curl --request POST \
  --url https://sandbox.voice.miraiminds.co/v2/agents/flow/refine \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "flow": {
    "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/refine"

payload = { "flow": {
        "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/refine';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    flow: {
      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));

{
  "id": "frf_01KZR3Q5S89NTXQ40V3KYN4JMA",
  "object": "flow_refinement",
  "status": "running",
  "stage": "writing_scenarios",
  "progress": {
    "round": 1,
    "rounds": 2,
    "tests_done": 0,
    "tests_total": 1
  },
  "model": "gemini-3.8-flash",
  "simulation_model": "voice-agent",
  "agent_id": "agt_01K2M4P7QRSTVWXYZ0A1B2C3",
  "input_flow_revision": "2c0eccdffdf0edca4e0a",
  "created_at": "2026-08-11T09:51:05Z",
  "updated_at": "2026-08-11T09:51:05Z",
  "finished_at": null,
  "examples": [],
  "calls": [],
  "rounds": [],
  "found": [],
  "remaining": [],
  "usage": {
    "prompt_tokens": 0,
    "completion_tokens": 0
  },
  "cost": {
    "amount_inr": 0
  }
}

{
  "error": {
    "code": "invalid_request",
    "message": "nothing to test: give calls (1–5 transcripts of test calls you made), simulate (1–5 simulated calls), or both"
  }
}

{
  "error": {
    "code": "insufficient_balance",
    "message": "wallet balance 0.00 INR is empty; testing a flow needs a positive balance"
  }
}