OpenAI · Schema
SessionResource
A Managed Agents session.
LLMOpenAIArtificial IntelligenceGenerative AIChatbotsFoundation ModelsT1
Properties
| Name | Type | Description |
|---|---|---|
| metadata | object | Custom string key-value pairs attached to the session. |
| id | string | The ID of the session. |
| object | string | The object type. Always `agent.session`. |
| created_at | integer | The Unix timestamp, in seconds, when the session was created. |
| last_active_at | integer | The Unix timestamp, in seconds, when the session was last active. |
| status | object | The current status of the session. |
| required_actions | array | Actions that must be completed before the session can continue. |
| error | stringnull | The error that caused the session to fail, if any. |
| agent | object | The agent running in the session. |
| environment | object | The execution environment for the session. |
| vault_ids | array | The IDs of vaults made available to the session. |
| usage | object | Best-effort token usage for the session, or null if unknown. Recorded usage may change. |
JSON Schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"$id": "https://raw.githubusercontent.com/api-evangelist/openai/main/json-schema/openai-session-resource-schema.json",
"title": "SessionResource",
"description": "A Managed Agents session.",
"x-generated": "2026-09-23",
"x-method": "derived",
"x-generator": "derive-json-schema.py",
"x-source": "openapi/openai-agents-api-openapi.yml#/components/schemas/SessionResource",
"type": "object",
"properties": {
"metadata": {
"type": "object",
"additionalProperties": {
"type": "string",
"minLength": 0
},
"propertyNames": {
"type": "string",
"minLength": 0
},
"minProperties": 0,
"description": "Custom string key-value pairs attached to the session."
},
"id": {
"type": "string",
"minLength": 0,
"description": "The ID of the session."
},
"object": {
"type": "string",
"enum": [
"agent.session"
],
"default": "agent.session",
"x-stainless-const": true,
"description": "The object type. Always `agent.session`."
},
"created_at": {
"type": "integer",
"format": "int64",
"description": "The Unix timestamp, in seconds, when the session was created."
},
"last_active_at": {
"type": "integer",
"format": "int64",
"description": "The Unix timestamp, in seconds, when the session was last active."
},
"status": {
"$ref": "#/$defs/SessionStatusResource",
"description": "The current status of the session."
},
"required_actions": {
"type": "array",
"items": {
"$ref": "#/$defs/SessionRequiredActionResource"
},
"minItems": 0,
"maxItems": 2000,
"description": "Actions that must be completed before the session can continue."
},
"error": {
"description": "The error that caused the session to fail, if any.",
"type": [
"string",
"null"
],
"minLength": 0
},
"agent": {
"$ref": "#/$defs/SessionAgentResource",
"description": "The agent running in the session."
},
"environment": {
"$ref": "#/$defs/EnvironmentResource",
"description": "The execution environment for the session."
},
"vault_ids": {
"type": "array",
"items": {
"type": "string",
"minLength": 0
},
"minItems": 0,
"maxItems": 2000,
"description": "The IDs of vaults made available to the session."
},
"usage": {
"anyOf": [
{
"$ref": "#/$defs/TokenUsageResource"
},
{
"type": "null"
}
],
"description": "Best-effort token usage for the session, or null if unknown. Recorded usage may change."
}
},
"required": [
"metadata",
"id",
"object",
"created_at",
"last_active_at",
"status",
"required_actions",
"error",
"agent",
"environment",
"vault_ids",
"usage"
],
"additionalProperties": false,
"$defs": {
"AgentToolResource": {
"oneOf": [
{
"$ref": "#/$defs/AgentToolResourceFunction"
},
{
"$ref": "#/$defs/AgentToolResourceProgrammaticToolCalling"
},
{
"$ref": "#/$defs/AgentToolResourceMcp"
},
{
"$ref": "#/$defs/AgentToolResourceWebSearch"
}
],
"x-oai-discriminator-values": [
"function",
"programmatic_tool_calling",
"mcp",
"web_search"
],
"description": "A tool available to the agent."
},
"AgentToolResourceFunction": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"function"
],
"default": "function",
"x-stainless-const": true,
"description": "The type of the object. Always `function`."
},
"name": {
"type": "string",
"minLength": 0,
"description": "The name of the function."
},
"description": {
"type": "string",
"minLength": 0,
"description": "A description of what the function does."
},
"parameters": {
"type": "object",
"additionalProperties": {},
"propertyNames": {
"type": "string",
"minLength": 0
},
"minProperties": 0,
"description": "A JSON Schema object describing the function's arguments."
},
"defer_loading": {
"type": "boolean",
"description": "Whether the function is deferred and discovered through tool search."
}
},
"required": [
"type",
"name",
"description",
"parameters",
"defer_loading"
],
"additionalProperties": false,
"description": "A function defined by the application."
},
"AgentToolResourceMcp": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"mcp"
],
"default": "mcp",
"x-stainless-const": true,
"description": "The type of the object. Always `mcp`."
},
"server_label": {
"type": "string",
"minLength": 0,
"description": "A label used to identify the MCP server in tool calls."
},
"credential_id": {
"type": [
"string",
"null"
],
"minLength": 0,
"description": "The attached vault credential selected for this MCP server, if any. Optional when exactly one attached credential matches the server URL."
},
"transport": {
"$ref": "#/$defs/McpTransportResource",
"description": "The transport used to connect to the MCP server."
},
"request_metadata": {
"type": "object",
"additionalProperties": {},
"propertyNames": {
"type": "string",
"minLength": 0
},
"minProperties": 0,
"description": "Metadata included with requests to this MCP server."
},
"allowed_tools": {
"type": [
"array",
"null"
],
"items": {
"type": "string",
"minLength": 0
},
"minItems": 0,
"maxItems": 2000,
"description": "The MCP tools the agent may call."
},
"required": {
"type": "boolean",
"description": "Whether this MCP server must initialize before the first turn."
},
"connection_origin": {
"$ref": "#/$defs/McpConnectionOriginResource",
"description": "Where outbound MCP HTTP connections originate."
}
},
"required": [
"type",
"server_label",
"credential_id",
"transport",
"request_metadata",
"allowed_tools",
"required",
"connection_origin"
],
"additionalProperties": false,
"description": "Tools provided by a remote MCP server."
},
"AgentToolResourceProgrammaticToolCalling": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"programmatic_tool_calling"
],
"default": "programmatic_tool_calling",
"x-stainless-const": true,
"description": "The type of the object. Always `programmatic_tool_calling`."
},
"enabled": {
"type": "boolean",
"description": "Whether tools can be called from model-generated code."
}
},
"required": [
"type",
"enabled"
],
"additionalProperties": false,
"description": "Enables calling tools from model-generated code."
},
"AgentToolResourceWebSearch": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"web_search"
],
"default": "web_search",
"x-stainless-const": true,
"description": "The type of the object. Always `web_search`."
},
"mode": {
"$ref": "#/$defs/WebSearchModeResource",
"description": "The source used for web search results."
},
"context_size": {
"$ref": "#/$defs/WebSearchContextSizeResource",
"description": "The amount of search context made available to the model. Defaults to `medium`."
},
"allowed_domains": {
"type": [
"array",
"null"
],
"items": {
"type": "string",
"minLength": 0
},
"minItems": 0,
"maxItems": 2000,
"description": "Allowed search domains, or `null` when the search is unrestricted."
},
"location": {
"anyOf": [
{
"$ref": "#/$defs/WebSearchLocationResource"
},
{
"type": "null"
}
],
"description": "Approximate location used to localize search results, if provided."
}
},
"required": [
"type",
"mode",
"context_size",
"allowed_domains",
"location"
],
"additionalProperties": false,
"description": "Web search."
},
"EnvironmentPackagesResource": {
"type": "object",
"properties": {
"python": {
"type": "array",
"items": {
"type": "string",
"minLength": 0,
"maxLength": 1048576
},
"minItems": 0,
"maxItems": 16384,
"description": "Python packages installed in the environment."
},
"system": {
"type": "array",
"items": {
"type": "string",
"minLength": 0,
"maxLength": 1048576
},
"minItems": 0,
"maxItems": 16384,
"description": "System packages installed in the environment."
},
"npm": {
"type": "array",
"items": {
"type": "string",
"minLength": 0,
"maxLength": 1048576
},
"minItems": 0,
"maxItems": 16384,
"description": "npm packages installed globally in the environment."
}
},
"required": [
"python",
"system",
"npm"
],
"additionalProperties": false,
"description": "Packages installed in an OpenAI-hosted environment."
},
"EnvironmentResource": {
"oneOf": [
{
"$ref": "#/$defs/EnvironmentResourceNone"
},
{
"$ref": "#/$defs/EnvironmentResourceOpenaiHosted"
},
{
"$ref": "#/$defs/EnvironmentResourceSelfHosted"
}
],
"x-oai-discriminator-values": [
"none",
"openai_hosted",
"self_hosted"
],
"description": "The execution environment for a session."
},
"EnvironmentResourceNone": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"none"
],
"default": "none",
"x-stainless-const": true,
"description": "The type of the object. Always `none`."
}
},
"required": [
"type"
],
"additionalProperties": false,
"description": "The session talks to CCA without selecting or provisioning an execution environment."
},
"EnvironmentResourceOpenaiHosted": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"openai_hosted"
],
"default": "openai_hosted",
"x-stainless-const": true,
"description": "The type of the object. Always `openai_hosted`."
},
"id": {
"type": "string",
"minLength": 0,
"description": "The public ID of the environment."
},
"packages": {
"$ref": "#/$defs/EnvironmentPackagesResource",
"description": "Packages installed in the environment."
},
"network": {
"$ref": "#/$defs/NetworkPolicyResource",
"description": "The effective network access policy for the environment."
},
"capability_directories": {
"type": "array",
"items": {
"type": "string",
"minLength": 0
},
"minItems": 0,
"maxItems": 2000,
"description": "Directories that contain capabilities exposed to the agent."
},
"skills": {
"type": "array",
"items": {
"$ref": "#/$defs/HostedSkillResource"
},
"minItems": 0,
"maxItems": 2000,
"description": "Skills installed in the environment, excluding their archive contents."
},
"plugins": {
"type": "array",
"items": {
"$ref": "#/$defs/HostedPluginResource"
},
"minItems": 0,
"maxItems": 2000,
"description": "Plugins installed in the environment, excluding their archive contents."
},
"files": {
"type": "array",
"items": {
"$ref": "#/$defs/HostedEnvironmentFileResource"
},
"minItems": 0,
"maxItems": 50,
"description": "Files available in the environment, excluding their contents."
}
},
"required": [
"type",
"id",
"packages",
"network",
"capability_directories",
"skills",
"plugins",
"files"
],
"additionalProperties": false,
"description": "An environment hosted by OpenAI."
},
"EnvironmentResourceSelfHosted": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"self_hosted"
],
"default": "self_hosted",
"x-stainless-const": true,
"description": "The type of the object. Always `self_hosted`."
},
"remote_url": {
"type": "string",
"minLength": 0,
"description": "Pass this URL unchanged to `codex exec-server --remote` when connecting this environment."
},
"id": {
"type": "string",
"minLength": 0,
"description": "The public ID of the environment."
},
"workspace_directory": {
"type": "string",
"minLength": 0,
"description": "The absolute project directory inside the environment. Defaults to `/workspace`."
},
"capability_directories": {
"type": "array",
"items": {
"type": "string",
"minLength": 0
},
"minItems": 0,
"maxItems": 2000,
"description": "Directories that contain capabilities exposed to the agent."
}
},
"required": [
"type",
"remote_url",
"id",
"workspace_directory",
"capability_directories"
],
"additionalProperties": false,
"description": "An environment hosted by the application."
},
"HostedEnvironmentFileResource": {
"oneOf": [
{
"$ref": "#/$defs/HostedEnvironmentFileResourceFileId"
},
{
"$ref": "#/$defs/HostedEnvironmentFileResourceInline"
}
],
"x-oai-discriminator-values": [
"file_id",
"inline"
],
"description": "Metadata for a file materialized in an OpenAI-hosted execution environment."
},
"HostedEnvironmentFileResourceFileId": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"file_id"
],
"default": "file_id",
"x-stainless-const": true,
"description": "The type of the object. Always `file_id`."
},
"id": {
"type": "string",
"minLength": 0,
"description": "The session-scoped ID of the file in the execution environment."
},
"file_id": {
"type": "string",
"minLength": 0,
"description": "The ID of the uploaded file."
},
"path": {
"type": "string",
"minLength": 0,
"description": "The file's absolute path inside the environment."
},
"size_bytes": {
"type": "integer",
"format": "int64",
"minimum": 0,
"description": "The decoded file size in bytes."
}
},
"required": [
"type",
"id",
"file_id",
"path",
"size_bytes"
],
"additionalProperties": false,
"description": "A file copied from the OpenAI Files API."
},
"HostedEnvironmentFileResourceInline": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"inline"
],
"default": "inline",
"x-stainless-const": true,
"description": "The type of the object. Always `inline`."
},
"id": {
"type": "string",
"minLength": 0,
"description": "The session-scoped ID of the file in the execution environment."
},
"path": {
"type": "string",
"minLength": 0,
"description": "The file's absolute path inside the environment."
},
"size_bytes": {
"type": "integer",
"format": "int64",
"minimum": 0,
"description": "The decoded file size in bytes."
}
},
"required": [
"type",
"id",
"path",
"size_bytes"
],
"additionalProperties": false,
"description": "A file supplied inline when the session was created."
},
"HostedPluginResource": {
"oneOf": [
{
"$ref": "#/$defs/HostedPluginResourceInline"
}
],
"x-oai-discriminator-values": [
"inline"
],
"description": "A plugin installed in an OpenAI-hosted environment."
},
"HostedPluginResourceInline": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"inline"
],
"default": "inline",
"x-stainless-const": true,
"description": "The type of the object. Always `inline`."
},
"name": {
"type": "string",
"minLength": 0,
"description": "The installed plugin name."
},
"description": {
"type": "string",
"minLength": 0,
"description": "The installed plugin description."
}
},
"required": [
"type",
"name",
"description"
],
"additionalProperties": false,
"description": "A plugin installed from an inline ZIP archive."
},
"HostedSkillResource": {
"oneOf": [
{
"$ref": "#/$defs/HostedSkillResourceSkillReference"
},
{
"$ref": "#/$defs/HostedSkillResourceInline"
}
],
"x-oai-discriminator-values": [
"skill_reference",
"inline"
],
"description": "A skill installed in an OpenAI-hosted environment."
},
"HostedSkillResourceInline": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"inline"
],
"default": "inline",
"x-stainless-const": true,
"description": "The type of the object. Always `inline`."
},
"name": {
"type": "string",
"minLength": 0,
"description": "The installed skill name."
},
"description": {
"type": "string",
"minLength": 0,
"description": "The installed skill description."
}
},
"required": [
"type",
"name",
"description"
],
"additionalProperties": false,
"description": "A skill installed from an inline ZIP archive."
},
"HostedSkillResourceSkillReference": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"skill_reference"
],
"default": "skill_reference",
"x-stainless-const": true,
"description": "The type of the object. Always `skill_reference`."
},
"skill_id": {
"type": "string",
"minLength": 0,
"description": "The referenced skill ID."
},
"version": {
"type": "string",
"minLength": 0,
"description": "The concrete skill version installed for this session."
},
"name": {
"type": "string",
"minLength": 0,
"description": "The installed skill name."
},
"description": {
"type": "string",
"minLength": 0,
"description": "The installed skill description."
}
},
"required": [
"type",
"skill_id",
"version",
"name",
"description"
],
"additionalProperties": false,
"description": "A skill installed from the Skills API."
},
"InputTokensDetailsResource": {
"type": "object",
"properties": {
"cached_tokens": {
"type": "integer",
"format": "int64",
"description": "The number of input tokens retrieved from the prompt cache."
}
},
"required": [
"cached_tokens"
],
"additionalProperties": false,
"description": "A breakdown of input token usage for a session or turn."
},
"McpConnectionOriginResource": {
"type": "string",
"enum": [
"service",
"environment"
],
"description": "Where outbound MCP HTTP connections originate."
},
"McpTransportResource": {
"oneOf": [
{
"$ref": "#/$defs/McpTransportResourceHttp"
},
{
"$ref": "#/$defs/McpTransportResourceStdio"
}
],
"x-oai-discriminator-values": [
"http",
"stdio"
],
"description": "The transport used to connect to an MCP server."
},
"McpTransportResourceHttp": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"http"
],
"default": "http",
"x-stainless-const": true,
"description": "The type of the object. Always `http`."
},
"server_url": {
"type": "string",
"minLength": 0,
"description": "The URL of the MCP server."
}
},
"required": [
"type",
"server_url"
],
"additionalProperties": false,
"description": "Connects to an MCP server over HTTP."
},
"McpTransportResourceStdio": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"stdio"
],
"default": "stdio",
"x-stainless-const": true,
"description": "The type of the object. Always `stdio`."
},
"command": {
"type": "string",
"minLength": 0,
"description": "The command used to start the MCP server."
},
"args": {
"type": "array",
"items": {
"type": "string",
"minLength": 0
},
"minItems": 0,
"maxItems": 2000,
"description": "Arguments passed to the MCP server command."
},
"cwd": {
"type": "string",
"minLength": 0,
"description": "The working directory used to start the MCP server."
},
"env_vars": {
"type": "array",
"items": {
"type": "string",
"minLength": 0
},
"minItems": 0,
"maxItems": 2000,
"description": "Environment variable names inherited from the execution environment."
}
},
"required": [
"type",
"command",
"args",
"cwd",
"env_vars"
],
"additionalProperties": false,
"description": "Starts an MCP server as a local process."
},
"MultiAgentConfigResource": {
"type": "object",
"properties": {
"enabled": {
"type": "boolean",
"description": "Whether subagent tools are enabled. Defaults to false."
},
"max_concurrent_subagents": {
"type": [
"integer",
"null"
],
"format": "int64",
"minimum": 1,
"maximum": 4294967295,
"description": "Maximum number of subagents that may run concurrently, or null when disabled. Defaults to 6 when enabled."
}
},
"required": [
"enabled",
"max_concurrent_subagents"
],
"additionalProperties": false,
"description": "The resolved configuration for creating and coordinating subagents."
},
"NetworkAccessResource": {
"type": "string",
"enum": [
"enabled",
"disabled",
"restricted"
],
"x-enumDescriptions": [
"Allows unrestricted network access.",
"Disables network access.",
"Allows access only to configured domains."
],
"description": "The network access mode for an OpenAI-hosted environment."
},
"NetworkPolicyResource": {
"type": "object",
"properties": {
"access": {
"$ref": "#/$defs/NetworkAccessResource",
"description": "The environment's network access mode."
},
"allowed_domains": {
"type": "array",
"items": {
"type": "string",
"minLength": 0
},
"minItems": 0,
"maxItems": 2000,
"description": "Domains the environment may access when network access is restricted."
}
},
"required": [
"access",
"allowed_domains"
],
"additionalProperties": false,
"description": "Network access for an OpenAI-hosted environment."
},
"OutputTokensDetailsResource": {
"type": "object",
"properties": {
"reasoning_tokens": {
"type": "integer",
"format": "int64",
"description": "The number of output tokens used for reasoning."
}
},
"required": [
"reasoning_tokens"
],
"additionalProperties": false,
"description": "A breakdown of output token usage for a session or turn."
},
"ReasoningEffortResource": {
"type": "string",
"enum": [
"none",
"minimal",
"low",
"medium",
"high",
"xhigh",
"max"
],
"description": "The amount of reasoning effort used by an agent."
},
"ReasoningResource": {
"type": "object",
"properties": {
"effort": {
"anyOf": [
{
"$ref": "#/$defs/ReasoningEffortResource"
},
{
"type": "null"
}
],
"description": "The requested reasoning effort, or `null` when the model selects its own default."
},
"summary": {
"anyOf": [
{
"$ref": "#/$defs/ReasoningSummaryResource"
},
{
"type": "null"
}
],
"description": "The requested reasoning summary format, or `null` when summaries are disabled."
}
},
"required": [
"effort",
"summary"
],
"additionalProperties": false,
"description": "The reasoning configuration used by an agent."
},
"ReasoningSummaryResource": {
"type": "string",
"enum": [
"concise",
"detailed",
"auto"
],
"x-enumDescriptions": [
"Returns a concise reasoning summary when supported.",
"Returns a detailed reasoning summary when supported.",
"Automatically selects the most detailed summary supported by the model."
],
"description": "The reasoning summary format requested from an agent."
},
"ServiceTierResource": {
"type": "string",
"enum": [
"auto",
"default",
"flex",
"priority",
"fast"
],
"description": "The service-tier policy configured for an agent."
},
"SessionAgentResource": {
"type": "object",
"properties": {
"id": {
"type": "string",
"minLength": 0,
"description": "The ID of the agent."
},
"name": {
"type": [
"string",
"null"
],
"minLength": 0,
"description": "The reusable agent's name when the session was created, or null if no name was saved. Later changes to the agent's name do not affect this value."
},
"model": {
"type": "string",
"minLength": 0,
"description": "The model used by the agent."
},
"reasoning": {
"$ref": "#/$defs/ReasoningResource",
"description": "The agent's reasoning configuration."
},
"text": {
"$ref": "#/$defs/TextResource",
"description": "Configuration for text generated by the agent."
},
"service_tier": {
"$ref": "#/$defs/ServiceTierResource",
"description": "The effective service-tier policy for model requests. Defaults to `auto`."
},
"instructions": {
"type": [
"string",
"null"
],
"minLength": 0,
"description": "Custom instructions appended to the agent's default base instructions."
},
"tools": {
"type": "array",
"items": {
"$ref": "#/$defs/AgentToolResource"
},
"minItems": 0,
"maxItems": 2000,
"description": "Tools available to the agent."
},
"multi_agent": {
"$ref": "#/$defs/MultiAgentConfigResource",
"description": "Configuration for creating and coordinating subagents."
}
},
"required": [
"id",
"name",
"model",
"reasoning",
"text",
"service_tier",
"instructions",
"tools",
"multi_agent"
],
"additionalProperties": false,
"description": "The effective agent configuration for a session."
},
"SessionRequiredActionResource": {
"oneOf": [
{
"$ref": "#/$defs/SessionRequiredActionResourceFunctionCall"
},
{
"$ref": "#/$defs/SessionRequiredActionResourceEnvironmentConnection"
}
],
"x-oai-discriminator-values": [
"function_call",
"environment_connection"
],
"description": "An action that must be completed before a session can continue."
},
"SessionRequiredActionResourceEnvironmentConnection": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"environment_connection"
],
"default": "environment_connection",
"x-stainless-const": true,
"description": "The type of the object. Always `environment_connection`."
},
"environment_id": {
"type": "string",
"minLength": 0,
"description": "The ID of the environment to reconnect."
}
},
"required": [
"type",
"environment_id"
],
"additionalProperties": false,
"description": "Reconnect a session environment."
},
"SessionRequiredActionResourceFunctionCall": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"function_call"
],
"default": "function_call",
"x-stainless-const": true,
"description": "The type of the object. Always `function_call`."
},
"turn_id": {
"ty
# --- truncated at 32 KB (38 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/openai/refs/heads/main/json-schema/openai-session-resource-schema.json
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