> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://onepin.ai/docs/reference/api-reference/workflows/create-workflow-api-v-1-workflows-post/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://onepin.ai/_mcp/server.

# Create Workflow

POST https://api.onepin.ai/api/v1/workflows
Content-Type: application/json

Create a new workflow in the current workspace.

Validates the workflow `definition` (graph structure, node types, edge
connectivity) before persisting. Returns 422 with structured details if
the definition fails validation. Requires at least `editor` role in the
workspace; viewers cannot create workflows.

The `definition` contains a `graph` (nodes and edges) and an `execution`
block (ordered step list and execution params). Omitting `definition`
creates a workflow with an empty graph that can be edited later.

`name` is optional. Omit it to get the server-side placeholder
`"Untitled workflow"` (`name_source: "placeholder"`), which the assistant
auto-names from the first message via `POST /workflows/{id}/name/generate`.
An explicit `name` is stored as-is with `name_source: "user"`.

Reference: https://onepin.ai/docs/reference/api-reference/workflows/create-workflow-api-v-1-workflows-post

## Authentication

- `Authorization` header (bearer token, required) — Clerk JWT token
- `Authorization` header (bearer token, required) — Onepin live API key (`op_live_...`). Test and public keys are reserved in Phase 1.

## Servers

- `https://api.onepin.ai` (prod, default)
- `https://dev-api.onepin.ai` (dev)

## Request

### Headers

- `X-Workspace-Id` (string, optional, nullable)

### Body (application/json)

This endpoint expects a WorkflowCreate.

- `name` (string, optional, nullable) — Human-readable workflow name (1–200 characters, non-blank). Omit to create an unnamed workflow that gets a server-side placeholder and is auto-named from the first assistant message.
- `description` (string, optional, nullable) — Optional description shown in the workflow list (max 5000 characters).
- `definition` (WorkflowDefinition-Input, optional) — Graph and execution config. Omit to create an empty workflow.

## Response

### 201

Successful Response

- `data` (WorkflowOut, required)
- `meta` (Meta, required)

## Errors

### 422 Unprocessable Entity Error

Validation Error

- `detail` (list of ValidationError, optional)

## Types

### WorkflowDefinition-Input

- `graph` (GraphDefinition-Input, optional)
- `execution` (ExecutionDefinition, optional)

### WorkflowOut

- `id` (string, required) — Unique workflow identifier.
- `user_id` (string, required) — ID of the user who created the workflow.
- `name` (string, required) — Human-readable workflow name.
- `name_source` (string, required) — How `name` was set: 'placeholder' | 'generated' | 'user'.
- `definition` (map from string to any, required) — Full workflow graph and execution config as stored (config-migrated on read).
- `created_at` (datetime, required) — When the workflow was created (UTC).
- `updated_at` (datetime, required) — When the workflow was last modified (UTC).
- `description` (string, optional, nullable) — Optional workflow description.
- `runs_count` (integer, optional, default: 0) — Total number of runs ever started for this workflow.
- `last_run_at` (datetime, optional, nullable) — When the most recent run was created. Null if never run.
- `last_run_status` (string, optional, nullable) — Raw RunStatus of the most recent run. One of: `pending`, `running`, `completed`, `failed`, `cancelled`, `paused`. Null if never run.
- `run_status_counts` (RunStatusCounts, optional) — Number of runs per raw RunStatus, computed over ALL runs of this workflow (same population as `runs_count`; NOT affected by the list-level `status` filter). The sum of all values equals `runs_count`; statuses with no runs are 0.

### Meta

- `request_id` (string, required)
- `timestamp` (datetime, required)

### ValidationError

- `loc` (list of ValidationErrorLocItems, required)
- `msg` (string, required)
- `type` (string, required)
- `input` (any, optional)
- `ctx` (ValidationErrorCtx, optional)

### GraphDefinition-Input

- `nodes` (list of GraphNode, optional)
- `edges` (list of GraphEdge, optional)

### ExecutionDefinition

- `steps` (list of string, optional)
- `params` (map from string to any, optional)

### RunStatusCounts

Per-raw-`RunStatus` run counts for a workflow. Computed over ALL runs of the workflow — the same population as `runs_count` — so it is NOT affected by the list-level `status` filter. Every raw status is always present; a status with no runs is `0`. The sum of all fields equals `runs_count`, and each field matches the `pagination.total` of `GET /workflows/{id}/runs?status=<status>`. These are RAW status counts (not the UI-derived `WorkflowListStatus` buckets), so the caller can group them per tab.

- `pending` (integer, optional, default: 0) — Runs queued but not yet started.
- `running` (integer, optional, default: 0) — Runs currently executing.
- `completed` (integer, optional, default: 0) — Runs that finished successfully.
- `failed` (integer, optional, default: 0) — Runs that ended in a failure state.
- `cancelled` (integer, optional, default: 0) — Runs explicitly cancelled by a user.
- `paused` (integer, optional, default: 0) — Runs currently paused/parked.

### ValidationErrorLocItems

### ValidationErrorCtx

### GraphNode

- `id` (string, required)
- `type` (enum, required)
  - Allowed values: `source_script`, `operator_translator`, `operator_normalizer`, `operator_generator`, `operator_phoneme_injector`, `sink_preview`, `validator_error_rate`, `validator_naturalness`, `validator_noise`, `validator_pronunciation`, `operator_pronunciation_corrector`
- `position` (NodePosition, required)
- `name` (string, optional, nullable)
- `config` (map from string to any, optional)
- `config_version` (integer, optional, default: 1)

### GraphEdge

- `id` (string, required)
- `source` (string, required)
- `sourcePort` (string, required)
- `target` (string, required)
- `targetPort` (string, required)

### NodePosition

- `x` (double, required)
- `y` (double, required)

## Examples

**Request**

```json
{}
```

**Response**

```json
{
  "data": {
    "id": "string",
    "user_id": "string",
    "name": "string",
    "name_source": "string",
    "definition": {},
    "created_at": "2024-01-15T09:30:00Z",
    "updated_at": "2024-01-15T09:30:00Z",
    "description": "string",
    "runs_count": 0,
    "last_run_at": "2024-01-15T09:30:00Z",
    "last_run_status": "string",
    "run_status_counts": {
      "pending": 0,
      "running": 0,
      "completed": 0,
      "failed": 0,
      "cancelled": 0,
      "paused": 0
    }
  },
  "meta": {
    "request_id": "string",
    "timestamp": "2024-01-15T09:30:00Z"
  }
}
```

**SDK Code**

```python
import requests

url = "https://api.onepin.ai/api/v1/workflows"

payload = {}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.json())
```

```javascript
const url = 'https://api.onepin.ai/api/v1/workflows';
const options = {
  method: 'POST',
  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.onepin.ai/api/v1/workflows"

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

	req, _ := http.NewRequest("POST", 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.onepin.ai/api/v1/workflows")

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

request = Net::HTTP::Post.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.post("https://api.onepin.ai/api/v1/workflows")
  .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('POST', 'https://api.onepin.ai/api/v1/workflows', [
  'body' => '{}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

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

```csharp
using RestSharp;

var client = new RestClient("https://api.onepin.ai/api/v1/workflows");
var request = new RestRequest(Method.POST);
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.onepin.ai/api/v1/workflows")! 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()
```

> Onepin is a voice workflow platform that orchestrates, validates, and ships production-ready audio across 33 TTS models.