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API Reference
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Agents

Retrieve an agent

GET/agents/{agent_id}

Retrieves a reusable agent by ID. See agent configuration.

Path ParametersExpand Collapse
agent_id: string
minLength0
maxLength1048576
ReturnsExpand Collapse
Agent object { id, created_at, instructions, 10 more }

A reusable agent scoped to the caller’s project.

id: string

The ID of the reusable agent.

minLength0
created_at: number

The Unix timestamp, in seconds, when the agent was created.

formatint64
instructions: string or null

Custom instructions appended to the agent’s default base instructions.

minLength0
metadata: map[string]

Custom string key-value pairs attached to the agent.

model: string

The requested model name used for inference.

minLength0
multi_agent: MultiAgentConfig { enabled, max_concurrent_subagents }

The resolved configuration for creating and coordinating subagents.

enabled: boolean

Whether subagent tools are enabled. Defaults to false.

max_concurrent_subagents: number or null

Maximum number of subagents that may run concurrently, or null when disabled. Defaults to 6 when enabled.

formatint64
minimum1
maximum4294967295
name: string or null

A human-readable name for the agent, or null if it is unnamed.

minLength0
object: "agent"

The object type. Always agent.

reasoning: AgentReasoning { effort, summary }

The resolved reasoning configuration, including the model default for an omitted effort.

effort: "none" or "minimal" or "low" or 4 more or null

The amount of reasoning effort used by an agent.

One of the following:
"none"
"minimal"
"low"
"medium"
"high"
"xhigh"
"max"
summary: "concise" or "detailed" or "auto" or null

The reasoning summary format requested from an agent.

One of the following:
"concise"

Returns a concise reasoning summary when supported.

"detailed"

Returns a detailed reasoning summary when supported.

"auto"

Automatically selects the most detailed summary supported by the model.

service_tier: "auto" or "default" or "flex" or 2 more

The resolved service-tier policy used for model requests.

One of the following:
"auto"
"default"
"flex"
"priority"
"fast"
text: AgentText { format, verbosity }

The resolved configuration for text generated by the agent.

format: TextFormat

The effective output format. Defaults to ordinary text.

One of the following:
Text object { type }

Generates ordinary text without a structured-output constraint.

type: "text"

The type of the object. Always text.

JSONSchema object { schema, type }

Constrains generated text to a JSON Schema.

schema: map[unknown]

The JSON Schema that generated text must match.

type: "json_schema"

The type of the object. Always json_schema.

verbosity: "low" or "medium" or "high"

The amount of text produced by the agent. Defaults to medium.

One of the following:
"low"
"medium"
"high"
tools: array of PersistedAgentTool

Tools available to the agent.

One of the following:
Function object { defer_loading, description, name, 2 more }

A function defined by the application.

defer_loading: boolean

Whether the function is deferred and discovered through tool search.

description: string

A description of what the function does.

minLength0
name: string

The name of the function.

minLength0
parameters: map[unknown]

A JSON Schema object describing the function’s arguments.

type: "function"

The type of the object. Always function.

ToolSearch object { type }

Discovers deferred function tools and loads them into the model context.

type: "tool_search"

The type of the object. Always tool_search.

ProgrammaticToolCalling object { enabled, type }

Enables calling tools from model-generated code.

enabled: boolean

Whether tools can be called from model-generated code.

type: "programmatic_tool_calling"

The type of the object. Always programmatic_tool_calling.

Mcp object { allowed_tools, connection_origin, credential_id, 5 more }

Tools provided by a remote MCP server without stored credentials.

allowed_tools: array of string or null

The MCP tools the agent may call, or null when all server tools are allowed.

connection_origin: "service" or "environment"

Where outbound MCP HTTP connections originate.

One of the following:
"service"
"environment"
credential_id: string or null

The vault credential selected for this MCP server, if any.

minLength0
request_metadata: map[unknown]

Metadata included with requests to this MCP server.

required: boolean

Whether this MCP server must initialize before the first turn.

server_label: string

A label used to identify the MCP server in tool calls.

minLength0
transport: PersistedMcpTransport

The credential-free transport used to connect to the MCP server.

One of the following:
HTTP object { headers, server_url, type }

Connects to an MCP server over HTTP.

headers: map[string]

Non-secret HTTP headers sent to the MCP server.

server_url: string

The URL of the MCP server.

minLength0
type: "http"

The type of the object. Always http.

Stdio object { args, command, cwd, 2 more }

Starts an MCP server as a local process.

args: array of string

Arguments passed to the MCP server command.

command: string

The command used to start the MCP server.

minLength0
cwd: string

The working directory used to start the MCP server.

minLength0
env_vars: array of string

Environment variable names inherited from the execution environment.

type: "stdio"

The type of the object. Always stdio.

type: "mcp"

The type of the object. Always mcp.

WebSearch object { allowed_domains, context_size, location, 2 more }

Web search.

allowed_domains: array of string or null

Allowed search domains, or null when the search is unrestricted.

context_size: "low" or "medium" or "high"

The amount of search context made available to the model. Defaults to medium.

One of the following:
"low"
"medium"
"high"
location: object { city, country, region, timezone } or null

Approximate user location used to localize web search results.

city: string or null

The city name.

minLength0
country: string or null

The two-letter ISO country code, such as US.

minLength0
region: string or null

The region or state name.

minLength0
timezone: string or null

The IANA timezone, such as America/Los_Angeles.

minLength0
mode: "disabled" or "cached" or "live"

The source used for web search results.

One of the following:
"disabled"
"cached"
"live"
type: "web_search"

The type of the object. Always web_search.

updated_at: number

The Unix timestamp, in seconds, when the agent was last updated.

formatint64

Retrieve an agent

curl https://api.openai.com/v1/agents/$AGENT_ID \
    -H 'OpenAI-Beta: agents=v1' \
    -H "Authorization: Bearer $OPENAI_API_KEY"
{
  "id": "id",
  "created_at": 0,
  "instructions": "instructions",
  "metadata": {
    "foo": "string"
  },
  "model": "model",
  "multi_agent": {
    "enabled": true,
    "max_concurrent_subagents": 1
  },
  "name": "name",
  "object": "agent",
  "reasoning": {
    "effort": "none",
    "summary": "concise"
  },
  "service_tier": "auto",
  "text": {
    "format": {
      "type": "text"
    },
    "verbosity": "low"
  },
  "tools": [
    {
      "defer_loading": true,
      "description": "description",
      "name": "name",
      "parameters": {
        "foo": "bar"
      },
      "type": "function"
    }
  ],
  "updated_at": 0
}
Returns Examples
{
  "id": "id",
  "created_at": 0,
  "instructions": "instructions",
  "metadata": {
    "foo": "string"
  },
  "model": "model",
  "multi_agent": {
    "enabled": true,
    "max_concurrent_subagents": 1
  },
  "name": "name",
  "object": "agent",
  "reasoning": {
    "effort": "none",
    "summary": "concise"
  },
  "service_tier": "auto",
  "text": {
    "format": {
      "type": "text"
    },
    "verbosity": "low"
  },
  "tools": [
    {
      "defer_loading": true,
      "description": "description",
      "name": "name",
      "parameters": {
        "foo": "bar"
      },
      "type": "function"
    }
  ],
  "updated_at": 0
}