Start a multipart upload
Starts a multipart upload of one weight file, for files too large for a single PUT
(over 5 GiB) and up to 5 TiB. The response splits the file into parts of part_size
bytes (64 MiB by default) and returns a presigned URL for each. PUT each part’s bytes
to its url, keep the ETag response header of each part, then call
POST .../weights/multipart/complete.
With sha256 set (and force unset), an identical file from an earlier release returns
copied: true with no parts: skip the upload.
Callable by an account_admin or developer of the owning account when model serving is
enabled for the account.
curl --request POST \
--url https://api.reactor.inc/models/{id}/releases/{release}/weights/multipart \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"name": "model.safetensors",
"size": 21474836480,
"sha256": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"
}
'import requests
url = "https://api.reactor.inc/models/{id}/releases/{release}/weights/multipart"
payload = {
"name": "model.safetensors",
"size": 21474836480,
"sha256": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"
}
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
name: 'model.safetensors',
size: 21474836480,
sha256: '9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08'
})
};
fetch('https://api.reactor.inc/models/{id}/releases/{release}/weights/multipart', 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.reactor.inc/models/{id}/releases/{release}/weights/multipart",
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([
'name' => 'model.safetensors',
'size' => 21474836480,
'sha256' => '9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08'
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($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.reactor.inc/models/{id}/releases/{release}/weights/multipart"
payload := strings.NewReader("{\n \"name\": \"model.safetensors\",\n \"size\": 21474836480,\n \"sha256\": \"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08\"\n}")
req, _ := http.NewRequest("POST", url, payload)
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.reactor.inc/models/{id}/releases/{release}/weights/multipart")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"name\": \"model.safetensors\",\n \"size\": 21474836480,\n \"sha256\": \"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.reactor.inc/models/{id}/releases/{release}/weights/multipart")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"name\": \"model.safetensors\",\n \"size\": 21474836480,\n \"sha256\": \"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08\"\n}"
response = http.request(request)
puts response.read_body{
"upload_id": "2~xYzAbC123",
"key": "partners/8c8b7e12-a4c1-4627-b0a0-5d2e9f3a7b61/weights/your-model/7b3f1bc2-a4e5-4d78-b9c1-0e6c2f9a1d34/v1.2.3-gabcdef0/files/model.safetensors",
"part_size": 67108864,
"parts": [
{
"part_number": 1,
"url": "https://storage.example.com/...?partNumber=1&uploadId=2~xYzAbC123",
"content_length": 67108864
},
{
"part_number": 2,
"url": "https://storage.example.com/...?partNumber=2&uploadId=2~xYzAbC123",
"content_length": 67108864
}
]
}{
"error": "<string>",
"message": "<string>",
"resource": "<string>",
"reason": "<string>"
}{
"error": "<string>",
"message": "<string>",
"resource": "<string>",
"reason": "<string>"
}{
"error": "<string>",
"message": "<string>",
"resource": "<string>",
"reason": "<string>"
}{
"error": "<string>",
"message": "<string>",
"resource": "<string>",
"reason": "<string>"
}{
"error": "<string>",
"message": "<string>",
"resource": "<string>",
"reason": "<string>"
}Authorizations
A Reactor API key (rk_...), sent as Authorization: Bearer rk_.... Keep it on a server.
Path Parameters
The model's ID (not its project ID). Find it with GET /models?name=your-org/your-model.
The release tag, such as v1.2.3-gabcdef0.
"v1.2.3-gabcdef0"
Body
curl --request POST \
--url https://api.reactor.inc/models/{id}/releases/{release}/weights/multipart \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"name": "model.safetensors",
"size": 21474836480,
"sha256": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"
}
'import requests
url = "https://api.reactor.inc/models/{id}/releases/{release}/weights/multipart"
payload = {
"name": "model.safetensors",
"size": 21474836480,
"sha256": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"
}
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({
name: 'model.safetensors',
size: 21474836480,
sha256: '9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08'
})
};
fetch('https://api.reactor.inc/models/{id}/releases/{release}/weights/multipart', 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.reactor.inc/models/{id}/releases/{release}/weights/multipart",
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([
'name' => 'model.safetensors',
'size' => 21474836480,
'sha256' => '9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08'
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($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.reactor.inc/models/{id}/releases/{release}/weights/multipart"
payload := strings.NewReader("{\n \"name\": \"model.safetensors\",\n \"size\": 21474836480,\n \"sha256\": \"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08\"\n}")
req, _ := http.NewRequest("POST", url, payload)
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.reactor.inc/models/{id}/releases/{release}/weights/multipart")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"name\": \"model.safetensors\",\n \"size\": 21474836480,\n \"sha256\": \"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.reactor.inc/models/{id}/releases/{release}/weights/multipart")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"name\": \"model.safetensors\",\n \"size\": 21474836480,\n \"sha256\": \"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08\"\n}"
response = http.request(request)
puts response.read_body{
"upload_id": "2~xYzAbC123",
"key": "partners/8c8b7e12-a4c1-4627-b0a0-5d2e9f3a7b61/weights/your-model/7b3f1bc2-a4e5-4d78-b9c1-0e6c2f9a1d34/v1.2.3-gabcdef0/files/model.safetensors",
"part_size": 67108864,
"parts": [
{
"part_number": 1,
"url": "https://storage.example.com/...?partNumber=1&uploadId=2~xYzAbC123",
"content_length": 67108864
},
{
"part_number": 2,
"url": "https://storage.example.com/...?partNumber=2&uploadId=2~xYzAbC123",
"content_length": 67108864
}
]
}{
"error": "<string>",
"message": "<string>",
"resource": "<string>",
"reason": "<string>"
}{
"error": "<string>",
"message": "<string>",
"resource": "<string>",
"reason": "<string>"
}{
"error": "<string>",
"message": "<string>",
"resource": "<string>",
"reason": "<string>"
}{
"error": "<string>",
"message": "<string>",
"resource": "<string>",
"reason": "<string>"
}{
"error": "<string>",
"message": "<string>",
"resource": "<string>",
"reason": "<string>"
}