# Run the built-in sandbox runtime self-test

POST https://api.chaser.sh/v1/sessions/{id}/self-test

Execute a built-in diagnostic inside an existing sandbox session and return structured runtime details for troubleshooting PTY/exec/MCP environment parity.

Reference: https://docs.chaser.sh/api-reference/chaser-core-api/sessions/self-test-session

## OpenAPI Specification

```yaml
openapi: 3.1.0
info:
  title: Chaser Core API
  version: 1.0.0
paths:
  /v1/sessions/{id}/self-test:
    post:
      operationId: self-test-session
      summary: Run the built-in sandbox runtime self-test
      description: >-
        Execute a built-in diagnostic inside an existing sandbox session and
        return structured runtime details for troubleshooting PTY/exec/MCP
        environment parity.
      tags:
        - subpackage_sessions
      parameters:
        - name: id
          in: path
          description: Session ID
          required: true
          schema:
            type: string
        - name: Authorization
          in: header
          description: Bearer authentication
          required: true
          schema:
            type: string
      responses:
        '200':
          description: Sandbox runtime self-test completed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SessionSelfTestResponse'
        '400':
          description: Invalid request or non-sandbox session
          content:
            application/json:
              schema:
                description: Any type
        '404':
          description: Session not found
          content:
            application/json:
              schema:
                description: Any type
servers:
  - url: https://api.chaser.sh
  - url: http://localhost:8000
components:
  schemas:
    SessionRuntimeChaserInfo:
      type: object
      properties:
        agent_brief_path:
          type:
            - string
            - 'null'
        agent_impl:
          type:
            - string
            - 'null'
        image:
          type:
            - string
            - 'null'
        runtime_env:
          type:
            - string
            - 'null'
        session_id:
          type:
            - string
            - 'null'
        toolchain_attached:
          type: boolean
        toolchain_root:
          type:
            - string
            - 'null'
        workspace_id:
          type:
            - string
            - 'null'
        workspace_root:
          type:
            - string
            - 'null'
      required:
        - toolchain_attached
      title: SessionRuntimeChaserInfo
    SessionRuntimeProxyInfo:
      type: object
      properties:
        all_proxy:
          type:
            - string
            - 'null'
        http_proxy:
          type:
            - string
            - 'null'
        https_proxy:
          type:
            - string
            - 'null'
        no_proxy:
          type:
            - string
            - 'null'
      title: SessionRuntimeProxyInfo
    SessionRuntimeToolVersionsInfo:
      type: object
      properties:
        bun:
          type:
            - string
            - 'null'
        cargo:
          type:
            - string
            - 'null'
        git:
          type:
            - string
            - 'null'
        go:
          type:
            - string
            - 'null'
        node:
          type:
            - string
            - 'null'
        python3:
          type:
            - string
            - 'null'
        rustc:
          type:
            - string
            - 'null'
      title: SessionRuntimeToolVersionsInfo
    SessionRuntimeToolsInfo:
      type: object
      properties:
        bun:
          type:
            - string
            - 'null'
        cargo:
          type:
            - string
            - 'null'
        git:
          type:
            - string
            - 'null'
        go:
          type:
            - string
            - 'null'
        node:
          type:
            - string
            - 'null'
        python3:
          type:
            - string
            - 'null'
        rustc:
          type:
            - string
            - 'null'
      title: SessionRuntimeToolsInfo
    SessionRuntimeInfo:
      type: object
      properties:
        chaser:
          $ref: '#/components/schemas/SessionRuntimeChaserInfo'
        chaser_agent:
          type: boolean
        chaser_exec:
          type: boolean
        chaser_mode:
          type:
            - string
            - 'null'
        cwd:
          type: string
        home:
          type: string
        lang:
          type:
            - string
            - 'null'
        path:
          type: string
        path_entries:
          type: array
          items:
            type: string
        proxy:
          $ref: '#/components/schemas/SessionRuntimeProxyInfo'
        shell:
          type:
            - string
            - 'null'
        term:
          type:
            - string
            - 'null'
        tool_versions:
          $ref: '#/components/schemas/SessionRuntimeToolVersionsInfo'
        tools:
          $ref: '#/components/schemas/SessionRuntimeToolsInfo'
        user:
          type: string
        workspace_root_present:
          type: boolean
      required:
        - chaser
        - chaser_agent
        - chaser_exec
        - cwd
        - home
        - path
        - path_entries
        - proxy
        - tool_versions
        - tools
        - user
        - workspace_root_present
      title: SessionRuntimeInfo
    SessionSelfTestResponse:
      type: object
      properties:
        kind:
          type: string
        runtime:
          $ref: '#/components/schemas/SessionRuntimeInfo'
        session_id:
          type: string
        status:
          type: string
        workspace_id:
          type:
            - string
            - 'null'
      required:
        - kind
        - runtime
        - session_id
        - status
      title: SessionSelfTestResponse
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer

```

## SDK Code Examples

```python
import requests

url = "https://api.chaser.sh/v1/sessions/id/self-test"

headers = {"Authorization": "Bearer <token>"}

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

print(response.json())
```

```javascript
const url = 'https://api.chaser.sh/v1/sessions/id/self-test';
const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

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"
	"net/http"
	"io"
)

func main() {

	url := "https://api.chaser.sh/v1/sessions/id/self-test"

	req, _ := http.NewRequest("POST", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

	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.chaser.sh/v1/sessions/id/self-test")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'

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("https://api.chaser.sh/v1/sessions/id/self-test")
  .header("Authorization", "Bearer <token>")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.chaser.sh/v1/sessions/id/self-test', [
  'headers' => [
    'Authorization' => 'Bearer <token>',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.chaser.sh/v1/sessions/id/self-test");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Authorization": "Bearer <token>"]

let request = NSMutableURLRequest(url: NSURL(string: "https://api.chaser.sh/v1/sessions/id/self-test")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers

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()
```