> 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/ollama/test-connection/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://www.comet.com/_mcp/server.

# Test connection to Ollama instance

POST http://localhost:5173/api/v1/private/ollama/test-connection
Content-Type: application/json

Validates that the provided Ollama URL is reachable. URL may be provided with or without /v1 suffix (e.g., http://localhost:11434 or http://localhost:11434/v1). The /v1 suffix will be automatically removed for connection testing. For inference, use the URL with /v1 suffix.

Reference: https://www.comet.com/docs/opik/reference/rest-api/ollama/test-connection

## Servers

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

## Request

### Body (application/json)

This endpoint expects an OllamaInstanceBaseUrlRequest.

- `base_url` (string, required) — Base URL of the Ollama instance. May include /v1 suffix which will be automatically removed for connection testing. For inference, use the URL with /v1 suffix for OpenAI-compatible endpoints.
- `api_key` (string, optional) — Optional API key for authenticated Ollama instances. If provided, will be sent as Bearer token in Authorization header.

## Response

### 200

Connection test successful

- `connected` (boolean, optional) — Whether the connection was successful
- `version` (string, optional) — Server version (returned even if connection failed or version is incompatible)
- `error_message` (string, optional) — Error message if connection failed

## Errors

### 422 Unprocessable Entity Error

Unprocessable Content - Invalid URL format

- `code` (integer, optional)
- `message` (string, optional)
- `details` (string, optional)

### 502 Bad Gateway Error

Connection test failed - Ollama instance unreachable

- `connected` (boolean, optional) — Whether the connection was successful
- `version` (string, optional) — Server version (returned even if connection failed or version is incompatible)
- `error_message` (string, optional) — Error message if connection failed

### 503 Service Unavailable Error

Ollama provider is disabled

- `code` (integer, optional)
- `message` (string, optional)
- `details` (string, optional)

## Examples

**Request**

```json
{
  "base_url": "http://localhost:11434/v1"
}
```

**Response**

```json
{
  "connected": true,
  "version": "string",
  "error_message": "string"
}
```

**SDK Code**

```python
import requests

url = "http://localhost:5173/api/v1/private/ollama/test-connection"

payload = { "base_url": "http://localhost:11434/v1" }
headers = {"Content-Type": "application/json"}

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

print(response.json())
```

```javascript
const url = 'http://localhost:5173/api/v1/private/ollama/test-connection';
const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: '{"base_url":"http://localhost:11434/v1"}'
};

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/ollama/test-connection"

	payload := strings.NewReader("{\n  \"base_url\": \"http://localhost:11434/v1\"\n}")

	req, _ := http.NewRequest("POST", 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/ollama/test-connection")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"base_url\": \"http://localhost:11434/v1\"\n}"

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.post("http://localhost:5173/api/v1/private/ollama/test-connection")
  .header("Content-Type", "application/json")
  .body("{\n  \"base_url\": \"http://localhost:11434/v1\"\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'http://localhost:5173/api/v1/private/ollama/test-connection', [
  'body' => '{
  "base_url": "http://localhost:11434/v1"
}',
  'headers' => [
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("http://localhost:5173/api/v1/private/ollama/test-connection");
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"base_url\": \"http://localhost:11434/v1\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Content-Type": "application/json"]
let parameters = ["base_url": "http://localhost:11434/v1"] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "http://localhost:5173/api/v1/private/ollama/test-connection")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
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()
```

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