> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.withverifa.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.withverifa.com/_mcp/server.

# Dry-run a workflow draft

POST https://api.withverifa.com/api/v1/workflows/{workflow_id}/drafts/{draft_id}/dry-run
Content-Type: application/json

Simulates the draft's graph against a sandbox preset and returns
per-node step results. Optionally accepts an inline `graph` to run
instead of the stored draft graph.

**Required scope:** `workflows:read`


Reference: https://docs.withverifa.com/api-reference/workflows/dry-run-workflow-draft

## Authentication

- `X-API-Key` header (required) — Organization API key. Keys are prefixed with `vk_live_` (production) or `vk_sandbox_` (sandbox).

## Request

### Path parameters

- `workflow_id` (string, required)
- `draft_id` (string, required)

### Headers

- `Verifa-Version` (date, optional) — API version date string (e.g. `2026-02-01`). If omitted, the version pinned to your API key is used.
- `Key-Inflection` (enum, optional, default: snake) — Response key casing. Defaults to `snake`.
  - Allowed values: `camel`, `kebab`, `snake`
- `Idempotency-Key` (string, optional) — Unique key for idempotent requests. Cached for 24 hours. Sending the same key with different parameters returns `422`.

### Body (application/json)

This endpoint expects a DryRunRequest.

- `preset` (string, required) — Sandbox preset name that drives the simulated responses.
- `graph` (map from string to any, optional, nullable) — Optional inline graph to simulate instead of the stored one.

## Response

### 200

Dry-run result.

- `steps` (list of DryRunResultStepsItems, optional)
- `preset` (string, optional)
- `preset_description` (string, optional)

## Errors

### 401 Unauthorized Error

Missing or invalid API key.

- `error` (string, required) — Short error code.
- `status_code` (integer, required) — HTTP status code.
- `detail` (string, optional) — Human-readable error description.

### 404 Not Found Error

Resource not found.

- `error` (string, required) — Short error code.
- `status_code` (integer, required) — HTTP status code.
- `detail` (string, optional) — Human-readable error description.

### 422 Unprocessable Entity Error

Request validation failed.

- `error` (string, required) — Short error code.
- `status_code` (integer, required) — HTTP status code.
- `detail` (string, optional) — Human-readable error description.

## Types

### DryRunResultStepsItems

- `node_id` (string, optional)
- `node_type` (string, optional)
- `policy` (string, optional, nullable)
- `status` (string, optional)
- `passed` (boolean, optional, nullable)
- `details` (map from string to any, optional)
- `duration_ms` (integer, optional, nullable)
- `routed_to` (string, optional, nullable)
- `outcome` (string, optional, nullable)

## Examples

**Request**

```json
{
  "preset": "string"
}
```

**Response**

```json
{
  "steps": [
    {
      "node_id": "string",
      "node_type": "string",
      "policy": "string",
      "status": "string",
      "passed": true,
      "details": {},
      "duration_ms": 1,
      "routed_to": "string",
      "outcome": "string"
    }
  ],
  "preset": "string",
  "preset_description": "string"
}
```

**SDK Code**

```python
import requests

url = "https://api.withverifa.com/api/v1/workflows/workflow_id/drafts/draft_id/dry-run"

payload = { "preset": "string" }
headers = {
    "X-API-Key": "<apiKey>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://api.withverifa.com/api/v1/workflows/workflow_id/drafts/draft_id/dry-run';
const options = {
  method: 'POST',
  headers: {'X-API-Key': '<apiKey>', 'Content-Type': 'application/json'},
  body: '{"preset":"string"}'
};

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.withverifa.com/api/v1/workflows/workflow_id/drafts/draft_id/dry-run"

	payload := strings.NewReader("{\n  \"preset\": \"string\"\n}")

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

	req.Header.Add("X-API-Key", "<apiKey>")
	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.withverifa.com/api/v1/workflows/workflow_id/drafts/draft_id/dry-run")

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

request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<apiKey>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"preset\": \"string\"\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("https://api.withverifa.com/api/v1/workflows/workflow_id/drafts/draft_id/dry-run")
  .header("X-API-Key", "<apiKey>")
  .header("Content-Type", "application/json")
  .body("{\n  \"preset\": \"string\"\n}")
  .asString();
```

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

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.withverifa.com/api/v1/workflows/workflow_id/drafts/draft_id/dry-run', [
  'body' => '{
  "preset": "string"
}',
  'headers' => [
    'Content-Type' => 'application/json',
    'X-API-Key' => '<apiKey>',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.withverifa.com/api/v1/workflows/workflow_id/drafts/draft_id/dry-run");
var request = new RestRequest(Method.POST);
request.AddHeader("X-API-Key", "<apiKey>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"preset\": \"string\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "X-API-Key": "<apiKey>",
  "Content-Type": "application/json"
]
let parameters = ["preset": "string"] as [String : Any]

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

let request = NSMutableURLRequest(url: NSURL(string: "https://api.withverifa.com/api/v1/workflows/workflow_id/drafts/draft_id/dry-run")! 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()
```