute: optional number

Maximum number of requests allowed per minute for the session. Defaults to 10.

minimum1

ChatSessionStatus = "active" or "expired" or "cancelled"

Accepts one of the following:

"active"

"expired"

"cancelled"

ChatSessionWorkflowParam = object { id, state_variables, tracing, version }

Workflow reference and overrides applied to the chat session.

id: string

Identifier for the workflow invoked by the session.

state_variables: optional map[string or boolean or number]

State variables forwarded to the workflow. Keys may be up to 64 characters, values must be primitive types, and the map defaults to an empty object.

Accepts one of the following:

UnionMember0 = string

UnionMember1 = boolean

UnionMember2 = number

tracing: optional object { enabled }

Optional tracing overrides for the workflow invocation. When omitted, tracing is enabled by default.

enabled: optional boolean

Whether tracing is enabled during the session. Defaults to true.

version: optional string

Specific workflow version to run. Defaults to the latest deployed version.

ChatKitAttachment = object { id, mime_type, name, 2 more }

Attachment metadata included on thread items.

id: string

Identifier for the attachment.

mime_type: string

MIME type of the attachment.

name: string

Original display name for the attachment.

preview_url: string

Preview URL for rendering the attachment inline.

type: "image" or "file"

Attachment discriminator.

Accepts one of the following:

"image"

"file"

ChatKitResponseOutputText = object { annotations, text, type }

Assistant response text accompanied by optional annotations.

annotations: array of object { source, type } or object { source, type }

Ordered list of annotations attached to the response text.

Accepts one of the following:

File = object { source, type }

Annotation that references an uploaded file.

source: object { filename, type }

File attachment referenced by the annotation.

filename: string

Filename referenced by the annotation.

type: "file"

Type discriminator that is always file.

type: "file"

Type discriminator that is always file for this annotation.

URL = object { source, type }

Annotation that references a URL.

source: object { type, url }

URL referenced by the annotation.

type: "url"

Type discriminator that is always url.

url: string

URL referenced by the annotation.

type: "url"

Type discriminator that is always url for this annotation.

text: string

Assistant generated text.

type: "output_text"

Type discriminator that is always output_text.

ChatKitThread = object { id, created_at, object, 3 more }

Represents a ChatKit thread and its current status.

id: string

Identifier of the thread.

created_at: number

Unix timestamp (in seconds) for when the thread was created.

object: "chatkit.thread"

Type discriminator that is always chatkit.thread.

status: object { type } or object { reason, type } or object { reason, type }

Current status for the thread. Defaults to active for newly created threads.

Accepts one of the following:

Active = object { type }

Indicates that a thread is active.

type: "active"

Status discriminator that is always active.

Locked = object { reason, type }

Indicates that a thread is locked and cannot accept new input.

reason: string

Reason that the thread was locked. Defaults to null when no reason is recorded.

type: "locked"

Status discriminator that is always locked.

Closed = object { reason, type }

Indicates that a thread has been closed.

reason: string

Reason that the thread was closed. Defaults to null when no reason is recorded.

type: "closed"

Status discriminator that is always closed.

title: string

Optional human-readable title for the thread. Defaults to null when no title has been generated.

user: string

Free-form string that identifies your end user who owns the thread.

ChatKitThreadAssistantMessageItem = object { id, content, created_at, 3 more }

Assistant-authored message within a thread.

id: string

Identifier of the thread item.

content: array of ChatKitResponseOutputText { annotations, text, type }

Ordered assistant response segments.

annotations: array of object { source, type } or object { source, type }

Ordered list of annotations attached to the response text.

Accepts one of the following:

File = object { source, type }

Annotation that references an uploaded file.

source: object { filename, type }

File attachment referenced by the annotation.

filename: string

Filename referenced by the annotation.

type: "file"

Type discriminator that is always file.

type: "file"

Type discriminator that is always file for this annotation.

URL = object { source, type }

Annotation that references a URL.

source: object { type, url }

URL referenced by the annotation.

type: "url"

Type discriminator that is always url.

url: string

URL referenced by the annotation.

type: "url"

Type discriminator that is always url for this annotation.

text: string

Assistant generated text.

type: "output_text"

Type discriminator that is always output_text.

created_at: number

Unix timestamp (in seconds) for when the item was created.

object: "chatkit.thread_item"

Type discriminator that is always chatkit.thread_item.

thread_id: string

Identifier of the parent thread.

type: "chatkit.assistant_message"

Type discriminator that is always chatkit.assistant_message.

ChatKitThreadItemList = object { data, first_id, has_more, 2 more }

A paginated list of thread items rendered for the ChatKit API.

data: array of ChatKitThreadUserMessageItem { id, attachments, content, 5 more } or ChatKitThreadAssistantMessageItem { id, content, created_at, 3 more } or ChatKitWidgetItem { id, created_at, object, 3 more } or 3 more

A list of items

Accepts one of the following:

ChatKitThreadUserMessageItem = object { id, attachments, content, 5 more }

User-authored messages within a thread.

id: string

Identifier of the thread item.

attachments: array of ChatKitAttachment { id, mime_type, name, 2 more }

Attachments associated with the user message. Defaults to an empty list.

id: string

Identifier for the attachment.

mime_type: string

MIME type of the attachment.

name: string

Original display name for the attachment.

preview_url: string

Preview URL for rendering the attachment inline.

type: "image" or "file"

Attachment discriminator.

Accepts one of the following:

"image"

"file"

content: array of object { text, type } or object { text, type }

Ordered content elements supplied by the user.

Accepts one of the following:

InputText = object { text, type }

Text block that a user contributed to the thread.

text: string

Plain-text content supplied by the user.

type: "input_text"

Type discriminator that is always input_text.

QuotedText = object { text, type }

Quoted snippet that the user referenced in their message.

text: string

Quoted text content.

type: "quoted_text"

Type discriminator that is always quoted_text.

created_at: number

Unix timestamp (in seconds) for when the item was created.

inference_options: object { model, tool_choice }

Inference overrides applied to the message. Defaults to null when unset.

model: string

Model name that generated the response. Defaults to null when using the session default.

tool_choice: object { id }

Preferred tool to invoke. Defaults to null when ChatKit should auto-select.

id: string

Identifier of the requested tool.

object: "chatkit.thread_item"

Type discriminator that is always chatkit.thread_item.

thread_id: string

Identifier of the parent thread.

type: "chatkit.user_message"

ChatKitThreadAssistantMessageItem = object { id, content, created_at, 3 more }

Assistant-authored message within a thread.

id: string

Identifier of the thread item.

content: array of ChatKitResponseOutputText { annotations, text, type }

Ordered assistant response segments.

annotations: array of object { source, type } or object { source, type }

Ordered list of annotations attached to the response text.

Accepts one of the following:

File = object { source, type }

Annotation that references an uploaded file.

source: object { filename, type }

File attachment referenced by the annotation.

filename: string

Filename referenced by the annotation.

type: "file"

Type discriminator that is always file.

type: "file"

Type discriminator that is always file for this annotation.

URL = object { source, type }

Annotation that references a URL.

source: object { type, url }

URL referenced by the annotation.

type: "url"

Type discriminator that is always url.

url: string

URL referenced by the annotation.

type: "url"

Type discriminator that is always url for this annotation.

text: string

Assistant generated text.

type: "output_text"

Type discriminator that is always output_text.

created_at: number

Unix timestamp (in seconds) for when the item was created.

object: "chatkit.thread_item"

Type discriminator that is always chatkit.thread_item.

thread_id: string

Identifier of the parent thread.

type: "chatkit.assistant_message"

Type discriminator that is always chatkit.assistant_message.

ChatKitWidgetItem = object { id, created_at, object, 3 more }

Thread item that renders a widget payload.

id: string

Identifier of the thread item.

created_at: number

Unix timestamp (in seconds) for when the item was created.

object: "chatkit.thread_item"

Type discriminator that is always chatkit.thread_item.

thread_id: string

Identifier of the parent thread.

type: "chatkit.widget"

Type discriminator that is always chatkit.widget.

widget: string

Serialized widget payload rendered in the UI.

ChatKitClientToolCall = object { id, arguments, call_id, 7 more }

Record of a client side tool invocation initiated by the assistant.

id: string

Identifier of the thread item.

arguments: string

JSON-encoded arguments that were sent to the tool.

call_id: string

Identifier for the client tool call.

created_at: number

Unix timestamp (in seconds) for when the item was created.

name: string

Tool name that was invoked.

object: "chatkit.thread_item"

Type discriminator that is always chatkit.thread_item.

output: string

JSON-encoded output captured from the tool. Defaults to null while execution is in progress.

status: "in_progress" or "completed"

Execution status for the tool call.

Accepts one of the following:

"in_progress"

"completed"

thread_id: string

Identifier of the parent thread.

type: "chatkit.client_tool_call"

Type discriminator that is always chatkit.client_tool_call.

ChatKitTask = object { id, created_at, heading, 5 more }

Task emitted by the workflow to show progress and status updates.

id: string

Identifier of the thread item.

created_at: number

Unix timestamp (in seconds) for when the item was created.

heading: string

Optional heading for the task. Defaults to null when not provided.

object: "chatkit.thread_item"

Type discriminator that is always chatkit.thread_item.

summary: string

Optional summary that describes the task. Defaults to null when omitted.

task_type: "custom" or "thought"

Subtype for the task.

Accepts one of the following:

"custom"

"thought"

thread_id: string

Identifier of the parent thread.

type: "chatkit.task"

Type discriminator that is always chatkit.task.

ChatKitTaskGroup = object { id, created_at, object, 3 more }

Collection of workflow tasks grouped together in the thread.

id: string

Identifier of the thread item.

created_at: number

Unix timestamp (in seconds) for when the item was created.

object: "chatkit.thread_item"

Type discriminator that is always chatkit.thread_item.

tasks: array of object { heading, summary, type }

Tasks included in the group.

heading: string

Optional heading for the grouped task. Defaults to null when not provided.

summary: string

Optional summary that describes the grouped task. Defaults to null when omitted.

type: "custom" or "thought"

Subtype for the grouped task.

Accepts one of the following:

"custom"

"thought"

thread_id: string

Identifier of the parent thread.

type: "chatkit.task_group"

Type discriminator that is always chatkit.task_group.

first_id: string

The ID of the first item in the list.

has_more: boolean

Whether there are more items available.

last_id: string

The ID of the last item in the list.

object: "list"

The type of object returned, must be list.

ChatKitThreadUserMessageItem = object { id, attachments, content, 5 more }

User-authored messages within a thread.

id: string

Identifier of the thread item.

attachments: array of ChatKitAttachment { id, mime_type, name, 2 more }

Attachments associated with the user message. Defaults to an empty list.

id: string

Identifier for the attachment.

mime_type: string

MIME type of the attachment.

name: string

Original display name for the attachment.

preview_url: string

Preview URL for rendering the attachment inline.

type: "image" or "file"

Attachment discriminator.

Accepts one of the following:

"image"

"file"

content: array of object { text, type } or object { text, type }

Ordered content elements supplied by the user.

Accepts one of the following:

InputText = object { text, type }

Text block that a user contributed to the thread.

text: string

Plain-text content supplied by the user.

type: "input_text"

Type discriminator that is always input_text.

QuotedText = object { text, type }

Quoted snippet that the user referenced in their message.

text: string

Quoted text content.

type: "quoted_text"

Type discriminator that is always quoted_text.

created_at: number

Unix timestamp (in seconds) for when the item was created.

inference_options: object { model, tool_choice }

Inference overrides applied to the message. Defaults to null when unset.

model: string

Model name that generated the response. Defaults to null when using the session default.

tool_choice: object { id }

Preferred tool to invoke. Defaults to null when ChatKit should auto-select.

id: string

Identifier of the requested tool.

object: "chatkit.thread_item"

Type discriminator that is always chatkit.thread_item.

thread_id: string

Identifier of the parent thread.

type: "chatkit.user_message"

ChatKitWidgetItem = object { id, created_at, object, 3 more }

Thread item that renders a widget payload.

id: string

Identifier of the thread item.

created_at: number

Unix timestamp (in seconds) for when the item was created.

object: "chatkit.thread_item"

Type discriminator that is always chatkit.thread_item.

thread_id: string

Identifier of the parent thread.

type: "chatkit.widget"

Type discriminator that is always chatkit.widget.

widget: string

Serialized widget payload rendered in the UI.