Agents

Update Agent

Changed on Nov 6, 2026

Partially updates an existing agent by agentId. Only fields provided in the request body are updated — omitted fields remain unchanged. Returns the updated agent record.

patch/v1/agents/{agentId}

Request

Base URL
https://api.sigmamind.ai
Auth
API key in header X-API-Key

Path parameters

agentIdstring required

Unique identifier of the agent to update.

Request body

agentNamestring

Human-readable name of the agent used to identify it in the dashboard and APIs.

instructionsstring

Core system prompt that defines the agent’s behavior, personality, tone, response style, goals, and task handling logic. These instructions guide how the agent interacts with users and responds during conversations.

welcomeMessageType'static' | 'prompt'

Determines how the agent’s welcome message is generated. Use 'static' to send a fixed predefined message, or 'prompt' to dynamically generate the welcome message using AI instructions.

welcomeMessagestring

The content of the welcome message. If 'welcomeMessageType' is 'static', this contains the exact message shown to the user. If it is 'prompt', this contains the prompt used to generate the welcome message dynamically.

Example request

{
  "agentName": "Auralis",
  "instructions": "You are a helpful customer support assistant. Answer concisely and professionally.",
  "welcomeMessageType": "static",
  "welcomeMessage": "Welcome to our service! How can I assist you today?",
  "agentSettings": {
    "language": "en_US",
    "aiStartsConversation": true,
    "backgroundSound": "keyboard_typing",
    "globalPrompt": "You are a professional virtual assistant. Always respond politely and keep answers concise.",
    "remindersIntervalDuration": 15,
    "remindersLimit": 3,
    "endCallOnSilenceDuration": 30,
    "maxCallDuration": 40,
    "llmModel": "gpt-5.6-luna",
    "llmTemperature": 0.5,
    "llmTopP": 0.5,
    "llmTopK": 40,
    "voiceId": "elevenlabs_SGbOfpm28edC83pZ9iGb",
    "voiceModelId": "eleven_turbo_v2_5",
    "ttsSpeed": 0.7,
    "ttsTemperature": 0.5,
    "ttsVolume": 0.5,
    "aiStartsSpeakingPlan": 0.5,
    "aiStopsSpeakingPlan": 0.5,
    "ivrHangup": true,
    "agentTimezone": "Asia/Kolkata",
    "autoVolumeNormalization": true,
    "backgroundNoiseFilter": true,
    "echoCancellation": true,
    "enablePostConversationAnalysis": true,
    "postConversationAnalysisLlmModel": "gpt-5.6-luna",
    "postConversationAnalysis": [
      {
        "insightName": "conversation summary",
        "dataType": "string",
        "options": [
          "Interested",
          "Not Interested",
          "Follow Up Later"
        ]
      }
    ],
    "webhooks": [
      {
        "webhookId": "wh_BUbkx3PsbzQm5V10",
        "name": "Call Events - Production",
        "url": "https://yourapp.com/webhooks/sigmamind",
        "events": [
          "conversation_started",
          "conversation_ended"
        ]
      }
    ]
  },
  "tools": [
    {
      "type": "voice_transfer_call",
      "transferToRouting": "static",
      "transferTo": "+9187788XXXXX",
      "extensionNumber": "1234",
      "transferSettings": {
        "ringingDuration": 40
      }
    }
  ]
}

Response

agentIdstring

Id of the agent.