ElevenLabs tool: update contact fields mid-call

curl --request POST \
  --url https://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact \
  --header 'Content-Type: application/json' \
  --data '
{
  "phone_number": "+14165550100",
  "first_name": "Alex",
  "last_name": "Morgan",
  "email": "alex.morgan@example.com",
  "called_id": "+12362320246"
}
'

import requests

url = "https://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact"

payload = {
    "phone_number": "+14165550100",
    "first_name": "Alex",
    "last_name": "Morgan",
    "email": "alex.morgan@example.com",
    "called_id": "+12362320246"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    phone_number: '+14165550100',
    first_name: 'Alex',
    last_name: 'Morgan',
    email: 'alex.morgan@example.com',
    called_id: '+12362320246'
  })
};

fetch('https://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact', 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://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'phone_number' => '+14165550100',
    'first_name' => 'Alex',
    'last_name' => 'Morgan',
    'email' => 'alex.morgan@example.com',
    'called_id' => '+12362320246'
  ]),
  CURLOPT_HTTPHEADER => [
    "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://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact"

	payload := strings.NewReader("{\n  \"phone_number\": \"+14165550100\",\n  \"first_name\": \"Alex\",\n  \"last_name\": \"Morgan\",\n  \"email\": \"alex.morgan@example.com\",\n  \"called_id\": \"+12362320246\"\n}")

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

	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.post("https://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact")
  .header("Content-Type", "application/json")
  .body("{\n  \"phone_number\": \"+14165550100\",\n  \"first_name\": \"Alex\",\n  \"last_name\": \"Morgan\",\n  \"email\": \"alex.morgan@example.com\",\n  \"called_id\": \"+12362320246\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"phone_number\": \"+14165550100\",\n  \"first_name\": \"Alex\",\n  \"last_name\": \"Morgan\",\n  \"email\": \"alex.morgan@example.com\",\n  \"called_id\": \"+12362320246\"\n}"

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

{
  "success": true,
  "message": "Contact updated",
  "updated_fields": [
    "firstName",
    "lastName",
    "email"
  ]
}

{
  "error": "Webhook processing failed"
}

{
  "error": "Webhook processing failed"
}

Webhooks

ElevenLabs tool: update contact fields mid-call

Server tool webhook called by the ElevenLabs voice agent mid-call to correct or enrich a caller’s contact record — typically when the caller spells their name or gives a new email. Identifies the contact by phone_number within the org scoped from the tool secret; at least one of first_name/last_name/email must be supplied. Phone number itself is intentionally NOT updatable here (would require de-dupe + verification flow). New emails are appended to the contact’s email[] array (preserving history) and become primary if no primary exists yet. Per ElevenLabs convention, recoverable problems (missing fields, contact not found) return HTTP 200 with success:false so the agent can speak the error to the caller. Authenticated via Bearer token (per-org elevenlabsToolSecret).

POST

api

webhook

elevenlabs

tools

update-contact

ElevenLabs tool: update contact fields mid-call

curl --request POST \
  --url https://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact \
  --header 'Content-Type: application/json' \
  --data '
{
  "phone_number": "+14165550100",
  "first_name": "Alex",
  "last_name": "Morgan",
  "email": "alex.morgan@example.com",
  "called_id": "+12362320246"
}
'

import requests

url = "https://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact"

payload = {
    "phone_number": "+14165550100",
    "first_name": "Alex",
    "last_name": "Morgan",
    "email": "alex.morgan@example.com",
    "called_id": "+12362320246"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    phone_number: '+14165550100',
    first_name: 'Alex',
    last_name: 'Morgan',
    email: 'alex.morgan@example.com',
    called_id: '+12362320246'
  })
};

fetch('https://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact', 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://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'phone_number' => '+14165550100',
    'first_name' => 'Alex',
    'last_name' => 'Morgan',
    'email' => 'alex.morgan@example.com',
    'called_id' => '+12362320246'
  ]),
  CURLOPT_HTTPHEADER => [
    "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://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact"

	payload := strings.NewReader("{\n  \"phone_number\": \"+14165550100\",\n  \"first_name\": \"Alex\",\n  \"last_name\": \"Morgan\",\n  \"email\": \"alex.morgan@example.com\",\n  \"called_id\": \"+12362320246\"\n}")

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

	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.post("https://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact")
  .header("Content-Type", "application/json")
  .body("{\n  \"phone_number\": \"+14165550100\",\n  \"first_name\": \"Alex\",\n  \"last_name\": \"Morgan\",\n  \"email\": \"alex.morgan@example.com\",\n  \"called_id\": \"+12362320246\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://your-instance.example.com/api/webhook/elevenlabs/tools/update-contact")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"phone_number\": \"+14165550100\",\n  \"first_name\": \"Alex\",\n  \"last_name\": \"Morgan\",\n  \"email\": \"alex.morgan@example.com\",\n  \"called_id\": \"+12362320246\"\n}"

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

{
  "success": true,
  "message": "Contact updated",
  "updated_fields": [
    "firstName",
    "lastName",
    "email"
  ]
}

{
  "error": "Webhook processing failed"
}

{
  "error": "Webhook processing failed"
}

Body

application/json

ElevenLabs update-contact tool args. phone_number identifies the contact; at least one of first_name/last_name/email must be set. Phone numbers themselves cannot be changed via this endpoint.

phone_number

string

required

Contact phone number (E.164 preferred).

first_name

string

last_name

string

string<email>

Appended to the contact's email[] (history preserved); becomes primary if none is set.

called_id

string

Twilio/Sinch called number — used by ElevenLabs to route auth context.

called_number

string

Alternative key for called_id.

Response

Update result. Inspect success to disambiguate applied update vs. recoverable error.

success

boolean

required

message

string

updated_fields

string[]

Mongo field paths that were $set (e.g. firstName, lastName, email).

error

string

Present when success is false.

⌘I

Overview

Endpoints

ElevenLabs tool: update contact fields mid-call

Body

Response