List Session threads

curl --request GET \
  --url https://api.checkfu.com/v1/sessions/{session_id}/threads \
  --header 'Authorization: Bearer <token>' \
  --header 'checkfu-version: <checkfu-version>'

import requests

url = "https://api.checkfu.com/v1/sessions/{session_id}/threads"

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/{session_id}/threads', 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/{session_id}/threads",
  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/{session_id}/threads"

	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/{session_id}/threads")
  .header("checkfu-version", "<checkfu-version>")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.checkfu.com/v1/sessions/{session_id}/threads")

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

{
  "data": [
    {
      "id": "<string>",
      "type": "session_thread",
      "agent": {
        "id": "<string>",
        "description": "<string>",
        "mcp_servers": [
          {
            "type": "url",
            "name": "<string>",
            "url": "<string>"
          }
        ],
        "model": {
          "id": "<string>",
          "effort": {
            "type": "low"
          },
          "inference_geo": "global",
          "speed": "standard"
        },
        "name": "<string>",
        "skills": [
          {
            "type": "anthropic",
            "skill_id": "<string>",
            "version": "<string>"
          }
        ],
        "system": "<string>",
        "tools": [
          {
            "type": "agent_toolset_20260401",
            "configs": [
              {
                "name": "bash",
                "type": "bash",
                "enabled": true,
                "permission_policy": {
                  "type": "always_allow"
                }
              }
            ],
            "default_config": {
              "enabled": true,
              "permission_policy": {
                "type": "always_allow"
              }
            }
          }
        ],
        "type": "agent",
        "version": 1
      },
      "archived_at": "<string>",
      "created_at": "<string>",
      "parent_thread_id": "<string>",
      "session_id": "<string>",
      "stats": {
        "active_seconds": 1,
        "duration_seconds": 1,
        "startup_seconds": 1
      },
      "status": "running",
      "updated_at": "<string>",
      "usage": {
        "input_tokens": 1,
        "output_tokens": 1,
        "cache_read_input_tokens": 1,
        "cache_creation": {
          "ephemeral_1h_input_tokens": 1,
          "ephemeral_5m_input_tokens": 1
        }
      }
    }
  ],
  "next_page": "<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"
  }
}

List Session threads

Lists the Session’s persistent threads primary-first and then in spawn order. Each resource has a stable sthr_ id, frozen Agent snapshot, parent relation, running | idle | rescheduling | terminated status, cumulative usage and live timing stats, and archive timestamps. Timing freezes only when a thread is archived. Returns at most 1,000 resources and an opaque next_page cursor.

Checkfu support posture: alpha; hosted. Required evidence journey: session-threads. Deployment-specific readiness and the latest proven release are available from GET /v1/support/capabilities.

GET

sessions

{session_id}

threads

List Session threads

curl --request GET \
  --url https://api.checkfu.com/v1/sessions/{session_id}/threads \
  --header 'Authorization: Bearer <token>' \
  --header 'checkfu-version: <checkfu-version>'

import requests

url = "https://api.checkfu.com/v1/sessions/{session_id}/threads"

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/{session_id}/threads', 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/{session_id}/threads",
  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/{session_id}/threads"

	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/{session_id}/threads")
  .header("checkfu-version", "<checkfu-version>")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.checkfu.com/v1/sessions/{session_id}/threads")

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

{
  "data": [
    {
      "id": "<string>",
      "type": "session_thread",
      "agent": {
        "id": "<string>",
        "description": "<string>",
        "mcp_servers": [
          {
            "type": "url",
            "name": "<string>",
            "url": "<string>"
          }
        ],
        "model": {
          "id": "<string>",
          "effort": {
            "type": "low"
          },
          "inference_geo": "global",
          "speed": "standard"
        },
        "name": "<string>",
        "skills": [
          {
            "type": "anthropic",
            "skill_id": "<string>",
            "version": "<string>"
          }
        ],
        "system": "<string>",
        "tools": [
          {
            "type": "agent_toolset_20260401",
            "configs": [
              {
                "name": "bash",
                "type": "bash",
                "enabled": true,
                "permission_policy": {
                  "type": "always_allow"
                }
              }
            ],
            "default_config": {
              "enabled": true,
              "permission_policy": {
                "type": "always_allow"
              }
            }
          }
        ],
        "type": "agent",
        "version": 1
      },
      "archived_at": "<string>",
      "created_at": "<string>",
      "parent_thread_id": "<string>",
      "session_id": "<string>",
      "stats": {
        "active_seconds": 1,
        "duration_seconds": 1,
        "startup_seconds": 1
      },
      "status": "running",
      "updated_at": "<string>",
      "usage": {
        "input_tokens": 1,
        "output_tokens": 1,
        "cache_read_input_tokens": 1,
        "cache_creation": {
          "ephemeral_1h_input_tokens": 1,
          "ephemeral_5m_input_tokens": 1
        }
      }
    }
  ],
  "next_page": "<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

Authorization

string

header

required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Headers

checkfu-version

enum<string>

required

Available options:

2026-08-27

Path Parameters

session_id

string

required

Pattern: ^sess_[0-9a-f]{32}$

Query Parameters

limit

integer

Required range: 1 <= x <= 1000

page

string

Maximum string length: 14

Pattern: ^c1_[0-9a-z]+$

Response

A bounded page of Session threads ordered primary-first, then by spawn order.

data

object[]

required

Show child attributes

next_page

string | null

required

Developer tools

Canonical tables

Author protocols

Generated HTTP API

List Session threads

Authorizations

Headers

Path Parameters

Query Parameters

Response