curl --request POST \
  --url https://sandbox.voice.miraiminds.co/v2/agents/flow/validate \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "nodes": [
    {
      "id": "persona",
      "type": "globalNode",
      "data": {
        "name": "Persona and rules",
        "prompt": "You are Ashu, a service advisor at Mirai Motors.\nSpeak everyday Hindi in Devanagari; common English words such as service, slot and workshop are fine.\nSay one or two short sentences, then listen.\nNever promise a discount, a price or a pickup.\nWhen the condition of one of your functions is met, call it at once without saying anything first."
      }
    },
    {
      "id": "identity",
      "type": "startCall",
      "data": {
        "name": "Confirm the customer",
        "greeting": "नमस्ते, मैं मिराई मोटर्स से आशु बोल रहा हूं. क्या मेरी बात {{name}} जी से हो रही है?",
        "prompt": "You have asked whether you are speaking with {{name}}. Wait for the answer.\nIf they confirm, call confirmed_identity.\nIf it is someone else or a wrong number, call wrong_person.\nDo not mention the car or the service before they confirm."
      }
    },
    {
      "id": "offer_slot",
      "type": "agentNode",
      "data": {
        "name": "Book the service",
        "prompt": "Tell them their {{vehicle}} is due for service on {{due_date}}, and ask which day they can bring it to the workshop.\nWhen they name a day, read it back once and call slot_booked.\nIf they do not want to book now, call not_now.",
        "extraction_enabled": true,
        "extraction_variables": [
          {
            "name": "preferred_day",
            "type": "string",
            "prompt": "The day the customer chose for the service, in their words, for example Saturday or 20 August."
          }
        ]
      }
    },
    {
      "id": "goodbye",
      "type": "endCall",
      "data": {
        "name": "Close",
        "prompt": "In one sentence, repeat what was agreed. Thank them and say goodbye. Do not ask anything else.",
        "allow_interrupt": false
      }
    },
    {
      "id": "not_customer",
      "type": "endCall",
      "data": {
        "name": "Wrong person",
        "prompt": "Apologise for the trouble and say goodbye. Do not mention the car or the service."
      }
    }
  ],
  "edges": [
    {
      "id": "e1",
      "source": "identity",
      "target": "offer_slot",
      "data": {
        "label": "confirmed_identity",
        "condition": "The caller confirmed they are the customer you asked for."
      }
    },
    {
      "id": "e2",
      "source": "identity",
      "target": "not_customer",
      "data": {
        "label": "wrong_person",
        "condition": "The caller is someone else, or says it is a wrong number."
      }
    },
    {
      "id": "e3",
      "source": "offer_slot",
      "target": "goodbye",
      "data": {
        "label": "slot_booked",
        "condition": "The customer named a day for the service and you read it back."
      }
    },
    {
      "id": "e4",
      "source": "offer_slot",
      "target": "goodbye",
      "data": {
        "label": "not_now",
        "condition": "The customer does not want to book the service now."
      }
    }
  ]
}
'

import requests

url = "https://sandbox.voice.miraiminds.co/v2/agents/flow/validate"

payload = {
    "nodes": [
        {
            "id": "persona",
            "type": "globalNode",
            "data": {
                "name": "Persona and rules",
                "prompt": "You are Ashu, a service advisor at Mirai Motors.
Speak everyday Hindi in Devanagari; common English words such as service, slot and workshop are fine.
Say one or two short sentences, then listen.
Never promise a discount, a price or a pickup.
When the condition of one of your functions is met, call it at once without saying anything first."
            }
        },
        {
            "id": "identity",
            "type": "startCall",
            "data": {
                "name": "Confirm the customer",
                "greeting": "नमस्ते, मैं मिराई मोटर्स से आशु बोल रहा हूं. क्या मेरी बात {{name}} जी से हो रही है?",
                "prompt": "You have asked whether you are speaking with {{name}}. Wait for the answer.
If they confirm, call confirmed_identity.
If it is someone else or a wrong number, call wrong_person.
Do not mention the car or the service before they confirm."
            }
        },
        {
            "id": "offer_slot",
            "type": "agentNode",
            "data": {
                "name": "Book the service",
                "prompt": "Tell them their {{vehicle}} is due for service on {{due_date}}, and ask which day they can bring it to the workshop.
When they name a day, read it back once and call slot_booked.
If they do not want to book now, call not_now.",
                "extraction_enabled": True,
                "extraction_variables": [
                    {
                        "name": "preferred_day",
                        "type": "string",
                        "prompt": "The day the customer chose for the service, in their words, for example Saturday or 20 August."
                    }
                ]
            }
        },
        {
            "id": "goodbye",
            "type": "endCall",
            "data": {
                "name": "Close",
                "prompt": "In one sentence, repeat what was agreed. Thank them and say goodbye. Do not ask anything else.",
                "allow_interrupt": False
            }
        },
        {
            "id": "not_customer",
            "type": "endCall",
            "data": {
                "name": "Wrong person",
                "prompt": "Apologise for the trouble and say goodbye. Do not mention the car or the service."
            }
        }
    ],
    "edges": [
        {
            "id": "e1",
            "source": "identity",
            "target": "offer_slot",
            "data": {
                "label": "confirmed_identity",
                "condition": "The caller confirmed they are the customer you asked for."
            }
        },
        {
            "id": "e2",
            "source": "identity",
            "target": "not_customer",
            "data": {
                "label": "wrong_person",
                "condition": "The caller is someone else, or says it is a wrong number."
            }
        },
        {
            "id": "e3",
            "source": "offer_slot",
            "target": "goodbye",
            "data": {
                "label": "slot_booked",
                "condition": "The customer named a day for the service and you read it back."
            }
        },
        {
            "id": "e4",
            "source": "offer_slot",
            "target": "goodbye",
            "data": {
                "label": "not_now",
                "condition": "The customer does not want to book the service now."
            }
        }
    ]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const url = 'https://sandbox.voice.miraiminds.co/v2/agents/flow/validate';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    nodes: [
      {
        id: 'persona',
        type: 'globalNode',
        data: {
          name: 'Persona and rules',
          prompt: 'You are Ashu, a service advisor at Mirai Motors.\nSpeak everyday Hindi in Devanagari; common English words such as service, slot and workshop are fine.\nSay one or two short sentences, then listen.\nNever promise a discount, a price or a pickup.\nWhen the condition of one of your functions is met, call it at once without saying anything first.'
        }
      },
      {
        id: 'identity',
        type: 'startCall',
        data: {
          name: 'Confirm the customer',
          greeting: 'नमस्ते, मैं मिराई मोटर्स से आशु बोल रहा हूं. क्या मेरी बात {{name}} जी से हो रही है?',
          prompt: 'You have asked whether you are speaking with {{name}}. Wait for the answer.\nIf they confirm, call confirmed_identity.\nIf it is someone else or a wrong number, call wrong_person.\nDo not mention the car or the service before they confirm.'
        }
      },
      {
        id: 'offer_slot',
        type: 'agentNode',
        data: {
          name: 'Book the service',
          prompt: 'Tell them their {{vehicle}} is due for service on {{due_date}}, and ask which day they can bring it to the workshop.\nWhen they name a day, read it back once and call slot_booked.\nIf they do not want to book now, call not_now.',
          extraction_enabled: true,
          extraction_variables: [
            {
              name: 'preferred_day',
              type: 'string',
              prompt: 'The day the customer chose for the service, in their words, for example Saturday or 20 August.'
            }
          ]
        }
      },
      {
        id: 'goodbye',
        type: 'endCall',
        data: {
          name: 'Close',
          prompt: 'In one sentence, repeat what was agreed. Thank them and say goodbye. Do not ask anything else.',
          allow_interrupt: false
        }
      },
      {
        id: 'not_customer',
        type: 'endCall',
        data: {
          name: 'Wrong person',
          prompt: 'Apologise for the trouble and say goodbye. Do not mention the car or the service.'
        }
      }
    ],
    edges: [
      {
        id: 'e1',
        source: 'identity',
        target: 'offer_slot',
        data: {
          label: 'confirmed_identity',
          condition: 'The caller confirmed they are the customer you asked for.'
        }
      },
      {
        id: 'e2',
        source: 'identity',
        target: 'not_customer',
        data: {
          label: 'wrong_person',
          condition: 'The caller is someone else, or says it is a wrong number.'
        }
      },
      {
        id: 'e3',
        source: 'offer_slot',
        target: 'goodbye',
        data: {
          label: 'slot_booked',
          condition: 'The customer named a day for the service and you read it back.'
        }
      },
      {
        id: 'e4',
        source: 'offer_slot',
        target: 'goodbye',
        data: {
          label: 'not_now',
          condition: 'The customer does not want to book the service now.'
        }
      }
    ]
  })
};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

{
  "edges": 4,
  "flow_revision": "2c0eccdffdf0edca4e0a",
  "nodes": 5,
  "ok": true
}

{
  "details": [
    {
      "path": "flow.edges[2].data.label",
      "message": "must be a function name: a letter or underscore, then letters, digits or underscores (at most 64)"
    },
    {
      "path": "flow.edges[3].data.condition",
      "message": "is required: describe when the model should take this transition"
    }
  ],
  "error": "invalid_flow"
}