> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://www.comet.com/docs/opik/reference/rest-api/prompts/get-prompt-version-by-number/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://www.comet.com/_mcp/server.

# Get prompt version by sequential number

GET http://localhost:5173/api/v1/private/prompts/{promptId}/versions/by-number/{versionNumber}

Get a prompt version by its sequential v\<N> number for the given prompt.

Reference: https://www.comet.com/docs/opik/reference/rest-api/prompts/get-prompt-version-by-number

## Servers

- `http://localhost:5173/api` (Local server, default)
- `https://www.comet.com/opik/api` (Opik Cloud)

## Request

### Path parameters

- `promptId` (string, required)
- `versionNumber` (string, required)

## Response

### 200

Prompt version resource

- `template` (string, required)
- `id` (string, optional) — version unique identifier, generated if absent
- `prompt_id` (string, optional)
- `commit` (string, optional) — version short unique identifier, generated if absent. it must be 8 characters long
- `version_number` (string, optional) — sequential version number in the format v\<N>; null for masks
- `metadata` (JsonNode_Detail, optional)
- `type` (enum, optional)
  - Allowed values: `mustache`, `jinja2`, `python`
- `version_type` (enum, optional) — version type discriminator; defaults to prompt_version
  - Allowed values: `prompt_version`, `mask`
- `environments` (list of string, optional)
- `change_description` (string, optional)
- `tags` (list of string, optional)
- `variables` (list of string, optional)
- `template_structure` (enum, optional)
  - Allowed values: `text`, `chat`
- `created_at` (datetime, optional)
- `created_by` (string, optional)
- `environment` (string, optional, deprecated) — Deprecated: use 'environments' instead

## Errors

### 400 Bad Request Error

Bad Request

- `errors` (list of string, optional)

### 404 Not Found Error

Not Found

- `errors` (list of string, optional)

## Types

### JsonNode_Detail

## Examples

**Request**

```json
{}
```

**Response**

```json
{
  "template": "Hello {{user}}, welcome to the platform! Your role is {{role}}.",
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "prompt_id": "7c9e6679-7425-40de-944b-e07fc1f90ae7",
  "commit": "a1b2c3d4",
  "version_number": "v3",
  "metadata": {
    "description": "Initial greeting template",
    "language": "en"
  },
  "type": "mustache",
  "version_type": "prompt_version",
  "environments": [
    "production",
    "staging"
  ],
  "change_description": "Updated greeting to include user role",
  "tags": [
    "welcome",
    "user-greeting"
  ],
  "variables": [
    "user",
    "role"
  ],
  "template_structure": "text",
  "created_at": "2024-01-15T09:30:00Z",
  "created_by": "jane.doe@example.com",
  "environment": "production"
}
```

**SDK Code**

```python
import requests

url = "http://localhost:5173/api/v1/private/prompts/promptId/versions/by-number/versionNumber"

payload = {}
headers = {"Content-Type": "application/json"}

response = requests.get(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'http://localhost:5173/api/v1/private/prompts/promptId/versions/by-number/versionNumber';
const options = {method: 'GET', headers: {'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 := "http://localhost:5173/api/v1/private/prompts/promptId/versions/by-number/versionNumber"

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

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

	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("http://localhost:5173/api/v1/private/prompts/promptId/versions/by-number/versionNumber")

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

request = Net::HTTP::Get.new(url)
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("http://localhost:5173/api/v1/private/prompts/promptId/versions/by-number/versionNumber")
  .header("Content-Type", "application/json")
  .body("{}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('GET', 'http://localhost:5173/api/v1/private/prompts/promptId/versions/by-number/versionNumber', [
  'body' => '{}',
  'headers' => [
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("http://localhost:5173/api/v1/private/prompts/promptId/versions/by-number/versionNumber");
var request = new RestRequest(Method.GET);
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Content-Type": "application/json"]
let parameters = [] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "http://localhost:5173/api/v1/private/prompts/promptId/versions/by-number/versionNumber")! 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()
```

> Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.