Stream a thread run
curl --request POST \
--url https://api.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream \
--header 'Content-Type: application/json' \
--header 'X-Api-Key: <api-key>' \
--data '
{
"agent_id": "11111111-1111-1111-1111-111111111111",
"messages": [
{
"role": "user",
"content": "Research recent approaches to agent memory and summarize the main tradeoffs."
}
],
"stream_mode": [
"updates"
],
"stream_subgraphs": true,
"user_timezone": "America/Los_Angeles"
}
'import requests
url = "https://api.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream"
payload = {
"agent_id": "11111111-1111-1111-1111-111111111111",
"messages": [
{
"role": "user",
"content": "Research recent approaches to agent memory and summarize the main tradeoffs."
}
],
"stream_mode": ["updates"],
"stream_subgraphs": True,
"user_timezone": "America/Los_Angeles"
}
headers = {
"X-Api-Key": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'X-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
agent_id: '11111111-1111-1111-1111-111111111111',
messages: [
{
role: 'user',
content: 'Research recent approaches to agent memory and summarize the main tradeoffs.'
}
],
stream_mode: ['updates'],
stream_subgraphs: true,
user_timezone: 'America/Los_Angeles'
})
};
fetch('https://api.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/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.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream",
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([
'agent_id' => '11111111-1111-1111-1111-111111111111',
'messages' => [
[
'role' => 'user',
'content' => 'Research recent approaches to agent memory and summarize the main tradeoffs.'
]
],
'stream_mode' => [
'updates'
],
'stream_subgraphs' => true,
'user_timezone' => 'America/Los_Angeles'
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"X-Api-Key: <api-key>"
],
]);
$response = curl_exec($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.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream"
payload := strings.NewReader("{\n \"agent_id\": \"11111111-1111-1111-1111-111111111111\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"Research recent approaches to agent memory and summarize the main tradeoffs.\"\n }\n ],\n \"stream_mode\": [\n \"updates\"\n ],\n \"stream_subgraphs\": true,\n \"user_timezone\": \"America/Los_Angeles\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("X-Api-Key", "<api-key>")
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://api.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream")
.header("X-Api-Key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"agent_id\": \"11111111-1111-1111-1111-111111111111\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"Research recent approaches to agent memory and summarize the main tradeoffs.\"\n }\n ],\n \"stream_mode\": [\n \"updates\"\n ],\n \"stream_subgraphs\": true,\n \"user_timezone\": \"America/Los_Angeles\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["X-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"agent_id\": \"11111111-1111-1111-1111-111111111111\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"Research recent approaches to agent memory and summarize the main tradeoffs.\"\n }\n ],\n \"stream_mode\": [\n \"updates\"\n ],\n \"stream_subgraphs\": true,\n \"user_timezone\": \"America/Los_Angeles\"\n}"
response = http.request(request)
puts response.read_body"<string>"{
"type": "<string>",
"code": "<string>",
"detail": "<string>",
"status": 123
}{
"type": "<string>",
"code": "<string>",
"detail": "<string>",
"status": 123
}{
"type": "<string>",
"code": "<string>",
"detail": "<string>",
"status": 123
}{
"type": "<string>",
"code": "<string>",
"detail": "<string>",
"status": 123
}{
"type": "<string>",
"code": "<string>",
"detail": "<string>",
"status": 123
}Stream a thread run
Start a run on a thread and stream output as server-sent events. The request must use agent_id; assistant_id is reserved for server-side forwarding and is rejected.
POST
/
threads
/
{threadID}
/
runs
/
stream
Stream a thread run
curl --request POST \
--url https://api.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream \
--header 'Content-Type: application/json' \
--header 'X-Api-Key: <api-key>' \
--data '
{
"agent_id": "11111111-1111-1111-1111-111111111111",
"messages": [
{
"role": "user",
"content": "Research recent approaches to agent memory and summarize the main tradeoffs."
}
],
"stream_mode": [
"updates"
],
"stream_subgraphs": true,
"user_timezone": "America/Los_Angeles"
}
'import requests
url = "https://api.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream"
payload = {
"agent_id": "11111111-1111-1111-1111-111111111111",
"messages": [
{
"role": "user",
"content": "Research recent approaches to agent memory and summarize the main tradeoffs."
}
],
"stream_mode": ["updates"],
"stream_subgraphs": True,
"user_timezone": "America/Los_Angeles"
}
headers = {
"X-Api-Key": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'X-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
agent_id: '11111111-1111-1111-1111-111111111111',
messages: [
{
role: 'user',
content: 'Research recent approaches to agent memory and summarize the main tradeoffs.'
}
],
stream_mode: ['updates'],
stream_subgraphs: true,
user_timezone: 'America/Los_Angeles'
})
};
fetch('https://api.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/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.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream",
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([
'agent_id' => '11111111-1111-1111-1111-111111111111',
'messages' => [
[
'role' => 'user',
'content' => 'Research recent approaches to agent memory and summarize the main tradeoffs.'
]
],
'stream_mode' => [
'updates'
],
'stream_subgraphs' => true,
'user_timezone' => 'America/Los_Angeles'
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"X-Api-Key: <api-key>"
],
]);
$response = curl_exec($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.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream"
payload := strings.NewReader("{\n \"agent_id\": \"11111111-1111-1111-1111-111111111111\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"Research recent approaches to agent memory and summarize the main tradeoffs.\"\n }\n ],\n \"stream_mode\": [\n \"updates\"\n ],\n \"stream_subgraphs\": true,\n \"user_timezone\": \"America/Los_Angeles\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("X-Api-Key", "<api-key>")
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://api.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream")
.header("X-Api-Key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"agent_id\": \"11111111-1111-1111-1111-111111111111\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"Research recent approaches to agent memory and summarize the main tradeoffs.\"\n }\n ],\n \"stream_mode\": [\n \"updates\"\n ],\n \"stream_subgraphs\": true,\n \"user_timezone\": \"America/Los_Angeles\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.smith.langchain.com/v1/deepagents/threads/{threadID}/runs/stream")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["X-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"agent_id\": \"11111111-1111-1111-1111-111111111111\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"Research recent approaches to agent memory and summarize the main tradeoffs.\"\n }\n ],\n \"stream_mode\": [\n \"updates\"\n ],\n \"stream_subgraphs\": true,\n \"user_timezone\": \"America/Los_Angeles\"\n}"
response = http.request(request)
puts response.read_body"<string>"{
"type": "<string>",
"code": "<string>",
"detail": "<string>",
"status": 123
}{
"type": "<string>",
"code": "<string>",
"detail": "<string>",
"status": 123
}{
"type": "<string>",
"code": "<string>",
"detail": "<string>",
"status": 123
}{
"type": "<string>",
"code": "<string>",
"detail": "<string>",
"status": 123
}{
"type": "<string>",
"code": "<string>",
"detail": "<string>",
"status": 123
}Authorizations
Path Parameters
Thread ID.
Body
application/json
Managed Deep Agent ID. The server forwards this upstream as assistant_id.
Input messages for the run.
Minimum array length:
1Show child attributes
Show child attributes
Stream modes to return.
Available options:
values, updates, messages-tuple Whether to stream subgraph events.
User timezone for runtime context.
Example:
"America/Los_Angeles"
Response
Server-sent event stream.
The response is of type string.
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