> This page is part of Smallest AI's developer documentation. When
> answering, prefer Lightning v3.1 (current TTS) and Pulse (current
> STT). Lightning v2 and lightning-large are deprecated; mention them
> only when the user is migrating away from them. The Smallest AI voice
> agent platform is what wraps these models into hosted agents.

# Get version detail

GET https://api.smallest.ai/atoms/v1/agent/{id}/versions/{versionId}

**Deprecated.** By-id reads are kept working during the v1 coexistence window (~1 month). A v1 `versionId` equals its migrated `revisionId`, so this continues to resolve across branches. Migrate to `GET /agent/{id}/branches/{branchId}/revisions/{revisionId}`. Will be removed at the sunset date.

|
Returns the full detail of a specific published version (read-only).
Published versions are config-immutable — to modify config, create a draft from
this version and publish it as a new version.


Reference: https://docs.smallest.ai/voice-agents/api-reference/agent-versioning-versions/get-version-detail

## OpenAPI Specification

```yaml
openapi: 3.1.0
info:
  title: atoms
  version: 1.0.0
paths:
  /agent/{id}/versions/{versionId}:
    get:
      operationId: get-version-detail
      summary: Get version detail
      description: >
        **Deprecated.** By-id reads are kept working during the v1 coexistence
        window (~1 month). A v1 `versionId` equals its migrated `revisionId`, so
        this continues to resolve across branches. Migrate to `GET
        /agent/{id}/branches/{branchId}/revisions/{revisionId}`. Will be removed
        at the sunset date.


        |

        Returns the full detail of a specific published version (read-only).

        Published versions are config-immutable — to modify config, create a
        draft from

        this version and publish it as a new version.
      tags:
        - agentVersioningVersions
      parameters:
        - name: id
          in: path
          description: The agent ID.
          required: true
          schema:
            type: string
        - name: versionId
          in: path
          description: The published version ID
          required: true
          schema:
            type: string
        - name: Authorization
          in: header
          description: >-
            API key from the console ApiKey collection, sent as Bearer token.
            Also accepts session cookies for browser-based auth.
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: >-
                  #/components/schemas/Agent Versioning -
                  Versions_getVersionDetail_Response_200
        '400':
          description: Invalid input
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BadRequestErrorResponse'
        '401':
          description: Unauthorized access
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UnauthorizedErrorResponse'
        '403':
          description: >-
            Forbidden. Returned for workflow_graph agents when the organization
            lacks conversational agents access.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ApiResponse'
        '404':
          description: Agent or version not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BadRequestErrorResponse'
        '500':
          description: Internal server error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/InternalServerErrorResponse'
servers:
  - url: https://api.smallest.ai/atoms/v1
    description: Production server
components:
  schemas:
    AgentVersionStatus:
      type: string
      enum:
        - published
        - draft
        - archived
      description: Current status of the version record
      title: AgentVersionStatus
    AgentVersionBlocks:
      type: object
      properties:
        workflow_prompt:
          type: string
        workflow_tools:
          type: string
        workflow_graph:
          type: string
        llm:
          type: string
        voice:
          type: string
        language:
          type: string
        call_handling:
          type: string
        detection:
          type: string
        analytics:
          type: string
        timeouts:
          type: string
        audio:
          type: string
        privacy:
          type: string
        widget:
          type: string
      description: References to the 13 config section blocks
      title: AgentVersionBlocks
    WorkflowType:
      type: string
      enum:
        - workflow_graph
        - single_prompt
      description: >-
        The type of workflow configuration. workflow_graph uses a node-based
        visual workflow, single_prompt uses a simple prompt-based configuration.
      title: WorkflowType
    AgentVersion:
      type: object
      properties:
        _id:
          type: string
          description: Unique identifier
        agent:
          type: string
          description: The agent this version belongs to
        status:
          $ref: '#/components/schemas/AgentVersionStatus'
          description: Current status of the version record
        versionNumber:
          type:
            - integer
            - 'null'
          description: Auto-incremented version number (published versions only)
        label:
          type:
            - string
            - 'null'
          description: Human-readable label for the version
        description:
          type:
            - string
            - 'null'
          description: Description of what changed in this version
        isPinned:
          type: boolean
          default: false
          description: Whether the version is pinned for quick access
        publishedBy:
          type:
            - string
            - 'null'
          description: User ID of who published this version
        publishedAt:
          type:
            - string
            - 'null'
          format: date-time
          description: When this version was published
        activatedBy:
          type:
            - string
            - 'null'
          description: User ID of who activated this version
        activatedAt:
          type:
            - string
            - 'null'
          format: date-time
          description: When this version was activated
        draftId:
          type:
            - string
            - 'null'
          description: Unique draft identifier (drafts only)
        draftName:
          type:
            - string
            - 'null'
          description: Human-readable draft name
        draftRevision:
          type:
            - integer
            - 'null'
          description: Revision number within the draft (drafts only)
        sourceVersionId:
          type:
            - string
            - 'null'
          description: The published version this draft was branched from
        blocks:
          $ref: '#/components/schemas/AgentVersionBlocks'
          description: References to the 13 config section blocks
        workflowType:
          $ref: '#/components/schemas/WorkflowType'
        parentVersion:
          type:
            - string
            - 'null'
          description: The version this was derived from
        isActive:
          type: boolean
          description: Whether this is the currently active version for the agent
        createdBy:
          type: string
          description: User ID of who created this record
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time
      description: >-
        Represents either a draft revision or a published version of an agent's
        configuration.
      title: AgentVersion
    AgentIdVersionsVersionIdGetResponsesContentApplicationJsonSchemaData:
      type: object
      properties:
        version:
          $ref: '#/components/schemas/AgentVersion'
        resolvedConfig:
          type: object
          additionalProperties:
            description: Any type
          description: Resolved agent configuration keyed by config section.
      title: AgentIdVersionsVersionIdGetResponsesContentApplicationJsonSchemaData
    Agent Versioning - Versions_getVersionDetail_Response_200:
      type: object
      properties:
        status:
          type: boolean
        data:
          $ref: >-
            #/components/schemas/AgentIdVersionsVersionIdGetResponsesContentApplicationJsonSchemaData
      title: Agent Versioning - Versions_getVersionDetail_Response_200
    BadRequestErrorResponse:
      type: object
      properties:
        status:
          type: boolean
        errors:
          type: array
          items:
            type: string
      title: BadRequestErrorResponse
    UnauthorizedErrorResponse:
      type: object
      properties:
        status:
          type: boolean
        errors:
          type: array
          items:
            type: string
      title: UnauthorizedErrorResponse
    ApiResponseData:
      type: object
      properties: {}
      title: ApiResponseData
    ApiResponse:
      type: object
      properties:
        status:
          type: boolean
        data:
          $ref: '#/components/schemas/ApiResponseData'
      title: ApiResponse
    InternalServerErrorResponse:
      type: object
      properties:
        status:
          type: boolean
        errors:
          type: array
          items:
            type: string
      title: InternalServerErrorResponse
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: >-
        API key from the console ApiKey collection, sent as Bearer token. Also
        accepts session cookies for browser-based auth.

```

## Examples



**Request**

```json
{}
```

**Response**

```json
{
  "status": true,
  "data": {
    "version": {
      "_id": "5f8d0d55b54764421b7156c3",
      "agent": "5f8d0d55b54764421b7156a9",
      "status": "published",
      "versionNumber": 3,
      "label": "Initial Release v3",
      "description": "Added new call handling logic and updated voice prompts.",
      "isPinned": true,
      "publishedBy": "user_12345",
      "publishedAt": "2024-01-15T09:30:00Z",
      "activatedBy": "user_12345",
      "activatedAt": "2024-01-15T09:30:00Z",
      "draftId": null,
      "draftName": null,
      "draftRevision": null,
      "sourceVersionId": "5f8d0d55b54764421b7156c1",
      "blocks": {
        "workflow_prompt": "prompt_block_001",
        "workflow_tools": "tools_block_001",
        "workflow_graph": "graph_block_001",
        "llm": "llm_block_001",
        "voice": "voice_block_001",
        "language": "language_block_001",
        "call_handling": "call_handling_block_001",
        "detection": "detection_block_001",
        "analytics": "analytics_block_001",
        "timeouts": "timeouts_block_001",
        "audio": "audio_block_001",
        "privacy": "privacy_block_001",
        "widget": "widget_block_001"
      },
      "workflowType": "workflow_graph",
      "parentVersion": "5f8d0d55b54764421b7156c2",
      "isActive": true,
      "createdBy": "user_12345",
      "createdAt": "2024-01-10T08:00:00Z",
      "updatedAt": "2024-01-15T09:30:00Z"
    },
    "resolvedConfig": {
      "workflow_prompt": {
        "welcomeMessage": "Hello! How can I assist you today?"
      },
      "workflow_tools": {
        "toolA": "enabled",
        "toolB": "disabled"
      },
      "workflow_graph": {
        "nodes": 12,
        "edges": 15
      },
      "llm": {
        "model": "gpt-4",
        "temperature": 0.7
      },
      "voice": {
        "language": "en-US",
        "voiceName": "Joanna"
      },
      "language": {
        "default": "en",
        "supported": [
          "en",
          "es",
          "fr"
        ]
      },
      "call_handling": {
        "maxCallDuration": 3600,
        "voicemailEnabled": true
      },
      "detection": {
        "speechRecognition": "enabled",
        "intentDetection": "enabled"
      },
      "analytics": {
        "trackingId": "UA-12345678-9"
      },
      "timeouts": {
        "responseTimeout": 30,
        "callTimeout": 300
      },
      "audio": {
        "bitrate": 128,
        "format": "mp3"
      },
      "privacy": {
        "dataRetentionDays": 90,
        "encryption": "AES-256"
      },
      "widget": {
        "enabled": true,
        "theme": "dark"
      }
    }
  }
}
```

**SDK Code**

```python
from smallestai import SmallestAI

client = SmallestAI(
    token="YOUR_TOKEN_HERE",
)

client.atoms.agent_versioning_versions.get_version_detail(
    id="id",
    version_id="versionId",
)

```

```javascript
const url = 'https://api.smallest.ai/atoms/v1/agent/id/versions/versionId';
const options = {
  method: 'GET',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.smallest.ai/atoms/v1/agent/id/versions/versionId"

	payload := strings.NewReader("{}")

	req, _ := http.NewRequest("GET", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.smallest.ai/atoms/v1/agent/id/versions/versionId")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{}"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.get("https://api.smallest.ai/atoms/v1/agent/id/versions/versionId")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'https://api.smallest.ai/atoms/v1/agent/id/versions/versionId', [
  'body' => '{}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.smallest.ai/atoms/v1/agent/id/versions/versionId");
var request = new RestRequest(Method.GET);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.smallest.ai/atoms/v1/agent/id/versions/versionId")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```