Stage Computer write bytes
curl --request POST \
--url https://api.checkfu.com/v1/computers/{id}/headless-write-payloads \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--header 'checkfu-version: <checkfu-version>' \
--data '
{
"content_digest": "<string>",
"byte_length": 8388608,
"chunk_index": 2,
"content_base64": "<string>"
}
'import requests
url = "https://api.checkfu.com/v1/computers/{id}/headless-write-payloads"
payload = {
"content_digest": "<string>",
"byte_length": 8388608,
"chunk_index": 2,
"content_base64": "<string>"
}
headers = {
"checkfu-version": "<checkfu-version>",
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {
'checkfu-version': '<checkfu-version>',
Authorization: 'Bearer <token>',
'Content-Type': 'application/json'
},
body: JSON.stringify({
content_digest: '<string>',
byte_length: 8388608,
chunk_index: 2,
content_base64: '<string>'
})
};
fetch('https://api.checkfu.com/v1/computers/{id}/headless-write-payloads', 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/computers/{id}/headless-write-payloads",
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([
'content_digest' => '<string>',
'byte_length' => 8388608,
'chunk_index' => 2,
'content_base64' => '<string>'
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json",
"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"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.checkfu.com/v1/computers/{id}/headless-write-payloads"
payload := strings.NewReader("{\n \"content_digest\": \"<string>\",\n \"byte_length\": 8388608,\n \"chunk_index\": 2,\n \"content_base64\": \"<string>\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("checkfu-version", "<checkfu-version>")
req.Header.Add("Authorization", "Bearer <token>")
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.checkfu.com/v1/computers/{id}/headless-write-payloads")
.header("checkfu-version", "<checkfu-version>")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"content_digest\": \"<string>\",\n \"byte_length\": 8388608,\n \"chunk_index\": 2,\n \"content_base64\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.checkfu.com/v1/computers/{id}/headless-write-payloads")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["checkfu-version"] = '<checkfu-version>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"content_digest\": \"<string>\",\n \"byte_length\": 8388608,\n \"chunk_index\": 2,\n \"content_base64\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"status": "staging",
"replayed": true
}{
"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": "validation.conflict",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-conflict"
}
}{
"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"
}
}Stage Computer write bytes
Stages one chunk of content-addressed write bytes under the exact Computer before any operation is admitted.
POST
/
v1
/
computers
/
{id}
/
headless-write-payloads
Stage Computer write bytes
curl --request POST \
--url https://api.checkfu.com/v1/computers/{id}/headless-write-payloads \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--header 'checkfu-version: <checkfu-version>' \
--data '
{
"content_digest": "<string>",
"byte_length": 8388608,
"chunk_index": 2,
"content_base64": "<string>"
}
'import requests
url = "https://api.checkfu.com/v1/computers/{id}/headless-write-payloads"
payload = {
"content_digest": "<string>",
"byte_length": 8388608,
"chunk_index": 2,
"content_base64": "<string>"
}
headers = {
"checkfu-version": "<checkfu-version>",
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {
'checkfu-version': '<checkfu-version>',
Authorization: 'Bearer <token>',
'Content-Type': 'application/json'
},
body: JSON.stringify({
content_digest: '<string>',
byte_length: 8388608,
chunk_index: 2,
content_base64: '<string>'
})
};
fetch('https://api.checkfu.com/v1/computers/{id}/headless-write-payloads', 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/computers/{id}/headless-write-payloads",
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([
'content_digest' => '<string>',
'byte_length' => 8388608,
'chunk_index' => 2,
'content_base64' => '<string>'
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json",
"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"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.checkfu.com/v1/computers/{id}/headless-write-payloads"
payload := strings.NewReader("{\n \"content_digest\": \"<string>\",\n \"byte_length\": 8388608,\n \"chunk_index\": 2,\n \"content_base64\": \"<string>\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("checkfu-version", "<checkfu-version>")
req.Header.Add("Authorization", "Bearer <token>")
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.checkfu.com/v1/computers/{id}/headless-write-payloads")
.header("checkfu-version", "<checkfu-version>")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"content_digest\": \"<string>\",\n \"byte_length\": 8388608,\n \"chunk_index\": 2,\n \"content_base64\": \"<string>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.checkfu.com/v1/computers/{id}/headless-write-payloads")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["checkfu-version"] = '<checkfu-version>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"content_digest\": \"<string>\",\n \"byte_length\": 8388608,\n \"chunk_index\": 2,\n \"content_base64\": \"<string>\"\n}"
response = http.request(request)
puts response.read_body{
"status": "staging",
"replayed": true
}{
"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": "validation.conflict",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-conflict"
}
}{
"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
Available options:
2026-08-31 Maximum string length:
255Path Parameters
Pattern:
^comp_[0-9a-f]{32}$Body
application/json
Response
Acknowledgement for one staged write-payload chunk: whether custody is still staging or sealed against its digest, and whether this exact chunk replayed existing sealed bytes (which extends their retention).