List agent versions
curl --request GET \
--url https://api.cartesia.ai/v1/agents/{agent_id}/versions \
--header 'Authorization: Bearer <token>' \
--header 'Cartesia-Version: <cartesia-version>'import requests
url = "https://api.cartesia.ai/v1/agents/{agent_id}/versions"
headers = {
"Cartesia-Version": "<cartesia-version>",
"Authorization": "Bearer <token>"
}
response = requests.get(url, headers=headers)
print(response.text)const options = {
method: 'GET',
headers: {'Cartesia-Version': '<cartesia-version>', Authorization: 'Bearer <token>'}
};
fetch('https://api.cartesia.ai/v1/agents/{agent_id}/versions', 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.cartesia.ai/v1/agents/{agent_id}/versions",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Cartesia-Version: <cartesia-version>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://api.cartesia.ai/v1/agents/{agent_id}/versions"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Cartesia-Version", "<cartesia-version>")
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://api.cartesia.ai/v1/agents/{agent_id}/versions")
.header("Cartesia-Version", "<cartesia-version>")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.cartesia.ai/v1/agents/{agent_id}/versions")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Cartesia-Version"] = '<cartesia-version>'
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{
"data": [
{
"config": {
"audio": {
"input": {
"keyterms": [
"<string>"
],
"noise_suppression": "off"
},
"output": {
"background_sound": {
"file_id": "<string>",
"volume": 1
},
"emotion": "<string>",
"pronunciation_dictionary_id": "<string>",
"speed": 1.05,
"voice_id": "<string>",
"volume": 1.25
}
},
"initial_message": "<string>",
"instructions": "<string>",
"language": {
"primary": "<string>"
},
"model": {
"id": "gpt-5.4-mini",
"max_output_tokens": 2048,
"temperature": 0.5
},
"system_tools": {
"end_call": {
"description": "<string>",
"pre_tool_speech": "auto"
},
"send_dtmf": {
"description": "<string>",
"pre_tool_speech": "auto"
},
"transfer_to_number": {
"description": "<string>",
"pre_tool_speech": "auto",
"transfers": [
{
"condition": "<string>",
"destination": {
"phone_number": "<string>",
"type": "phone"
}
}
]
}
},
"tools": [
{
"id": "<string>"
}
]
},
"created_at": "2023-11-07T05:31:56Z",
"created_by": "<string>",
"description": "<string>",
"id": "<string>"
}
],
"has_more": true,
"next_page": "<string>"
}{
"message": "<string>",
"request_id": "<string>",
"title": "<string>",
"doc_url": "<string>",
"error_code": "<string>"
}Versions
List Agent Versions
Returns the agent’s configuration history, ordered from newest to oldest. Each version is an immutable snapshot of the complete configuration.
GET
/
v1
/
agents
/
{agent_id}
/
versions
List agent versions
curl --request GET \
--url https://api.cartesia.ai/v1/agents/{agent_id}/versions \
--header 'Authorization: Bearer <token>' \
--header 'Cartesia-Version: <cartesia-version>'import requests
url = "https://api.cartesia.ai/v1/agents/{agent_id}/versions"
headers = {
"Cartesia-Version": "<cartesia-version>",
"Authorization": "Bearer <token>"
}
response = requests.get(url, headers=headers)
print(response.text)const options = {
method: 'GET',
headers: {'Cartesia-Version': '<cartesia-version>', Authorization: 'Bearer <token>'}
};
fetch('https://api.cartesia.ai/v1/agents/{agent_id}/versions', 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.cartesia.ai/v1/agents/{agent_id}/versions",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Cartesia-Version: <cartesia-version>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://api.cartesia.ai/v1/agents/{agent_id}/versions"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("Cartesia-Version", "<cartesia-version>")
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://api.cartesia.ai/v1/agents/{agent_id}/versions")
.header("Cartesia-Version", "<cartesia-version>")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.cartesia.ai/v1/agents/{agent_id}/versions")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["Cartesia-Version"] = '<cartesia-version>'
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body{
"data": [
{
"config": {
"audio": {
"input": {
"keyterms": [
"<string>"
],
"noise_suppression": "off"
},
"output": {
"background_sound": {
"file_id": "<string>",
"volume": 1
},
"emotion": "<string>",
"pronunciation_dictionary_id": "<string>",
"speed": 1.05,
"voice_id": "<string>",
"volume": 1.25
}
},
"initial_message": "<string>",
"instructions": "<string>",
"language": {
"primary": "<string>"
},
"model": {
"id": "gpt-5.4-mini",
"max_output_tokens": 2048,
"temperature": 0.5
},
"system_tools": {
"end_call": {
"description": "<string>",
"pre_tool_speech": "auto"
},
"send_dtmf": {
"description": "<string>",
"pre_tool_speech": "auto"
},
"transfer_to_number": {
"description": "<string>",
"pre_tool_speech": "auto",
"transfers": [
{
"condition": "<string>",
"destination": {
"phone_number": "<string>",
"type": "phone"
}
}
]
}
},
"tools": [
{
"id": "<string>"
}
]
},
"created_at": "2023-11-07T05:31:56Z",
"created_by": "<string>",
"description": "<string>",
"id": "<string>"
}
],
"has_more": true,
"next_page": "<string>"
}{
"message": "<string>",
"request_id": "<string>",
"title": "<string>",
"doc_url": "<string>",
"error_code": "<string>"
}Authorizations
Cartesia API key (sk_car_...). Get one at play.cartesia.ai/keys.
Headers
API version header.
Available options:
2026-08-14 Example:
"2026-08-14"
Path Parameters
Unique identifier for the agent.
Minimum string length:
1Query Parameters
A cursor for pagination. Pass the ID of the last item from the previous page to fetch the next page.
A cursor for pagination. Pass the ID of the first item from the previous page to fetch the previous page.
The maximum number of items to return, ranging between 1 and 100.
Required range:
1 <= x <= 100Response
List agent versions
A page of immutable agent configuration versions, ordered from newest to oldest.
Was this page helpful?