curl -X PATCH https://reygrid.com/api/v1/agents/{AgentId} \
  -H "Authorization: Bearer $REYGRID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"instructions": "Answer in a friendly tone and keep replies under 80 words."}'

from reygrid import ReyGrid

client = ReyGrid(api_key="YOUR_API_KEY")

client.update_agent(
    "{AgentId}",
    instructions="Answer in a friendly tone and keep replies under 80 words.",
)

import { ReyGrid } from "reygrid";

const client = new ReyGrid({ apiKey: "YOUR_API_KEY" });

await client.updateAgent("{AgentId}", {
  instructions: "Answer in a friendly tone and keep replies under 80 words.",
});

{
  "success": true,
  "agent": {
    "id": {
      "AgentId": null
    },
    "name": "Support",
    "model": "gpt-4o-mini-2024-07-18",
    "instructions": "Answer in a friendly tone and keep replies under 80 words.",
    "usage": 119.5,
    "createdAt": "2026-08-25T00:43:49.979Z"
  }
}

{
  "success": false,
  "error": {
    "code": "INVALID_BODY",
    "message": "Invalid body",
    "list": {
      "title": [
        "Title too short"
      ]
    }
  }
}

{
  "error": "Unauthorized",
  "code": "AUTH_REQUIRED"
}

{
  "success": true,
  "error": {
    "code": "<string>",
    "message": "<string>",
    "list": [
      {}
    ]
  },
  "output": {},
  "usage": {
    "credits": 123
  }
}

{
  "success": false,
  "error": {
    "code": "SOURCE_NOT_FOUND",
    "message": "This source does not exist"
  }
}