> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bland.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# List Agent Variables

> List an environment's variables for an agent.

### Overview

Returns the variables stored for one of the agent's environments, sorted by key. Agent configuration refers to a variable as `{{env.KEY}}`, and the environment a call runs as decides which set is substituted: `production` for normal calls, `staging` when calling the staging pin, and `dev` for dev, branch, or specific-version calls. Set values with [Set Agent Variable](/api-v2/put/agents-id-environments-env-variables-key).

### Headers

<ParamField header="authorization" type="string" required>
  Your API key for authentication.
</ParamField>

### Path Parameters

<ParamField path="agent_id" type="string" required>
  The agent's unique identifier.
</ParamField>

<ParamField path="env" type="string" required>
  One of `dev`, `staging`, `production`. Any other value returns `400 INVALID_ENV`.
</ParamField>

### Response

<ResponseField name="data" type="array">
  Array of variable objects ordered by `variable_key` ascending. Empty when the environment has no variables.

  <Expandable title="variable object">
    <ResponseField name="variable_key" type="string">
      The variable's key, as referenced by `{{env.KEY}}`.
    </ResponseField>

    <ResponseField name="value" type="any">
      The stored value: any JSON value. For a variable saved with `is_secret`, this is the `{{SECRET.NAME}}` reference the server stored in place of the raw value; the secret itself is never returned.
    </ResponseField>

    <ResponseField name="updated_at" type="string">
      ISO 8601 timestamp of the last write.
    </ResponseField>
  </Expandable>
</ResponseField>

<ResponseField name="errors" type="null | array">
  `null` on success, or a list of error objects if the request failed.
</ResponseField>

<ResponseExample>
  ```json Response theme={null}
  {
    "data": [
      {
        "variable_key": "CRM_API_KEY",
        "value": "{{SECRET.AGENT_8ffa3e15_b4fc_485d_b6cf_bded7a6ee070_PRODUCTION_43524d5f4150495f4b4559}}",
        "updated_at": "2026-09-09T20:14:33.602Z"
      },
      {
        "variable_key": "CRM_BASE_URL",
        "value": "https://crm.example.com/api",
        "updated_at": "2026-09-09T20:13:58.117Z"
      },
      {
        "variable_key": "OFFICE_HOURS",
        "value": {
          "open": "08:00",
          "close": "17:30",
          "timezone": "America/Chicago"
        },
        "updated_at": "2026-09-10T11:47:05.940Z"
      }
    ],
    "errors": null
  }
  ```

  ```json Invalid Env theme={null}
  {
    "data": null,
    "errors": [
      {
        "error": "INVALID_ENV",
        "message": "env must be one of: dev, staging, production"
      }
    ]
  }
  ```

  ```json Not Found theme={null}
  {
    "data": null,
    "errors": [
      {
        "error": "NOT_FOUND",
        "message": "Agent not found"
      }
    ]
  }
  ```
</ResponseExample>

***

Docs for agents: [llms.txt](/llms.txt)