Update Event

Update an event definition's description or schema.

Endpoint

PATCH /events/{id}

Path Parameters

Parameter	Type	Description
id	string	The event ID

Body Parameters

Parameter	Type	Required	Description
description	string	No	Updated description. Max 2000 characters.
schema	object	No	Replacement field schema. See Create Event.

name is immutable

The event name cannot be changed after creation — it is not accepted by this endpoint. To rename an event, create a new definition and migrate any automations that reference the old one.

Schema is replaced, not merged

Providing schema replaces the entire field list. To add a field, send the full updated fields array.

---

Response

Returns the updated event. See Create Event for the field reference.

{
  "id": "01957e3a-4b5c-7d8e-9f0a-1b2c3d4e5f6a",
  "name": "order.completed",
  "description": "Updated description.",
  "schema": {
    "fields": [
      { "name": "order_id", "type": "string", "required": true },
      { "name": "total", "type": "number", "required": true }
    ]
  },
  "created_at": "2026-06-01T12:00:00.000Z",
  "updated_at": "2026-06-02T09:30:00.000Z"
}

---

Examples

cURL

curl -X PATCH "https://api.arsel.sa/v1/events/01957e3a-4b5c-7d8e-9f0a-1b2c3d4e5f6a" \
  -H "Authorization: Bearer be_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "description": "Updated description.",
    "schema": {
      "fields": [
        { "name": "order_id", "type": "string", "required": true },
        { "name": "total", "type": "number", "required": true }
      ]
    }
  }'

JavaScript

const id = "01957e3a-4b5c-7d8e-9f0a-1b2c3d4e5f6a";
const response = await fetch(`https://api.arsel.sa/v1/events/${id}`, {
  method: "PATCH",
  headers: {
    "Content-Type": "application/json",
    Authorization: "Bearer be_your_api_key",
  },
  body: JSON.stringify({
    description: "Updated description.",
    schema: {
      fields: [
        { name: "order_id", type: "string", required: true },
        { name: "total", type: "number", required: true },
      ],
    },
  }),
});

const event = await response.json();
console.log(event.updated_at);

Python

import requests

event_id = "01957e3a-4b5c-7d8e-9f0a-1b2c3d4e5f6a"
response = requests.patch(
    f"https://api.arsel.sa/v1/events/{event_id}",
    headers={
        "Content-Type": "application/json",
        "Authorization": "Bearer be_your_api_key",
    },
    json={
        "description": "Updated description.",
        "schema": {
            "fields": [
                {"name": "order_id", "type": "string", "required": True},
                {"name": "total", "type": "number", "required": True},
            ]
        },
    },
)

print(response.json()["updated_at"])

C#

using var client = new HttpClient();
client.DefaultRequestHeaders.Add("Authorization", "Bearer be_your_api_key");

var id = "01957e3a-4b5c-7d8e-9f0a-1b2c3d4e5f6a";
var payload = new
{
    description = "Updated description.",
    schema = new
    {
        fields = new[]
        {
            new { name = "order_id", type = "string", required = true },
            new { name = "total", type = "number", required = true }
        }
    }
};

var json = System.Text.Json.JsonSerializer.Serialize(payload);
var request = new HttpRequestMessage(HttpMethod.Patch, $"https://api.arsel.sa/v1/events/{id}")
{
    Content = new StringContent(json, System.Text.Encoding.UTF8, "application/json")
};
var response = await client.SendAsync(request);
Console.WriteLine(await response.Content.ReadAsStringAsync());

PHP

<?php
$id = "01957e3a-4b5c-7d8e-9f0a-1b2c3d4e5f6a";
$ch = curl_init("https://api.arsel.sa/v1/events/$id");
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    "Content-Type: application/json",
    "Authorization: Bearer be_your_api_key"
]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PATCH");
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([
    "description" => "Updated description.",
    "schema" => [
        "fields" => [
            ["name" => "order_id", "type" => "string", "required" => true],
            ["name" => "total", "type" => "number", "required" => true]
        ]
    ]
]));
$response = curl_exec($ch);
echo $response;
curl_close($ch);

---

Error Responses

404 Not Found

{
  "status_code": 404,
  "name": "not_found",
  "message": "Event 01957e3a-4b5c-7d8e-9f0a-1b2c3d4e5f6a not found"
}

422 Validation Error

{
  "status_code": 422,
  "name": "validation_error",
  "message": "field.name must be a valid identifier"
}

401 Unauthorized

{
  "status_code": 401,
  "name": "unauthorized",
  "message": "Invalid or missing API key"
}