List raw UsageLedger entries

curl --request GET \
  --url https://api.checkfu.com/v1/usage \
  --header 'Authorization: Bearer <token>' \
  --header 'checkfu-version: <checkfu-version>'

import requests

url = "https://api.checkfu.com/v1/usage"

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/usage', 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/usage",
  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/usage"

	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))

}

require 'uri'
require 'net/http'

url = URI("https://api.checkfu.com/v1/usage")

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>",
      "session_id": "<string>",
      "run": "<string>",
      "attempt": "<string>",
      "agent_definition_id": "<string>",
      "sequence": 1,
      "workspace_id": "<string>",
      "principal_id": "<string>",
      "anonymous_subject_ref": "<string>",
      "recorded_at": "<string>",
      "measurement": {
        "kind": "model",
        "model_routing_profile_id": "<string>",
        "candidate": {
          "tier": "default",
          "provider": "<string>",
          "model": "<string>",
          "effort": "minimal",
          "speed": "standard"
        },
        "tokens": {
          "input_tokens": 1,
          "cached_input_tokens": 1,
          "cache_write_input_tokens": 1,
          "output_tokens": 1,
          "reasoning_output_tokens": 1,
          "total_tokens": 1
        },
        "measured_at": "<string>",
        "supply_class": "platform_supply"
      },
      "cost": {
        "tokens": 1,
        "model_spend_microusd": 1,
        "active_ms": "<unknown>",
        "storage_mib_ms": "<unknown>",
        "running_ms": "<unknown>",
        "billed_microusd": "<unknown>"
      },
      "surface_scope_id": "<string>",
      "automation_id": "<string>"
    }
  ],
  "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": "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 raw UsageLedger entries

Returns a page of append-only UsageEntry records, each carrying exactly one model, unit-metered, session-runtime, sandbox-compute, or snapshot-retention measurement plus its immutable Workspace, Session, Run, Agent, Principal, SurfaceScope, and Automation attribution. Filter by any of those dimensions and by order; each page is clamped to at most 1,000 entries. This is the raw ledger — prefer usage.getUsageSeries when you want totals rather than individual facts.

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

GET

usage

curl --request GET \
  --url https://api.checkfu.com/v1/usage \
  --header 'Authorization: Bearer <token>' \
  --header 'checkfu-version: <checkfu-version>'

import requests

url = "https://api.checkfu.com/v1/usage"

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/usage', 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/usage",
  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/usage"

	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))

}

require 'uri'
require 'net/http'

url = URI("https://api.checkfu.com/v1/usage")

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>",
      "session_id": "<string>",
      "run": "<string>",
      "attempt": "<string>",
      "agent_definition_id": "<string>",
      "sequence": 1,
      "workspace_id": "<string>",
      "principal_id": "<string>",
      "anonymous_subject_ref": "<string>",
      "recorded_at": "<string>",
      "measurement": {
        "kind": "model",
        "model_routing_profile_id": "<string>",
        "candidate": {
          "tier": "default",
          "provider": "<string>",
          "model": "<string>",
          "effort": "minimal",
          "speed": "standard"
        },
        "tokens": {
          "input_tokens": 1,
          "cached_input_tokens": 1,
          "cache_write_input_tokens": 1,
          "output_tokens": 1,
          "reasoning_output_tokens": 1,
          "total_tokens": 1
        },
        "measured_at": "<string>",
        "supply_class": "platform_supply"
      },
      "cost": {
        "tokens": 1,
        "model_spend_microusd": 1,
        "active_ms": "<unknown>",
        "storage_mib_ms": "<unknown>",
        "running_ms": "<unknown>",
        "billed_microusd": "<unknown>"
      },
      "surface_scope_id": "<string>",
      "automation_id": "<string>"
    }
  ],
  "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": "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:

2026-08-24

Query Parameters

limit

integer

Required range: x >= 1

page

string

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

principal_id

string

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

agent_id

string

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

surface_scope_id

string

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

automation_id

string

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

session_id

string

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

run

string

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

order

enum<string>

Available options:

asc,

desc

Response

Success

data

object[]

required

Option 1
Option 2
Option 3
Option 4
Option 5

Show child attributes

next_page

string | null

required

Developer tools

Canonical tables

Author protocols

Generated HTTP API

List raw UsageLedger entries

Authorizations

Headers

Query Parameters

Response