curl --request PATCH \
  --url https://api.waterr.ai/v1/custom-functions/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "on_call": "static_filler",
  "static_filler": "One moment, looking that up.",
  "on_resolve": "generate_response"
}
'

import requests

url = "https://api.waterr.ai/v1/custom-functions/{id}"

payload = {
    "on_call": "static_filler",
    "static_filler": "One moment, looking that up.",
    "on_resolve": "generate_response"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    on_call: 'static_filler',
    static_filler: 'One moment, looking that up.',
    on_resolve: 'generate_response'
  })
};

fetch('https://api.waterr.ai/v1/custom-functions/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.waterr.ai/v1/custom-functions/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'on_call' => 'static_filler',
    'static_filler' => 'One moment, looking that up.',
    'on_resolve' => 'generate_response'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.waterr.ai/v1/custom-functions/{id}"

	payload := strings.NewReader("{\n  \"on_call\": \"static_filler\",\n  \"static_filler\": \"One moment, looking that up.\",\n  \"on_resolve\": \"generate_response\"\n}")

	req, _ := http.NewRequest("PATCH", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.patch("https://api.waterr.ai/v1/custom-functions/{id}")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"on_call\": \"static_filler\",\n  \"static_filler\": \"One moment, looking that up.\",\n  \"on_resolve\": \"generate_response\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.waterr.ai/v1/custom-functions/{id}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Patch.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"on_call\": \"static_filler\",\n  \"static_filler\": \"One moment, looking that up.\",\n  \"on_resolve\": \"generate_response\"\n}"

response = http.request(request)
puts response.read_body

{
  "data": {
    "id": "4f8a6c50-9d3b-4c1f-9c0a-7a3b6e2d1f10",
    "name": "lookup_account",
    "description": "Fetch the participant's CRM record so you can reference their plan, MRR, and last contact date.",
    "parameters_schema": {
      "type": "object",
      "properties": {
        "account_id": {
          "type": "string",
          "description": "The participant's account ID (e.g. cus_XXXX)."
        }
      },
      "required": [
        "account_id"
      ]
    },
    "execution_mode": "webhook",
    "has_webhook_secret": true,
    "timeout_ms": 8000,
    "tool_spec": {
      "type": "function",
      "function": {
        "name": "lookup_account",
        "description": "Fetch the participant's CRM record so you can reference their plan, MRR, and last contact date.",
        "parameters": {
          "type": "object",
          "properties": {
            "account_id": {
              "type": "string"
            }
          },
          "required": [
            "account_id"
          ]
        }
      }
    },
    "membership_id": "a1b2c3d4-e5f6-7890-abcd-ef0123456789",
    "webhook_url": "https://your-app.com/waterr/tools/lookup_account",
    "on_call": "static_filler",
    "static_filler": "Sure, let me grab that for you.",
    "on_resolve": "generate_response",
    "created_at": "2026-06-18T12:34:56.000Z",
    "updated_at": "2026-06-18T12:34:56.000Z"
  }
}