Create a workflow

curl --request POST \
  --url https://api.hitl.sh/v1/api/workflows \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "Refund approval",
  "description": "A support lead approves or denies refunds.",
  "nodes": [
    {
      "id": "trigger-1",
      "type": "trigger",
      "position": {
        "x": 0,
        "y": 0
      },
      "data": {
        "triggerType": "webhook"
      }
    },
    {
      "id": "review-1",
      "type": "review",
      "position": {
        "x": 0,
        "y": 200
      },
      "data": {
        "label": "Approve refund",
        "requestText": "Refund ${{trigger.body.amount}} to {{trigger.body.customer.name}}?",
        "responseType": "single_select",
        "priority": "high",
        "timeout": "7200",
        "responseConfig": {
          "options": [
            {
              "value": "approve",
              "label": "Approve refund"
            },
            {
              "value": "deny",
              "label": "Deny"
            }
          ],
          "required": true
        }
      }
    },
    {
      "id": "end-1",
      "type": "end",
      "position": {
        "x": 0,
        "y": 400
      },
      "data": {
        "label": "End"
      }
    }
  ],
  "edges": [
    {
      "id": "e1",
      "source": "trigger-1",
      "target": "review-1"
    },
    {
      "id": "e2",
      "source": "review-1",
      "target": "end-1"
    }
  ]
}
'

import requests

url = "https://api.hitl.sh/v1/api/workflows"

payload = {
    "name": "Refund approval",
    "description": "A support lead approves or denies refunds.",
    "nodes": [
        {
            "id": "trigger-1",
            "type": "trigger",
            "position": {
                "x": 0,
                "y": 0
            },
            "data": { "triggerType": "webhook" }
        },
        {
            "id": "review-1",
            "type": "review",
            "position": {
                "x": 0,
                "y": 200
            },
            "data": {
                "label": "Approve refund",
                "requestText": "Refund ${{trigger.body.amount}} to {{trigger.body.customer.name}}?",
                "responseType": "single_select",
                "priority": "high",
                "timeout": "7200",
                "responseConfig": {
                    "options": [
                        {
                            "value": "approve",
                            "label": "Approve refund"
                        },
                        {
                            "value": "deny",
                            "label": "Deny"
                        }
                    ],
                    "required": True
                }
            }
        },
        {
            "id": "end-1",
            "type": "end",
            "position": {
                "x": 0,
                "y": 400
            },
            "data": { "label": "End" }
        }
    ],
    "edges": [
        {
            "id": "e1",
            "source": "trigger-1",
            "target": "review-1"
        },
        {
            "id": "e2",
            "source": "review-1",
            "target": "end-1"
        }
    ]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    name: 'Refund approval',
    description: 'A support lead approves or denies refunds.',
    nodes: [
      {
        id: 'trigger-1',
        type: 'trigger',
        position: {x: 0, y: 0},
        data: {triggerType: 'webhook'}
      },
      {
        id: 'review-1',
        type: 'review',
        position: {x: 0, y: 200},
        data: {
          label: 'Approve refund',
          requestText: 'Refund ${{trigger.body.amount}} to {{trigger.body.customer.name}}?',
          responseType: 'single_select',
          priority: 'high',
          timeout: '7200',
          responseConfig: {
            options: [{value: 'approve', label: 'Approve refund'}, {value: 'deny', label: 'Deny'}],
            required: true
          }
        }
      },
      {id: 'end-1', type: 'end', position: {x: 0, y: 400}, data: {label: 'End'}}
    ],
    edges: [
      {id: 'e1', source: 'trigger-1', target: 'review-1'},
      {id: 'e2', source: 'review-1', target: 'end-1'}
    ]
  })
};

fetch('https://api.hitl.sh/v1/api/workflows', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.hitl.sh/v1/api/workflows",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'name' => 'Refund approval',
    'description' => 'A support lead approves or denies refunds.',
    'nodes' => [
        [
                'id' => 'trigger-1',
                'type' => 'trigger',
                'position' => [
                                'x' => 0,
                                'y' => 0
                ],
                'data' => [
                                'triggerType' => 'webhook'
                ]
        ],
        [
                'id' => 'review-1',
                'type' => 'review',
                'position' => [
                                'x' => 0,
                                'y' => 200
                ],
                'data' => [
                                'label' => 'Approve refund',
                                'requestText' => 'Refund ${{trigger.body.amount}} to {{trigger.body.customer.name}}?',
                                'responseType' => 'single_select',
                                'priority' => 'high',
                                'timeout' => '7200',
                                'responseConfig' => [
                                                                'options' => [
                                                                                                                                [
                                                                                                                                                                                                                                                                'value' => 'approve',
                                                                                                                                                                                                                                                                'label' => 'Approve refund'
                                                                                                                                ],
                                                                                                                                [
                                                                                                                                                                                                                                                                'value' => 'deny',
                                                                                                                                                                                                                                                                'label' => 'Deny'
                                                                                                                                ]
                                                                ],
                                                                'required' => true
                                ]
                ]
        ],
        [
                'id' => 'end-1',
                'type' => 'end',
                'position' => [
                                'x' => 0,
                                'y' => 400
                ],
                'data' => [
                                'label' => 'End'
                ]
        ]
    ],
    'edges' => [
        [
                'id' => 'e1',
                'source' => 'trigger-1',
                'target' => 'review-1'
        ],
        [
                'id' => 'e2',
                'source' => 'review-1',
                'target' => 'end-1'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.hitl.sh/v1/api/workflows"

	payload := strings.NewReader("{\n  \"name\": \"Refund approval\",\n  \"description\": \"A support lead approves or denies refunds.\",\n  \"nodes\": [\n    {\n      \"id\": \"trigger-1\",\n      \"type\": \"trigger\",\n      \"position\": {\n        \"x\": 0,\n        \"y\": 0\n      },\n      \"data\": {\n        \"triggerType\": \"webhook\"\n      }\n    },\n    {\n      \"id\": \"review-1\",\n      \"type\": \"review\",\n      \"position\": {\n        \"x\": 0,\n        \"y\": 200\n      },\n      \"data\": {\n        \"label\": \"Approve refund\",\n        \"requestText\": \"Refund ${{trigger.body.amount}} to {{trigger.body.customer.name}}?\",\n        \"responseType\": \"single_select\",\n        \"priority\": \"high\",\n        \"timeout\": \"7200\",\n        \"responseConfig\": {\n          \"options\": [\n            {\n              \"value\": \"approve\",\n              \"label\": \"Approve refund\"\n            },\n            {\n              \"value\": \"deny\",\n              \"label\": \"Deny\"\n            }\n          ],\n          \"required\": true\n        }\n      }\n    },\n    {\n      \"id\": \"end-1\",\n      \"type\": \"end\",\n      \"position\": {\n        \"x\": 0,\n        \"y\": 400\n      },\n      \"data\": {\n        \"label\": \"End\"\n      }\n    }\n  ],\n  \"edges\": [\n    {\n      \"id\": \"e1\",\n      \"source\": \"trigger-1\",\n      \"target\": \"review-1\"\n    },\n    {\n      \"id\": \"e2\",\n      \"source\": \"review-1\",\n      \"target\": \"end-1\"\n    }\n  ]\n}")

	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(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.hitl.sh/v1/api/workflows")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"Refund approval\",\n  \"description\": \"A support lead approves or denies refunds.\",\n  \"nodes\": [\n    {\n      \"id\": \"trigger-1\",\n      \"type\": \"trigger\",\n      \"position\": {\n        \"x\": 0,\n        \"y\": 0\n      },\n      \"data\": {\n        \"triggerType\": \"webhook\"\n      }\n    },\n    {\n      \"id\": \"review-1\",\n      \"type\": \"review\",\n      \"position\": {\n        \"x\": 0,\n        \"y\": 200\n      },\n      \"data\": {\n        \"label\": \"Approve refund\",\n        \"requestText\": \"Refund ${{trigger.body.amount}} to {{trigger.body.customer.name}}?\",\n        \"responseType\": \"single_select\",\n        \"priority\": \"high\",\n        \"timeout\": \"7200\",\n        \"responseConfig\": {\n          \"options\": [\n            {\n              \"value\": \"approve\",\n              \"label\": \"Approve refund\"\n            },\n            {\n              \"value\": \"deny\",\n              \"label\": \"Deny\"\n            }\n          ],\n          \"required\": true\n        }\n      }\n    },\n    {\n      \"id\": \"end-1\",\n      \"type\": \"end\",\n      \"position\": {\n        \"x\": 0,\n        \"y\": 400\n      },\n      \"data\": {\n        \"label\": \"End\"\n      }\n    }\n  ],\n  \"edges\": [\n    {\n      \"id\": \"e1\",\n      \"source\": \"trigger-1\",\n      \"target\": \"review-1\"\n    },\n    {\n      \"id\": \"e2\",\n      \"source\": \"review-1\",\n      \"target\": \"end-1\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.hitl.sh/v1/api/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 = "{\n  \"name\": \"Refund approval\",\n  \"description\": \"A support lead approves or denies refunds.\",\n  \"nodes\": [\n    {\n      \"id\": \"trigger-1\",\n      \"type\": \"trigger\",\n      \"position\": {\n        \"x\": 0,\n        \"y\": 0\n      },\n      \"data\": {\n        \"triggerType\": \"webhook\"\n      }\n    },\n    {\n      \"id\": \"review-1\",\n      \"type\": \"review\",\n      \"position\": {\n        \"x\": 0,\n        \"y\": 200\n      },\n      \"data\": {\n        \"label\": \"Approve refund\",\n        \"requestText\": \"Refund ${{trigger.body.amount}} to {{trigger.body.customer.name}}?\",\n        \"responseType\": \"single_select\",\n        \"priority\": \"high\",\n        \"timeout\": \"7200\",\n        \"responseConfig\": {\n          \"options\": [\n            {\n              \"value\": \"approve\",\n              \"label\": \"Approve refund\"\n            },\n            {\n              \"value\": \"deny\",\n              \"label\": \"Deny\"\n            }\n          ],\n          \"required\": true\n        }\n      }\n    },\n    {\n      \"id\": \"end-1\",\n      \"type\": \"end\",\n      \"position\": {\n        \"x\": 0,\n        \"y\": 400\n      },\n      \"data\": {\n        \"label\": \"End\"\n      }\n    }\n  ],\n  \"edges\": [\n    {\n      \"id\": \"e1\",\n      \"source\": \"trigger-1\",\n      \"target\": \"review-1\"\n    },\n    {\n      \"id\": \"e2\",\n      \"source\": \"review-1\",\n      \"target\": \"end-1\"\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "error": false,
  "msg": "Workflow created",
  "data": {
    "id": "6af2ce4e8207961501f59472",
    "name": "Refund approval",
    "description": "A support lead approves, denies or escalates refunds over $100.",
    "status": "draft",
    "trigger": {
      "type": "webhook",
      "webhook_id": "wf_26db308d0ea2bfd5427999311a169b3b"
    },
    "steps": 6,
    "has_review": true,
    "runnable": false,
    "execution_count": 0,
    "last_executed_at": null,
    "created_at": "2026-11-10T07:57:02.477Z",
    "updated_at": "2026-11-10T07:57:05.452Z"
  }
}

{
  "error": true,
  "msg": "Invalid execution id"
}

{
  "error": true,
  "msg": "Invalid API key"
}

{
  "error": true,
  "code": "confirmation_required",
  "msg": "Confirm the signup first: ask your human for the code in the email"
}