Stream Session events (SSE)
curl --request GET \
--url https://api.checkfu.com/v1/sessions/{id}/events/stream \
--header 'Authorization: Bearer <token>' \
--header 'checkfu-version: <checkfu-version>'import requests
url = "https://api.checkfu.com/v1/sessions/{id}/events/stream"
headers = {
"checkfu-version": "<checkfu-version>",
"Authorization": "Bearer <token>"
}
response = requests.get(url, headers=headers)
print(response.text)const options = {
method: 'GET',
headers: {'checkfu-version': '<checkfu-version>', Authorization: 'Bearer <token>'}
};
fetch('https://api.checkfu.com/v1/sessions/{id}/events/stream', 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.checkfu.com/v1/sessions/{id}/events/stream",
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>",
"checkfu-version: <checkfu-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.checkfu.com/v1/sessions/{id}/events/stream"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("checkfu-version", "<checkfu-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.checkfu.com/v1/sessions/{id}/events/stream")
.header("checkfu-version", "<checkfu-version>")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.checkfu.com/v1/sessions/{id}/events/stream")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["checkfu-version"] = '<checkfu-version>'
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body"<string>"{
"error": {
"type": "validation.malformed",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-malformed"
}
}{
"error": {
"type": "auth.invalid_key",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-invalid-key"
}
}{
"error": {
"type": "auth.disabled_tenancy",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-disabled-tenancy"
}
}{
"error": {
"type": "validation.not_found",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-not-found"
}
}{
"error": {
"type": "budget.exceeded",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#budget-exceeded"
}
}{
"error": {
"type": "runtime.internal",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#runtime-internal"
}
}Stream Session events (SSE)
SSE replay-then-live: replays persisted events from the cursor, then stays live. Resumes from Last-Event-ID (the per-session sequence). Stream-only deltas are opt-in through event_deltas and are never persisted.
Checkfu support posture: alpha; hosted. Required evidence journey: session-turn. Deployment-specific readiness and the latest proven release are available from GET /v1/support/capabilities.
GET
/
v1
/
sessions
/
{id}
/
events
/
stream
Stream Session events (SSE)
curl --request GET \
--url https://api.checkfu.com/v1/sessions/{id}/events/stream \
--header 'Authorization: Bearer <token>' \
--header 'checkfu-version: <checkfu-version>'import requests
url = "https://api.checkfu.com/v1/sessions/{id}/events/stream"
headers = {
"checkfu-version": "<checkfu-version>",
"Authorization": "Bearer <token>"
}
response = requests.get(url, headers=headers)
print(response.text)const options = {
method: 'GET',
headers: {'checkfu-version': '<checkfu-version>', Authorization: 'Bearer <token>'}
};
fetch('https://api.checkfu.com/v1/sessions/{id}/events/stream', 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.checkfu.com/v1/sessions/{id}/events/stream",
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>",
"checkfu-version: <checkfu-version>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://api.checkfu.com/v1/sessions/{id}/events/stream"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("checkfu-version", "<checkfu-version>")
req.Header.Add("Authorization", "Bearer <token>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://api.checkfu.com/v1/sessions/{id}/events/stream")
.header("checkfu-version", "<checkfu-version>")
.header("Authorization", "Bearer <token>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.checkfu.com/v1/sessions/{id}/events/stream")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["checkfu-version"] = '<checkfu-version>'
request["Authorization"] = 'Bearer <token>'
response = http.request(request)
puts response.read_body"<string>"{
"error": {
"type": "validation.malformed",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-malformed"
}
}{
"error": {
"type": "auth.invalid_key",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-invalid-key"
}
}{
"error": {
"type": "auth.disabled_tenancy",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-disabled-tenancy"
}
}{
"error": {
"type": "validation.not_found",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-not-found"
}
}{
"error": {
"type": "budget.exceeded",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#budget-exceeded"
}
}{
"error": {
"type": "runtime.internal",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#runtime-internal"
}
}Authorizations
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Headers
Maximum string length:
16Pattern:
^[0-9]+$Available options:
2026-08-29 Path Parameters
Pattern:
^sess_[0-9a-f]{32}$Query Parameters
Maximum string length:
14Pattern:
^c1_[0-9a-z]+$Repeat to opt into best-effort, stream-only previews. agent.message emits event_start and content_delta frames; agent.thinking emits event_start only.
Maximum array length:
2Available options:
agent.message, agent.thinking Set to 1 to receive one cursor-neutral checkfu.live_ready control frame after replay catches up and live subscribers are attached.
Available options:
1 Response
text/event-stream of event envelopes
The response is of type string.